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

Sunday, August 23rd, 2026

5 round-trip options

Returning
Sat, Aug 29, 2026•6 Day Trip
$1,121 USD
Google Flights
Returning
Mon, Aug 31, 2026•8 Day Trip
$1,012 USD
Google Flights
Returning
Tue, Sep 1, 2026•9 Day Trip
$1,012 USD
Google Flights
Returning
Thu, Sep 3, 2026•11 Day Trip
$1,012 USD
Google Flights
Returning
Sun, Sep 6, 2026•14 Day Trip
$1,012 USD
Google Flights