Do I need to book a return flight to Thailand or can I book onward travel to a different country?

The need for a return flight to Thailand depends on airline policies and individual circumstances. Generally, passengers are required to show proof of 'onward travel' out of Thailand, which can be a ticket to a neighboring country like Laos. While it’s not mandatory to have a return ticket, it's advisable to have some documentation ready for immigration checks. Many travelers suggest using services that allow you to reserve a flight for a couple of days without full payment, but always check the specific requirements of your airline.