Update 2021-04-28: According to media reports on Wednesday (28 April), the mandatory quarantine after entering Greece has also been lifted for travellers from Australia, New Zealand, South Korea, Russia, Rwanda, Singapore and Thailand. Travellers must be able to present either proof of vaccination or a negative PCR test result no more than 72 hours old. Travellers from Russia who have been vaccinated with the vaccine Sputnik V must have been vaccinated at least 14 days before they are allowed to enter the country. In addition, the number of people entering the country from Russia is still limited.
The restrictions on air travel within the country will remain in force until at least 10 May.
