Siam Air (Bangkok Don Mueang) is about to take delivery of its first B737NG aircraft, with an ex-Air Berlin (1991) (Berlin Tegel) B737-800 (msn 37758) currently being prepared for the Thai leisure carrier.

Siam Air Transport has launched operations in 2013 and currently operates two B737-300s on scheduled flights from Bangkok's Don Mueang airport to Hong Kong International, Guangzhou and Zhengzhou in cooperation with Chinese tour operators and sister carrier Orient Thai Airlines (Bangkok Suvarnabhumi).