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 2nd, 2026

5 round-trip options

Returning
Sat, Aug 8, 2026•6 Day Trip
$1,247 USD
Google Flights
Returning
Mon, Aug 10, 2026•8 Day Trip
$1,045 USD
Google Flights
Returning
Tue, Aug 11, 2026•9 Day Trip
$930 USD
Google Flights
Returning
Thu, Aug 13, 2026•11 Day Trip
$1,009 USD
Google Flights
Returning
Sun, Aug 16, 2026•14 Day Trip
$1,009 USD
Google Flights