Udon Thani International Airport (IATA: UTH, ICAO: VTUD) is in Nong Khon Kwang subdistrict, Mueang Udon Thani district, Udon Thani province in northeastern 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). In 2006, the airport had 677,411 passengers movements and 1,558 MT cargo movements. In 2013, the airport handled 1,325,305 passengers. In 2015, it handled 2,213,689 passengers and 3,678 tonnes of freight. It has been managed by the Department of Airports (DOA).

Udon Thani Airport is the DOA's money-maker, with profits reaching 100 million baht a year. This airport will be transferred to Airports of Thailand PCL (AOT) in the first half of 2023.