Are there nonstop flights from Porto (OPO) to Washington (DCA)?

No. The fastest connection is via New York, about 7h 40m of total flying time.

What is the fastest connection from Porto (OPO) to Washington (DCA)?

via New York ≈ 7h 40m, via Newark ≈ 7h 41m, via Boston ≈ 7h 41m (estimated flying time, excluding layovers).

Francisco de Sá Carneiro Airport (OPO) to Ronald Reagan Washington National Airport (DCA)・5,669 km

No nonstop flights. The fastest connection is via New York (JFK), about 7h 40m of flying time (layover not included).

None.

5 one-stop options, sorted by estimated flying time. Tap one to see the airlines on each leg and booking links.

Times are estimated from distance. Check schedules, frequency and availability with the airline or a booking site.