I can not find much information that is concrete so I am reaching out to the community for help if anyone has a clear answer.
I am spending 8/16-8/21 in Spain before going to Italy 8/21-8/29 for an important wedding. We are both fully vaccinated and plan to continue to take all precautions for masks and being outside etc.
Currently our flight goes from Seattle direct to London Heathrow then onto Madrid. After a few days we will fly to Rome for the remainder of our trip. Does anyone have a clear answer about needing to quarantine in Italy for 5 days or are we ok because we stay "airside" in Heathrow and never actually enter the country. It is just not completely clear anywhere online that I can find. https://www.gov.uk/foreign-travel-advice/italy/entry-requirements
Our current flight is refundable but I used American miles and of course a different flight to Madrid by way of a US city which would avoid Heathrow is not available anymore at the mile level I booked at 30k pp! I called American Airlines and they would not move to the Seattle --> Dallas --> Madrid flight so I am in a pickle! My only other option to avoid Heathrow is paying cash for the one way ticket or using Chase points which I was hoping to avoid -- Any help of a link that will clear this up or guidance would be appreciated.