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

Saturday, August 15th, 2026

5 round-trip options

Returning
Fri, Aug 21, 2026•6 Day Trip
$2,411 USD
Google Flights
Returning
Sun, Aug 23, 2026•8 Day Trip
$2,411 USD
Google Flights
Returning
Mon, Aug 24, 2026•9 Day Trip
$2,411 USD
Google Flights
Returning
Wed, Aug 26, 2026•11 Day Trip
$2,332 USD
Google Flights
Returning
Sat, Aug 29, 2026•14 Day Trip
$2,332 USD
Google Flights