The VISA EXEMPTION RULE allows tourists from 64 countries to enter Thailand without a visa. You can check your eligibility and apply online here.
Traveling during Covid-19
At the time of registrations opening for Thailand by UTMB® 2021 in April 2021, all travelers need to obtain a Certificate of Entry (COE) in order to enter Thailand and are subject to a 14-day quarantine at a state-approved facility. However, the government has recently lifted restrictions imposed during the second wave of the virus in late December and has continuously implemented several new quarantine schemes for tourists, such as golf quarantine, villa quarantine and organization quarantine (ie. for 3 badminton world tours etc.).
From November 1, 2021, Thailand opens the country and welcome fully vaccinated visitors from 63 countries. Travelers are welcome to choose from the 17 ‘Blue Zone’ destinations, up from currently 4 ‘Sandbox’ destinations, for their first 7-night mandatory stay within the destination before being able to move on to other parts of Thailand. (more info https://bit.ly/3pV8bkH)
63 countries are : 1. Australia 2. Austria 3. Bahrain 4. Belgium 5. Bhutan 6. Brunei Darussalam 7. Bulgaria 8. Cambodia 9. Canada 10. Chile 11. China 12. Croatia 13. Cyprus 14. Czech Republic 15. Denmark 16. Estonia 17. Finland 18. France 19. Germany 20. Greece 21. Hungary 22. Iceland 23. India 24. Indonesia 25. Ireland 26. Israel 27. Italy 28. Japan 29. Kuwait 30. Laos 31. Latvia 32. Lithuania 33. Luxembourg 34. Malaysia 35. Maldives 36. Malta 37. Mongolia 38. Myanmar 39. Nepal 40. Netherlands 41. New Zealand 42. Norway 43. Oman 44. Philippines 45. Poland 46. Portugal 47. Qatar 48. Romania 49. Saudi Arabia 50. Singapore 51. Slovak Republic 52. Slovenia 53. Sri Lanka 54. South Korea 55. Spain 56. Sweden 57. Switzerland 58. United Arab Emirates 59. United Kingdom 60. United States 61. Vietnam 62. Hong Kong 63. Taiwan
Thailand Pass will replace the CoE (certificate of entry) system and facilitate the filing of an immigration for Thais and foreigners who wish to enter the country through an airport.
Updated Thailand quarantine rules can be found here.
There are many international airports in Thailand within comfortable traveling distance to the event venue, including Suvarnabhumi Airport (BKK), Don Mueang International Airport (DMK) and Chiang Mai International Airport (CNX). You can see which airlines fly to these airports in the following table.