The latest update to the travel advice for Portugal said: “If you have an NHS COVID-19 Pass or an EU digital COVID-19 vaccination certificate showing you have been fully vaccinated with an EU approved COVID-19 vaccine at least 14 days before you travel, or an EU COVID-19 recovery certificate showing you have recovered from COVID-19 no less than 11 days and no more than 180 days of when you are due to travel:
“You do not need to have a COVID-19 test to enter Portugal, however some airlines have not yet updated their requirements. Check with your airline before you travel.
“Be prepared to show a digital or paper copy of your COVID-19 vaccination or recovery certificate when you check-in for your flight, and complete an online passenger locator card.”
Unvaccinated passengers will still need to present a negative COVID-19 test to enter Portugal.
Before the rules were changed, Portugal only accepted the EU vaccination certificate and a few other third country vaccination certificates but not the UK.