THe ONLY problem u will have flying in and looking to get a visa exempt is if ur traveling on a one way ticket an they ask u when u check in for a forwarding or return ticket and you Dont have one :-)
come in on a free 30 day visa exempt an extend for another 30 here ( the above info is wrong as u get a 30 days extension and each visa exempt entry is 30 days NOT 14 for americans) ) > Much easier
Proof of onward transit :- long happily ignored by Thai immigration, has been known to be strictly applied in some instances (Indian passport holders beware). The requirement is for an international flight itinerary - NOT train, ferry, or other departure type
OK guys believe what you want> BUT people have been refused boarding with ONLY a bus ticket out
as a bus ticket is about the same price as using onwardflights. why take the chance?
From ThaiEmbassy.com (not the official website of the Thai embassy):
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. Travelling overland 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.