On May 17, 2021, the UK will impose its own "traffic light" system, which will group countries into three different categories, depending on their Covid-19 risk. "Green countries" have the lowest risk and travelers coming from these countries will have to take a pre-departure test and a PCR test on or before day 2 of their arrival. Those coming from "amber countries" must quarantine for ten days but will have an option to get tested on the fifth day and end isolation if they test negative. Travelers coming from "red countries" must undergo pre-departure testing, go on 10-day isolation at a managed quarantine hotel, and get tested on days 2 and 8.

Starting on April 6, 2021, all vaccinated travelers coming from outside the Schengen Zone can enter Iceland with no restrictions. They must be able to show a vaccination certificate that shows they have received two doses of the vaccine. Those who can show proof that they had been previously infected with the virus but have since recovered can also enter with no restrictions.

The mandatory five-day self-isolation that the Italian authorities have imposed on all travelers coming from the European Union or Schengen Zone Area will be kept in place until April 30, 2021. Such preventive measure was imposed on March 31 and is supposed to last only until April 6. However, due to the rapid spread of the deadly virus, such measure has been extended until the end of this month.

The travel restrictions for visitors entering Spain coming from non-EU countries with COVID-19 mutations such as Brazil and South Africa have been extended until April 19, 2021. However, the restrictions could be extended even further if these countries cannot contain the COVID-19 virus and its mutations.

On April 18, 2021, the travel bubble between Australia and New Zealand will be restarted. This will allow Australians to travel to New Zealand with no need to quarantine. In the same way, travelers from New Zealand can also enter Australia without the need to quarantine starting on the same day.

The Tourism Minister of Greece has revealed plans to open the country for tourists on May 14, 2021. All passengers are welcome to visit, but they must present either a vaccination document or a negative result of a Covid-19 test upon their arrival. Arriving passengers will also be subjected to random medical checks.

On April 1, 2021, the quarantine requirement for all foreign visitors entering Thailand has been cut from 14 days to 10 days, except for visitors from some African countries. In addition, fully vaccinated tourists will be able to enter Phuket with no need to quarantine starting July 1, 2021. 

The Spanish authorities have lifted the restrictions imposed on visitors flying from the United Kingdom. However, they have extended the restrictions for visitors coming from South Africa and Brazil until April 13, 2021. British travelers who wish to enter Spain must present a negative result of the Covid-19 test taken no longer than 72 hours before entry. The same requirement applies to visitors coming from other European countries.

Belgium and Netherlands have recently been added to the Czech Republic’s "dark red" list of countries. Travelers coming from these countries must undergo a PCR test before entering the Czech Republic no longer than 48 hours before entry. They must submit to a second PCR test no earlier than the 5th day after entry and must stay isolated until a second negative test is received.