Is it possible to enter Thailand with a one-way flight ticket?

Not quite. At check-in, you're not speaking to an immigration agent but an airline official. They will let you travel if you can convince them that you're able to meet the requirements for entry into the country you're heading to OR you sign a waiver that states you are releasing the airline from any liability in case you're refused entry at your destination.

@Mike *******

, I actually got about a US dollar back when I had to change dates.

@Jo *********

were you flying on one way tickets with no visa? Unless both applied to your situation, they shouldn't be asking anything.

@Ni**

yes many times and never been asked. it depends on which country your flying from . From posts Australian and North American airlines seam to ask frequently

@Jo *********

My son had to show onward ticket at Heathrow in order to board when he visited me in Bangkok.

@Jo *********

Singapore Airlines asks too, depends where you're coming from. Nearly 20 years ago I booked a one way ticket from Sydney to Bangkok on SQ, luckily I had an onward ticket to Phnom Penh on THAI, so they didn't bug me any further. What was also interesting is them quizzing me when I presented a multiple entry non-B visa. Normally if you present any visa and certainly any visa that isn't a tourist visa, no questions should be asked at all

@Jo *********

they are cracking down on that at check in.

Your check in agent might ask, not immigration.

@Lyndon ***********

not always, but better be prepared just in case. An onward ticket say 50 days after arriving in Thailand if your stamp is for 45 days is very unlikely to be questioned by an airline official. However, the absence of a ticket altogether is likely to lead to questions, particularly for travelers departing from North America, Australia or New Zealand. Europe is less finicky. Within Asean, some departure countries check (such as Vietnam) others don't care (Myanmar, Laos and Cambodia). At least that's been my experience.

@Ronald ********

your thinking is correct but airlines and bureaucrats don't think so logically. You're therefore better off buying a refundable onward or round trip ticket or at least one with flexible dates you can easily change.

@Lyndon ***********

as long as you have an onward or round trip ticket, agents aren't going to be nitpicking dates, especially if it's only a few days outside the permitted length of stay without a visa. What they will do is request proof of outbound travel if you're traveling on a one way ticket.

@Karim **************

blocked

@Lyndon ***********

can’t you read? He said he was booking his onward ticket to a neighbouring country.

@Ray ******

same here but for me 100 plus times

@Ray ******

same

@Ray ******

flown in about 6 times this year and have been asked everytime.

Before covid was rarely asked

@Ray ******

i’m regularly asked for a ticket out of Thailand by the airline flying me to Thailand

@Ray ******

yes have to agree never been asked. But last trip with Singapore Airlines, guy in front of me only had one way and they advised him he needed a return ticket. So you just never know.