Washington (IAD) to Porto (OPO) flight deal in economy from $739
IADWashington Dulles International Airport
Washington, United States
OPOFrancisco Sá Carneiro Airport
Porto, Portugal
$1,088 USD
-32%$739 USD
Verified 13 days agoSeptember 2026
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Limited Availability
19% of dates checked are available within 10% of the lowest price
Saturday, September 5th, 2026
5 round-trip options
Returning
Fri, Sep 11, 2026•6 Day Trip
$1,238 USD
Returning
Sun, Sep 13, 2026•8 Day Trip
$1,102 USD
Returning
Mon, Sep 14, 2026•9 Day Trip
$1,181 USD
Returning
Wed, Sep 16, 2026•11 Day Trip
$986 USD
Returning
Fri, Sep 18, 2026•13 Day Trip
$986 USD