Hello! I arrived in Chiang Mai and got a visa exempt entry. I plan to get a 30 day extension as well. If my 30 day extension ends March 4th, can my flight out be March 4th? Or do I have to leave by March 3rd? Thank you in advance any help!
TLDR : Answer Summary
If your 30-day visa extension ends on March 4th, you can schedule your flight for that day. You need to exit Thailand by 11:59 PM on March 4th, so it is possible to leave on the same day your extension expires. However, some users recommend leaving a day earlier to avoid any last-minute issues.