Top National car hire locations in Thailand Most popular rental airports Bangkok - Suvarnabhumi Airport (BKK) Chiang Mai - Airport (CNX) Chiang Rai - Airport (CEI) Don Mueang - Airport (DMK) Koh Samui - Airport (USM) Krabi - Airport (KBV) Phuket - Airport (HKT) Udon Thani - Airport (UTH)