Top Sixt Direct car hire locations in Thailand Most popular rental airports Bangkok - Suvarnabhumi Airport (BKK) Chiang Mai - Airport (CNX) Hat Yai - Airport (HDY) Khon Kaen - Airport (KKC) Koh Samui - Airport (USM) Krabi - Airport (KBV) Phuket - Airport (HKT) Surat Thani - Airport (URT) Ubon Ratchathani - Airport (UBP) Udon Thani - Airport (UTH)