U-Tapao Airport announced on Wednesday that it was closing services until the end of January.
The airport, which is two hours from Bangkok in the eastern province of Rayong, is cancelling all fights this month because it falls in “red zone”.
Provinces marked “red” have been designated “maximum control zones” based on the number of Covid-19 infections in the new wave.
Three airlines flying out of U-Tapao, namely Thai AirAsia, Thai Lion Air and Bangkok Airways, have cancelled their flights until further notice.
The airlines fly to Chiang Mai, Hat Yai, Phuket and Udon Thani from this airport.
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