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

Lisbon (LIS) was the most common stop: 79% of momondo users choosing 1-stop flights on this route connected there.

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 $617.

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

Montreal (YUL) has the shortest average layover time for this route: 1h 53m.

What airlines fly to Porto?

TAP AIR PORTUGAL, United Airlines and Lufthansa 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 78% of people opting to fly with this airline when traveling to Porto. Keep in mind that there are 6 different airlines that fly to Porto on a routine basis, so you have a few additional options to choose from.

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

TAP AIR PORTUGAL, Iberia, and United Airlines are the most popular carriers operating from Washington, D.C. to Porto

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 11h 30m on average. Another popular route from Washington, D.C. to Porto is flying from Baltimore to Porto, which will take roughly 14h 05m. Keep in mind that layovers or delays could extend your travel time.

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

Flights connecting via Montreal (YUL) have the shortest average one-way travel time: 9h 40m.

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 6 operators available for flights from Washington, D.C. to Porto Airport as of October 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.

$212 Cheap Flights from Washington, D.C. to Porto in 2026/27

Discover deals from 900+ travel sites with momondo.

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.

12:29 pm - 11:00 amBWI Baltimore/Washington-OPO Porto

17h 31m2 stops Miami Lisbon Humberto Delgado

7:00 am - 9:12 amOPO Porto-BWI Baltimore/Washington

31h 12m3 stops Lisbon Humberto Delgado Miami San Juan Luis Munoz Marin Intl

$586Multiple Airlines

Mon, Nov 16 - Mon, Nov 23

5:25 pm - 3:00 pmIAD Washington, D.C. Dulles Intl-OPO Porto

16h 35m1 stop Lisbon Humberto Delgado

4:00 pm - 8:35 pmOPO Porto-IAD Washington, D.C. Dulles Intl

33h 35m1 stop Lisbon Humberto Delgado

$590TAP AIR PORTUGAL

Sat, Dec 5 - Sat, Dec 12

5:50 pm - 10:50 amIAD Washington, D.C. Dulles Intl-OPO Porto

12h 00m1 stop Madrid Barajas

7:35 am - 4:20 pmOPO Porto-IAD Washington, D.C. Dulles Intl

13h 45m1 stop Madrid Barajas

$590Multiple Airlines

Mon, Nov 16 - Mon, Nov 23

10:30 pm - 10:00 pmIAD Washington, D.C. Dulles Intl-OPO Porto

18h 30m1 stop Lisbon Humberto Delgado

11:00 am - 8:35 pmOPO Porto-IAD Washington, D.C. Dulles Intl

14h 35m1 stop Lisbon Humberto Delgado

$593TAP AIR PORTUGAL

Sun, Dec 6 - Sun, Dec 13

5:20 pm - 9:45 amIAD Washington, D.C. Dulles Intl-OPO Porto

11h 25m1 stop Newark

6:00 am - 7:55 pmOPO Porto-IAD Washington, D.C. Dulles Intl

18h 55m1 stop Frankfurt am Main

$713United Airlines

Wed, Apr 14 - Tue, Apr 20

5:46 pm - 9:30 amIAD Washington, D.C. Dulles Intl-OPO Porto

10h 44m1 stop Newark

6:00 am - 2:35 pmOPO Porto-IAD Washington, D.C. Dulles Intl

13h 35m1 stop Frankfurt am Main

$719United Airlines

Tue, Dec 1 - Tue, Dec 8

6:30 pm - 3:25 pmIAD Washington, D.C. Dulles Intl-OPO Porto

15h 55m2 stops New York John F Kennedy Intl Paris Charles de Gaulle

5:00 am - 3:35 pmOPO Porto-IAD Washington, D.C. Dulles Intl

15h 35m1 stop Amsterdam Schiphol

$719Delta

Wed, Apr 14 - Tue, Apr 20

12:35 pm - 8:15 amIAD Washington, D.C. Dulles Intl-OPO Porto

