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Cheap flights from Porto to Washington, D.C. from $378

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 5/10. 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
1 adult, Economy, 0 bags

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

Cheap round-trip flights

Enter your travel dates to find the best prices.
TAP AIR PORTUGAL Logo
7:00 am - 3:10 pm
OPO
-
IAD
13h 10m
1 stop
TAP AIR PORTUGAL Logo
10:35 pm - 8:25 pm
IAD
-
OPO
16h 50m
1 stop
$560TAP AIR PORTUGAL
Fri, Apr 17 - Sat, Apr 25
TAP AIR PORTUGAL Logo
10:30 pm - 3:10 pm
OPO
-
IAD
21h 40m
1 stop
TAP AIR PORTUGAL Logo
10:35 pm - 3:00 pm
IAD
-
OPO
11h 25m
1 stop
$566TAP AIR PORTUGAL
Mon, Apr 13 - Sun, Apr 26
Multiple Airlines Logo
6:00 am - 3:05 pm
OPO
-
IAD
14h 05m
1 stop
Multiple Airlines Logo
8:20 pm - 6:30 pm
IAD
-
OPO
17h 10m
1 stop
$631Multiple Airlines
Fri, Apr 17 - Fri, Apr 24
Multiple Airlines Logo
6:00 am - 4:05 pm
OPO
-
IAD
15h 05m
1 stop
Multiple Airlines Logo
8:20 pm - 6:30 pm
IAD
-
OPO
17h 10m
1 stop
$637Multiple Airlines
Wed, Apr 22 - Wed, Apr 29
Delta Logo
11:25 am - 11:40 pm
OPO
-
DCA
17h 15m
2 stops
Delta Logo
5:00 pm - 3:25 pm
DCA
-
OPO
17h 25m
2 stops
$681Delta
Mon, Apr 13 - Sun, Apr 26
Delta Logo
11:25 am - 11:40 pm
OPO
-
DCA
17h 15m
2 stops
Delta Logo
5:00 pm - 3:25 pm
DCA
-
OPO
17h 25m
2 stops
$682Delta
Mon, Apr 13 - Sun, Apr 26
United Airlines Logo
11:50 am - 3:38 pm
OPO
-
DCA
32h 48m
1 stop
United Airlines Logo
3:05 pm - 6:55 am
DCA
-
OPO
10h 50m
1 stop
$693United Airlines
Thu, Sep 3 - Sun, Sep 6
United Airlines Logo
6:00 am - 5:25 pm
OPO
-
DCA
16h 25m
2 stops
United Airlines Logo
6:00 pm - 9:45 am
DCA
-
OPO
10h 45m
1 stop
$694United Airlines
Fri, Apr 10 - Mon, Apr 20
Air Canada Logo
11:50 am - 10:18 am
OPO
-
DCA
27h 28m
1 stop
Air Canada Logo
9:40 am - 6:15 pm
DCA
-
OPO
27h 35m
2 stops
$696Air Canada
Thu, Sep 3 - Sun, Sep 6
Air Canada Logo
11:50 am - 9:48 pm
OPO
-
DCA
14h 58m
1 stop
Air Canada Logo
6:00 am - 12:00 pm
DCA
-
OPO
25h 00m
2 stops
$697Air Canada
Thu, Sep 3 - Sun, Sep 6

KLM flights from Porto to Washington, D.C.

Our best KLM deals on Porto to Washington, D.C. flight tickets
KLM
Apr 21
OPO5:00 amPorto
15h 35m
1 stop
IAD3:35 pmWashington, D.C. Dulles Intl
Apr 29
IAD9:45 pmWashington, D.C. Dulles Intl
19h 15m
1 stop
OPO10:00 pmPorto
$673
KLM
Apr 21
OPO5:00 amPorto
15h 35m
1 stop
IAD3:35 pmWashington, D.C. Dulles Intl
Apr 29
IAD9:45 pmWashington, D.C. Dulles Intl
19h 15m
1 stop
OPO10:00 pmPorto
$676
KLM
May 18
OPO4:20 pmPorto
28h 15m
1 stop
IAD3:35 pmWashington, D.C. Dulles Intl
Jun 8
IAD9:45 pmWashington, D.C. Dulles Intl
19h 15m
1 stop
OPO10:00 pmPorto
$678

