The Portuguese authorities have declared that British tourists will be able to enter the country starting next Monday.
From that point forward, Portugal is on the UK's "green" list for unrestricted travel, but it was unclear if the Portuguese would reciprocate.
The coronavirus continues to be a source of concern in Portugal, which has prolonged its state of calamity until May 30.
Anyone arriving in Lisbon will be required to take a negative PCR test before leaving.
The announcement was made by the Portuguese foreign ministry, which said that tourism authorities have been working to ensure that testing capability in Portugal meets tourist demand.