WestJet

WestJet entered into a two-year agreement with Air Transat in August 2003 whereby WestJet aircraft would be filled by Transat's two main tour operators, World of Vacations and Transat Holidays. These chartered flights operated largely to destinations in Mexico and the Caribbean and the planes were operated by WestJet crews. This agreement between WestJet and Air Transat was amicably terminated in February 2009.

In 2004, rival airline Air Canada accused WestJet of industrial espionage and filed a civil suit against WestJet in Ontario Superior Court. Air Canada accused WestJet of accessing Air Canada confidential information via a private website to gain a business advantage. On May 29, 2006, WestJet admitted to the charges levelled by Air Canada and agreed to pay C$5.5 million in legal and investigation fees to Air Canada and donate C$10 million to various children's charities in the names of Air Canada and WestJet.

2004–2006: International expansion

In January 2004, WestJet announced that it was moving the focus of its Eastern operations from Hamilton to Toronto the following April, fully moving into the lucrative Toronto–Ottawa–Montreal triangle and tripling the total number of its flights out of Toronto Pearson International Airport.

In 2004, several U.S. destinations were added or announced. These included San Francisco, Los Angeles, Phoenix, Tampa, Fort Lauderdale, Orlando and LaGuardia Airport in New York City. In early 2005, Palm Springs and San Diego were added to the company's list of destinations, while New York–LaGuardia was dropped. In April 2005, it announced new seasonal service to Charlottetown and ceased service to Gander. In fall 2005, Fort Myers and Las Vegas were added to the growing list of destinations.

In late August 2005, WestJet flew to Baton Rouge, Louisiana, transporting members of a Vancouver-based urban search and rescue team to assist with Hurricane Katrina relief efforts.

After rumours and speculation surrounding the implementation of extended-range twin-engine operations (ETOPS), WestJet announced new service to Hawaii from Vancouver on September 20, 2005. In December 2005, the airline began flying from Vancouver to Honolulu and Maui.

WestJet's first scheduled service outside Canada and the United States began in 2006, to Nassau, The Bahamas. This was considered a huge milestone within the company's long-term destination strategy and was a vital goal for future international market presence.

In September 2006, Sean Durfy took over as president of WestJet from founder Clive Beddoe.

On October 26, 2006, WestJet announced that it had its best quarterly profit to date, of C$52.8 million.

2007–2009: Continued growth

In 2007, WestJet announced that it would begin flights from Deer Lake in Newfoundland, Saint John in New Brunswick and Kitchener-Waterloo in Ontario. In June 2007, WestJet added seven new international seasonal flights to Saint Lucia, Jamaica, the Dominican Republic, Mexico as well as a third Hawaiian destination, Kona.

The same year, WestJet commissioned the construction of a new six-story head office building, next to their existing hangar facility at the Calgary International Airport. The building was constructed following the Leadership in Energy and Environmental Design (LEED) Green Building Rating System, featuring a rainwater retention system and geothermal heating. The first employees moved in during the first quarter of 2009, and the building officially opened the following May. The WestJet Campus building was certified as LEED Gold standard in October 2011.

In May 2008, WestJet launched daily non-stop service to Quebec City. The next month, WestJet commenced seasonal service between Calgary and New York City via Newark Liberty International Airport. In May 2009, the airline launched new seasonal service to the cities of Yellowknife, Northwest Territories and Sydney, Nova Scotia; service to Yellowknife was later extended through the winter of 2009–10.

In the first decade of the 2000s, WestJet made significant gains in domestic market share against Air Canada. In 2000, it held only 7% to Air Canada's 77%, though by the end of 2009 WestJet had risen to 38%, against Air Canada's 55%.

In late April 2009, WestJet temporarily suspended service to several of its destinations in Mexico due to the outbreak of influenza A (H1N1) in the country. The suspension of service to Cabo San Lucas, Mazatlán and Puerto Vallarta lasted from early May until mid June, with seasonal service to Cancún being restored the following fall.

In July 2009, WestJet announced 11 new international destinations for its winter schedule. These included expanded service to the United States, to Atlantic City, New Jersey, Lihue (Kauai), Hawaii and Miami, Florida. New Caribbean destinations included Providenciales, in the Turks and Caicos Islands; Sint Maarten, Netherlands Antilles; Freeport, The Bahamas; as well as the cities of Varadero, Holguín and Cayo Coco in Cuba. Ixtapa and Cozumel were also added to the list of destinations served in Mexico.