14h 40m1 stop New York John F Kennedy Intl

11:15 am - 3:45 pmOPO Porto-IAD Washington, D.C. Dulles Intl

33h 30m1 stop Amsterdam Schiphol

$721Delta

Sun, Dec 13 - Wed, Jan 20

10:55 pm - 11:55 pmIAD Washington, D.C. Dulles Intl-OPO Porto

20h 00m1 stop Munich Franz Josef Strauss

6:00 am - 3:55 pmOPO Porto-IAD Washington, D.C. Dulles Intl

14h 55m1 stop Frankfurt am Main

$763Lufthansa

Thu, Nov 19 - Tue, Nov 24

6:00 pm - 3:10 pmIAD Washington, D.C. Dulles Intl-OPO Porto

16h 10m1 stop Frankfurt am Main

6:00 am - 3:55 pmOPO Porto-IAD Washington, D.C. Dulles Intl

14h 55m1 stop Frankfurt am Main

$785Lufthansa

Tue, Nov 24 - Tue, Dec 1

Cheap last minute flights

Enter your travel dates to find the best prices.

9:35 pm - 6:00 pmIAD Washington, D.C. Dulles Intl-OPO Porto

16h 25m1 stop Lisbon Humberto Delgado

6:30 am - 2:40 pmOPO Porto-IAD Washington, D.C. Dulles Intl

37h 10m2 stops Barcelona-El Prat Lisbon Humberto Delgado

$677Multiple Airlines

Sat, Oct 24 - Mon, Nov 9

9:35 pm - 6:00 pmIAD Washington, D.C. Dulles Intl-OPO Porto

16h 25m1 stop Lisbon Humberto Delgado

6:30 am - 2:40 pmOPO Porto-IAD Washington, D.C. Dulles Intl

37h 10m2 stops Barcelona-El Prat Lisbon Humberto Delgado

$680Multiple Airlines

Sat, Oct 24 - Mon, Nov 9

5:05 pm - 10:50 amIAD Washington, D.C. Dulles Intl-OPO Porto

12h 45m1 stop Lisbon Humberto Delgado

12:00 pm - 9:35 pmOPO Porto-IAD Washington, D.C. Dulles Intl

13h 35m1 stop Lisbon Humberto Delgado

$727TAP AIR PORTUGAL

Sat, Oct 24 - Sun, Oct 25

5:05 pm - 10:00 amIAD Washington, D.C. Dulles Intl-OPO Porto

11h 55m1 stop Lisbon Humberto Delgado

10:30 am - 9:35 pmOPO Porto-IAD Washington, D.C. Dulles Intl

15h 05m1 stop Lisbon Humberto Delgado

$733TAP AIR PORTUGAL

Fri, Oct 23 - Sun, Oct 25

5:53 pm - 9:30 amIAD Washington, D.C. Dulles Intl-OPO Porto

11h 37m1 stop Newark

6:00 am - 10:25 pmOPO Porto-IAD Washington, D.C. Dulles Intl

21h 25m2 stops Frankfurt am Main Newark

$779United Airlines

Wed, Oct 28 - Tue, Nov 3

5:05 pm - 7:15 amDCA Washington, D.C. Reagan-National-OPO Porto

10h 10m1 stop New York John F Kennedy Intl

5:00 am - 6:37 pmOPO Porto-DCA Washington, D.C. Reagan-National

18h 37m2 stops Amsterdam Schiphol Detroit Metropolitan Wayne County

$781Delta

Wed, Oct 28 - Tue, Nov 3

12:37 pm - 10:35 amBWI Baltimore/Washington-OPO Porto

17h 58m2 stops Detroit Metropolitan Wayne County Paris Charles de Gaulle

5:00 am - 5:50 pmOPO Porto-BWI Baltimore/Washington

17h 50m2 stops Amsterdam Schiphol Boston Logan Intl

$784Delta

Wed, Oct 28 - Tue, Nov 3

3:15 pm - 11:45 amIAD Washington, D.C. Dulles Intl-OPO Porto

16h 30m2 stops Chicago O'Hare Intl Frankfurt am Main

6:00 am - 10:25 pmOPO Porto-IAD Washington, D.C. Dulles Intl

21h 25m2 stops Frankfurt am Main Newark

$797United Airlines

Wed, Oct 28 - Tue, Nov 3

12:36 pm - 9:30 amIAD Washington, D.C. Dulles Intl-OPO Porto

16h 54m1 stop Newark

6:00 am - 3:55 pmOPO Porto-IAD Washington, D.C. Dulles Intl

14h 55m1 stop Frankfurt am Main

$818Lufthansa

Wed, Oct 28 - Tue, Nov 3

12:35 pm - 11:45 amIAD Washington, D.C. Dulles Intl-OPO Porto

19h 10m2 stops Atlanta Hartsfield-Jackson Frankfurt am Main

6:00 am - 3:55 pmOPO Porto-IAD Washington, D.C. Dulles Intl

14h 55m1 stop Frankfurt am Main

$836Lufthansa

Wed, Oct 28 - Tue, Nov 3

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TAP AIR PORTUGAL flights from Washington, D.C. to Porto

