Which airport is the most popular layover for flights between Washington, D.C. and Porto?

Lisbon (LIS) was the most common stop: 59% of momondo users choosing 1-stop flights on this route connected there.

How long does it take to fly to Porto?

Flight times from Washington, D.C. to Porto vary, but if you’re flying out of Washington, D.C. and flying into Porto (one of the most popular routes), then the duration is 12h 20m on average. Another popular route from Washington, D.C. to Porto is flying from Baltimore to Porto, which will take roughly 15h 52m. Keep in mind that layovers or delays could extend your travel time.

Which layover airport offers the lowest fares from Washington, D.C. to Porto?

Flights via Frankfurt am Main (FRA) offer the lowest average round-trip price of $487.

Which layover airport has the shortest connection time from Washington, D.C. to Porto?

Madrid (MAD) has the shortest average layover time for this route: 1h 05m.

What is the cheapest airline that flies from Washington, D.C. to Porto?

Air Canada, United Airlines, and British Airways are the most popular carriers operating from Washington, D.C. to Porto

What airlines fly to Porto?

TAP AIR PORTUGAL, United Airlines and Delta are the top three most popular airlines that fly to Porto from Washington, D.C. according to our data. TAP AIR PORTUGAL is the first choice among our users, with 63% of people opting to fly with this airline when traveling to Porto. Keep in mind that there are 7 different airlines that fly to Porto on a routine basis, so you have a few additional options to choose from.

Which layover airport has the shortest travel time from Washington, D.C. to Porto?

Flights connecting via Madrid (MAD) have the shortest average one-way travel time: 10h 00m.

When did momondo last update prices for flights from Washington, D.C. to Porto Airport?

Prices for flights from Washington, D.C. to Porto Airport are refreshed on a daily basis.

How many operators does momondo search for flights from Washington, D.C. to Porto Airport?

There are 7 operators available for flights from Washington, D.C. to Porto Airport as of February 2026.

How old do you have to be to fly from Washington, D.C. to Porto Airport?

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Washington, D.C. to Porto Airport.

What documentation or ID do you need to fly to Porto Airport?

The travel and health documents required for your trip to Porto Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Porto Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

$241 Cheap Flights from Washington, D.C. to Porto in 2026

Q: What is the typical price of a round-trip flight between Washington, D.C. and Porto?

Prices are currently low for flights on this route. Typical prices usually range from $581 to $724. The lowest price recently found on this route was $549.

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Find the cheapest flights from Washington, D.C. to Porto

