Thai Smile Airways, the trendiest, friendliest and worthiest Thai airline, offers flights out of Bangkok to domestic destinations, including Khon Kaen, Udon Thani, Ubon Ratchathani, Chiang Mai, Chiang Rai, Surat Thani, Krabi, Phuket, Narathiwat, and Hat Yai, and 1 international destination, Macau, Chansha, Siem Reap, Yangon.