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Cheap flights from Washington, D.C. to Porto from $219

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Washington, D.C. to Porto departing on 10/15. 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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Find the cheapest flights from Washington, D.C. to Porto

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
10:45 am - 9:30 amBWI-OPO
18h 45m2 stops
United Airlines Logo
6:00 am - 10:19 amOPO-BWI
32h 19m2 stops
$490United Airlines
Find Deal
mar., mar. 17 - vie., mar. 27
Delta Logo
12:19 pm - 10:30 amBWI-OPO
18h 11m2 stops
Delta Logo
6:05 am - 6:40 pmOPO-BWI
17h 35m2 stops
$492Delta
Find Deal
mar., oct. 28 - mar., nov. 4
KLM Logo
7:45 pm - 3:25 pmBWI-OPO
14h 40m2 stops
KLM Logo
11:25 am - 11:00 pmOPO-BWI
16h 35m2 stops
$504KLM
Find Deal
lun., nov. 3 - mar., nov. 11
United Airlines Logo
5:33 pm - 9:30 amIAD-OPO
10h 57m1 stop
United Airlines Logo
12:30 pm - 9:21 pmOPO-IAD
37h 51m2 stops
$504United Airlines
Find Deal
mié., nov. 26 - lun., dic. 1
TAP AIR PORTUGAL Logo
10:30 pm - 3:20 pmIAD-OPO
11h 50m1 stop
TAP AIR PORTUGAL Logo
8:30 am - 3:15 pmOPO-IAD
11h 45m1 stop
$506TAP AIR PORTUGAL
Find Deal
dom., feb. 22 - lun., mar. 2
TAP AIR PORTUGAL Logo
5:30 pm - 11:00 amIAD-OPO
12h 30m1 stop
TAP AIR PORTUGAL Logo
2:20 pm - 9:00 pmOPO-IAD
11h 40m1 stop
$509TAP AIR PORTUGAL
Find Deal
mar., feb. 17 - vie., feb. 27
Lufthansa Logo
6:00 pm - 11:40 amIAD-OPO
12h 40m1 stop
Lufthansa Logo
6:00 am - 3:50 pmOPO-IAD
14h 50m1 stop
$514Lufthansa
Find Deal
mié., nov. 19 - dom., nov. 23
Lufthansa Logo
6:00 pm - 11:40 amIAD-OPO
12h 40m1 stop
Lufthansa Logo
6:00 am - 3:50 pmOPO-IAD
14h 50m1 stop
$515Lufthansa
Find Deal
lun., nov. 3 - lun., nov. 10
Delta Logo
9:20 pm - 3:30 pmIAD-OPO
13h 10m1 stop
Delta Logo
11:15 am - 5:05 pmOPO-IAD
33h 50m1 stop
$527Delta
Find Deal
mié., oct. 22 - sáb., nov. 1
KLM Logo
5:25 pm - 10:40 amIAD-OPO
12h 15m1 stop
KLM Logo
6:05 am - 4:05 pmOPO-IAD
15h 00m1 stop
$533KLM
Find Deal
jue., oct. 23 - mar., nov. 4

United Airlines flights from Washington, D.C. to Porto

Our best United Airlines deals on Washington, D.C. to Porto flight tickets
United Airlines
Mar 17
BWI10:45 amBaltimore/Washington
18h 45m
2 stops
OPO9:30 amPorto
Mar 27
OPO6:00 amPorto
32h 19m
2 stops
BWI10:19 amBaltimore/Washington
$490
Find similar
United Airlines
Nov 26
IAD5:33 pmWashington, D.C. Dulles Intl
10h 57m
1 stop
OPO9:30 amPorto
Dec 1
OPO12:30 pmPorto
37h 51m
2 stops
IAD9:21 pmWashington, D.C. Dulles Intl
$504
Find similar
United Airlines
Nov 13
DCA10:05 amWashington, D.C. Reagan-National
18h 25m
1 stop
OPO9:30 amPorto
Nov 20
OPO12:35 pmPorto
12h 00m
1 stop
DCA7:35 pmWashington, D.C. Reagan-National
$505
Find similar

Delta flights from Washington, D.C. to Porto

Our best Delta deals on Washington, D.C. to Porto flight tickets
Delta
Oct 28
BWI12:19 pmBaltimore/Washington
18h 11m
2 stops
OPO10:30 amPorto
Nov 4
OPO6:05 amPorto
17h 35m
2 stops
BWI6:40 pmBaltimore/Washington
$492
Find similar
Delta
Oct 22
IAD9:20 pmWashington, D.C. Dulles Intl
13h 10m
1 stop
OPO3:30 pmPorto
Nov 1
OPO11:15 amPorto
33h 50m
1 stop
IAD5:05 pmWashington, D.C. Dulles Intl
$527
Find similar
Delta
Nov 12
IAD11:05 amWashington, D.C. Dulles Intl
18h 25m
2 stops
OPO10:30 amPorto
Nov 16
OPO5:00 amPorto
16h 05m
1 stop
IAD4:05 pmWashington, D.C. Dulles Intl
$532
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Washington, D.C. to Porto that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated octubre 1, 2025.
Use the filters below to find and compare flights from Washington, D.C. to Porto that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

