Chiang Rai-Bangkok
Like most Thai airports bearing the tag, Chiang Rai’s “international” airport does not actually serve any international flights, and it feels rather too large for its modest volume of flights to Bangkok, Bangkok and more Bangkok (plus a daily hop to Chiang Mai).
As for Air Asia, it does what it says on the box. They’ve got a winning formula and they stick to it, so see this old trip report for the full scoop on the FD experience. Today’s flight was on one of the slowly-being-phased-out 737s, but still in perfectly serviceable condition with leather seats and tolerable pitch, and our flight departed and arrived precisely on time and in one piece.