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

10:35 pm - 8:25 pm

IAD

OPO

16h 50m

1 stop

9:15 pm - 3:10 pm

OPO

IAD

22h 55m

1 stop

$549TAP AIR PORTUGAL

Sat, Apr 18 - Sat, Apr 25

8:20 pm - 9:20 pm

IAD

OPO

20h 00m

2 stops

12:00 pm - 5:00 pm

OPO

IAD

34h 00m

2 stops

$551Multiple Airlines

Mon, Apr 13 - Wed, Apr 22

10:35 pm - 5:00 pm

IAD

OPO

13h 25m

1 stop

7:00 am - 8:05 pm

OPO

IAD

18h 05m

1 stop

$555TAP AIR PORTUGAL

Wed, Apr 8 - Sat, Apr 18

3:35 pm - 3:25 pm

BWI

OPO

18h 50m

2 stops

5:00 am - 6:17 pm

OPO

BWI

18h 17m

2 stops

$588Delta

Tue, Apr 7 - Wed, Apr 15

5:06 pm - 3:25 pm

DCA

OPO

17h 19m

2 stops

11:45 am - 10:41 pm

OPO

DCA

15h 56m

2 stops

$588Delta

Tue, Apr 7 - Wed, Apr 15

1:29 pm - 7:40 am

DCA

OPO

13h 11m

2 stops

8:20 am - 6:58 pm

OPO

DCA

15h 38m

2 stops

$595American Airlines

Sun, Apr 26 - Wed, May 6

10:55 am - 7:40 am

BWI

OPO

15h 45m

2 stops

8:20 am - 7:22 pm

OPO

BWI

16h 02m

2 stops

$597American Airlines

Tue, Apr 14 - Tue, Apr 21

6:15 am - 6:55 am

BWI

OPO

19h 40m

2 stops

9:00 am - 9:28 pm

OPO

BWI

17h 28m

2 stops

$616United Airlines

Mon, Aug 17 - Tue, Aug 25

6:15 am - 7:00 am

BWI

OPO

19h 45m

2 stops

2:25 pm - 5:29 pm

OPO

BWI

32h 04m

2 stops

$623United Airlines

Mon, Aug 17 - Wed, Aug 26

1:25 pm - 7:40 am

DCA

OPO

13h 15m

2 stops

8:20 am - 8:59 pm

OPO

DCA

17h 39m

2 stops

$625Iberia

Tue, May 5 - Tue, Oct 20

Scandinavian Airlines flights from Washington, D.C. to Porto

Our best Scandinavian Airlines deals on Washington, D.C. to Porto flight tickets

Scandinavian Airlines

Mar 16

IAD9:30 pmWashington, D.C. Dulles Intl

32h 05m

1 stop

OPO9:35 amPorto

Mar 29

OPO6:20 pmPorto

27h 40m

1 stop

IAD5:00 pmWashington, D.C. Dulles Intl

$620

Scandinavian Airlines

Mar 9

IAD12:14 pmWashington, D.C. Dulles Intl

18h 16m

2 stops

OPO10:30 amPorto

Mar 19

OPO5:00 amPorto

16h 05m

1 stop

IAD5:05 pmWashington, D.C. Dulles Intl

$753

Scandinavian Airlines

Mar 11

IAD7:05 pmWashington, D.C. Dulles Intl

16h 20m

1 stop

OPO3:25 pmPorto

Mar 18

OPO5:00 amPorto

18h 19m

2 stops

IAD7:19 pmWashington, D.C. Dulles Intl

$762

British Airways flights from Washington, D.C. to Porto

Our best British Airways deals on Washington, D.C. to Porto flight tickets

British Airways

Aug 10

BWI9:30 pmBaltimore/Washington

17h 20m

1 stop

OPO7:50 pmPorto

Aug 20

OPO9:55 amPorto

14h 45m

1 stop

BWI7:40 pmBaltimore/Washington

$631

British Airways

Apr 7

BWI9:30 pmBaltimore/Washington

17h 00m

1 stop

OPO7:30 pmPorto

Apr 21

OPO8:55 pmPorto

27h 45m

1 stop

BWI7:40 pmBaltimore/Washington

$651

British Airways

Aug 11

BWI7:25 pmBaltimore/Washington

19h 05m

1 stop

OPO7:30 pmPorto

Aug 20

OPO9:55 amPorto

14h 45m

1 stop

BWI7:40 pmBaltimore/Washington

$661

Fly from

Fly to

Route

Depart

Return

Price

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Sat 4/18

10:35 pm-8:25 pm

1 stop16h 50m

Porto

Sat 4/25

9:15 pm-3:10 pm

1 stop22h 55m

$549

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Mon 4/13

8:20 pm-9:20 pm

2 stops20h 00m

Porto

Wed 4/22

12:00 pm-5:00 pm

2 stops34h 00m

$551

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Wed 4/8

10:35 pm-5:00 pm

1 stop13h 25m

Porto

Sat 4/18

7:00 am-8:05 pm

1 stop18h 05m

$555

BaltimorePorto

BWI - OPO

BWIOPO

Baltimore/Washington

Tue 4/7

3:35 pm-3:25 pm

2 stops18h 50m

Porto

Wed 4/15

5:00 am-6:17 pm

2 stops18h 17m

$588

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

Tue 4/7

5:06 pm-3:25 pm

2 stops17h 19m

Porto

Wed 4/15

11:45 am-10:41 pm

2 stops15h 56m

$588

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

Sun 4/26

1:29 pm-7:40 am

2 stops13h 11m

Porto

Wed 5/6

8:20 am-6:58 pm

2 stops15h 38m

$595

BaltimorePorto

BWI - OPO

BWIOPO

Baltimore/Washington

Tue 4/14

10:55 am-7:40 am

2 stops15h 45m

Porto

Tue 4/21

8:20 am-7:22 pm

2 stops16h 02m

$597

BaltimorePorto

BWI - OPO

BWIOPO

Baltimore/Washington

Mon 8/17

6:15 am-6:55 am

2 stops19h 40m

Porto

Tue 8/25

9:00 am-9:28 pm

2 stops17h 28m

$616

BaltimorePorto

BWI - OPO

BWIOPO

Baltimore/Washington

Mon 8/17

6:15 am-7:00 am

2 stops19h 45m

Porto

Wed 8/26

2:25 pm-5:29 pm

2 stops32h 04m

$623

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

Tue 5/5

1:25 pm-7:40 am

2 stops13h 15m

Porto

Tue 10/20

8:20 am-8:59 pm

2 stops17h 39m

$625

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Washington, D.C. to Porto

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Layovers

Other information

What is the typical price of a round-trip flight between Washington, D.C. and Porto?

What is the cheapest month to fly to Porto?

The month of January is, on average, the cheapest month to fly to Porto from Washington, D.C., with most prices found around $539. If you aren’t able to travel during the month of January, then book flights to Porto from Washington, D.C. during October instead. Flights to Porto in October, while not as cheap as those in January, still average around $594.

How far in advance should I book a flight to Porto?

You are more likely to see cheaper flights to Porto from Washington, D.C. when booking weeks ahead of your departure date. In general, you can expect to find flights to Porto for around $721 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Porto from Washington, D.C. for as low as $618 on momondo.

Can stopping save me money on Washington, D.C. to Porto flights?

You could potentially save up to 13% on your flight if you consider stops on a Washington, D.C. to Porto flight.

How have Washington, D.C. to Porto flight prices changed over time?

