I suspect this answer is "No" but I am wondering if I could travel to Portugal from the USA, given the following:
1. Get a PCR test just before flying, and test is negative
2. Fly from USA (Alaska, in my case) to Ireland.
3. Go thru the Mandatory 14 day quarantine in Ireland.
4. If still free of Covid, travel to Portugal from Ireland.
This may be a longshot, but I have pondered it in recent days.