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

Saturday, December 19th, 2026

3 round-trip options

Returning
Thu, Dec 24, 2026•5 Day Trip
$716 USD
Google Flights
Returning
Sat, Dec 26, 2026•7 Day Trip
$717 USD
Google Flights
Returning
Thu, Dec 31, 2026•12 Day Trip
$701 USD
Google Flights