The government on Friday outlined conditions for quarantine-free entry from Nov 1 for arrivals by air from 46 countries, which also apply to people who recently left Thailand for those countries.
It also gave details for arrivals under other criteria.
Apisamai Srirangson, a spokeswoman for the Centre for Covid-19 Situation Administration, said on Nov 1 Thailand would end quarantine for fully vaccinated arrivals from Australia, Austria, Bahrain, Belgium, Bhutan, Brunei, Bulgaria, Cambodia, Canada, Chile, China, Cyprus, Czech, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Israel, Italy, Japan, Latvia, Lithuania, Malaysia, Malta, the Netherlands, New Zealand, Norway, Poland, Portugal, Qatar, Saudi Arabia, Singapore, Slovenia, South Korea, Spain, Sweden, Switzerland, the United Arab Emirates, the United Kingdom, the United States and Hong Kong.
Visitors from any of these countries must be fully vaccinated and have stayed in that country for at least 21 days prior to departure, she said.
They must have received their second Covid-19 vaccine dose at least 14 days before their flight to Thailand.
They must have an RT-PCR test that returns negative for Covid-19 no more than 72 hours before their flight. They must also have general health insurance cover of at least US$50,000.
Upon arrival, visitors will be given another RT-PCR test and can travel on without quarantine if the test returns negative. Pending the result, they must stay one night at one of specified hotels.
They must download application software that will track their whereabouts.
Thai nationals who had earlier left Thailand to visit any of the 46 countries, but stayed there less than 21 days will not be quarantined and will not be required to have health insurance cover of $50,000, Dr Apisamai said. However, expats who have stayed in one of the 46 countries for less than 21 days will have to provide proof of $50,000 in coverage on their return.
The no-quarantine measures apply to arrivals by flights at Suvarnabhumi, Don Mueang, Chiang Mai, Phuket, Samui, U-Tapao airports and chartered flights at Buri Ram airport. They will be able to travel to all 77 provinces.
Those arriving from places other than the 46 on the eligible list will be limited to entering "sandbox" programmes in 17 provinces, among them Phuket, Koh Samui, Koh Phangnga and Krabi.
They must be fully vaccinated, have health insurance of at lest $50,000, and reserve accommodation for seven days at standard hotels in sandbox areas, and their RT-PCR tests must also have returned negative no more than 72 hours before their flight.
These arrivals will be retested for Covid-19 upon arrival and on day 6 or 7 afterwards, before leaving their sandbox zones. If the first test returns negative upon arrival, visitors can tour sandbox areas.
As of Nov 1, arrivals from abroad will not need a Certificate of Entry (CoE), but if they have already obtained one it will still be valid. Instead, they can apply online for a Thailand Pass QR code to show on arrival.
The people who have not been vaccinated, received only one dose, had the second jab less than 14 days before their flight, or arrive from countries other than the 46 designated ones will be quarantined at specified places, including hospitals for foreign patients seeking medical treatment in Thailand.
They will be tested on arrival and again before the end of their quarantine.
The measures were subject to change, depending on the Covid-19 situation, Dr Apisamai said.