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Cheap flights from Porto to Washington, D.C. from $331

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 5/8. 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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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
9:00 am - 3:05 pm
OPO
-
IAD
11h 05m
1 stop
TAP AIR PORTUGAL Logo
10:35 pm - 11:10 pm
IAD
-
OPO
19h 35m
1 stop
$504TAP AIR PORTUGAL
Tue, Apr 21 - Wed, Apr 29
TAP AIR PORTUGAL Logo
7:00 am - 3:05 pm
OPO
-
IAD
13h 05m
1 stop
TAP AIR PORTUGAL Logo
10:35 pm - 8:25 pm
IAD
-
OPO
16h 50m
1 stop
$532TAP AIR PORTUGAL
Tue, Apr 21 - Wed, Apr 29
Delta Logo
5:00 am - 3:35 pm
OPO
-
IAD
15h 35m
1 stop
Delta Logo
9:45 pm - 10:05 pm
IAD
-
OPO
19h 20m
1 stop
$568Delta
Tue, May 5 - Tue, May 12
Multiple Airlines Logo
7:00 pm - 3:35 pm
OPO
-
IAD
25h 35m
1 stop
Multiple Airlines Logo
9:45 pm - 10:05 pm
IAD
-
OPO
19h 20m
1 stop
$569Multiple Airlines
Mon, May 4 - Tue, May 12
Air France Logo
6:30 am - 4:05 pm
OPO
-
IAD
14h 35m
1 stop
Air France Logo
9:45 pm - 3:25 pm
IAD
-
OPO
12h 40m
1 stop
$571Air France
Sat, May 2 - Mon, May 18
Delta Logo
5:00 am - 6:08 pm
OPO
-
IAD
18h 08m
2 stops
Delta Logo
9:45 pm - 10:05 pm
IAD
-
OPO
19h 20m
1 stop
$573Delta
Tue, May 5 - Tue, May 12
KLM Logo
7:00 pm - 3:35 pm
OPO
-
IAD
25h 35m
1 stop
KLM Logo
6:10 pm - 3:30 pm
IAD
-
OPO
16h 20m
1 stop
$576KLM
Mon, May 4 - Mon, May 11
Delta Logo
6:15 am - 11:03 pm
OPO
-
IAD
21h 48m
2 stops
Delta Logo
9:45 pm - 10:00 pm
IAD
-
OPO
19h 15m
1 stop
$582Delta
Tue, Apr 21 - Wed, Apr 29
KLM Logo
5:00 am - 3:35 pm
OPO
-
IAD
15h 35m
1 stop
KLM Logo
9:45 pm - 10:00 pm
IAD
-
OPO
19h 15m
1 stop
$586KLM
Thu, Apr 2 - Sat, Apr 11
Multiple Airlines Logo
8:20 am - 7:22 pm
OPO
-
BWI
16h 02m
2 stops
Multiple Airlines Logo
9:35 pm - 8:20 pm
BWI
-
OPO
17h 45m
1 stop
$631Multiple Airlines
Fri, May 1 - Sun, May 17

Air Canada flights from Porto to Washington, D.C.

Our best Air Canada deals on Porto to Washington, D.C. flight tickets
Air Canada
Apr 16
OPO6:00 amPorto
19h 29m
2 stops
IAD8:29 pmWashington, D.C. Dulles Intl
Apr 19
IAD9:55 amWashington, D.C. Dulles Intl
27h 35m
2 stops
OPO6:30 pmPorto
$629
Air Canada
Apr 15
OPO6:00 amPorto
18h 53m
2 stops
DCA7:53 pmWashington, D.C. Reagan-National
Apr 19
DCA11:05 amWashington, D.C. Reagan-National
26h 25m
2 stops
OPO6:30 pmPorto
$631
Air Canada
Apr 16
OPO6:00 amPorto
19h 29m
2 stops
IAD8:29 pmWashington, D.C. Dulles Intl
Apr 19
IAD12:40 pmWashington, D.C. Dulles Intl
24h 50m
2 stops
OPO6:30 pmPorto
$673

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 21
OPO9:00 amPorto
11h 05m
1 stop
IAD3:05 pmWashington, D.C. Dulles Intl
Apr 29
IAD10:35 pmWashington, D.C. Dulles Intl
19h 35m
1 stop
OPO11:10 pmPorto
$504
TAP AIR PORTUGAL
Apr 21
OPO5:05 amPorto
15h 00m
1 stop
IAD3:05 pmWashington, D.C. Dulles Intl
Apr 29
IAD10:35 pmWashington, D.C. Dulles Intl
15h 25m
1 stop
OPO7:00 pmPorto
$532
TAP AIR PORTUGAL
Apr 15
OPO9:00 amPorto
14h 57m
2 stops
DCA6:57 pmWashington, D.C. Reagan-National
Apr 19
DCA11:00 amWashington, D.C. Reagan-National
18h 55m
1 stop
OPO10:55 amPorto
$1,124

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 February 6, 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

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Tue 4/21

9:00 am-3:05 pm

1 stop11h 05m

Washington, D.C. Dulles Intl

Wed 4/29

10:35 pm-11:10 pm

1 stop19h 35m

$504

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Tue 4/21

7:00 am-3:05 pm

1 stop13h 05m

Washington, D.C. Dulles Intl

Wed 4/29

10:35 pm-8:25 pm

1 stop16h 50m

$532

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Tue 5/5

5:00 am-3:35 pm

1 stop15h 35m

Washington, D.C. Dulles Intl

Tue 5/12

9:45 pm-10:05 pm

1 stop19h 20m

$568

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Mon 5/4

7:00 pm-3:35 pm

1 stop25h 35m

Washington, D.C. Dulles Intl

Tue 5/12

9:45 pm-10:05 pm

1 stop19h 20m

$569

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Sat 5/2

6:30 am-4:05 pm

1 stop14h 35m

Washington, D.C. Dulles Intl

Mon 5/18

9:45 pm-3:25 pm

1 stop12h 40m

$571

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Tue 5/5

5:00 am-6:08 pm

2 stops18h 08m

Washington, D.C. Dulles Intl

Tue 5/12

9:45 pm-10:05 pm

1 stop19h 20m

$573

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Mon 5/4

7:00 pm-3:35 pm

1 stop25h 35m

Washington, D.C. Dulles Intl

Mon 5/11

6:10 pm-3:30 pm

1 stop16h 20m

$576

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Tue 4/21

6:15 am-11:03 pm

2 stops21h 48m

Washington, D.C. Dulles Intl

Wed 4/29

9:45 pm-10:00 pm

1 stop19h 15m

$582

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Thu 4/2

5:00 am-3:35 pm

1 stop15h 35m

Washington, D.C. Dulles Intl

Sat 4/11

9:45 pm-10:00 pm

1 stop19h 15m

$586

PortoBaltimore

OPO - BWI

OPOBWI

Porto

Fri 5/1

8:20 am-7:22 pm

2 stops16h 02m

Baltimore/Washington

Sun 5/17

9:35 pm-8:20 pm

1 stop17h 45m

$631

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 56% 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

11h 56m

Direct flights

None
The fastest flight from Porto to Washington, D.C. takes 11h 56m
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. 11h 56m 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
2,135 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
Tysons
Laurel
Colonial Beach
Silver Spring
Towson
Fredericksburg
Gaithersburg
Rockville
Manassas
Springfield
Fairfax
Linthicum Heights
Bethesda
Glen Burnie

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