In November 2009, WestJet announced service to the British island territory of Bermuda, which commenced in May 2010. WestJet also resumed seasonal service to Windsor, Ontario that same month.

2010–2016: Overseas expansion

In March 2010, Sean Durfy resigned from his position as WestJet's CEO, citing personal reasons. He was replaced by Gregg Saretsky, a former executive at Canadian Airlines and Alaska Airlines and previously vice-president of WestJet Vacations and Executive Vice-president of Operations.

In July 2010, WestJet announced service to Santa Clara, Cuba, New Orleans and Grand Cayman bringing the total number of destinations to 71. Service to New Orleans lasted only one season and did not return the next year.

In late 2010, WestJet announced it was wet-leasing a Boeing 757 aircraft to expand service between Calgary to Honolulu and Maui and Edmonton to Maui, on a seasonal basis. Also that year, the Canadian Transportation Agency (CTA), an independent administrative tribunal of the Government of Canada that regulates airlines, found WestJet's baggage policies to be unreasonable and/or contrary to the requirements of the Canada Transportation Act and/or the Air Transport Regulations on several different occasions.

On January 26, 2011, after Air Canada terminated California service, WestJet announced plans to enter service to John Wayne Airport in Orange County, California, from Vancouver and Calgary starting May of that year.

In November 2011, WestJet won an auction for time slots at New York's LaGuardia Airport ushering in a return to service to New York. Details of WestJet's scheduled service to LaGuardia were officially announced in January 2012. From 2012 to 2014, WestJet further expanded into the United States by adding Chicago via O'Hare International Airport, Dallas Fort Worth International Airport, Myrtle Beach International Airport, and New York's John F. Kennedy International Airport.

On November 15, 2013, WestJet announced their first destination in Europe. Seasonal service from St. John's, Newfoundland to Dublin, Ireland, would operate from June to October 2014.

In January 2014, WestJet chartered an Atlas Air Boeing 747-400 to transport stranded passengers and luggage during the 2013 Central and Eastern Canada ice storm. The charter flew from Toronto Pearson International Airport to Calgary International Airport.

On July 7, 2014, WestJet announced that it was in the "advanced stages of sourcing" four wide-body aircraft that would begin flying by the fall of 2015. These would initially serve on the seasonal Alberta-Hawaii routes when WestJet's service agreement with Thomas Cook Airlines—who currently fly these routes on behalf of WestJet—expires in the spring of 2015. WestJet would take delivery of four Boeing 767-300ERs in summer 2015. WestJet took delivery of the first of these aircraft on August 27, 2015.

On June 16, 2015, WestJet announced the launch of service to London's Gatwick Airport on May 6, 2016. It is the carrier's third transatlantic destination after Dublin and Glasgow. The majority of flights to London use the wide-body 767-300ER aircraft. On September 15, 2015, WestJet flights to London direct from Edmonton, St. John's, Vancouver, Winnipeg (seasonal) Calgary and Toronto (year-round) went on sale to the public. During winter months, WestJet continued to serve the seasonal Edmonton – Maui, Calgary – Honolulu, and Calgary – Maui flights with the 767-300ER aircraft before their eventual retirement in 2020.

2017–2019: Transition to full-service carrier

In April 2017, WestJet announced plans to launch an ultra-low-cost carrier in late 2017. The new airline would operate using Boeing 737-800 aircraft, and compete with new entrants to the market, such as Flair Airlines. The launch of the new airline, named Swoop, was delayed until June 2018.

On December 6, 2017, WestJet and Delta Air Lines signed a preliminary memorandum of understanding to extend their current codeshare agreement into a joint venture, pending regulatory and board approval. On July 19, 2018, WestJet and Delta Air Lines signed a definitive ten-year agreement into a joint venture between the two airlines. This joint venture would have served more than 95% of the Canada–U.S. demand. The airlines' current frequent flier programs would also be updated to be more closely aligned, and the airlines will be co-located at key hub airports. However, in November 2020, Delta and WestJet agreed to scrap their plans for a joint venture, as the demands of the United States Department of Transportation were seen "unreasonable and unacceptable" by both airlines.

