Thailand
Thailand map

Region: Southeast Asia

Requirements

Passport Validity
6 months
Other Documents
Immigration officials may ask for an onward/return ticket.
Transit
- Holders of confirmed onward tickets through Bangkok Suvarnabhumi (BKK), are permitted transit without visa in international transit area for up to 12 hours. Passengers must have a connecting flight booked on the same ticket. Not applicable to all airlines: check Timaticweb for details.
- Holders of confirmed onward tickets on Thai AirAsia (FD) or Thai AirAsia X (XJ) through Bangkok Don Mueang (DMK) , are permitted transit without visa in international transit area for up to 12 hours. Passengers must have a connecting flight booked on the same ticket.
Dual Nationality
U.S. policy on dual nationality can be found here.

Additional Notes

  1. The Bureau of Consular Affairs, U.S. Department of State warns: 'Thailand’s entry/exit information is subject to change without notice.'
Sources:

COVID-19 Travel Alert: Summary

Updated: 2020-08-27
Flights Suspended, Limited entry
  1. The ban on international commercial aircraft remains.
  2. Starting July 1, exempted from the ban are international flights carrying 11 types of travellers who are now permitted to enter Thailand. But these travellers must first apply for necessary documents from Thai Embassies or consulates. The list includes: (1) Non-Thai nationals who are a spouse, parents, or children of a Thai national; (2) Non-Thai nationals who hold a valid certificate of permanent residency, or permission to take up residence; (3) Non-Thai nationals who have a work permit or have been granted permission from government agencies; (4) Non-Thai nationals who are students of educational institutions approved by Thai authorities, including the parents or guardians of the students; (5) Non-Thai nationals who are in need of medical treatment in Thailand, and their attendants. However, this shall not include medical treatment for COVID-19.
  3. A 27 August 2020 International Civil Aviation Organization (ICAO) notice amends the above list: "The types of persons permissible to enter into Thailand..are slightly amended...as follows: (7) Foreigners who hold a valid certificate of permanent residency in the Kingdom, INCLUDING THEIR SPOUSE AND CHILDREN (8) Non-Thai nationals who have work permit or have been granted permission from government agencies to work in the Kingdom, INCLUDING THEIR SPOUSE AND CHILDREN, OR FOREIGN WORKERS UNDER THE EMPLOYERS OR THE HOLDERS OF PERMIT TO BRING FOREIGNERS TO WORK IN THE KINGDOM WHO HAVE BEEN GRANTED PERMISSION FROM GOVERNMENT AGENCIES FOR TEMPORARY STAY AND WORK IN THE KINGDOM OF THOSE WORKERS"
Sources:
  1. The International Civil Aviation Organization (ICAO)
  2. "Certificate of entry from Thai embassy or consulate required for foreigners to enter Thailand"
  3. The International Civil Aviation Organization (ICAO)