TAP Air Portugal is the flag carrier of Portugal, headquartered at Lisbon Airport which also serves as its hub. TAP – Transportes Aéreos Portugueses – has been a member of the Star Alliance since 2005 and operates on average 2,500 flights a week to 90 destinations in 34 countries worldwide. As of May 2019 the company has a fleet of 100 aircraft, all of which are manufactured by Airbus with the exception of 19 aircraft manufactured by Embraer, operating on behalf of the regional airline TAP Express.

Star Alliance is the world's first global airline alliance. Founded on 14 May 1997, it is headquartered on the grounds of Frankfurt Airport in Frankfurt, Germany, with a subsidiary management company in Singapore. Star Alliance is also the world's largest airline alliance by market share as of April 2024, with 17.4% of the market share, compared to 13.7% of SkyTeam and 11.9% of Oneworld.