| Cha-ian Airport | |
| Iata: | NST |
| Icao: | VTSN |
| Type: | Military |
| Owner-Oper: | Royal Thai Army |
| City-Served: | Nakhon Si Thammarat |
| Location: | Pak Phun, Nakhon Si Thammarat, Thailand |
| Elevation-F: | 44 |
| Coordinates: | 8.4711°N 99.9556°W |
| Pushpin Map: | Thailand |
| Pushpin Map Caption: | Location in Thailand |
| R1-Number: | 18/36 |
| R1-Length-F: | 7,546 |
| R1-Length-M: | 2,300 |
| R1-Surface: | Asphalt |
Cha-ian Airport (Thai: สนามบินชะเอียน) is a Thai military airport operated by the Fourth Army, Royal Thai Army in the Pak Phun sub-district of Nakhon Si Thammarat Province, in southern Thailand. The Thai Airways Company formerly used Cha-ian Airport for passenger flights between Nakhon Si Thammarat-Surat Thani-Bangkok. Today, the airport is used by the military to transport the royal family.[1]
In 1916, King Rama VI built temporary accommodation at Suan-Jun sub-district or Royal Thai 4th Army (Cha Eian Airport).
Starting in 1985, Thai Airways Company operated passenger services at Cha-ian Airport until 1988 when it merged into Thai International.
On 1 December 1998, Nakhon Si Thammarat Airport opened for commercial services, and Cha-ian Airport is now a military airbase.
Today, there are no scheduled flights from this airport. Formerly, Thai Airways operated flights from here to Surat Thani and Bangkok.