U-Tapao–Rayong–Pattaya International Airport, also spelled Utapao and U-Taphao, is a dual-use civil–military public international airport serving the cities of Rayong and Pattaya in Eastern Thailand in the Ban Chang district of Rayong province. It also serves as the U-Tapao Royal Thai Navy Airfield, home of the Royal Thai Navy First Air Wing. U-Tapao is the home of a large Thai Airways maintenance facility, servicing that airline's aircraft as well as those of other customers.