Thailand Lift Quarantine for Vaccinated Foreign Visitors from at least 10 Low-Risk Countries including Germany, Singapore, UK and USA from November 01, 2021.
Below is a few guideline for Thailand entry.
Travel by air from the approved countries/territories where travelers must have stayed for 21 days or more. Returning Thais and foreign residents, who previously travelled from Thailand, are exempt from this requirement.
Free to go anywhere in Thailand or leave Thailand to other countries. However, travelers are advised to follow the guidelines and measures announced by the respective province/country of their destination.