Porto (OPO) to Washington (IAD) flight deal in economy from $676

Air CanadaACAir CanadaLufthansaLHLufthansaSwiss International Air LinesLXSwiss International Air LinesAustrian AirlinesOSAustrian AirlinesUnited AirlinesUAUnited Airlines
Round Trip•Economy
PortugalOPO

Francisco Sá Carneiro Airport

Porto, Portugal
United StatesIAD

Washington Dulles International Airport

Washington, United States
$739 USD
-9%$676 USD
Verified 15 days ago
Great Availability
66% of dates checked are available within 10% of the lowest price

Wednesday, December 23rd, 2026

3 round-trip options

Returning
Mon, Dec 28, 2026•5 Day Trip
$693 USD
Google Flights
Returning
Wed, Dec 30, 2026•7 Day Trip
$686 USD
Google Flights
Returning
Mon, Jan 4, 2027•12 Day Trip
$687 USD
Google Flights