Udon Thani International Airport (IATA: UTH, ICAO: VTUD) is an international airport near the city of Udon Than in Udon Thani Province in the northeast region of Thailand. It is approximately 450 kilometres (280 mi) northeast of Bangkok. It currently has domestic flights to and from Bangkok (Suvarnabhumi and Don Mueang), Chiang Mai (on Nok Air), Hat Yai (on Thai Lion Air), Phuket (on Thai AirAsia), Rayong (on Thai AirAsia), and Ubon Ratchathani (on Nok Air). It has been managed by the Department... Udon Thani International Airport (IATA: UTH, ICAO: VTUD) is an international airport near the city of Udon Than in Udon Thani Province in the northeast region of Thailand. It is approximately 450 kilometres (280 mi) northeast of Bangkok. It currently has domestic flights to and from Bangkok (Suvarnabhumi and Don Mueang), Chiang Mai (on Nok Air), Hat Yai (on Thai Lion Air), Phuket (on Thai AirAsia), Rayong (on Thai AirAsia), and Ubon Ratchathani (on Nok Air). It has been managed by the Department of Airports (DOA). During the Vietnam War the facility was known as Udorn Royal Thai Air Force Base, serving as a front-line base of the United States Air Force and was the Asian headquarters for Air America.