Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from Washington, D.C. to Porto from $252

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 9/21. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Find the cheapest flights from Washington, D.C. to Porto

Cheap round-trip flights

Logo
5:00 pm - 9:00 pmIAD-OPO
23h 00m2 stops
Logo
10:30 pm - 3:20 pmOPO-IAD
21h 50m2 stops
$439
Find Deal
vie., sep. 26 - vie., oct. 3
Logo
5:10 pm - 9:45 amIAD-OPO
11h 35m1 stop
Logo
6:00 am - 3:50 pmOPO-IAD
14h 50m1 stop
$480
Find Deal
lun., oct. 20 - mar., nov. 4
Lufthansa Logo
10:20 pm - 11:20 pmIAD-OPO
20h 00m1 stop
Lufthansa Logo
6:00 am - 3:50 pmOPO-IAD
14h 50m1 stop
$493Lufthansa
Find Deal
mar., oct. 21 - mar., nov. 4
Lufthansa Logo
6:00 pm - 3:15 pmIAD-OPO
16h 15m1 stop
Lufthansa Logo
6:00 am - 3:50 pmOPO-IAD
14h 50m1 stop
$497Lufthansa
Find Deal
dom., dic. 7 - mié., dic. 17
TAP AIR PORTUGAL Logo
5:45 pm - 10:55 amIAD-OPO
12h 10m1 stop
TAP AIR PORTUGAL Logo
11:00 am - 8:50 pmOPO-IAD
14h 50m1 stop
$498TAP AIR PORTUGAL
Find Deal
dom., sep. 7 - mar., sep. 23
United Airlines Logo
10:56 am - 9:30 amBWI-OPO
17h 34m2 stops
United Airlines Logo
12:35 pm - 9:59 amOPO-BWI
26h 24m2 stops
$498United Airlines
Find Deal
lun., nov. 17 - mié., nov. 26
TAP AIR PORTUGAL Logo
10:30 pm - 6:00 pmIAD-OPO
14h 30m1 stop
TAP AIR PORTUGAL Logo
6:55 am - 3:15 pmOPO-IAD
13h 20m1 stop
$505TAP AIR PORTUGAL
Find Deal
vie., nov. 7 - sáb., nov. 15
United Airlines Logo
8:50 am - 3:45 pmIAD-OPO
25h 55m2 stops
United Airlines Logo
6:00 am - 5:30 pmOPO-IAD
16h 30m2 stops
$517United Airlines
Find Deal
mar., oct. 21 - mar., nov. 4
Delta Logo
2:10 pm - 10:30 amBWI-OPO
15h 20m2 stops
Delta Logo
11:25 am - 10:56 pmOPO-BWI
16h 31m2 stops
$636Delta
Find Deal
dom., dic. 7 - mar., dic. 16
Delta Logo
2:10 pm - 10:30 amBWI-OPO
15h 20m2 stops
Delta Logo
11:25 am - 10:56 pmOPO-BWI
16h 31m2 stops
$637Delta
Find Deal
dom., dic. 7 - mié., dic. 17

TAP AIR PORTUGAL flights from Washington, D.C. to Porto

Our best TAP AIR PORTUGAL deals on Washington, D.C. to Porto flight tickets
TAP AIR PORTUGAL
Sep 7
IAD5:45 pmWashington, D.C. Dulles Intl
12h 10m
1 stop
OPO10:55 amPorto
Sep 23
OPO11:00 amPorto
14h 50m
1 stop
IAD8:50 pmWashington, D.C. Dulles Intl
$498
Find similar
TAP AIR PORTUGAL
Nov 7
IAD10:30 pmWashington, D.C. Dulles Intl
14h 30m
1 stop
OPO6:00 pmPorto
Nov 15
OPO6:55 amPorto
13h 20m
1 stop
IAD3:15 pmWashington, D.C. Dulles Intl
$505
Find similar
TAP AIR PORTUGAL
Oct 12
IAD10:20 pmWashington, D.C. Dulles Intl
19h 40m
1 stop
OPO11:00 pmPorto
Oct 20
OPO10:35 pmPorto
21h 45m
1 stop
IAD3:20 pmWashington, D.C. Dulles Intl
$506
Find similar

