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Cheap flights from Porto to Washington, D.C. from $348

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

Cheap round-trip flights

PLAY Logo
9:20 pm - 5:40 pmOPO-BWI
25h 20m1 stop
PLAY Logo
6:50 pm - 8:05 pmBWI-OPO
20h 15m1 stop
$422PLAY
Find Deal
Thu, Sep 11 - Sat, Sep 27
PLAY Logo
9:20 pm - 5:40 pmOPO-BWI
25h 20m1 stop
PLAY Logo
6:50 pm - 8:05 pmBWI-OPO
20h 15m1 stop
$430PLAY
Find Deal
Thu, Sep 11 - Sat, Sep 27
Scandinavian Airlines Logo
5:45 pm - 6:50 pmOPO-IAD
30h 05m1 stop
Scandinavian Airlines Logo
8:30 pm - 4:55 pmIAD-OPO
15h 25m1 stop
$467Scandinavian Airlines
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Fri, Nov 21 - Thu, Dec 4
TAP AIR PORTUGAL Logo
11:00 am - 8:50 pmOPO-IAD
14h 50m1 stop
TAP AIR PORTUGAL Logo
5:00 pm - 10:00 amIAD-OPO
12h 00m1 stop
$485TAP AIR PORTUGAL
Find Deal
Thu, Sep 11 - Sat, Sep 27
TAP AIR PORTUGAL Logo
11:00 am - 8:50 pmOPO-IAD
14h 50m1 stop
TAP AIR PORTUGAL Logo
5:00 pm - 8:00 amIAD-OPO
10h 00m1 stop
$497TAP AIR PORTUGAL
Find Deal
Wed, Oct 8 - Tue, Oct 21
TAP AIR PORTUGAL Logo
8:55 am - 3:15 pmOPO-IAD
11h 20m1 stop
TAP AIR PORTUGAL Logo
5:30 pm - 2:00 pmIAD-OPO
15h 30m1 stop
$503TAP AIR PORTUGAL
Find Deal
Sat, Nov 22 - Sat, Dec 6
TAP AIR PORTUGAL Logo
11:00 am - 8:50 pmOPO-IAD
14h 50m1 stop
TAP AIR PORTUGAL Logo
10:35 pm - 8:25 pmIAD-OPO
16h 50m1 stop
$508TAP AIR PORTUGAL
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Thu, Sep 11 - Sat, Sep 27
Lufthansa Logo
6:00 am - 3:50 pmOPO-IAD
14h 50m1 stop
Lufthansa Logo
6:00 pm - 3:05 pmIAD-OPO
16h 05m1 stop
$561Lufthansa
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Wed, Dec 24 - Sat, Jan 3
Lufthansa Logo
6:00 am - 3:50 pmOPO-IAD
14h 50m1 stop
Lufthansa Logo
6:00 pm - 3:05 pmIAD-OPO
16h 05m1 stop
$567Lufthansa
Find Deal
Wed, Dec 24 - Sat, Jan 3
KLM Logo
6:00 am - 4:37 pmOPO-BWI
15h 37m2 stops
KLM Logo
2:07 pm - 10:30 amBWI-OPO
15h 23m2 stops
$668KLM
Find Deal
Wed, Dec 24 - Sat, Jan 3

PLAY flights from Porto to Washington, D.C.

Our best PLAY deals on Porto to Washington, D.C. flight tickets
PLAY
Sep 11
OPO9:20 pmPorto
25h 20m
1 stop
BWI5:40 pmBaltimore/Washington
Sep 27
BWI6:50 pmBaltimore/Washington
20h 15m
1 stop
OPO8:05 pmPorto
$422
Find similar
PLAY
Sep 11
OPO9:20 pmPorto
25h 20m
1 stop
BWI5:40 pmBaltimore/Washington
Sep 27
BWI6:50 pmBaltimore/Washington
20h 15m
1 stop
OPO8:05 pmPorto
$430
Find similar

British Airways flights from Porto to Washington, D.C.

Our best British Airways deals on Porto to Washington, D.C. flight tickets
British Airways
Nov 22
OPO8:20 amPorto
16h 10m
2 stops
BWI7:30 pmBaltimore/Washington
Dec 6
BWI8:35 pmBaltimore/Washington
17h 40m
1 stop
OPO7:15 pmPorto
$646
Find similar
British Airways
Sep 11
OPO9:55 amPorto
14h 50m
1 stop
BWI7:45 pmBaltimore/Washington
Sep 27
BWI9:35 pmBaltimore/Washington
18h 00m
1 stop
OPO8:35 pmPorto
$666
Find similar
British Airways
Nov 22
OPO8:05 pmPorto
27h 40m
1 stop
BWI6:45 pmBaltimore/Washington
Dec 6
BWI8:35 pmBaltimore/Washington
17h 40m
1 stop
OPO7:15 pmPorto
$673
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momondo Fare Finder

 
Customize your flight search to find flights from Porto to Washington, D.C. 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 August 14, 2025.
Use the filters below to find and compare flights from Porto to Washington, D.C. that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