Our best TAP AIR PORTUGAL deals on Washington, D.C. to Porto flight tickets

TAP AIR PORTUGAL

Jan 17

IAD10:30 pmWashington, D.C. Dulles Intl

14h 30m

1 stop

OPO6:00 pmPorto

Jan 26

OPO7:00 amPorto

12h 40m

1 stop

IAD2:40 pmWashington, D.C. Dulles Intl

$597

TAP AIR PORTUGAL

Nov 7

IAD5:25 pmWashington, D.C. Dulles Intl

11h 25m

1 stop

OPO9:50 amPorto

Nov 20

OPO8:00 pmPorto

24h 15m

1 stop

IAD3:15 pmWashington, D.C. Dulles Intl

$624

TAP AIR PORTUGAL

Nov 13

IAD10:30 pmWashington, D.C. Dulles Intl

18h 30m

1 stop

OPO10:00 pmPorto

Nov 17

OPO5:00 amPorto

14h 40m

1 stop

IAD2:40 pmWashington, D.C. Dulles Intl

$626

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

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

British Airways

Dec 2

BWI6:55 pmBaltimore/Washington

16h 55m

1 stop

OPO4:50 pmPorto

Dec 9

OPO6:40 pmPorto

27h 25m

1 stop

BWI5:05 pmBaltimore/Washington

$778

British Airways

Dec 13

BWI6:55 pmBaltimore/Washington

16h 50m

1 stop

OPO4:45 pmPorto

Jan 20

OPO6:40 pmPorto

27h 25m

1 stop

BWI5:05 pmBaltimore/Washington

$782

British Airways

Nov 3

BWI6:55 pmBaltimore/Washington

17h 55m

1 stop

OPO5:50 pmPorto

Nov 23

OPO5:35 pmPorto

28h 30m

1 stop

BWI5:05 pmBaltimore/Washington

$827

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

BaltimorePorto

BWI Baltimore/Washington - OPO Porto

BWIOPO

Baltimore/Washington

Mon 11/16

12:29 pm-11:00 am

2 stops17h 31m

Porto

Mon 11/23

7:00 am-9:12 am

3 stops31h 12m

$586

Washington, D.C.Porto

IAD Washington, D.C. Dulles Intl - OPO Porto

IADOPO

Washington, D.C. Dulles Intl

Sat 12/5

5:25 pm-3:00 pm

1 stop16h 35m

Porto

Sat 12/12

4:00 pm-8:35 pm

1 stop33h 35m

$590

Washington, D.C.Porto

IAD Washington, D.C. Dulles Intl - OPO Porto

IADOPO

Washington, D.C. Dulles Intl

Mon 11/16

5:50 pm-10:50 am

1 stop12h 00m

Porto

Mon 11/23

7:35 am-4:20 pm

1 stop13h 45m

$590

Washington, D.C.Porto

IAD Washington, D.C. Dulles Intl - OPO Porto

IADOPO

Washington, D.C. Dulles Intl

Sun 12/6

10:30 pm-10:00 pm

1 stop18h 30m

Porto

Sun 12/13

11:00 am-8:35 pm

1 stop14h 35m

$593

Washington, D.C.Porto

IAD Washington, D.C. Dulles Intl - OPO Porto

IADOPO

Washington, D.C. Dulles Intl

Wed 4/14

5:20 pm-9:45 am

1 stop11h 25m

Porto

Tue 4/20

6:00 am-7:55 pm

1 stop18h 55m

$713

Quickest round-trip

Washington, D.C.Porto

IAD Washington, D.C. Dulles Intl - OPO Porto

IADOPO

Washington, D.C. Dulles Intl

Tue 12/1

5:46 pm-9:30 am

1 stop10h 44m

Porto

Tue 12/8

6:00 am-2:35 pm

1 stop13h 35m

$719

Washington, D.C.Porto

IAD Washington, D.C. Dulles Intl - OPO Porto

IADOPO

Washington, D.C. Dulles Intl

Wed 4/14

6:30 pm-3:25 pm

2 stops15h 55m

Porto

Tue 4/20

5:00 am-3:35 pm

1 stop15h 35m

$719

Washington, D.C.Porto

IAD Washington, D.C. Dulles Intl - OPO Porto

IADOPO

Washington, D.C. Dulles Intl

Sun 12/13

12:35 pm-8:15 am

1 stop14h 40m

Porto

Wed 1/20

11:15 am-3:45 pm

1 stop33h 30m

$721

Washington, D.C.Porto

IAD Washington, D.C. Dulles Intl - OPO Porto

IADOPO

Washington, D.C. Dulles Intl

Thu 11/19

10:55 pm-11:55 pm

1 stop20h 00m

Porto

Tue 11/24

6:00 am-3:55 pm

1 stop14h 55m

$763

Washington, D.C.Porto

IAD Washington, D.C. Dulles Intl - OPO Porto

IADOPO

Washington, D.C. Dulles Intl

Tue 11/24

6:00 pm-3:10 pm

1 stop16h 10m

Porto

Tue 12/1

6:00 am-3:55 pm

1 stop14h 55m

$785

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?

Prices are currently low for flights on this route.

Typical prices usually range from $750 to $956.
The lowest price recently found on this route was $586.

