Do I need to show a return ticket when flying to Bangkok?

@Paul ******

if you enjoy spending time in lines…

@Vitaly *******

You literally have to check-in at the counter, drop your bag and that's where you show your visa.

@Paul ******

the poster literally says he already checked in online and doesn’t need to interact with them (no bag)

@Paul ******

not if you don't have any bags to check in and did the process online or at one of the self service kiosks.

That said, often if flying international and the country has visa requirements, you can get a notification that online and kiosk check-in is not possible and you need to go to the counter.

@Nicolas *************

In any case, ground staff can request to see the visa at any point in the airport, be it check in counter or gate counter, there is no "definitive location".

@Emile *****

You do. I've never come across an international flight where I didn't have interaction with a check-in agent. Even bag drop for internet check-ins have an agent which then checks your passport and visa.