What is the cheapest airline that flies from District of Columbia to Porto?

TAP AIR PORTUGAL, United Airlines, and Delta are the most popular carriers operating from District of Columbia to Porto

What airlines fly to Porto?

TAP AIR PORTUGAL, United Airlines and Lufthansa are the top three most popular airlines that fly to Porto from District of Columbia according to our data. TAP AIR PORTUGAL is the first choice among our users, with 77% of people opting to fly with this airline when traveling to Porto. Keep in mind that there are 5 different airlines that fly to Porto on a routine basis, so you have a few additional options to choose from.

When did momondo last update prices for flights from District of Columbia to Porto Airport?

Prices for flights from District of Columbia to Porto Airport are updated daily.

How many operators does momondo search for flights from District of Columbia to Porto Airport?

As of November 2026, there are 5 operators available to choose from for flights from District of Columbia to Porto Airport.

How old do you have to be to fly from District of Columbia to Porto Airport?

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from District of Columbia to Porto Airport.

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

The necessary travel and health documents for your Porto Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

$217 Cheap Flights from District of Columbia to Porto in 2026/27

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from District of Columbia to Porto

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

5:25 pm - 6:00 pmIAD Washington, D.C. Dulles Intl-OPO Porto

19h 35m1 stop Lisbon Humberto Delgado

8:30 am - 3:15 pmOPO Porto-IAD Washington, D.C. Dulles Intl

11h 45m1 stop Lisbon Humberto Delgado

$574TAP AIR PORTUGAL

Thu, Feb 4 - Thu, Feb 11

5:25 pm - 10:00 amIAD Washington, D.C. Dulles Intl-OPO Porto

11h 35m1 stop Lisbon Humberto Delgado

5:00 am - 2:40 pmOPO Porto-IAD Washington, D.C. Dulles Intl

14h 40m1 stop Lisbon Humberto Delgado

$586TAP AIR PORTUGAL

Thu, Feb 11 - Tue, Feb 16

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

18h 30m2 stops Lisbon Humberto Delgado Madrid Barajas

8:35 pm - 2:40 pmOPO Porto-IAD Washington, D.C. Dulles Intl

23h 05m2 stops Madrid Barajas Lisbon Humberto Delgado

$605Multiple Airlines

Fri, Feb 12 - Mon, Feb 15

5:25 pm - 8:10 amIAD Washington, D.C. Dulles Intl-OPO Porto

33h 45m3 stops Lisbon Humberto Delgado Madrid Barajas Barcelona-El Prat

6:25 am - 8:30 pmOPO Porto-IAD Washington, D.C. Dulles Intl

19h 05m2 stops Madrid Barajas Lisbon Humberto Delgado

$610Multiple Airlines

Mon, Jan 18 - Wed, Jan 27

5:20 pm - 9:30 amIAD Washington, D.C. Dulles Intl-OPO Porto

12h 10m1 stop Newark

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

18h 55m1 stop Frankfurt am Main

$724United Airlines

Tue, Mar 23 - Tue, Mar 30

6:40 pm - 10:00 pmIAD Washington, D.C. Dulles Intl-OPO Porto

22h 20m1 stop Paris Charles de Gaulle

11:15 am - 3:55 pmOPO Porto-IAD Washington, D.C. Dulles Intl

33h 40m1 stop Amsterdam Schiphol

$726Delta

Wed, Feb 17 - Tue, Feb 23

4:00 pm - 10:35 amIAD Washington, D.C. Dulles Intl-OPO Porto

14h 35m2 stops Atlanta Hartsfield-Jackson Paris Charles de Gaulle

5:00 am - 3:30 pmOPO Porto-IAD Washington, D.C. Dulles Intl

15h 30m1 stop Amsterdam Schiphol

$729Delta

Tue, Mar 23 - Tue, Mar 30

1:00 pm - 9:45 amDCA Washington, D.C. Reagan-National-OPO Porto

15h 45m1 stop Newark

12:00 pm - 10:33 pmOPO Porto-DCA Washington, D.C. Reagan-National

15h 33m2 stops Frankfurt am Main Toronto Pearson Intl

$731United Airlines

Mon, Apr 12 - Thu, Apr 15

6:40 pm - 10:35 amIAD Washington, D.C. Dulles Intl-OPO Porto

10h 55m1 stop Paris Charles de Gaulle

5:00 am - 4:44 pmOPO Porto-IAD Washington, D.C. Dulles Intl

16h 44m2 stops Amsterdam Schiphol Detroit Metropolitan Wayne County

$745KLM

Wed, Jan 27 - Wed, Feb 3

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

14h 40m1 stop New York John F Kennedy Intl

5:00 am - 3:55 pmOPO Porto-IAD Washington, D.C. Dulles Intl

15h 55m1 stop Amsterdam Schiphol

$776KLM

Fri, Dec 4 - Fri, Dec 11

Cheap last minute flights

Enter your travel dates to find the best prices.

