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

TAP AIR PORTUGAL, United Airlines, and SWISS 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 68% 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 September 2025, 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.

$240 Cheap Flights from District of Columbia to Porto in 2025/26

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Find the cheapest flights from District of Columbia to Porto

Round-trip

One-way

Last minute

Cheap round-trip flights

1:00 pm - 10:30 amIAD-OPO

16h 30m2 stops

6:30 am - 4:05 pmOPO-IAD

14h 35m1 stop

$539Delta

Find Deal

dom., feb. 15 - dom., feb. 22

10:55 pm - 10:25 pmIAD-OPO

18h 30m2 stops

6:00 am - 3:50 pmOPO-IAD

14h 50m1 stop

$540Lufthansa

Find Deal

lun., nov. 3 - lun., nov. 10

5:33 pm - 9:30 amIAD-OPO

10h 57m1 stop

12:30 pm - 7:27 amOPO-IAD

23h 57m2 stops

$541United Airlines

Find Deal

jue., nov. 6 - mar., nov. 11

4:35 pm - 7:35 amIAD-OPO

10h 00m1 stop

8:20 am - 4:30 pmOPO-IAD

13h 10m1 stop

$545Iberia

Find Deal

jue., oct. 23 - mar., nov. 4

6:05 pm - 3:25 pmIAD-OPO

16h 20m1 stop

6:35 am - 4:05 pmOPO-IAD

14h 30m1 stop

$546Delta

Find Deal

mié., dic. 10 - jue., ene. 15

5:33 pm - 9:30 amIAD-OPO

10h 57m1 stop

6:00 am - 5:30 pmOPO-IAD

40h 30m2 stops

$547United Airlines

Find Deal

mié., nov. 12 - dom., nov. 16

10:30 pm - 6:00 pmIAD-OPO

14h 30m1 stop

12:00 pm - 9:00 pmOPO-IAD

14h 00m1 stop

$548TAP AIR PORTUGAL

Find Deal

vie., nov. 7 - dom., nov. 16

6:20 pm - 8:00 pmIAD-OPO

20h 40m2 stops

8:20 am - 4:30 pmOPO-IAD

13h 10m1 stop

$549Iberia

Find Deal

vie., dic. 5 - mar., ene. 20

9:40 pm - 3:50 pmIAD-OPO

37h 10m1 stop

4:10 pm - 8:20 pmOPO-IAD

32h 10m1 stop

$550Turkish Airlines

Find Deal

mar., oct. 21 - mar., oct. 28

9:40 pm - 3:50 pmIAD-OPO

37h 10m1 stop

11:05 am - 11:45 amOPO-IAD

29h 40m1 stop

$559Turkish Airlines

Find Deal

mar., oct. 14 - jue., oct. 23

Air Canada flights from District of Columbia to Porto

Our best Air Canada deals on District of Columbia to Porto flight tickets

Air Canada

Feb 12

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

24h 10m

2 stops

OPO11:10 amPorto

Feb 18

OPO6:00 amPorto

31h 55m

2 stops

DCA8:55 amWashington, D.C. Reagan-National

$553

Find similar

Air Canada

Dec 11

DCA9:40 amWashington, D.C. Reagan-National

24h 05m

2 stops

OPO2:45 pmPorto

Jan 15

OPO6:00 amPorto

41h 05m

2 stops

DCA6:05 pmWashington, D.C. Reagan-National

$567

Find similar

Air Canada

Dec 11

DCA6:59 amWashington, D.C. Reagan-National

26h 46m

2 stops

OPO2:45 pmPorto

Jan 9

OPO6:00 amPorto

18h 45m

2 stops

DCA7:45 pmWashington, D.C. Reagan-National

$568

Find similar

Turkish Airlines flights from District of Columbia to Porto

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

Turkish Airlines

Oct 21

IAD9:40 pmWashington, D.C. Dulles Intl

37h 10m

1 stop

OPO3:50 pmPorto

Oct 28

OPO4:10 pmPorto

32h 10m

1 stop

IAD8:20 pmWashington, D.C. Dulles Intl

$550

Find similar

Turkish Airlines

Oct 14

IAD9:40 pmWashington, D.C. Dulles Intl

37h 10m

1 stop

OPO3:50 pmPorto

Oct 23

OPO11:05 amPorto

29h 40m

1 stop

IAD11:45 amWashington, D.C. Dulles Intl

$559

Find similar

Turkish Airlines

Sep 30

IAD1:30 pmWashington, D.C. Dulles Intl

21h 20m

1 stop

OPO3:50 pmPorto

Oct 8

OPO4:50 pmPorto

31h 55m

1 stop

IAD7:45 pmWashington, D.C. Dulles Intl

$690

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

dom. 2/15

1:00 pm-10:30 am

2 stops16h 30m

Porto

dom. 2/22

6:30 am-4:05 pm

1 stop14h 35m

$539

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

lun. 11/3

10:55 pm-10:25 pm

2 stops18h 30m

Porto

lun. 11/10

6:00 am-3:50 pm

1 stop14h 50m

$540

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