BaltimorePorto

BWI - OPO

BWIOPO

Baltimore/Washington

mar. 3/17

10:45 am-9:30 am

2 stops18h 45m

Porto

vie. 3/27

6:00 am-10:19 am

2 stops32h 19m

$490

BaltimorePorto

BWI - OPO

BWIOPO

Baltimore/Washington

mar. 10/28

12:19 pm-10:30 am

2 stops18h 11m

Porto

mar. 11/4

6:05 am-6:40 pm

2 stops17h 35m

$492

BaltimorePorto

BWI - OPO

BWIOPO

Baltimore/Washington

lun. 11/3

7:45 pm-3:25 pm

2 stops14h 40m

Porto

mar. 11/11

11:25 am-11:00 pm

2 stops16h 35m

$504

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

mié. 11/26

5:33 pm-9:30 am

1 stop10h 57m

Porto

lun. 12/1

12:30 pm-9:21 pm

2 stops37h 51m

$504

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

dom. 2/22

10:30 pm-3:20 pm

1 stop11h 50m

Porto

lun. 3/2

8:30 am-3:15 pm

1 stop11h 45m

$506

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

mar. 2/17

5:30 pm-11:00 am

1 stop12h 30m

Porto

vie. 2/27

2:20 pm-9:00 pm

1 stop11h 40m

$509

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

mié. 11/19

6:00 pm-11:40 am

1 stop12h 40m

Porto

dom. 11/23

6:00 am-3:50 pm

1 stop14h 50m

$514

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

lun. 11/3

6:00 pm-11:40 am

1 stop12h 40m

Porto

lun. 11/10

6:00 am-3:50 pm

1 stop14h 50m

$515

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

mié. 10/22

9:20 pm-3:30 pm

1 stop13h 10m

Porto

sáb. 11/1

11:15 am-5:05 pm

1 stop33h 50m

$527

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

jue. 10/23

5:25 pm-10:40 am

1 stop12h 15m

Porto

mar. 11/4

6:05 am-4:05 pm

1 stop15h 00m

$533

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Porto from

How to get the cheapest flight ticket from Washington, D.C. 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 typical price of a round-trip flight between Washington, D.C. and Porto?

What is the cheapest month to fly to Porto?

The month of November is, on average, the cheapest month to fly to Porto from Washington, D.C., with most prices found around $529. If you aren’t able to travel during the month of November, then book flights to Porto from Washington, D.C. 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 Washington, D.C. 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 Washington, D.C. 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 Washington, D.C. when booking weeks ahead of your departure date. In general, you can expect to find flights to Porto for around $736 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Porto from Washington, D.C. for as low as $664 on momondo.

Can stopping save me money on Washington, D.C. to Porto flights?

You could potentially save up to 29% on your flight if you consider stops on a Washington, D.C. to Porto flight.

How have Washington, D.C. to Porto flight prices changed over time?

As of October 2025, prices for Washington, D.C. to Porto flights are approximately 13% cheaper when compared to flights at the same time last year.

When to book flights from Washington, D.C. to Porto

Are you open to changing your travel dates? Check out the ideal times to fly from Washington, D.C. to Porto according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Washington, D.C. to Porto (WAS to OPO) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Washington, D.C. to Porto

Direct flights

None
There are no direct flights from Washington, D.C. to Porto. There are no popular flight routes from Washington, D.C. to Porto.
Search flight deals

  • How far is Washington, D.C. to Porto by plane?

    The straight-line distance from Washington, D.C. to Porto is 3523.1 mi. By plane, this route typically takes 9h 25m.

  • When did momondo last update prices for flights from Washington, D.C. to Porto Airport?

    Prices for flights from Washington, D.C. to Porto Airport are refreshed on a daily basis.

  • How many operators does momondo search for flights from Washington, D.C. to Porto Airport?

  • How old do you have to be to fly from Washington, D.C. to Porto Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Washington, D.C. to Porto Airport.

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

    The travel and health documents required for your trip to Porto Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Porto Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular airline from Washington, D.C. to Porto?

Best airlines flying from Washington, D.C. to Porto

Compare and see reviews for airlines that fly from Washington, D.C. to Porto with momondo
Airline
Rating
Free Cancellation
Price
KLMPriceFrom $419Free CancellationRating
7.8
1,389 reviews
Search KLM flights
DeltaPriceFrom $496Free CancellationRating
7.9
7,961 reviews
Search Delta flights
United AirlinesPriceFrom $499Free CancellationRating
7.4
8,929 reviews
Search United Airlines flights
TAP AIR PORTUGALPriceFrom $509Free CancellationRating
7.1
1,997 reviews
Search TAP AIR PORTUGAL flights
IberiaPriceFrom $515Free CancellationRating
7.0
2,966 reviews
Search Iberia flights
LufthansaPriceFrom $629Free CancellationRating
6.8
7,443 reviews
Search Lufthansa flights

Traveling to a place near Porto?

Book flights to Porto if you plan to visit one of these locations
Vila Nova de Gaia
Coimbra
Aveiro
Braga
Matosinhos
Caminha
Esposende
Lamego
Guimarães
Chaves
Espinho
Viseu
Ponte de Lima
Arcos de Valdevez
Pinhao
Santa Maria da Feira
Curia
Penafiel
Mesao Frio
Mira

Why use momondo?

Why should I use momondo to find a flight deal from Washington, D.C. to Porto?

It is quick and easy to find Washington, D.C. to Porto flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Porto that suits you.

Can I find flights from Washington, D.C. to Porto with flexible booking policies on momondo?

Flights from Washington, D.C. 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 Washington, D.C. to Porto?

momondo provides multiple filters to help you find the best flight to Porto from Washington, D.C.. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from Washington, D.C. to Porto right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Washington, D.C. to Porto now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Porto and let you know when they change.

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