5:25 pm - 10:00 amIAD Washington, D.C. Dulles Intl-OPO Porto

11h 35m1 stop Lisbon Humberto Delgado

8:30 pm - 7:05 pmOPO Porto-IAD Washington, D.C. Dulles Intl

27h 35m2 stops Sevilla Casablanca Mohamed V

$690Multiple Airlines

Thu, Nov 12 - Sat, Nov 21

5:25 pm - 1:30 pmIAD Washington, D.C. Dulles Intl-OPO Porto

15h 05m1 stop Lisbon Humberto Delgado

6:10 am - 8:23 pmOPO Porto-IAD Washington, D.C. Dulles Intl

19h 13m3 stops Faro Toronto Pearson Intl Montreal Pierre Elliott Trudeau Intl

$802Multiple Airlines

Thu, Nov 12 - Sat, Nov 21

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

18h 35m1 stop Lisbon Humberto Delgado

6:00 pm - 2:40 pmOPO Porto-IAD Washington, D.C. Dulles Intl

25h 40m1 stop Lisbon Humberto Delgado

$803TAP AIR PORTUGAL

Thu, Nov 12 - Mon, Nov 16

8:10 pm - 11:15 amIAD Washington, D.C. Dulles Intl-OPO Porto

34h 05m1 stop Zurich

6:15 am - 8:05 pmOPO Porto-IAD Washington, D.C. Dulles Intl

18h 50m1 stop Munich Franz Josef Strauss

$821Multiple Airlines

Fri, Nov 13 - Fri, Nov 27

6:40 pm - 10:35 amIAD Washington, D.C. Dulles Intl-OPO Porto

10h 55m1 stop Paris Charles de Gaulle

5:00 am - 3:55 pmOPO Porto-IAD Washington, D.C. Dulles Intl

15h 55m1 stop Amsterdam Schiphol

$830Delta

Fri, Nov 13 - Fri, Nov 27

12:35 pm - 10:35 amIAD Washington, D.C. Dulles Intl-OPO Porto

17h 00m2 stops New York John F Kennedy Intl Paris Charles de Gaulle

5:00 am - 3:55 pmOPO Porto-IAD Washington, D.C. Dulles Intl

15h 55m1 stop Amsterdam Schiphol

$834Delta

Fri, Nov 13 - Fri, Nov 27

12:35 pm - 10:35 amIAD Washington, D.C. Dulles Intl-OPO Porto

17h 00m2 stops New York John F Kennedy Intl Paris Charles de Gaulle

5:00 am - 3:55 pmOPO Porto-IAD Washington, D.C. Dulles Intl

15h 55m1 stop Amsterdam Schiphol

$835Delta

Fri, Nov 13 - Fri, Nov 27

12:37 pm - 9:30 amIAD Washington, D.C. Dulles Intl-OPO Porto

15h 53m1 stop Newark

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

14h 55m1 stop Frankfurt am Main

$879United Airlines

Thu, Nov 12 - Sat, Nov 21

10:59 am - 9:30 amDCA Washington, D.C. Reagan-National-OPO Porto

17h 31m1 stop Newark

12:35 pm - 3:28 pmOPO Porto-DCA Washington, D.C. Reagan-National

31h 53m1 stop Newark

$904United Airlines

Thu, Nov 12 - Mon, Nov 16

10:05 am - 9:30 amDCA Washington, D.C. Reagan-National-OPO Porto

18h 25m1 stop Newark

12:35 pm - 3:28 pmOPO Porto-DCA Washington, D.C. Reagan-National

31h 53m1 stop Newark

$904United Airlines

Thu, Nov 12 - Mon, Nov 16

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TAP AIR PORTUGAL flights from District of Columbia to Porto

