How important is it to have a two-way ticket when traveling to Thailand?

When traveling to Thailand, having a two-way ticket is not strictly necessary, but it often depends on the airline and your method of entry. Many travelers have reported that airlines frequently require proof of an onward ticket, especially if entering on a visa-exempt basis or a tourist visa. A ticket out of Thailand to any destination (like Kuala Lumpur) is generally accepted, and on some occasions, travelers have been able to board flights with a one-way ticket by signing an indemnity form or by showing cash to buy an onward ticket if needed. Given the varied experiences of travelers, it’s best to secure an onward ticket to avoid potential boarding issues.