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

TAP AIR PORTUGAL, SWISS, 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 67% 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 December 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.

$350 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

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One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

5:25 pm - 11:15 am

IAD

OPO

12h 50m1 stop

12:05 pm - 3:30 pm

OPO

IAD

32h 25m1 stop

$434SWISS

lun., ene. 12 - lun., ene. 26

10:15 pm - 11:10 am

IAD

OPO

31h 55m2 stops

12:05 pm - 3:10 pm

OPO

IAD

32h 05m1 stop

$442SWISS

mié., ene. 14 - jue., ene. 22

5:45 pm - 12:05 pm

IAD

OPO

13h 20m1 stop

12:55 pm - 2:35 pm

OPO

IAD

30h 40m1 stop

$447Brussels Airlines

lun., ene. 12 - lun., ene. 26

5:25 pm - 11:15 am

IAD

OPO

13h 50m1 stop

6:00 am - 4:50 pm

OPO

IAD

14h 50m1 stop

$457Multiple Airlines

mar., mar. 17 - jue., mar. 26

5:45 pm - 12:05 pm

IAD

OPO

13h 20m1 stop

12:05 pm - 3:10 pm

OPO

IAD

32h 05m1 stop

$458Multiple Airlines

mié., ene. 14 - jue., ene. 22

5:45 pm - 11:15 am

IAD

OPO

12h 30m1 stop

7:25 pm - 3:05 pm

OPO

IAD

24h 40m1 stop

$459SWISS

mié., feb. 18 - mar., feb. 24

9:45 am - 1:15 pm

IAD

OPO

22h 30m2 stops

6:00 am - 3:50 pm

OPO

IAD

14h 50m1 stop

$461Multiple Airlines

mié., feb. 11 - mar., feb. 17

5:45 pm - 12:05 pm

IAD

OPO

13h 20m1 stop

12:10 pm - 3:30 pm

OPO

IAD

32h 20m1 stop

$464Multiple Airlines

mié., ene. 21 - mié., ene. 28

11:05 am - 1:15 pm

DCA

OPO

21h 10m2 stops

6:00 am - 8:55 am

OPO

DCA

31h 55m2 stops

$488Air Canada

mié., ene. 14 - jue., ene. 22

1:45 pm - 3:25 pm

DCA

OPO

20h 40m2 stops

11:15 am - 4:19 pm

OPO

DCA

34h 04m2 stops

$489Delta

lun., ene. 12 - lun., ene. 26

Iberia flights from District of Columbia to Porto

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

Iberia

Jan 12

DCA1:35 pmWashington, D.C. Reagan-National

13h 05m

2 stops

OPO7:40 amPorto

Jan 26

OPO8:20 amPorto

15h 34m

2 stops

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

$535

Find similar

Iberia

Jan 8

DCA1:59 pmWashington, D.C. Reagan-National

12h 41m

2 stops

OPO7:40 amPorto

Jan 15

OPO8:20 amPorto

15h 36m

2 stops

DCA6:56 pmWashington, D.C. Reagan-National

$558

Find similar

Iberia

Jan 15

DCA1:59 pmWashington, D.C. Reagan-National

12h 41m

2 stops

OPO7:40 amPorto

Jan 19

OPO8:40 pmPorto

25h 28m

2 stops

DCA5:08 pmWashington, D.C. Reagan-National

$560

Find similar

British Airways flights from District of Columbia to Porto

Our best British Airways deals on District of Columbia to Porto flight tickets

British Airways

Mar 8

DCA10:45 pmWashington, D.C. Reagan-National

38h 50m

2 stops

OPO5:35 pmPorto

Mar 15

OPO8:05 pmPorto

30h 11m

2 stops

DCA10:16 pmWashington, D.C. Reagan-National

$580

Find similar

British Airways

Mar 6

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

31h 55m

2 stops

OPO7:00 pmPorto

Mar 14

OPO7:50 pmPorto

26h 58m

2 stops

DCA6:48 pmWashington, D.C. Reagan-National

$630

Find similar

British Airways

Dec 17

DCA8:19 amWashington, D.C. Reagan-National

27h 26m

2 stops

OPO4:45 pmPorto

Dec 24

OPO6:35 pmPorto

31h 55m

2 stops

DCA9:30 pmWashington, D.C. Reagan-National

$1,365

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

lun. 1/12

5:25 pm-11:15 am

1 stop12h 50m

Porto

lun. 1/26

12:05 pm-3:30 pm

1 stop32h 25m

$434

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

mié. 1/14

10:15 pm-11:10 am

2 stops31h 55m

Porto

jue. 1/22

12:05 pm-3:10 pm

1 stop32h 05m

$442

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

lun. 1/12

5:45 pm-12:05 pm

1 stop13h 20m

Porto

lun. 1/26

12:55 pm-2:35 pm

1 stop30h 40m

$447