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

Our best TAP AIR PORTUGAL deals on Porto to Washington, D.C. flight tickets
TAP AIR PORTUGAL
Apr 13
OPO10:30 pmPorto
21h 40m
1 stop
IAD3:10 pmWashington, D.C. Dulles Intl
Apr 26
IAD10:35 pmWashington, D.C. Dulles Intl
11h 25m
1 stop
OPO3:00 pmPorto
$566
TAP AIR PORTUGAL
Apr 13
OPO10:30 pmPorto
21h 40m
1 stop
IAD3:10 pmWashington, D.C. Dulles Intl
Apr 26
IAD10:35 pmWashington, D.C. Dulles Intl
11h 25m
1 stop
OPO3:00 pmPorto
$572

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 March 25, 2026.
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

Cheapest round-trip

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Fri 4/17

7:00 am-3:10 pm

1 stop13h 10m

Washington, D.C. Dulles Intl

Sat 4/25

10:35 pm-8:25 pm

1 stop16h 50m

$560

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Mon 4/13

10:30 pm-3:10 pm

1 stop21h 40m

Washington, D.C. Dulles Intl

Sun 4/26

10:35 pm-3:00 pm

1 stop11h 25m

$566

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Fri 4/17

6:00 am-3:05 pm

1 stop14h 05m

Washington, D.C. Dulles Intl

Fri 4/24

8:20 pm-6:30 pm

1 stop17h 10m

$631

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Wed 4/22

6:00 am-4:05 pm

1 stop15h 05m

Washington, D.C. Dulles Intl

Wed 4/29

8:20 pm-6:30 pm

1 stop17h 10m

$637

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

Mon 4/13

11:25 am-11:40 pm

2 stops17h 15m

Washington, D.C. Reagan-National

Sun 4/26

5:00 pm-3:25 pm

2 stops17h 25m

$681

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

Mon 4/13

11:25 am-11:40 pm

2 stops17h 15m

Washington, D.C. Reagan-National

Sun 4/26

5:00 pm-3:25 pm

2 stops17h 25m

$682

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

Thu 9/3

11:50 am-3:38 pm

1 stop32h 48m

Washington, D.C. Reagan-National

Sun 9/6

3:05 pm-6:55 am

1 stop10h 50m

$693
Quickest round-trip

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

Fri 4/10

6:00 am-5:25 pm

2 stops16h 25m

Washington, D.C. Reagan-National

Mon 4/20

6:00 pm-9:45 am

1 stop10h 45m

$694

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

Thu 9/3

11:50 am-10:18 am

1 stop27h 28m

Washington, D.C. Reagan-National

Sun 9/6

9:40 am-6:15 pm

2 stops27h 35m

$696

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

Thu 9/3

11:50 am-9:48 pm

1 stop14h 58m

Washington, D.C. Reagan-National

Sun 9/6

6:00 am-12:00 pm

2 stops25h 00m

$697

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

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

You could potentially save up to 2% 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.

Fastest flight time

13h 05m

Direct flights

None
The fastest flight from Porto to Washington, D.C. takes 13h 05m
There are no direct flights from Porto to Washington, D.C.. There are no popular flight routes from Porto to Washington, D.C..
Search flight deals

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

    Porto and Washington, D.C. are 3523.1 mi apart from one another. 13h 05m 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.

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
2,176 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
National Harbor
Gettysburg
Arlington
Waldorf
Woodbridge
Laurel
Colonial Beach
Gaithersburg
Towson
Silver Spring
Fredericksburg
Rockville
Tysons
Manassas
Linthicum Heights
Springfield
Bethesda
Fairfax
College Park

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