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

TAP AIR PORTUGAL, Iberia, and United Airlines are the most popular carriers operating from District of Columbia 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 District of Columbia according to our data. TAP AIR PORTUGAL is the first choice among our users, with 69% of people opting to fly with this airline when traveling to Porto. Keep in mind that there are 8 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 August 2025, there are 8 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.

$241 Cheap Flights from District of Columbia to Porto in 2025

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Find the cheapest flights from District of Columbia to Porto

Round-trip

One-way

Last minute

Cheap round-trip flights

5:33 pm - 9:30 amIAD-OPO

10h 57m1 stop

6:00 am - 11:59 pmOPO-IAD

22h 59m2 stops

$490United Airlines

Find Deal

Sun, Nov 2 - Tue, Nov 11

7:00 pm - 9:30 amDCA-OPO

9h 30m1 stop

6:00 am - 7:35 pmOPO-DCA

18h 35m2 stops

$490United Airlines

Find Deal

Mon, Nov 3 - Tue, Nov 11

10:35 pm - 5:00 pmIAD-OPO

13h 25m1 stop

7:00 am - 3:20 pmOPO-IAD

13h 20m1 stop

$493TAP AIR PORTUGAL

Find Deal

Sat, Sep 6 - Fri, Sep 19

10:20 pm - 8:25 pmIAD-OPO

17h 05m1 stop

9:00 am - 3:20 pmOPO-IAD

11h 20m1 stop

$504TAP AIR PORTUGAL

Find Deal

Wed, Sep 24 - Tue, Oct 7

2:00 pm - 4:00 pmDCA-OPO

21h 00m2 stops

8:40 pm - 4:51 pmOPO-DCA

25h 11m2 stops

$508Iberia

Find Deal

Tue, Nov 4 - Tue, Nov 11

9:35 am - 3:00 pmIAD-OPO

24h 25m2 stops

8:10 pm - 7:25 pmOPO-IAD

28h 15m2 stops

$514

Find Deal

Tue, Oct 7 - Thu, Oct 16

9:45 am - 10:05 pmIAD-OPO

31h 20m3 stops

7:15 am - 9:05 pmOPO-IAD

18h 50m2 stops

$516

Find Deal

Wed, Sep 3 - Wed, Sep 10

2:00 pm - 4:00 pmDCA-OPO

21h 00m2 stops

4:40 pm - 4:51 pmOPO-DCA

29h 11m2 stops

$519Iberia

Find Deal

Tue, Nov 4 - Mon, Nov 10

6:00 pm - 11:40 amIAD-OPO

12h 40m1 stop

12:30 pm - 3:50 pmOPO-IAD

32h 20m1 stop

$520Lufthansa

Find Deal

Sun, Nov 2 - Mon, Nov 10

6:00 pm - 12:50 pmIAD-OPO

13h 50m2 stops

4:15 pm - 3:50 pmOPO-IAD

28h 35m1 stop

$542Lufthansa

Find Deal

Mon, Nov 3 - Mon, Nov 10

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

Sep 6

IAD10:35 pmWashington, D.C. Dulles Intl

13h 25m

1 stop

OPO5:00 pmPorto

Sep 19

OPO7:00 amPorto

13h 20m

1 stop

IAD3:20 pmWashington, D.C. Dulles Intl

$493

Find similar

TAP AIR PORTUGAL

Sep 24

IAD10:20 pmWashington, D.C. Dulles Intl

17h 05m

1 stop

OPO8:25 pmPorto

Oct 7

OPO9:00 amPorto

11h 20m

1 stop

IAD3:20 pmWashington, D.C. Dulles Intl

$504

Find similar

TAP AIR PORTUGAL

Oct 7

IAD5:00 pmWashington, D.C. Dulles Intl

16h 05m

1 stop

OPO2:05 pmPorto

Oct 18

OPO9:15 pmPorto

23h 05m

1 stop

IAD3:20 pmWashington, D.C. Dulles Intl

$506

Find similar

United Airlines flights from District of Columbia to Porto

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

United Airlines

Nov 2

IAD5:33 pmWashington, D.C. Dulles Intl

10h 57m

1 stop

OPO9:30 amPorto

Nov 11

OPO6:00 amPorto

22h 59m

2 stops

IAD11:59 pmWashington, D.C. Dulles Intl

$490

Find similar

United Airlines

Nov 2

DCA6:00 pmWashington, D.C. Reagan-National

10h 30m

1 stop

OPO9:30 amPorto

Nov 11

OPO12:35 pmPorto

13h 03m

1 stop

DCA8:38 pmWashington, D.C. Reagan-National

$493

Find similar

United Airlines

Nov 5

IAD5:33 pmWashington, D.C. Dulles Intl

10h 57m

1 stop

OPO9:30 amPorto

Nov 10

OPO12:30 pmPorto

32h 20m

1 stop

IAD3:50 pmWashington, D.C. Dulles Intl

$499

Find similar

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

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Sun 11/2

5:33 pm-9:30 am

1 stop10h 57m

Porto

Tue 11/11

6:00 am-11:59 pm

2 stops22h 59m

$490

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

Mon 11/3

7:00 pm-9:30 am

1 stop9h 30m

Porto

Tue 11/11

6:00 am-7:35 pm

2 stops18h 35m

$490

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Sat 9/6

10:35 pm-5:00 pm

1 stop13h 25m

Porto

Fri 9/19

7:00 am-3:20 pm

1 stop13h 20m

$493

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Wed 9/24

10:20 pm-8:25 pm

1 stop17h 05m

Porto

Tue 10/7

9:00 am-3:20 pm

1 stop11h 20m

$504

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

Tue 11/4

2:00 pm-4:00 pm

2 stops21h 00m

Porto

Tue 11/11

8:40 pm-4:51 pm

2 stops25h 11m

$508

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Tue 10/7

9:35 am-3:00 pm

2 stops24h 25m

Porto

Thu 10/16

8:10 pm-7:25 pm

2 stops28h 15m

$514

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Wed 9/3

9:45 am-10:05 pm

3 stops31h 20m

Porto

Wed 9/10

7:15 am-9:05 pm

2 stops18h 50m

$516

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

Tue 11/4

2:00 pm-4:00 pm

2 stops21h 00m

Porto

Mon 11/10

4:40 pm-4:51 pm

2 stops29h 11m

$519

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Sun 11/2

6:00 pm-11:40 am

1 stop12h 40m

Porto

Mon 11/10

12:30 pm-3:50 pm

1 stop32h 20m

$520

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Mon 11/3

6:00 pm-12:50 pm

2 stops13h 50m

Porto

Mon 11/10

