Porto flights back to US

I think the 2.5 hour layover at CDG will be fine. We took the Heart of Portugal tour last year. We flew home on a Delta flight on the day that the tour ended. I don't know what home airport you're flying into. Ours was ORD. We hadn't been able to get a non-stop from Porto to O'Hare, of course, since the only non-stop flights are from Delta's hub cities (CDG, AMS). We chose a flight that was leaving OPO at 9:15, with a 3 hour layover at CDG prior to the flight to ORD. Then a couple of months prior to travel, Delta moved the CDG-ORD leg up and we were left with just a one and a half hour layover at CDG, which made me uncomfortable. I contacted Delta and they wanted to move our OPO-CDG leg up to 5:45 a.m. but I objected to that. Instead, we kept the 9:15 flight out of OPO but got put on a later flight out of CDG, not to ORD but to our actual home airport of MKE, with a plane change in Detroit. (As an aside, the couple of hours in Detroit was okay with us because it saved us a couple hour bus ride from Chicago to Milwaukee. We were very happy with our new flight arrangements. When Delta makes a flight change like that, it is usually very willing to work with the traveler to find something more workable for them. I've found that the trick is to have a couple things in mind to propose, best choice, next best choice, etc.)

To take that 9:15 a.m. flight out of OPO, we of course had to miss the tour's final breakfast. The hotel suggested we have our cab arrive at 6 a.m., and that was fine. There was no traffic of any kind in Porto at that time of the morning and we were at the airport in no time. Check in was super easy and we had a ton of time to wait in our gate. Then the flight left late, perhaps 45 minutes or so late. Things went super smoothly at CDG, no lines of any kind, plenty of time to catch our flight to Detroit. But because we got there late, we WOULD have missed the flight to ORD if we'd stuck with it. By the time we got to our gate for the Detroit flight, we could see that our original flight, to Chicago, had not yet left. However, the gate was closed. My take-away lesson was to never accept an hour and a half layover at CDG. It would have been a problem . . . but only because our flight from OPO got in late. Two and a half hours at CDG should be plenty of time and even allow for the first flight to be late.

If your airline is comfortable booking your flights with their connection, book the flights. They’ll get you back home.

Thank you so much. That is really helpful.

In April, we flew out of Porto on United to Munich. Short layover then direct flight to San Francisco. Otherwise, on United it was a flight to Newark with a 5 hour layover.

Check to see what flights British Airways has. You fly from Porto to Heathrow, then connect to a U.S. bound flight.