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

Friday, December 18th, 2026

3 round-trip options

Returning
Wed, Dec 23, 2026•5 Day Trip
$709 USD
Google Flights
Returning
Fri, Dec 25, 2026•7 Day Trip
$693 USD
Google Flights
Returning
Wed, Dec 30, 2026•12 Day Trip
$686 USD
Google Flights