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 $585. If you aren’t able to travel during the month of January, then book flights to Porto from Washington, D.C. during February instead. Flights to Porto in February, while not as cheap as those in January, still average around $681.

How far in advance should I book a flight from Washington, D.C. 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 $867 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 $608 on momondo.

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

You could potentially save up to 11% 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

Best Price Found	$212
Fastest flight time	10h 35m
Direct flights	None

The best one-way flight to Porto from Washington, D.C. in the past 72 hours is $212. The best round-trip flight deal from Washington, D.C. to Porto found on momondo in the last 72 hours is $586.

The fastest flight from Washington, D.C. to Porto takes 10h 35m

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

Frequently asked questions about flying from Washington, D.C. to Porto

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 10h 35m.
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 6 operators available for flights from Washington, D.C. to Porto Airport as of October 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 68% of all bookings. The subsequent popular airlines are United Airlines at 18%, Lufthansa at 6%, and Delta at 3%.

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
KLM	PriceFrom $477	Free Cancellation	Rating 7.8 1,592 reviews	Search KLM flights
TAP AIR PORTUGAL	PriceFrom $504	Free Cancellation	Rating 7.2 2,384 reviews	Search TAP AIR PORTUGAL flights
Lufthansa	PriceFrom $514	Free Cancellation	Rating 6.8 8,288 reviews	Search Lufthansa flights
United Airlines	PriceFrom $641	Free Cancellation	Rating 7.3 10,405 reviews	Search United Airlines flights
Air France	PriceFrom $642	Free Cancellation	Rating 7.5 1,653 reviews	Search Air France flights
Delta	PriceFrom $692	Free Cancellation	Rating 7.8 8,664 reviews	Search Delta flights

Coimbra

Braga

Vila Nova de Gaia

Aveiro

Pinhao

Matosinhos

Esposende

Chaves

Viseu

Espinho

Arcos de Valdevez

Guimarães

Lamego

Ponte de Lima

Caminha

Penafiel

Mira

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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Faro Airport

Lisbon Humberto Delgado Airport

Azores Airport

Madeira Airport

Algarve Airport

Cheap flights from Washington, D.C. to Porto from $212

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 11/30. 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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TAP AIR PORTUGAL flights from Washington, D.C. to Porto

Our best TAP AIR PORTUGAL 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 from Washington, D.C. 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

Best Price Found

Fastest flight time

Direct flights

Frequently asked questions about flying from Washington, D.C. to Porto

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.

Get notified when prices go down

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Find better results for your trip to Portugal

Airports servicing Portugal

Fly your favorite airline to Porto

Airlines are sorted and displayed according to clicks in the past 7 days on momondo

Cabin classes currently available on flights to Porto

List of cabin classes available on flights landing in Porto. Availability may vary depending on flight origin and airline.

Popular cities in Portugal

Popular flights according to clicks in the last 7 days on momondo

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According to popular flight searches on momondo this year

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