Washington (IAD) to Porto (OPO) flight deal from $438 USD in economy class

ACAir Canada

LHLufthansa

LXSwiss International Air Lines

Washington Dulles International Airport

Washington, United States

OPO

Francisco Sá Carneiro Airport

Porto, Portugal

$756 USD

-42%$438 USD

Verified Nov 30, 2025 at 9:02 PM

January 2026

Today

Mon

Tue

Wed

Thu

Fri

Sat

Sun

29$533 30$486 31$460 1$498 2$834 3$811 4$695 5$622 6$482 7$471 8$485 9$477 10$473 11$462 12$447 13$447 14$447 15$485 16$500 17$485 18$447 19$447 20$447 21$447 22$485 23$485 24$454 25$447 26$447 27$447 28$447 29$485 30$504 31$485 1

Limited Availability

12% of dates checked are available within 10% of the lowest price

Friday, January 9th, 2026

10 round-trip options

Returning

Wed, Jan 14, 2026•5 Day Trip

$511 USD

Google Flights

Returning

Thu, Jan 15, 2026•6 Day Trip

$507 USD

Google Flights

Returning

Fri, Jan 16, 2026•7 Day Trip

$507 USD

Google Flights

Returning

Sat, Jan 17, 2026•8 Day Trip

$521 USD

Google Flights

Returning

Sun, Jan 18, 2026•9 Day Trip

$517 USD

Google Flights

Returning

Mon, Jan 19, 2026•10 Day Trip

$477 USD

Google Flights

Returning

Tue, Jan 20, 2026•11 Day Trip

$507 USD

Google Flights

Returning

Wed, Jan 21, 2026•12 Day Trip

$497 USD

Google Flights

Returning

Thu, Jan 22, 2026•13 Day Trip

$497 USD

Google Flights

Returning

Fri, Jan 23, 2026•14 Day Trip

$536 USD

Google Flights