Thai Lion Air is a Thai low-cost airline operating with Thai partners as an associate company of the Indonesian Lion Air. The carrier operates from Bangkok's Don Mueang International Airport, with plans to serve domestic and international scheduled flights from other cities in Thailand. Its head office is in the Don Mueang District, Bangkok.

Its inaugural flight was on December 4, 2013 on the Bangkok- Chiang Mai route, with full services one day later. Thai Lion Air concluded the agreement with fellow Lion Air subsidiary Malindo Air on December 10, 2013, allowing both carriers to serve the flight between Kuala Lumpur International Airport and Bangkok.

As of September 2025^[update], Thai Lion Air flies (or has flown) to the following destinations:

Thai Lion Air currently has Interline agreements with APG Airlines and its parent company Lion Air

As of August 2025^[update], Thai Lion Air operates the following aircraft:

Thai Lion Air has previously operated the following aircraft:^{[citation needed]}