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

Delta, United Airlines, and KLM 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 6 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 July 2026, there are 6 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.

$235 Cheap Flights from District of Columbia to Porto in 2026

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.

10:35 pm - 7:00 pm

IAD

OPO

15h 25m

1 stop

9:00 am - 3:10 pm

OPO

IAD

11h 10m

1 stop

$731TAP AIR PORTUGAL

Mon, Aug 17 - Sat, Aug 29

8:30 pm - 8:55 pm

IAD

OPO

19h 25m

2 stops

2:00 pm - 7:00 pm

OPO

IAD

34h 00m

2 stops

$735Multiple Airlines

Tue, Oct 6 - Tue, Oct 13

12:30 pm - 10:35 am

IAD

OPO

17h 05m

2 stops

5:00 am - 3:55 pm

OPO

IAD

15h 55m

1 stop

$741Delta

Mon, Nov 16 - Fri, Dec 4

5:15 pm - 7:00 am

IAD

OPO

32h 45m

2 stops

6:00 am - 8:10 pm

OPO

IAD

19h 10m

2 stops

$742Air Canada

Tue, Oct 20 - Wed, Nov 11

5:50 pm - 4:00 pm

IAD

OPO

17h 10m

1 stop

8:20 am - 4:20 pm

OPO

IAD

13h 00m

1 stop

$747Iberia

Thu, Nov 19 - Thu, Nov 26

11:55 am - 10:35 am

DCA

OPO

17h 40m

2 stops

5:00 am - 5:59 pm

OPO

DCA

17h 59m

2 stops

$751Delta

Mon, Nov 16 - Fri, Dec 4

4:05 pm - 9:30 am

DCA

OPO

12h 25m

1 stop

12:35 pm - 9:53 pm

OPO

DCA

14h 18m

1 stop

$755United Airlines

Mon, Nov 16 - Fri, Dec 4

6:30 pm - 7:40 am

DCA

OPO

32h 10m

2 stops

8:20 am - 6:54 pm

OPO

DCA

15h 34m

2 stops

$769Iberia

Sat, Jan 2 - Sat, Jan 30

4:30 pm - 9:30 am

DCA

OPO

12h 00m

1 stop

6:00 am - 5:23 pm

OPO

DCA

16h 23m

2 stops

$777United Airlines

Sun, Dec 27 - Fri, Jan 8

6:00 am - 11:15 am

DCA

OPO

24h 15m

2 stops

6:00 am - 7:58 pm

OPO

DCA

42h 58m

2 stops

$782Air Canada

Tue, Dec 29 - Fri, Jan 8

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Iberia flights from District of Columbia to Porto