While announcing an expansion of the senior leadership team on January 11, 2018, Gregg Saretsky reconfirmed the airline's strategic goal to become a global, full-service carrier.

On March 8, 2018, the CEO of WestJet, Gregg Saretsky retired. He was replaced by company vice-president, Ed Sims.

On May 8, 2018, WestJet announced that it would be adding the Boeing 787-9 to its fleet. The first aircraft was delivered to the airline in January 2019.

On May 10, 2018, WestJet's unionized pilots voted 91 percent in favour of strike action. The key issue in negotiations was the outsourcing of work to operate Swoop aircraft. On May 25, 2018, WestJet and the Air Line Pilots Association (ALPA) agreed to a settlement process through the Federal Mediation and Conciliation Service.

On May 14, 2018, WestJet announced new 2-2 Premium Economy seating to replace its previous 3-3 seats which had a middle seat blocker. The new seats feature a wider configuration on 737 aircraft. The offering began on its Boeing 737 MAX 8 aircraft in winter 2018, with all 737s being reconfigured by 2020.

On May 31, 2018, WestJet expanded operations into Europe beyond the UK and Ireland, with its inaugural flight from Halifax Stanfield International Airport to Paris' Charles de Gaulle Airport.

The Canadian Union of Public Employees (CUPE) announced its application to the Canadian Government for certification of WestJet's approximately 3,200 flight attendants on July 9, 2018. On July 31, 2018, the Government of Canada via the Canada Industrial Relations Board (CIRB) issued an interim order certifying CUPE as the accredited union for WestJet mainline flight attendants.

On October 12, 2018, WestJet announced its new branding, along with details on the arrival on the Boeing 787-9. WestJet changed its slogan from "Owners Care" to "Love where you're going", announced a new logo (however, that logo was seen back in May with the announcement of the Boeing 787-9 along with its livery), announced the Boeing 787 routes and launch dates, and an overall new brand image. Boeing 787 flights were announced to commence on April 28, 2019, with service from Calgary International Airport to London Gatwick, with service to Paris and Dublin following.

On May 13, 2019, WestJet announced it had reached an agreement to be purchased by Onex Corporation for $5 billion Canadian dollars. At the time, it had 13 Boeing 737 MAX jets in suspended operation, with another 57 of the type ordered from the manufacturer. The purchase price of WestJet was slashed heavily due to the grounding of the MAX aircraft.

2020–2022: COVID-19 pandemic

Due to the COVID-19 pandemic response required by world governments including Canada, WestJet faced an unprecedented decline in demand for flights along with the rest of the aviation industry. In addition, there were numerous cases of COVID-19 reported on board WestJet flights.

In March 2020, WestJet suspended all international flights, resulting in widespread workforce adjustments. Approximately half of the employees, totalling 6,900, were laid off on March 24. Subsequently, on April 9, WestJet temporarily rehired 6,400 employees through the federal wage subsidy program (CEWS). Additional layoffs followed, with approximately 8,000 employees between April and June, as part of a restructuring plan, leaving only 4,500 employees on the payroll. Before the pandemic, WestJet employed over 14,000 individuals. By February 2021, the company laid off an additional 250 staff members due to ongoing travel restrictions. However, it is noteworthy that a majority of employees were successfully recalled by February 2022, reflecting the company's efforts in adapting to the challenging circumstances.

In June, 2021, WestJet announced that they would begin dedicated freighter operations using converted Boeing 737-800BCF Freighters in an attempt to benefit from the heavy cargo operations that occurred globally during the pandemic, but also to disrupt the air cargo industry in Canada. Although the first freighter was delivered in April, 2022 they would not be certified by transport Canada for over a year after delivery in April 2023, with operations beginning later that same month. Initially, there were three BCF's in the fleet, with a fourth joining later on that year.

2022–present: Focus on Western Canada and strategic low-cost plan

On June 16, 2022, WestJet announced that it will be reaffirming the airline's commitment to "embracing its cost-conscious roots in service of affordable air travel for Canadians". With this in mind, the current CEO has announced that the airline will be returning to its low-cost roots, shifting its focus to western Canada, and investing in leisure routes. This change resulted in numerous routes and destinations in eastern Canada to be dropped.

On September 29, 2022, WestJet announced it had placed an order for an additional 42 Boeing 737 MAX 10 aircraft, making the airline's narrow-body order book the largest in Canada.