4:15 pm-3:50 pm

1 stop28h 35m

$542

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 November is, on average, the cheapest month to fly to Porto from District of Columbia, with most prices found around $487. If you aren’t able to travel during the month of November, then book flights to Porto from District of Columbia during October instead. Flights to Porto in October, while not as cheap as those in November, still average around $563.

What is the cheapest day to depart on your flight to Porto?

The cheapest day to depart on your flight to Porto is on a Sunday when prices can be found for as low as $613. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Friday because tickets tend to average around $779. These prices are subject to change though, so be sure to set up a Price Alert for flights to Porto.

What is the cheapest time of day to depart on your flight to Porto?

In the afternoon is the cheapest time of day to fly from District of Columbia to Porto when you can find flight prices for as low as $698. Flying to Porto in the afternoon is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying at noon when prices are $836 on average. Flights to Porto from District of Columbia at noon are generally more expensive because this time of day is more convenient for travelers’ schedules.

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	$241
Fastest flight time	9h 30m
Direct flights	None
Airports in Porto	1 airport

The best one-way flight to Porto from District of Columbia in the past 72 hours is $241. The best round-trip flight deal from District of Columbia to Porto found on momondo in the last 72 hours is $490.

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

There are no direct flights from District of Columbia to Porto. Popular non-direct routes for this connection are Washington, D.C. Reagan-National Airport - Porto Airport and Washington, D.C. Dulles Intl Airport - Porto Airport.

There is 1 airport near Porto: Porto (OPO)

Search flight deals

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 August 2025, there are 8 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
Delta	PriceFrom $418	Free Cancellation	Rating 8.0 7,985 reviews	Search Delta flights
KLM	PriceFrom $424	Free Cancellation	Rating 7.8 1,381 reviews	Search KLM flights
TAP AIR PORTUGAL	PriceFrom $469	Free Cancellation	Rating 7.1 1,944 reviews	Search TAP AIR PORTUGAL flights
Iberia	PriceFrom $515	Free Cancellation	Rating 7.0 2,865 reviews	Search Iberia flights
United Airlines	PriceFrom $520	Free Cancellation	Rating 7.4 8,917 reviews	Search United Airlines flights
SWISS	PriceFrom $542	Free Cancellation	Rating 7.6 1,690 reviews	Search SWISS flights
American Airlines	PriceFrom $573	Free Cancellation	Rating 7.2 10,000 reviews	Search American Airlines flights
Lufthansa	PriceFrom $620	Free Cancellation	Rating 6.8 7,289 reviews	Search Lufthansa flights

Vila Nova de Gaia

Aveiro

Coimbra

Braga

Matosinhos

Caminha

Lamego

Guimarães

Esposende

Chaves

Arcos de Valdevez

Espinho

Viseu

Ponte de Lima

Santa Maria da Feira

Curia

Penafiel

Mesao Frio

Pinhao

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.

Start using Trips

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Lisbon Humberto Delgado Airport

Azores Airport

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Algarve Airport

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Flights from Washington, D.C. Reagan-National to New York John F Kennedy Intl

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Cheap flights from District of Columbia 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 District of Columbia to Porto departing on 9/15. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Big names and deals

Big names and deals

Filter for what you want

Filter for what you want

Trusted and free

Trusted and free

Price Alerts

Price Alerts

Find the cheapest flights from District of Columbia to Porto

Cheap round-trip flights

Cheap one-way flights

Cheap last minute flights

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

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

What is the cheapest month to fly to Porto?

What is the cheapest day to depart on your flight to Porto?

What is the cheapest time of day to depart on your flight to Porto?

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

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

What airlines fly to Porto?

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

Fastest flight time

Direct flights

Airports in Porto

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

How many operators does momondo search 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?

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

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?

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

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

How can momondo help me find flights 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?

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