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

Thursday, October 22nd, 2026

7 round-trip options

Returning
Tue, Oct 27, 2026•5 Day Trip
$688 USD
Google Flights
Returning
Wed, Oct 28, 2026•6 Day Trip
$641 USD
Google Flights
Returning
Thu, Oct 29, 2026•7 Day Trip
$641 USD
Google Flights
Returning
Fri, Oct 30, 2026•8 Day Trip
$641 USD
Google Flights
Returning
Sun, Nov 1, 2026•10 Day Trip
$836 USD
Google Flights
Returning
Mon, Nov 2, 2026•11 Day Trip
$641 USD
Google Flights
Returning
Tue, Nov 3, 2026•12 Day Trip
$642 USD
Google Flights