On October 6, 2022, WestJet's CEO, Alexis von Hoensbroech, and Alberta Premier, Jason Kenney, announced a major partnership between the Government of Alberta and the WestJet Group. The agreement outlined that Calgary International Airport would become WestJet's sole global hub and the company would designate the airport as "the only airport where WestJet connects directly to intercontinental destinations" Additionally, WestJet would base its entire Boeing 787 Dreamliner fleet in Calgary, opening up the potential for new routes to Europe and Asia. WestJet would also base over 100 aircraft in Calgary and double its capacity at the airport before the end of the decade.

On December 5, 2022, WestJet announced its first destination in Asia, with service from Calgary International Airport to Narita International Airport beginning with three times weekly service on April 30, 2023. WestJet also announced new routes from Calgary to Barcelona–El Prat Airport and Edinburgh Airport, both being served three times a week beginning in May 2023, as well as frequency increases on existing European routes as a part of their plan to increase capacity in Calgary by more than 25% in 2023.

In November 2023, WestJet announced the restart of transatlantic service in Eastern Canada utilizing its Boeing 737 MAX 8 fleet, with the return of service from Toronto to Dublin and Edinburgh, St. John's to London (Gatwick) and Halifax to Dublin, Edinburgh and London (Gatwick). The airline also announced the expansion of transatlantic service from Calgary with new non-stop flights to Keflavík Airport in Reykjavík, Iceland. WestJet also revealed plans to expand its Asian footprint with new seasonal service from Calgary International Airport to South Korea's Incheon International Airport.

In June 2024, WestJet's aircraft mechanic union launched a three-day strike, forcing over 1000 flights to be cancelled in the lead up to the Canada Day long weekend. In October 2024, WestJet will be transitioning all WestJet Link routes from Link to Encore, ending the airline's six-year capacity purchase agreement with Pacific Coastal Airlines. The change is announced as a growth strategy for WestJet's regional network, which will see the WestJet Link routes now being operated by WestJet Encore's 78-seat Bombardier Q400, as opposed to Pacific Coastal's 34-seat Saab 340B.

History

In 1999, WestJet was in talks regarding a possible 'feeder' arrangement for Air Canada's network. These talks were discontinued when Air Canada went forward with the acquisition of Canadian Airlines the following year.

In 2005, WestJet began a limited interline agreement with Taiwan-based China Airlines, in part to test the company's capability to partner with other carriers.

In 2006, WestJet announced it had been in talks with 70 airlines around the world interested in an interline or codeshare agreement. In August 2006, in a Globe and Mail interview, then-WestJet CEO Sean Durfy stated that WestJet was in talks with Oneworld. Durfy said that, if a deal with Oneworld were reached, it would allow WestJet to maintain its scheduling flexibility; Durfy was later quoted in 2007 saying that a deal for WestJet to join the Oneworld alliance was unlikely. Despite this, WestJet did formalize a deal with Oneworld in November 2008, to partner on sales of travel to corporate and business travellers.

In July 2008, WestJet announced it had signed a memorandum of understanding to build a distribution and codeshare agreement with U.S.-based Southwest Airlines. However, in April 2010, WestJet announced that the airline partnership with Southwest Airlines was terminated, and in October 2010, WestJet partnered with American Airlines instead and later added Delta Air Lines. In light of a possible joint venture between WestJet and Delta, American and WestJet ceased their codeshare agreement on July 31, 2018.

In May 2025, it was announced that Delta Air Lines, Korean Air, and Air France-KLM had purchased a collective 25% stake in WestJet, finalizing in October. This has fueled speculation in the industry that the airline may join the SkyTeam airline alliance.

In 2015, WestJet would begin operating its first widebody aircraft - Boeing 767 family aircraft, acquired second-hand from Qantas. Four 767-300ERs began arriving in winter 2015 and were first used on routes primarily to and from Hawaii and the Caribbean (replacing chartered Boeing 757s that previously operated to Hawaii from Calgary and Edmonton), however in 2016 the airline started service to London Gatwick Airport from Calgary, Toronto, Vancouver, Edmonton and Winnipeg. Despite generally being a success, the 767s were unreliable as a result of their age, frequently resulting in delays, cancellations, and diversions to Iceland or Greenland. As a result, the transatlantic widebody offerings would eventually just be slimmed down to year-round service from Toronto and Calgary.

