Porto (OPO) to Washington (IAD) flight deal in economy from $676

Air CanadaACAir CanadaLufthansaLHLufthansaSwiss International Air LinesLXSwiss International Air LinesAustrian AirlinesOSAustrian AirlinesUnited AirlinesUAUnited Airlines
Round Trip•Economy
PortugalOPO

Francisco Sá Carneiro Airport

Porto, Portugal
United StatesIAD

Washington Dulles International Airport

Washington, United States
$739 USD
-9%$676 USD
Verified 13 days ago
Great Availability
66% of dates checked are available within 10% of the lowest price

Sunday, October 25th, 2026

4 round-trip options

Returning
Sat, Oct 31, 2026•6 Day Trip
$682 USD
Google Flights
Returning
Mon, Nov 2, 2026•8 Day Trip
$681 USD
Google Flights
Returning
Thu, Nov 5, 2026•11 Day Trip
$681 USD
Google Flights
Returning
Sat, Nov 7, 2026•13 Day Trip
$681 USD
Google Flights