score:2
International flights are resuming from June 4, and for Portugal mainland quarantine is no more required.
https://www.cntraveler.com/story/flights-to-portugal-from-the-us-will-resume-june-4 (mirror 1, mirror 2):
As destinations all over the world continue to ease coronavirus-related restrictions, restaurants, resorts, and air routes are slowly reopening. On June 4, Portugal’s national airline, TAP Air Portugal, will resume its nonstop flight between Lisbon and Newark airport, following the completion of the country’s three-phase reopening strategy. On June 6, Portugal will formally allow E.U. nations, except Spain and Italy, to enter via air. Travelers to mainland Portugal will not be required to quarantine, but stricter measures are in place for those visiting the Azores and Madeira.
Obviously things can change in case of a second covid-19 wave.
Upvote:1
Caveat: As you said, getting the straight scoop on this is not easy, and is rapidly changing.
As of July 2020:
Portugal had re-opened tourist (“non-essential”) travel from the US in May-June 2020, but that has been stopped in July 2020.
Tourist (“non-essential”) travel from some countries other than the US has resumed:
If you are a US citizen, see:
They say:
This is a fast-changing situation. I get the feeling that even these official web sites may not be up-to-date.