Our best TAP AIR PORTUGAL deals on District of Columbia to Porto flight tickets

TAP AIR PORTUGAL

Feb 4

IAD5:25 pmWashington, D.C. Dulles Intl

19h 35m

1 stop

OPO6:00 pmPorto

Feb 11

OPO8:30 amPorto

11h 45m

1 stop

IAD3:15 pmWashington, D.C. Dulles Intl

$574

TAP AIR PORTUGAL

Feb 11

IAD5:25 pmWashington, D.C. Dulles Intl

11h 35m

1 stop

OPO10:00 amPorto

Feb 16

OPO5:00 amPorto

14h 40m

1 stop

IAD2:40 pmWashington, D.C. Dulles Intl

$586

TAP AIR PORTUGAL

Jan 28

IAD5:25 pmWashington, D.C. Dulles Intl

11h 35m

1 stop

OPO10:00 amPorto

Feb 4

OPO8:30 amPorto

11h 45m

1 stop

IAD3:15 pmWashington, D.C. Dulles Intl

$597

United Airlines flights from District of Columbia to Porto

Our best United Airlines deals on District of Columbia to Porto flight tickets

United Airlines

Apr 11

IAD8:15 amWashington, D.C. Dulles Intl

20h 30m

1 stop

OPO9:45 amPorto

Apr 16

OPO6:00 amPorto

14h 05m

1 stop

IAD3:05 pmWashington, D.C. Dulles Intl

$723

United Airlines

Mar 23

DCA4:00 pmWashington, D.C. Reagan-National

13h 30m

1 stop

OPO9:30 amPorto

Mar 30

OPO6:00 amPorto

18h 33m

2 stops

DCA7:33 pmWashington, D.C. Reagan-National

$734

United Airlines

Dec 8

DCA9:00 amWashington, D.C. Reagan-National

19h 30m

1 stop

OPO9:30 amPorto

Dec 16

OPO12:35 pmPorto

14h 22m

1 stop

DCA9:57 pmWashington, D.C. Reagan-National

$749

momondo Fare Finder

Use the filters below to find and compare flights from District of Columbia to Porto that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Washington, D.C.Porto

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

IADOPO

Washington, D.C. Dulles Intl

Thu 2/4

5:25 pm-6:00 pm

1 stop19h 35m

Porto

Thu 2/11

8:30 am-3:15 pm

1 stop11h 45m

$574

Quickest round-trip

Washington, D.C.Porto

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

IADOPO

Washington, D.C. Dulles Intl

Thu 2/11

5:25 pm-10:00 am

1 stop11h 35m

Porto

Tue 2/16

5:00 am-2:40 pm

1 stop14h 40m

$586

Washington, D.C.Porto

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

IADOPO

Washington, D.C. Dulles Intl

Fri 2/12

10:30 pm-10:00 pm

2 stops18h 30m

Porto

Mon 2/15

8:35 pm-2:40 pm

2 stops23h 05m

$605

Washington, D.C.Porto

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

IADOPO

Washington, D.C. Dulles Intl

Mon 1/18

5:25 pm-8:10 am

3 stops33h 45m

Porto

Wed 1/27

6:25 am-8:30 pm

2 stops19h 05m

$610

Washington, D.C.Porto

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

IADOPO

Washington, D.C. Dulles Intl

Tue 3/23

5:20 pm-9:30 am

1 stop12h 10m

Porto

Tue 3/30

6:00 am-7:55 pm

1 stop18h 55m

$724

Washington, D.C.Porto

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

IADOPO

Washington, D.C. Dulles Intl

Wed 2/17

6:40 pm-10:00 pm

1 stop22h 20m

Porto

Tue 2/23

11:15 am-3:55 pm

1 stop33h 40m

$726

Washington, D.C.Porto

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

IADOPO

Washington, D.C. Dulles Intl

Tue 3/23

4:00 pm-10:35 am

2 stops14h 35m

Porto

Tue 3/30

5:00 am-3:30 pm

1 stop15h 30m

$729

Washington, D.C.Porto

DCA Washington, D.C. Reagan-National - OPO Porto

DCAOPO

Washington, D.C. Reagan-National

Mon 4/12

1:00 pm-9:45 am

1 stop15h 45m

Porto

Thu 4/15

12:00 pm-10:33 pm

2 stops15h 33m

$731

Washington, D.C.Porto

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

IADOPO

Washington, D.C. Dulles Intl

Wed 1/27

6:40 pm-10:35 am

1 stop10h 55m

Porto

Wed 2/3

5:00 am-4:44 pm

2 stops16h 44m

$745

Washington, D.C.Porto

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

IADOPO

Washington, D.C. Dulles Intl

Fri 12/4

12:35 pm-8:15 am

1 stop14h 40m

Porto

Fri 12/11

5:00 am-3:55 pm

1 stop15h 55m

$776

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 District of Columbia 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

What is the cheapest month to fly to Porto?