PortoBaltimore

OPO - BWI

OPOBWI

Porto

Thu 9/11

9:20 pm-5:40 pm

1 stop25h 20m

Baltimore/Washington

Sat 9/27

6:50 pm-8:05 pm

1 stop20h 15m

$422

PortoBaltimore

OPO - BWI

OPOBWI

Porto

Thu 9/11

9:20 pm-5:40 pm

1 stop25h 20m

Baltimore/Washington

Sat 9/27

6:50 pm-8:05 pm

1 stop20h 15m

$430

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Fri 11/21

5:45 pm-6:50 pm

1 stop30h 05m

Washington, D.C. Dulles Intl

Thu 12/4

8:30 pm-4:55 pm

1 stop15h 25m

$467

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Thu 9/11

11:00 am-8:50 pm

1 stop14h 50m

Washington, D.C. Dulles Intl

Sat 9/27

5:00 pm-10:00 am

1 stop12h 00m

$485

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Wed 10/8

11:00 am-8:50 pm

1 stop14h 50m

Washington, D.C. Dulles Intl

Tue 10/21

5:00 pm-8:00 am

1 stop10h 00m

$497

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Sat 11/22

8:55 am-3:15 pm

1 stop11h 20m

Washington, D.C. Dulles Intl

Sat 12/6

5:30 pm-2:00 pm

1 stop15h 30m

$503

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Thu 9/11

11:00 am-8:50 pm

1 stop14h 50m

Washington, D.C. Dulles Intl

Sat 9/27

10:35 pm-8:25 pm

1 stop16h 50m

$508

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Wed 12/24

6:00 am-3:50 pm

1 stop14h 50m

Washington, D.C. Dulles Intl

Sat 1/3

6:00 pm-3:05 pm

1 stop16h 05m

$561

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Wed 12/24

6:00 am-3:50 pm

1 stop14h 50m

Washington, D.C. Dulles Intl

Sat 1/3

6:00 pm-3:05 pm

1 stop16h 05m

$567

PortoBaltimore

OPO - BWI

OPOBWI

Porto

Wed 12/24

6:00 am-4:37 pm

2 stops15h 37m

Baltimore/Washington

Sat 1/3

2:07 pm-10:30 am

2 stops15h 23m

$668

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 Washington, D.C. from

How to get the cheapest flight ticket from Porto to Washington, D.C.

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 day to depart on your flight to Washington, D.C.?

On average, the least expensive day to fly to Washington, D.C. from Porto is on a Thursday. momondo users have found tickets for Thursday departures for as low as $616. However, this price may fluctuate depending on the airline, the season, and holidays. When flying out on a Saturday, the most expensive travel day of the week, you can expect to see flight prices from Porto to Washington, D.C. for around $1,018.

What is the cheapest time of day to depart on your flight to Washington, D.C.?

In the morning is the cheapest time of day to fly from Porto to Washington, D.C. when you can find flight prices for as low as $735. Flying to Washington, D.C. in the morning is an ideal time because this is during off-peak travel hours. Try not to purchase tickets in the afternoon because they tend to be around $1,068. Of course, these prices can vary depending on the time of year and what airport you fly to.

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

You could potentially save up to 16% on your flight if you consider stops on a Porto to Washington, D.C. flight.

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

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

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

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

Best Price Found

$348

Fastest flight time

11h 07m

Direct flights

None

Airports in Washington, D.C.

3 airports
The best one-way flight to Washington, D.C. from Porto in the past 72 hours is $348. The best round-trip flight deal from Porto to Washington, D.C. found on momondo in the last 72 hours is $422.
The fastest flight from Porto to Washington, D.C. takes 11h 07m
There are no direct flights from Porto to Washington, D.C.. Popular non-direct routes for this connection are Porto Airport - Washington, D.C. Reagan-National Airport, Porto Airport - Baltimore/Washington Airport and Porto Airport - Washington, D.C. Dulles Intl Airport.
There are 3 airports near Washington, D.C.: Washington, D.C. Reagan-National (DCA), Baltimore/Washington (BWI), Washington, D.C. Dulles Intl (IAD)
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  • How far is Porto to Washington, D.C. by plane?

    Porto and Washington, D.C. are 3523.1 mi apart from one another. 11h 07m is a normal flight duration for this route.

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

    Prices for flights from Porto Airport to Washington, D.C. refresh daily.

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

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

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Porto Airport to Washington, D.C..

  • What documentation or ID do you need to fly to Washington, D.C.?

    The necessary travel and health documents for your Washington, D.C. 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.

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

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

Compare and see reviews for airlines that fly from Porto to Washington, D.C. with momondo
Airline
Rating
Free Cancellation
Price
TAP AIR PORTUGALPriceFrom $492Free CancellationRating
7.1
1,947 reviews
Search TAP AIR PORTUGAL flights

Traveling to a place near Washington, D.C.?

Book flights to Washington, D.C. if you plan to visit one of these locations
Alexandria
Gettysburg
Arlington
National Harbor
Woodbridge
Tysons
Laurel
Silver Spring
Waldorf
Fredericksburg
Colonial Beach
Manassas
Rockville
Towson
Gaithersburg
Fairfax
Reston
Glen Burnie
Linthicum Heights
Springfield

Why use momondo?

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

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Porto to Washington, D.C.. Millions of users trust and use momondo every year so you are in good hands.

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

Yes. momondo enables you to select and highlight flights to Washington, D.C. from Porto with this policy.

How can momondo help me find flights from Porto to Washington, D.C.?

Once all potential Porto to Washington, D.C. flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

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

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Find better results for your trip to the United States

Fly into one of these airports located in Washington, D.C.

Airports listed have a maximum distance of 22.4 mi from Washington, D.C.
Washington, D.C. Reagan-National Airport
Washington, D.C. Dulles Intl Airport