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Washington (IAD) to Porto (OPO) flight deal in economy from $345
AC
Air Canada
LH
Lufthansa
LX
Swiss International Air Lines
OS
Austrian Airlines
UA
United Airlines
One Way
•
Economy
IAD
Washington Dulles International Airport
Washington, United States
OPO
Francisco Sá Carneiro Airport
Porto, Portugal
$444 USD
-22%
$345
USD
Verified 5 minutes ago
July 2026
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Fair Availability
39% of dates checked are available within 10% of the lowest price
Thursday, July 9th, 2026
No flight details available for this date.
IAD
OPOIADOPOIADOPO