When to book flights from Washington, D.C. to Porto

Are you open to changing your travel dates? Check out the ideal times to fly from Washington, D.C. to Porto according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap Washington, D.C. to Porto (WAS to OPO) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Washington, D.C. to Porto

Fastest flight time	12h 15m
Direct flights	None

The fastest flight from Washington, D.C. to Porto takes 12h 15m

There are no direct flights from Washington, D.C. to Porto. There are no popular flight routes from Washington, D.C. to Porto.

Search flight deals

How far is Washington, D.C. to Porto by plane?
The straight-line distance from Washington, D.C. to Porto is 3523.1 mi. By plane, this route typically takes 12h 15m.
When did momondo last update prices for flights from Washington, D.C. to Porto Airport?
Prices for flights from Washington, D.C. to Porto Airport are refreshed on a daily basis.
How many operators does momondo search for flights from Washington, D.C. to Porto Airport?
There are 7 operators available for flights from Washington, D.C. to Porto Airport as of February 2026.
How old do you have to be to fly from Washington, D.C. to Porto Airport?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Washington, D.C. to Porto Airport.
What documentation or ID do you need to fly to Porto Airport?
The travel and health documents required for your trip to Porto Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Porto Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.
What is the most popular airline from Washington, D.C. to Porto?
momondo data reveals that the most frequently booked airline on the route from Washington, D.C. to Porto is TAP AIR PORTUGAL, representing 42% of all bookings. The subsequent popular airlines are United Airlines at 26%, Lufthansa at 7%, and Delta at 7%.

Best airlines flying from Washington, D.C. to Porto

Compare and see reviews for airlines that fly from Washington, D.C. to Porto with momondo

Airline	Rating	Free Cancellation	Price
Delta	PriceFrom $439	Free Cancellation	Rating 7.9 8,240 reviews	Search Delta flights
SWISS	PriceFrom $444	Free Cancellation	Rating 7.5 1,885 reviews	Search SWISS flights
KLM	PriceFrom $477	Free Cancellation	Rating 7.7 1,461 reviews	Search KLM flights
TAP AIR PORTUGAL	PriceFrom $487	Free Cancellation	Rating 7.1 2,153 reviews	Search TAP AIR PORTUGAL flights
United Airlines	PriceFrom $494	Free Cancellation	Rating 7.4 9,363 reviews	Search United Airlines flights
Iberia	PriceFrom $515	Free Cancellation	Rating 7.0 3,127 reviews	Search Iberia flights
Lufthansa	PriceFrom $564	Free Cancellation	Rating 6.8 7,817 reviews	Search Lufthansa flights

Vila Nova de Gaia

Coimbra

Matosinhos

Braga

Aveiro

Esposende

Lamego

Guimarães

Pinhao

Chaves

Espinho

Arcos de Valdevez

Viseu

Ponte de Lima

Curia

Penafiel

Mesao Frio

Mira

Baiao

Why use momondo?

Why should I use momondo to find a flight deal from Washington, D.C. to Porto?

It is quick and easy to find Washington, D.C. to Porto flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Porto that suits you.

Can I find flights from Washington, D.C. to Porto with flexible booking policies on momondo?

Flights from Washington, D.C. to Porto with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Washington, D.C. to Porto?

momondo provides multiple filters to help you find the best flight to Porto from Washington, D.C.. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from Washington, D.C. to Porto right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Washington, D.C. to Porto now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Porto and let you know when they change.

An easier way to manage your Porto trip

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Cheap flights from Washington, D.C. to Porto from $241

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Washington, D.C. to Porto departing on 4/28. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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Scandinavian Airlines flights from Washington, D.C. to Porto

Our best Scandinavian Airlines deals on Washington, D.C. to Porto flight tickets

British Airways flights from Washington, D.C. to Porto

Our best British Airways deals on Washington, D.C. to Porto flight tickets

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How to get the cheapest flight ticket from Washington, D.C. to Porto

What is the typical price of a round-trip flight between Washington, D.C. and Porto?

What is the cheapest month to fly to Porto?

How far in advance should I book a flight to Porto?

Can stopping save me money on Washington, D.C. to Porto flights?

How have Washington, D.C. to Porto flight prices changed over time?

What is the cheapest airline that flies from Washington, D.C. to Porto?

What airlines fly to Porto?

Which airport is the most popular layover for flights between Washington, D.C. and Porto?

Which layover airport offers the lowest fares from Washington, D.C. to Porto?

Which layover airport has the shortest travel time from Washington, D.C. to Porto?

Which layover airport has the shortest connection time from Washington, D.C. to Porto?

How long does it take to fly to Porto?

When to book flights from Washington, D.C. to Porto

Cheap Washington, D.C. to Porto (WAS to OPO) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Washington, D.C. to Porto

Fastest flight time

Direct flights

Best airlines flying from Washington, D.C. to Porto

Compare and see reviews for airlines that fly from Washington, D.C. to Porto with momondo

Traveling to a place near Porto?

Why use momondo?

An easier way to manage your Porto trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

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