Do I need to book a return flight before traveling to Thailand on a 30-day visa exemption with an open return ticket?

A user is inquiring about the necessity of booking a return flight prior to traveling to Thailand on a 30-day visa exemption with a one-way ticket. Several comments indicate that airlines may require proof of onward travel to board the flight. Some users mention having to show return tickets or cash reserves when asked by airline staff, while others suggest contacting airlines for their specific policies regarding booked return tickets when traveling under the visa-exempt category. Overall, it appears prudent to secure a booked return flight before check-in to avoid potential issues.