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

KLM, Delta, 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 74% 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 May 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.

$329 Cheap Flights from District of Columbia to Porto in 2026

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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.

8:20 pm - 6:15 am

DCA

OPO

28h 55m

1 stop

11:20 am - 10:20 am

OPO

DCA

28h 00m

1 stop

$878United Airlines

lun., ago. 31 - mié., sep. 16

10:35 pm - 8:25 pm

IAD

OPO

16h 50m

1 stop

9:00 am - 3:10 pm

OPO

IAD

11h 10m

1 stop

$879TAP AIR PORTUGAL

jue., ago. 27 - dom., sep. 20

7:40 pm - 11:30 pm

IAD

OPO

22h 50m

2 stops

8:20 pm - 3:15 pm

OPO

IAD

47h 55m

3 stops

$880Multiple Airlines

vie., nov. 20 - sáb., nov. 28

9:40 am - 7:00 am

DCA

OPO

16h 20m

1 stop

6:00 am - 9:50 pm

OPO

DCA

20h 50m

2 stops

$882Air Canada

lun., ago. 31 - jue., sep. 10

11:30 am - 11:45 am

IAD

OPO

19h 15m

1 stop

10:25 pm - 10:46 am

OPO

IAD

41h 21m

2 stops

$882Multiple Airlines

jue., jul. 9 - lun., jul. 20

9:45 pm - 11:30 pm

IAD

OPO

20h 45m

1 stop

4:50 pm - 11:35 am

OPO

IAD

23h 45m

1 stop

$883Turkish Airlines

sáb., ago. 29 - lun., sep. 14

6:59 am - 4:25 pm

DCA

OPO

28h 26m

2 stops

10:30 pm - 9:50 pm

OPO

DCA

28h 20m

3 stops

$883Multiple Airlines

mar., sep. 1 - dom., sep. 13

7:15 pm - 3:25 pm

IAD

OPO

15h 10m

2 stops

5:00 am - 3:35 pm

OPO

IAD

15h 35m

1 stop

$884Delta

mié., sep. 2 - jue., sep. 10

10:10 pm - 7:00 am

IAD

OPO

27h 50m

2 stops

6:00 am - 9:24 pm

OPO

IAD

20h 24m

2 stops

$886Air Canada

dom., ago. 30 - vie., sep. 11

5:40 pm - 10:25 am

DCA

OPO

11h 45m

1 stop

5:00 am - 5:48 pm

OPO

DCA

17h 48m

2 stops

$890Delta

dom., ago. 30 - mar., sep. 15

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 27

IAD10:35 pmWashington, D.C. Dulles Intl

16h 50m

1 stop

OPO8:25 pmPorto

Sep 20

OPO9:00 amPorto

11h 10m

1 stop

IAD3:10 pmWashington, D.C. Dulles Intl

$879

TAP AIR PORTUGAL

Oct 1

IAD10:35 pmWashington, D.C. Dulles Intl

11h 25m

1 stop

OPO3:00 pmPorto

Oct 4

OPO9:00 amPorto

11h 10m

1 stop

IAD3:10 pmWashington, D.C. Dulles Intl

$888

TAP AIR PORTUGAL

Jul 13

IAD10:35 pmWashington, D.C. Dulles Intl

15h 25m

1 stop

OPO7:00 pmPorto

Jul 27

OPO10:30 pmPorto

27h 05m

1 stop

IAD8:35 pmWashington, D.C. Dulles Intl

$893

United Airlines flights from District of Columbia to Porto

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

United Airlines

Aug 31

DCA8:20 pmWashington, D.C. Reagan-National

28h 55m

1 stop

OPO6:15 amPorto

Sep 16

OPO11:20 amPorto

28h 00m

1 stop

DCA10:20 amWashington, D.C. Reagan-National

$878

United Airlines

Nov 12

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

12h 30m

1 stop

OPO9:30 amPorto

Nov 30

OPO12:35 pmPorto

14h 56m

1 stop

DCA10:31 pmWashington, D.C. Reagan-National

$885

United Airlines

Sep 21

DCA5:55 pmWashington, D.C. Reagan-National

10h 50m

1 stop

OPO9:45 amPorto

Sep 29

OPO12:15 pmPorto

14h 35m

1 stop

DCA9:50 pmWashington, D.C. Reagan-National

$887

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

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

lun. 8/31

8:20 pm-6:15 am

1 stop28h 55m

Porto

mié. 9/16

11:20 am-10:20 am

1 stop28h 00m

$878

Quickest round-trip

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

jue. 8/27

10:35 pm-8:25 pm

1 stop16h 50m

Porto

dom. 9/20

9:00 am-3:10 pm

1 stop11h 10m

$879

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

vie. 11/20

7:40 pm-11:30 pm

2 stops22h 50m

Porto

sáb. 11/28

8:20 pm-3:15 pm

