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 15 days ago
Great Availability
66% of dates checked are available within 10% of the lowest price

Thursday, December 10th, 2026

3 round-trip options

Returning
Tue, Dec 15, 2026•5 Day Trip
$705 USD
Google Flights
Returning
Thu, Dec 17, 2026•7 Day Trip
$947 USD
Google Flights
Returning
Tue, Dec 22, 2026•12 Day Trip
$749 USD
Google Flights