In August 2018 the Department of Airports announced that it will spend 3.5 billion baht to upgrade Hua Hin Airport over the next five years. The number of travellers using the airport is expected to increase by tenfold, to three million a year, in that timeframe. The upgrade is part of the "Riviera Thailand" and Southern Economic Corridor projects. The work at the airport will take four to five years. It includes enlarging the existing passenger terminal, building a second one, expanding hangar space, and widening the runway from 35[2] to 45 metres.[3]
The runways RESA are below ICAOs recommendation.