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

mar. 3/17

5:25 pm-11:15 am

1 stop13h 50m

Porto

jue. 3/26

6:00 am-4:50 pm

1 stop14h 50m

$457

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

mié. 1/14

5:45 pm-12:05 pm

1 stop13h 20m

Porto

jue. 1/22

12:05 pm-3:10 pm

1 stop32h 05m

$458

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

mié. 2/18

5:45 pm-11:15 am

1 stop12h 30m

Porto

mar. 2/24

7:25 pm-3:05 pm

1 stop24h 40m

$459

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

mié. 2/11

9:45 am-1:15 pm

2 stops22h 30m

Porto

mar. 2/17

6:00 am-3:50 pm

1 stop14h 50m

$461

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

mié. 1/21

5:45 pm-12:05 pm

1 stop13h 20m

Porto

mié. 1/28

12:10 pm-3:30 pm

1 stop32h 20m

$464

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

mié. 1/14

11:05 am-1:15 pm

2 stops21h 10m

Porto

jue. 1/22

6:00 am-8:55 am

2 stops31h 55m

$488

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

lun. 1/12

1:45 pm-3:25 pm

2 stops20h 40m

Porto

lun. 1/26

11:15 am-4:19 pm

2 stops34h 04m

$489

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 October is, on average, the cheapest month to fly to Porto from District of Columbia, with most prices found around $594. If you aren’t able to travel during the month of October, then book flights to Porto from District of Columbia during February instead. Flights to Porto in February, while not as cheap as those in October, still average around $613.

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.

How far in advance should I book a flight 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 $720 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 $663 on momondo.

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

You could potentially save up to 32% 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 20m
Direct flights	None

The fastest flight from District of Columbia to Porto takes 9h 20m

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 December 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 $439	Free Cancellation	Rating 7.9 8,007 reviews	Search Delta flights
United Airlines	PriceFrom $494	Free Cancellation	Rating 7.4 9,093 reviews	Search United Airlines flights
TAP AIR PORTUGAL	PriceFrom $505	Free Cancellation	Rating 7.1 2,089 reviews	Search TAP AIR PORTUGAL flights
Iberia	PriceFrom $515	Free Cancellation	Rating 7.0 3,045 reviews	Search Iberia flights
KLM	PriceFrom $555	Free Cancellation	Rating 7.7 1,432 reviews	Search KLM flights
Lufthansa	PriceFrom $615	Free Cancellation	Rating 6.8 7,626 reviews	Search Lufthansa flights

Vila Nova de Gaia

Coimbra

Braga

Aveiro

Matosinhos

Guimarães

Esposende

Lamego

Chaves

Viseu

Espinho

Ponte de Lima

Arcos de Valdevez

Pinhao

Curia

Penafiel

Mesao Frio

Mira

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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Algarve Airport

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Cheap flights from District of Columbia to Porto from $322

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 1/7. 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

Iberia flights from District of Columbia to Porto

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

British Airways flights from District of Columbia to Porto

Our best British Airways 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?

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?

How far in advance should I book a flight to Porto?

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

You could potentially save up to 32% 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, SWISS, 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

Fastest flight time

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