Washington (IAD) to Porto (OPO) flight deal in economy from $345

Air CanadaACAir CanadaLufthansaLHLufthansaSwiss International Air LinesLXSwiss International Air LinesAustrian AirlinesOSAustrian AirlinesUnited AirlinesUAUnited Airlines
One Way•Economy
United StatesIAD

Washington Dulles International Airport

Washington, United States
PortugalOPO

Francisco Sá Carneiro Airport

Porto, Portugal
$459 USD
-25%$345 USD
Verified 1 day ago
Fair Availability
36% of dates checked are available within 10% of the lowest price

Tuesday, October 13th, 2026

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