The story
In September 2006, Mesa announced that it had reached an agreement with Mokulele Airlines, whereby Mokulele would operate Cessna Grand Caravan aircraft to Kapalua, Molokai, and Lanai under the Go!Express brand. Service began with flights from Kapalua to Honolulu, Kahului, and Kona on April 17, 2007. Service began for flights to Molokai on July 21, 2007, and flights to Lanai on October 6, 2007. Following Mokulele's agreement with Republic Airways Holdings to have that company operate flights in Hawaii using 70-seat jets, Mesa announced that it will be terminating the Go!Express agreement with Mokuelele in April 2009. The airline later accelerated plans to terminate the agreement with Mokulele, and ended the code-share on March 24, 2009, replacing it with a new agreement with Island Air that allows Mesa to sell existing Island Air flights with the Go!Express name.
With Mesa Air Groups acquisition of Mokulele Airlines, go! resumed codesharing on flights operated by Mokulele, but the Go!Express branding was not adopted.
From Wikipedia’s article on Go!Express, shared under CC BY-SA 4.0.4