3 stops47h 55m

$880

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

lun. 8/31

9:40 am-7:00 am

1 stop16h 20m

Porto

jue. 9/10

6:00 am-9:50 pm

2 stops20h 50m

$882

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

jue. 7/9

11:30 am-11:45 am

1 stop19h 15m

Porto

lun. 7/20

10:25 pm-10:46 am

2 stops41h 21m

$882

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

sáb. 8/29

9:45 pm-11:30 pm

1 stop20h 45m

Porto

lun. 9/14

4:50 pm-11:35 am

1 stop23h 45m

$883

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

mar. 9/1

6:59 am-4:25 pm

2 stops28h 26m

Porto

dom. 9/13

10:30 pm-9:50 pm

3 stops28h 20m

$883

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

mié. 9/2

7:15 pm-3:25 pm

2 stops15h 10m

Porto

jue. 9/10

5:00 am-3:35 pm

1 stop15h 35m

$884

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

dom. 8/30

10:10 pm-7:00 am

2 stops27h 50m

Porto

vie. 9/11

6:00 am-9:24 pm

2 stops20h 24m

$886

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

dom. 8/30

5:40 pm-10:25 am

1 stop11h 45m

Porto

mar. 9/15

5:00 am-5:48 pm

2 stops17h 48m

$890

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 December is, on average, the cheapest month to fly to Porto from District of Columbia, with most prices found around $274. If you aren’t able to travel during the month of December, then book flights to Porto from District of Columbia during April instead. Flights to Porto in April, while not as cheap as those in December, still average around $318.

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 $784 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 $629 on momondo.

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

You could potentially save up to 11% 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 40m
Direct flights	None

The fastest flight from District of Columbia to Porto takes 9h 40m

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 May 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 1,524 reviews	Search KLM flights
United Airlines	PriceFrom $493	Free Cancellation	Rating 7.4 9,766 reviews	Search United Airlines flights
TAP AIR PORTUGAL	PriceFrom $498	Free Cancellation	Rating 7.2 2,262 reviews	Search TAP AIR PORTUGAL flights
Lufthansa	PriceFrom $514	Free Cancellation	Rating 6.8 8,035 reviews	Search Lufthansa flights
Iberia	PriceFrom $515	Free Cancellation	Rating 7.0 3,222 reviews	Search Iberia flights
Delta	PriceFrom $529	Free Cancellation	Rating 7.9 8,418 reviews	Search Delta flights

Vila Nova de Gaia

Coimbra

Aveiro

Braga

Matosinhos

Lamego

Chaves

Esposende

Pinhao

Guimarães

Espinho

Arcos de Valdevez

Viseu

Ponte de Lima

Curia

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.

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Complete your trip

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Airports servicing Portugal

Faro Airport

Lisbon Humberto Delgado Airport

Azores Airport

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Algarve Airport

Cheap flights from District of Columbia to Porto from $305

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 11/15. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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Big names and deals

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Filter for what you want

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Cheap round-trip flights

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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

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

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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