The month of January is, on average, the cheapest month to fly to Porto from District of Columbia, with most prices found around $592. If you aren’t able to travel during the month of January, then book flights to Porto from District of Columbia 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 District of Columbia to Porto?

You are more likely to see cheaper flights to Porto from District of Columbia when booking weeks ahead of your departure date. In general, you can expect to find flights to Porto for around $870 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Porto from District of Columbia for as low as $608 on momondo.

Can stopping save me money on District of Columbia to Porto flights?

You could potentially save up to 13% on your flight if you consider stops on a District of Columbia to Porto flight.

Cheap District of Columbia to Porto flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from District of Columbia to Porto

Best Price Found	$217
Fastest flight time	9h 45m
Direct flights	None

The best one-way flight to Porto from District of Columbia in the past 72 hours is $217. The best round-trip flight deal from District of Columbia to Porto found on momondo in the last 72 hours is $574.

The fastest flight from District of Columbia to Porto takes 9h 45m

There are no direct flights from District of Columbia to Porto. There are no popular flight routes from District of Columbia to Porto.

Search flight deals

Frequently asked questions about flying from District of Columbia to Porto

When did momondo last update prices for flights from District of Columbia to Porto Airport?
Prices for flights from District of Columbia to Porto Airport are updated daily.
How many operators does momondo search for flights from District of Columbia to Porto Airport?
As of November 2026, there are 5 operators available to choose from for flights from District of Columbia to Porto Airport.
How old do you have to be to fly from District of Columbia to Porto Airport?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from District of Columbia to Porto Airport.
What documentation or ID do you need to fly to Porto Airport?
The necessary travel and health documents for your Porto Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Best airlines flying from District of Columbia to Porto

Compare and see reviews for airlines that fly from District of Columbia to Porto with momondo

Airline	Rating	Free Cancellation	Price
KLM	PriceFrom $477	Free Cancellation	Rating 7.8 1,595 reviews	Search KLM flights
Lufthansa	PriceFrom $514	Free Cancellation	Rating 6.8 8,292 reviews	Search Lufthansa flights
TAP AIR PORTUGAL	PriceFrom $518	Free Cancellation	Rating 7.2 2,395 reviews	Search TAP AIR PORTUGAL flights
United Airlines	PriceFrom $641	Free Cancellation	Rating 7.3 10,472 reviews	Search United Airlines flights
Delta	PriceFrom $774	Free Cancellation	Rating 7.8 8,699 reviews	Search Delta flights

Braga

Coimbra

Vila Nova de Gaia

Aveiro

Pinhao

Esposende

Matosinhos

Chaves

Viseu

Espinho

Arcos de Valdevez

Lamego

Guimarães

Caminha

Penafiel

Ponte de Lima

Mira

Why use momondo?

Why should I use momondo to find a flight deal from District of Columbia to Porto?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Porto from District of Columbia.

Can I find flights from District of Columbia to Porto with flexible booking policies on momondo?

Flights from District of Columbia 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 District of Columbia to Porto?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from District of Columbia to Porto.

I’m not ready to book a flight from District of Columbia to Porto right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Porto from District of Columbia. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

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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Nearby airports

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Complete your trip

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Airports servicing Portugal

Faro Airport

Lisbon Humberto Delgado Airport

Azores Airport

Madeira Airport

Algarve Airport

Cheap flights from District of Columbia to Porto from $217

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from District of Columbia to Porto departing on 11/16. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Find the cheapest flights from District of Columbia to Porto

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Big names and deals

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TAP AIR PORTUGAL flights from District of Columbia to Porto

Our best TAP AIR PORTUGAL deals on District of Columbia to Porto flight tickets

United Airlines flights from District of Columbia to Porto

Our best United Airlines deals on District of Columbia to Porto flight tickets

momondo Fare Finder

Use the filters below to find and compare flights from District of Columbia to Porto that are best for you.

See travel insights to Porto from

How to get the cheapest flight ticket from District of Columbia to Porto

What is the cheapest month to fly to Porto?

How far in advance should I book a flight from District of Columbia to Porto?

Can stopping save me money on District of Columbia to Porto flights?

What is the cheapest airline that flies from District of Columbia to Porto?

What airlines fly to Porto?

Cheap District of Columbia to Porto flight deals and tips

Best Price Found

Fastest flight time

Direct flights

Frequently asked questions about flying from District of Columbia to Porto

Best airlines flying from District of Columbia to Porto

Compare and see reviews for airlines that fly from District of Columbia 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

Daily price changes in your inbox - only with Price Alerts.

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

Fly to other destinations from District of Columbia

According to popular flight searches on momondo this year

Complete your trip to Porto

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