In 2017, in an effort to both expand transoceanic service and phase out the unreliable 767s, WestJet ordered 10 Boeing 787-9 aircraft, with 10 additional options. As part of the shift to a full-service carrier, these would be delivered in a three-class 320-seat configuration from 2019 onwards. In October 2018, the first 787 routes were revealed to be Calgary to Dublin and Paris, Toronto to Barcelona, and the replacement of the Boeing 767 on the Calgary to London Gatwick route, all to take effect in 2019. The COVID-19 pandemic put many further plans on hold, with the 787 order slimmed down to 7 and further options not pursued. In the wake of the pandemic, international widebody expansion resumed out of Calgary, with Amsterdam joining the route map in 2021 and Edinburgh, Dublin, and London Heathrow being announced in 2022. Heathrow and Gatwick would operate alongside each other until the end of the 2024 season, and the airline would also resume service to Barcelona from Calgary, with the service from Toronto suspended after the 2021 season. The first transpacific destination for WestJet was launched in 2023, with service to Tokyo Narita Airport, and WestJet would also add Seoul Incheon Airport to its route map in 2024. In 2025, WestJet placed an order to double its 787 fleet with Boeing, with 7 additional aircraft and 4 options. In January 2026, the airline announced it will begin seasonal winter service to São Paulo that November.

In addition to widebody operations, WestJet also operates a significant network of long-haul narrowbody routes, and has since it launched a route from Halifax to Glasgow on the 737-700 in 2015. WestJet has operated several narrowbody transatlantic routes since then, but all routes were suspended for the 2023 season due to shifting business strategies. Select routes returned and new ones launched for 2024. Utilizing strategic hubs in Toronto, Halifax and St. John's, the airline sends Boeing 737 MAX aircraft to Amsterdam, Paris, Dublin, Barcelona, London Gatwick (replacing 787 service) and Edinburgh. In late 2025, a wave of new destinations were announced from Toronto and Halifax for the 2026 season, including Copenhagen, Lisbon, Madrid, Cardiff, Glasgow, and Ponta Delgada. In addition, the airline also serves Reykjavík, Iceland from Calgary, Edmonton and Winnipeg, and Medellín, Colombia from Toronto.

As of 2025, WestJet serves 30 destinations in the United States. They mostly fall into two categories: leisure-focused destinations for warm weather travel, theme parks and cruises (including Santa Ana, Fort Lauderdale, Orlando, Palm Springs, Las Vegas, Phoenix, Anchorage, and Honolulu) and major international airports designed for connecting traffic, often with partner airline Delta Air Lines (including New York JFK, Atlanta, Chicago ORD, Los Angeles, Seattle, Minneapolis, Detroit, and Washington, DC). Many US cities see service from cities across Western Canada, however some are only served from WestJet's headquarter city of Calgary.

WestJet also has a significant presence in the Caribbean and Latin America, with major multi-route operations to cities like Cancún, Puerto Vallarta, Puerto Plata, Montego Bay, San José del Cabo, and Varadero. Following the acquisition of Sunwing Airlines, many routes and destinations were transferred to the WestJet network. This network is highly seasonal, with many routes only operating from October to May. In recent years, non-leisure focused destinations south of the United States have also been added to the WestJet network, starting with Mexico City which was terminated in 2018 but re-launched for the 2025 season. Additional routes have included Guadalajara, Panama City and Medellín.

Fleet

Current fleet

As of September 10, 2026, WestJet operates an all-Boeing mainline fleet composed of the following aircraft:

Fleet strategy

The mainline fleet currently consists entirely of Boeing aircraft, while wholly owned subsidiary Encore flies Bombardier Q400s. Twenty aircraft were initially ordered with options for up to twenty-five more. The first two units were delivered in mid June 2013. Scheduled passenger service on these aircraft began on June 24, 2013. The first Boeing 737 Next Generation, a 737-700 delivery took place in 2001, and the first deliveries of 737-600 and 737-800 aircraft began in 2005, with the final 737-600 aircraft delivered in September 2006.

Boeing confirmed on August 2, 2007 that WestJet had placed an order for 23 Boeing 737 Next Generation aircraft. The order was primarily for 737-700 but with conversion rights to the larger Boeing 737-800s.

