The story
ASTA (América do Sul Táxi Aéreo Ltda) has existed since 1995 as an air taxi company but on December 29, 2009, the company received authorization to operate regular flights albeit still under charter status.
On August 22, 2019, ASTA signed an interline agreement with Azul Brazilian Airlines. According to this agreement, ASTA would provide feeder services to Azul flights to and from the base at Cuiabá. This agreement was later terminated because Azul started operating feeder services via its subsidiary Azul Conecta.
On April 8, 2021, ASTA decided to suspend indefinitely all regular flights but retained the AOC for such flights. The company continues to operate as an air taxi company.
From Wikipedia’s article on ASTA Linhas Aéreas, shared under CC BY-SA 4.0.4