Do they ask for a return ticket when flying one-way to Phuket?

Situations at the airport can vary, but officially, a return ticket from Phuket is not required. Why might they ask for one? If you are denied entry at the border for any reason, the airline is responsible for flying you back, which can be costly for them.

Typically, the return ticket is checked during check-in, but in some cases, it may also be requested at immigration upon arrival. A useful tip: you can book a temporary flight reservation on specialized websites, which is much cheaper than purchasing an actual return ticket. This can save you stress at the border and prevent a last-minute rush to buy a ticket.