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

Our best Scandinavian Airlines deals on Washington, D.C. to Porto flight tickets
Scandinavian Airlines
Aug 23
IAD10:05 pmWashington, D.C. Dulles Intl
19h 10m
2 stops
OPO10:15 pmPorto
Aug 27
OPO11:50 amPorto
13h 09m
1 stop
IAD7:59 pmWashington, D.C. Dulles Intl
$760
Find similar
Scandinavian Airlines
Aug 23
IAD10:05 pmWashington, D.C. Dulles Intl
19h 10m
2 stops
OPO10:15 pmPorto
Aug 27
OPO11:50 amPorto
13h 09m
1 stop
IAD7:59 pmWashington, D.C. Dulles Intl
$872
Find similar
Scandinavian Airlines
Aug 23
IAD10:05 pmWashington, D.C. Dulles Intl
19h 10m
2 stops
OPO10:15 pmPorto
Aug 27
OPO11:50 amPorto
13h 09m
1 stop
IAD7:59 pmWashington, D.C. Dulles Intl
$933
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 agosto 14, 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

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

vie. 9/26

5:00 pm-9:00 pm

2 stops23h 00m

Porto

vie. 10/3

10:30 pm-3:20 pm

2 stops21h 50m

$439

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

lun. 10/20

5:10 pm-9:45 am

1 stop11h 35m

Porto

mar. 11/4

6:00 am-3:50 pm

1 stop14h 50m

$480

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

mar. 10/21

10:20 pm-11:20 pm

1 stop20h 00m

Porto

mar. 11/4

6:00 am-3:50 pm

1 stop14h 50m

$493

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

dom. 12/7

6:00 pm-3:15 pm

1 stop16h 15m

Porto

mié. 12/17

6:00 am-3:50 pm

1 stop14h 50m

$497

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

dom. 9/7

5:45 pm-10:55 am

1 stop12h 10m

Porto

mar. 9/23

11:00 am-8:50 pm

1 stop14h 50m

$498

BaltimorePorto

BWI - OPO

BWIOPO

Baltimore/Washington

lun. 11/17

10:56 am-9:30 am

2 stops17h 34m

Porto

mié. 11/26

12:35 pm-9:59 am

2 stops26h 24m

$498

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

sáb. 11/15

6:55 am-3:15 pm

1 stop13h 20m

$505

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

mar. 10/21

8:50 am-3:45 pm

2 stops25h 55m

Porto

mar. 11/4

6:00 am-5:30 pm

2 stops16h 30m

$517

BaltimorePorto

BWI - OPO

BWIOPO

Baltimore/Washington

dom. 12/7

2:10 pm-10:30 am

2 stops15h 20m

Porto

mar. 12/16

11:25 am-10:56 pm

2 stops16h 31m

$636

BaltimorePorto

BWI - OPO

BWIOPO

Baltimore/Washington

dom. 12/7

2:10 pm-10:30 am

2 stops15h 20m

Porto

mié. 12/17

11:25 am-10:56 pm

2 stops16h 31m

$637

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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 $485. If you aren’t able to travel during the month of November, then book flights to Porto from Washington, D.C. during October instead. Flights to Porto in October, while not as cheap as those in November, still average around $568.

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 $628 on momondo.

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

You could potentially save up to 64% 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?

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

Best Price Found

$252

Fastest flight time

9h 16m

Direct flights

None

Airports in Porto

1 airport
The best one-way flight to Porto from Washington, D.C. in the past 72 hours is $252. The best round-trip flight deal from Washington, D.C. to Porto found on momondo in the last 72 hours is $439.
The fastest flight from Washington, D.C. to Porto takes 9h 16m
There are no direct flights from Washington, D.C. to Porto. Popular non-direct routes for this connection are Baltimore/Washington Airport - Porto Airport, 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

  • 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 16m.

  • 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
DeltaPriceFrom $418Free CancellationRating
8.0
7,980 reviews
Search Delta flights
KLMPriceFrom $424Free CancellationRating
7.8
1,381 reviews
Search KLM flights
TAP AIR PORTUGALPriceFrom $468Free CancellationRating
7.1
1,947 reviews
Search TAP AIR PORTUGAL flights
IberiaPriceFrom $515Free CancellationRating
7.0
2,878 reviews
Search Iberia flights
United AirlinesPriceFrom $520Free CancellationRating
7.4
8,916 reviews
Search United Airlines flights
American AirlinesPriceFrom $573Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
LufthansaPriceFrom $620Free CancellationRating
6.8
7,317 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
Aveiro
Coimbra
Braga
Matosinhos
Caminha
Lamego
Guimarães
Esposende
Chaves
Arcos de Valdevez
Espinho
Viseu
Ponte de Lima
Pinhao
Santa Maria da Feira
Curia
Penafiel
Mesao Frio
Baiao

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.

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
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
mar. 8/19
mar. 8/26
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Portugal