Hi, if I go to Thailand for 40 Days can I fly to Singapore for a week and still get back in to Thailand? I am US citizen.
TLDR : Answer Summary
Yes, as a US citizen, you can enter Thailand on a visa-exempt entry for 60 days. If you travel to Singapore for a week and then return to Thailand, you'll receive a new 60-day visa-free entry stamp. You also have the option to extend your stay for 30 days at the immigration office for a fee.