I have a question that I believe is simple but I have yet to get the same answer from a number of different sources. Next month we are on the Douro River trip starting in Lisbon. The question is...when do we get our Covid test? All say 72 hours before. Some sources say 72 hours before boarding your flight from your original airport--for us, Washington DC. Others say 72 hours before boarding your connecting flight to fly to Lisbon--for us Frankfort. Tauck, Lufthansa, and our travel agent (none of them new to us) have all given different information. Anyone who has traveled overseas recently provide any information based on experience? Many thanks.