In the winter season before acquiring their Boeing 767s and Boeing 787 Dreamliners, WestJet temporarily wet leased some Boeing 757-200s to expand service between Alberta and Hawaii. From February through April 2011, a single aircraft was leased for this purpose; in the winter of 2011–12, a single aircraft was again leased. For the winter seasons from 2012 to 2015, this was expanded to two aircraft. In April 2013, it was announced that WestJet would sell ten of its oldest 737-700s and purchase ten 737-800s to modernize and increase capacity of its fleet.

In May 2014, CEO Gregg Saretsky announced that WestJet was considering acquiring wide-body aircraft to operate long-haul international routes. By July of the same year, Saretsky confirmed that wide-body service would begin in 2015. In June 2014, WestJet announced that the wide-body aircraft were to be second-hand Boeing 767-300ERs sourced from Qantas. The four Boeing 767s were an average of 25 years old, which meant that they needed frequent repairs and downtime for sourcing parts. This resulted in a poor on-time performance of 38 percent in 2016, costing the airline approximately $5 million in the second quarter of 2016. In 2017, WestJet reduced the number of flights from Winnipeg and Edmonton to reduce utilization of the planes for the summer of 2017 to cope with any unforeseen delays or cancellations.

In late December 2016, 77% of WestJet pilots approved a new deal that will increase pay for pilots flying wide-body aircraft such as the Boeing 767, Boeing 787 or Airbus A330. In a statement, the airline said that it was seeking more large aircraft intending to add new destinations. Saretsky also stated that he hoped for wide-body growth to be responsible, but quick. As of May 2, 2017, WestJet announced the purchase of up to 20 Boeing 787-9 Dreamliner aircraft; 10 were firm orders with deliveries from 2019 through 2021, and 10 were options for delivery between 2020 and 2024. WestJet ended up only taking delivery of seven Boeing 787-9 aircraft and cancelling the remaining three aircraft (two of which fully built and furnished) from the original order, citing a shifting fleet and network strategy. In 2022, WestJet and the Government of Alberta signed a partnership deal that would, among other things, hub all 787 intercontinental flying out of Calgary and, in the following years, launched new direct long-haul routes from Calgary (including to Tokyo Narita and Seoul Incheon), quickly running into fleet constraints and operational issues with high aircraft utilization, a lack of spare aircraft, and the inability to launch any additional long haul routes. Thus, in September 2025, it was confirmed that the airline would place a further order for 7 787-9s with options for four more, in addition to 65 more MAX 10s (plus 20 options) which the airline was now the launch customer for.

Historical fleet

In 2003 and 2004, WestJet donated two of its 737-200s to post-secondary schools in western Canada, one to the British Columbia Institute of Technology and a second to the Southern Alberta Institute of Technology's Art Smith Aero Centre. In early 2005, it was announced that the Boeing 737 fleet would be retired and replaced by newer, more fuel-efficient 737 Next Generation series aircraft. On July 12, 2005, WestJet announced that it had completed the sale of its remaining 737-200 to Miami-based Apollo Aviation Group.

Boeing's 767s were first introduced to test the demand of flights to Europe, mainly to see if they could be successful with the routes. These 767s were acquired from Qantas, which had recently entirely retired their fleet of 767s. In July 2020, WestJet retired their fleet of four Boeing 767-300ER aircraft due to the COVID-19 pandemic. In January 2021, it was announced that the four 767-300 aircraft from WestJet were to be among a total of 11 to be purchased by Amazon and converted to freight use. As the testing was over, WestJet was comfortable with the European-Canadian market and would later utilize Boeing 787-9s.

Livery

WestJet's aircraft are painted white except for the lettering on the fuselage, wings and vertical stabilizer.

The tail is divided roughly into slanted thirds, coloured (from front to back) navy blue, white and teal. This pattern is used on the outside of the blended winglets at the end of the wings while, on the inside, the winglets are painted white with "WestJet.com" in dark blue lettering.

In February 2010, WestJet introduced a special livery on one Boeing 737-800 aircraft promoting its customer-service promise, or "Care-antee", in both English and French. This aircraft also featured a new tail design. In 2013, the Care-antee aircraft underwent a second livery change in partnership with Disney, featuring Mickey Mouse from the movie Fantasia and adopting the name "Magic Plane". A second Disney aircraft was completed in 2015, named "Frozen Plane", with characters Elsa and Anna on the vertical stabilizer and a similar theme in the cabin. Following the new CEO's decision, the Disney aircraft were repainted into the normal livery in 2024.

