Originally Posted by
dsquared37
OP is eligible for a visa exemption so I fail to see the relevance. TIMATIC does state that visitors eligble for the exemption who don't possess an onward/return ticket could be denied entry but 1) I know nobody who's ever been asked for proof of this by immigration and 2) OP has a return ticket. Nothing states the onward/return ticket must be within the confines of the exemption stamp.
http://www.thaiembassy.com/thailand/...isa-exempt.php
"They must have a confirmed return ticket to show that they are flying out of Thailand within 30 or 15 days of entry, as appropriate. Open tickets do not qualify. Traveling over land out of Thailand by train, bus, etc to Cambodia, Laos, Malaysia (including en route to Singapore), Myanmar, etc is not accepted as proof of exiting Thailand.
You may be asked to show your flight ticket on entering Thailand. If you do not possess a flight ticket to show you will be exiting Thailand within 30 or 15 days of entry you will be most likely to be refused entry."
OP's return ticket is 31 days, therefore he *could* be denied entry. Therefore the airline in the US won't board him. I have personally been challenged by the airline to prove I had an outbound air ticket before they would let me board in the US