The rules for entry into Thailand change often, and it can be very difficult to keep track of the fine details. I have found the guide to the IATA member airlines on the rules that must be followed to be extremely useful. They are usually accurate and can be shown to airline staff in the event of trouble checking in. However, finding the up to date version of these online (especially well formatted) is not easy for those without an IATA subscription. Below, I post the rules as updated on 13th January 2022

 

Quote

Published 13.01.2022

1. Until 31 January 2022, passengers and airline crew are not allowed to enter and transit.
    This does not apply to:
   - nationals and residents of Thailand;
   - passengers who are spouses, parents or children of a national of Thailand;
   - airline crew with a return scheduled flight;
   - passengers who are visa exempt;
   - passengers with a visa issued by Thailand;
   - nationals of Australia, China (People's Rep.), Japan, Korea (Rep.), Malaysia, New Zealand, Singapore and Viet Nam with an APEC Business Travel Card arriving from the country that issued the APEC Business Travel Card;
   - passengers with a Chinese Taipei (on the cover: Republic of China Taiwan) passport with an APEC Business Travel Card arriving from the country that issued the APEC Business Travel Card;
   - residents of Hong Kong (SAR China) with an APEC Business Travel Card arriving from Hong Kong (SAR China);
   - students;
   - passengers transiting through Bangkok (BKK);
   - passengers traveling to Phuket (HKT) or Ko Samui (USM).

 

2. Passengers must have a Thailand Pass QR code obtained at https://tp.consular.go.th

 

3. Passengers entering Thailand must have a negative COVID-19 RT-PCR test result issued at most 72 hours before departure from the first embarkation point. The test result must be in English or Thai;
    This does not apply to:
   - nationals of Thailand traveling under the Alternative Quarantine (AQ) scheme;
   - passengers younger than 6 years;
   - passengers with a positive COVID-19 RT-PCR test result issued at most 72 hours before departure from the first embarkation point, and a COVID-19 recovery certificate issued at least 15 days and at most 3 months before arrival.

 

4. Passengers entering Thailand must have a COVID-19 vaccination certificate showing that they were fully vaccinated with AstraZeneca (Vaxzevria), Covaxin, Covishield, Janssen, Moderna (Spikevax), Pfizer-BioNTech (Comirnaty), Sinopharm, Sinovac or Sputnik V at least 14 days before departure;
    This does not apply to:
   - passengers traveling under the Alternative Quarantine (AQ) scheme;
   - passengers younger than 12 years;

   - passengers younger than 18 years traveling under the Sandbox program with their fully-vaccinated parents/guardians;
   - passengers between 12 and 17 years with a COVID-19 vaccination certificate showing that they received one dose of AstraZeneca (Vaxzevria), Covaxin, Covishield, Janssen, Moderna (Spikevax), Pfizer-BioNTech (Comirnaty), Sinopharm, Sinovac or Sputnik V;
   - passengers with a recovery certificate and a COVID-19 vaccination certificate showing that they received at least one dose of AstraZeneca (Vaxzevria), Covaxin, Covishield, Janssen, Moderna (Spikevax), Pfizer-BioNTech (Comirnaty), Sinopharm, Sinovac or Sputnik V at least 14 days before departure.

 

5. Passengers entering or transiting through Thailand must have medical insurance with minimum coverage of USD 50,000.
    This does not apply to:
   - nationals of Thailand;
   - passengers transiting without disembarking the aircraft.

 

6. Passengers traveling under the Test & Go scheme must:
   - arrive from, or in the past 21 days have only been in Australia, Austria, Bahrain, Belgium, Bhutan, Brunei Darussalam, Bulgaria, Cambodia, Canada, Chile, China (People's Rep.), Croatia, Cyprus, Czechia, Denmark, Estonia, Finland, France, Germany, Greece, Hong Kong (SAR China), Hungary, Iceland, India, Ireland (Rep.), Israel, Italy, Japan, Korea (Rep.), Kuwait, Lao People's Dem. Rep., Latvia, Lithuania, Malaysia, Maldives, Malta, Mongolia, Myanmar, Nepal, Netherlands, New Zealand, Norway, Oman, Philippines, Poland, Portugal, Qatar, Romania, Saudi Arabia, Singapore, Slovakia, Slovenia, Spain, Sri Lanka, Sweden, Switzerland, USA, United Arab Emirates, United Kingdom or Viet Nam; 
   and
   - have a hotel reservation for 1 night at AQ, OQ, or SHA+ hotel obtained at www.thailandsha.com or asq.in.th

 

7. Passengers traveling under the Sandbox Program scheme must:
   - arrive at Phuket (HKT) or Ko Samui (USM); 
   and
   - have a hotel reservation for 7 nights at SHA+ hotel obtained at www.thailandsha.com and proof of payment for COVID-19 tests.
    They are subject to quarantine for 7 days.

 

8. Passengers traveling under the Alternative Quarantine (AQ) scheme must have proof of payment for COVID-19 tests; and
   - a hotel reservation at AQ, OQ or AHQ hotel obtained at www.thailandsha.com and asq.in.th
     - - for 7 nights if they were fully vaccinated with AstraZeneca (Vaxzevria), Covaxin, Covishield, Janssen, Moderna (Spikevax), Pfizer-BioNTech (Comirnaty), Sinopharm, Sinovac or Sputnik V at least 14 days before departure; or
     - - for 10 nights if they are not fully vaccinated.

 

9. Passengers transiting through Thailand must have:
   - a negative COVID-19 RT-PCR test result issued at most 72 hours before departure from the first embarkation point. The test result must be in English or Thai; or
   - a COVID-19 vaccination certificate showing that they were fully vaccinated with AstraZeneca (Vaxzevria), Covaxin, Covishield, Janssen, Moderna (Spikevax), Pfizer-BioNTech (Comirnaty), Sinopharm, Sinovac or Sputnik V at least 14 days before departure.
   This does not apply to:
   - passengers transiting without disembarking the aircraft.
   - passengers younger than 6 years;
   - passengers younger than 12 years travelling with a fully vaccinated parent/guardian.

 

10. Airline crew are subject to self-isolation until their next flight.

 

11. Airline crew staying overnight must have a guarantee letter from the airline or health insurance certificate with a coverage cost of at least USD 50,000.

 

© International Air Transport Association (IATA) 2022. All rights reserved.

I extracted this information from https://www.iatatravelcentre.com/world.php where the latest information can be found (in a less digestible form) by clicking inside Thailand on the provided map.

The info is not updated fast enough and the search function hard to use.

 

https://www.iatatravelcentre.com/passport-visa-health-travel-document-requirements.htm

 

Last month when Test and Go applications were suspended the site had yet to be updated  with any info about test and go at all.

42 minutes ago, Captain Monday said:

The info is not updated fast enough and the search function hard to use.

 

https://www.iatatravelcentre.com/passport-visa-health-travel-document-requirements.htm

 

Last month when Test and Go applications were suspended the site had yet to be updated  with any info about test and go at all.

That page is more convenient to use but, as you said, is not updated as quickly as the information for member airlines. It is also not quite as comprehensive. The need to enter a lot of information into the form before it shows the rules is irritating, but bearable.