In May 2018, WestJet unveiled a new livery, the first significant change since the inception of the company. It includes a new font for the word "WestJet"; written across the middle of the aircraft fuselage is "The Spirit of Canada" on the port side and "L'esprit du Canada" on the starboard side. An updated, stylized maple leaf on the aircraft tail is also included.

In April 2022, WestJet Cargo's first dedicated freighter, a Boeing 737-800BCF, was delivered. It featured the airlines standard livery that was introduced in 2018, except it had largo "CARGO" titles following the WestJet titles on the side of the aircraft, as well as "In partnership with GTA" titles at the front of the aircraft. These titles are English on one side, and French on the other and signify the partnership WestJet began with GTA Aviation to help sell capacity on the freighters.

On October 28, 2023, WestJet's subsidiary Swoop was integrated into WestJet's mainly operations. All of the aircraft (Boeing 737-800s and 737MAX8s) were added to the fleet, with no repainting. Swoop branding was still visible on the aircraft after the Swoop's ending, with smaller WestJet logo stickers put on the aircraft. All of the 16 aircraft are scheduled to be repainted by the end of 2025, along with configuration editing to fit the WestJet normal.

In 2024, all special livery planes were repainted to the new WestJet livery, leaving no special liveries to be spotted. However, Swoop and Sunwing (May 2025 onward) liveries can be seen on WestJet aircraft due to no repainting. They are expected to be repainted by the end of 2025.

On May 28, 2025, Sunwing flew its final flight since WestJet bought ownership of the airline. A total of 18 aircraft were transferred from Sunwing to WestJet, without being repainted, and still with their all-economy configurations. The configurations are expected to be modified into the WestJet normal.

On March 10, 2023, the Canadian federal government formally approved the WestJet-Sunwing merger. "Today's decision was not taken lightly, especially in light of everything that happened over the holidays for those who flew with Sunwing," Canadian Transport Minister Omar Alghabra said in a statement, as he referred to the chaos during the December 2022 North American winter snowstorm that disrupted millions who had travel plans over the winter holidays. Sunwing's handling over the situation was heavily criticized as it left thousands stranded in Cancún, Mexico. "After considering the pros and cons, we have made the decision that will allow Sunwing to continue to provide affordable vacation packages to Canadians, create more good jobs and protect current jobs as well as Canadians who have already purchased tickets." he continued. However, with the green light, are several conditions in which the merger must follow. It goes as follows:

Extending Sunwing vacation packages to five new Canadian cities

Maintaining a vacations business head office in Toronto and a regional head office in Montreal for at least five years

Improve regional connectivity and baggage handling

Boost net employment at Sunwing's aforementioned Toronto head office

Gradually ending its seasonal plane-leasing practice to protect jobs in Canada (refers to Sunwing's seasonal practices of leasing its Boeing 737 aircraft to airlines in Europe, such as TUI, whom it has leased its aircraft to during the summer season for several years now.)

On May 1, 2023, the WestJet Group completed its acquisition of Sunwing Vacations and Sunwing. Stephen Hunter, formerly the CEO of Sunwing Vacations, has been appointed CEO of the WestJet Group's Vacations Business, responsible for all tour operating and vacation package businesses of both the Sunwing Vacations and WestJet Vacations brands. The WestJet Group's newly combined tour operator businesses, comprising WestJet Vacations and Sunwing Vacations, will be headquartered in Toronto, Ontario and will continue to operate a Montreal office.

On June 17, 2023, WestJet confirmed it will wind down Sunwing, integrating the low-cost carrier into its mainline business within two years as part of a plan to streamline operations on an unknown date.

On September 29, 2023, WestJet stated via an announcement that they aim to merge Sunwing's entirety into WestJet by October 2024. They plan to integrate all of Sunwing's 18 Boeing 737 aircraft into WestJet's mainline fleet and transition more than 2,000 current Sunwing employees into WestJet's existing structure by that date. This merger is on top of WestJet's decision to shut down Swoop, its former ultra-low-cost carrier which it brought into the market in 2017. As of October 2023, Swoop has been fully integrated into WestJet; however, the aircraft from Swoop retain the Swoop livery and cabin.