jue. 11/6

5:33 pm-9:30 am

1 stop10h 57m

Porto

mar. 11/11

12:30 pm-7:27 am

2 stops23h 57m

$541

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

jue. 10/23

4:35 pm-7:35 am

1 stop10h 00m

Porto

mar. 11/4

8:20 am-4:30 pm

1 stop13h 10m

$545

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

mié. 12/10

6:05 pm-3:25 pm

1 stop16h 20m

Porto

jue. 1/15

6:35 am-4:05 pm

1 stop14h 30m

$546

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

mié. 11/12

5:33 pm-9:30 am

1 stop10h 57m

Porto

dom. 11/16

6:00 am-5:30 pm

2 stops40h 30m

$547

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

vie. 11/7

10:30 pm-6:00 pm

1 stop14h 30m

Porto

dom. 11/16

12:00 pm-9:00 pm

1 stop14h 00m

$548

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

vie. 12/5

6:20 pm-8:00 pm

2 stops20h 40m

Porto

mar. 1/20

8:20 am-4:30 pm

1 stop13h 10m

$549

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

mar. 10/21

9:40 pm-3:50 pm

1 stop37h 10m

Porto

mar. 10/28

4:10 pm-8:20 pm

1 stop32h 10m

$550

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

mar. 10/14

9:40 pm-3:50 pm

1 stop37h 10m

Porto

jue. 10/23

11:05 am-11:45 am

1 stop29h 40m

$559

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 $529. If you aren’t able to travel during the month of November, then book flights to Porto from District of Columbia during January instead. Flights to Porto in January, while not as cheap as those in November, still average around $585.

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.

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

You could potentially save up to 41% 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

Direct flights	None

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

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 September 2025, 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
Delta	PriceFrom $418	Free Cancellation	Rating 7.9 7,971 reviews	Search Delta flights
KLM	PriceFrom $419	Free Cancellation	Rating 7.8 1,387 reviews	Search KLM flights
TAP AIR PORTUGAL	PriceFrom $471	Free Cancellation	Rating 7.1 1,987 reviews	Search TAP AIR PORTUGAL flights
United Airlines	PriceFrom $499	Free Cancellation	Rating 7.4 8,922 reviews	Search United Airlines flights
Iberia	PriceFrom $515	Free Cancellation	Rating 7.0 2,938 reviews	Search Iberia flights
Lufthansa	PriceFrom $629	Free Cancellation	Rating 6.8 7,421 reviews	Search Lufthansa flights

Vila Nova de Gaia

Aveiro

Coimbra

Braga

Matosinhos

Caminha

Guimarães

Esposende

Lamego

Chaves

Espinho

Arcos de Valdevez

Viseu

Ponte de Lima

Pinhao

Santa Maria da Feira

Curia

Penafiel

Mesao Frio

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.

Start using Trips

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mié. 10/22

mié. 10/29

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Algarve Airport

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Cheap flights from District of Columbia to Porto from $240

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 11/4. 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

Air Canada flights from District of Columbia to Porto

Our best Air Canada deals on District of Columbia to Porto flight tickets

Turkish Airlines flights from District of Columbia to Porto

Our best Turkish 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?

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

You could potentially save up to 41% on your flight if you consider stops on a District of Columbia to Porto flight.

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

TAP AIR PORTUGAL, United Airlines, and SWISS 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

Direct flights

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