Porto (OPO) to Washington (IAD) flight deal in economy from $641

Iberia AirlinesIBIberia Airlines
Round Trip•Economy
PortugalOPO

Francisco Sá Carneiro Airport

Porto, Portugal
United StatesIAD

Washington Dulles International Airport

Washington, United States
$817 USD
-22%$641 USD
Verified 13 days ago
Good Availability
51% of dates checked are available within 10% of the lowest price

Tuesday, August 11th, 2026

5 round-trip options

Returning
Mon, Aug 17, 2026•6 Day Trip
$800 USD
Google Flights
Returning
Wed, Aug 19, 2026•8 Day Trip
$800 USD
Google Flights
Returning
Thu, Aug 20, 2026•9 Day Trip
$800 USD
Google Flights
Returning
Sat, Aug 22, 2026•11 Day Trip
$800 USD
Google Flights
Returning
Tue, Aug 25, 2026•14 Day Trip
$721 USD
Google Flights