Our best Iberia deals on District of Columbia to Porto flight tickets

Iberia

Sep 27

IAD10:25 pmWashington, D.C. Dulles Intl

16h 35m

2 stops

OPO8:00 pmPorto

Nov 3

OPO8:40 pmPorto

24h 40m

1 stop

IAD4:20 pmWashington, D.C. Dulles Intl

$754

Iberia

Jan 2

DCA6:30 pmWashington, D.C. Reagan-National

32h 10m

2 stops

OPO7:40 amPorto

Jan 30

OPO8:20 amPorto

15h 34m

2 stops

DCA6:54 pmWashington, D.C. Reagan-National

$769

Iberia

Sep 21

DCA12:59 pmWashington, D.C. Reagan-National

13h 41m

2 stops

OPO7:40 amPorto

Sep 28

OPO12:25 pmPorto

15h 45m

2 stops

DCA11:10 pmWashington, D.C. Reagan-National

$828

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

Aug 17

IAD10:35 pmWashington, D.C. Dulles Intl

15h 25m

1 stop

OPO7:00 pmPorto

Aug 29

OPO9:00 amPorto

11h 10m

1 stop

IAD3:10 pmWashington, D.C. Dulles Intl

$731

TAP AIR PORTUGAL

Oct 10

IAD5:05 pmWashington, D.C. Dulles Intl

10h 05m

1 stop

OPO8:10 amPorto

Oct 26

OPO6:00 pmPorto

25h 45m

1 stop

IAD3:45 pmWashington, D.C. Dulles Intl

$749

TAP AIR PORTUGAL

Aug 12

IAD5:45 pmWashington, D.C. Dulles Intl

11h 25m

1 stop

OPO10:10 amPorto

Aug 26

OPO6:00 pmPorto

26h 10m

1 stop

IAD3:10 pmWashington, D.C. Dulles Intl

$756

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

Quickest round-trip

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Mon 8/17

10:35 pm-7:00 pm

1 stop15h 25m

Porto

Sat 8/29

9:00 am-3:10 pm

1 stop11h 10m

$731

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Tue 10/6

8:30 pm-8:55 pm

2 stops19h 25m

Porto

Tue 10/13

2:00 pm-7:00 pm

2 stops34h 00m

$735

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Mon 11/16

12:30 pm-10:35 am

2 stops17h 05m

Porto

Fri 12/4

5:00 am-3:55 pm

1 stop15h 55m

$741

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Tue 10/20

5:15 pm-7:00 am

2 stops32h 45m

Porto

Wed 11/11

6:00 am-8:10 pm

2 stops19h 10m

$742

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Thu 11/19

5:50 pm-4:00 pm

1 stop17h 10m

Porto

Thu 11/26

8:20 am-4:20 pm

1 stop13h 00m

$747

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

Mon 11/16

11:55 am-10:35 am

2 stops17h 40m

Porto

Fri 12/4

5:00 am-5:59 pm

2 stops17h 59m

$751

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

Mon 11/16

4:05 pm-9:30 am

1 stop12h 25m

Porto

Fri 12/4

12:35 pm-9:53 pm

1 stop14h 18m

$755

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

Sat 1/2

6:30 pm-7:40 am

2 stops32h 10m

Porto

Sat 1/30

8:20 am-6:54 pm

2 stops15h 34m

$769

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

Sun 12/27

4:30 pm-9:30 am

1 stop12h 00m

Porto

Fri 1/8

6:00 am-5:23 pm

2 stops16h 23m

$777

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

Tue 12/29

6:00 am-11:15 am

2 stops24h 15m

Porto

Fri 1/8

6:00 am-7:58 pm

2 stops42h 58m

$782

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 $613. If you aren’t able to travel during the month of January, then book flights to Porto from District of Columbia during October instead. Flights to Porto in October, while not as cheap as those in January, still average around $656.

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 $830 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 $721 on momondo.

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

You could potentially save up to 10% 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

Fastest flight time	9h 30m
Direct flights	None

The fastest flight from District of Columbia to Porto takes 9h 30m

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 July 2026, there are 6 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 1,550 reviews	Search KLM flights
United Airlines	PriceFrom $480	Free Cancellation	Rating 7.4 10,042 reviews	Search United Airlines flights
TAP AIR PORTUGAL	PriceFrom $501	Free Cancellation	Rating 7.2 2,347 reviews	Search TAP AIR PORTUGAL flights
Lufthansa	PriceFrom $514	Free Cancellation	Rating 6.8 8,159 reviews	Search Lufthansa flights
Delta	PriceFrom $533	Free Cancellation	Rating 7.8 8,485 reviews	Search Delta flights
Iberia	PriceFrom $593	Free Cancellation	Rating 7.0 3,257 reviews	Search Iberia flights

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Coimbra

Braga

Aveiro

Matosinhos

Pinhao

Esposende

Lamego

Chaves

Arcos de Valdevez

Guimarães

Viseu

Espinho

Ponte de Lima

Mesao Frio

Penafiel

Baiao

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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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 $235

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 9/1. 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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Iberia flights from District of Columbia to Porto

Our best Iberia deals on District of Columbia to Porto flight tickets

TAP AIR PORTUGAL flights from District of Columbia to Porto

Our best TAP AIR PORTUGAL 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

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

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