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Cheap flights from Porto to Washington, D.C. from $341

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 9/1. 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

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

Cheap round-trip flights

Enter your travel dates to find the best prices.
American Airlines Logo
8:20 am - 10:07 am
OPO
-
BWI
30h 47m
2 stops
American Airlines Logo
7:25 pm - 7:40 am
BWI
-
OPO
31h 15m
2 stops
$622American Airlines
Mon, Sep 21 - Tue, Sep 29
American Airlines Logo
8:20 am - 1:05 pm
OPO
-
BWI
33h 45m
2 stops
American Airlines Logo
2:08 pm - 4:00 pm
BWI
-
OPO
20h 52m
2 stops
$624American Airlines
Mon, Sep 21 - Thu, Oct 1
Delta Logo
5:00 am - 5:27 pm
OPO
-
BWI
17h 27m
2 stops
Delta Logo
1:55 pm - 3:25 pm
BWI
-
OPO
20h 30m
2 stops
$627Delta
Tue, Sep 22 - Mon, Sep 28
Iberia Logo
10:00 pm - 5:15 pm
OPO
-
BWI
24h 15m
2 stops
Iberia Logo
9:30 pm - 8:00 pm
BWI
-
OPO
17h 30m
2 stops
$632Iberia
Tue, Sep 22 - Mon, Sep 28
Iberia Logo
12:25 pm - 10:57 pm
OPO
-
DCA
15h 32m
2 stops
Iberia Logo
5:45 pm - 11:45 am
DCA
-
OPO
13h 00m
2 stops
$643Iberia
Mon, Oct 5 - Tue, Dec 1
Lufthansa Logo
6:00 am - 4:05 pm
OPO
-
IAD
15h 05m
1 stop
Lufthansa Logo
5:55 pm - 11:15 am
IAD
-
OPO
12h 20m
1 stop
$645Lufthansa
Mon, Sep 21 - Mon, Sep 28
Lufthansa Logo
6:00 am - 4:05 pm
OPO
-
IAD
15h 05m
1 stop
Lufthansa Logo
5:55 pm - 3:45 pm
IAD
-
OPO
16h 50m
1 stop
$672Lufthansa
Mon, Sep 21 - Tue, Sep 29
Delta Logo
12:15 pm - 10:59 pm
OPO
-
DCA
15h 44m
1 stop
Delta Logo
11:00 am - 10:35 am
DCA
-
OPO
18h 35m
2 stops
$687Delta
Mon, Oct 5 - Tue, Dec 1
Multiple Airlines Logo
6:00 am - 4:05 pm
OPO
-
IAD
15h 05m
1 stop
Multiple Airlines Logo
5:45 pm - 5:45 pm
IAD
-
OPO
19h 00m
1 stop
$695Multiple Airlines
Fri, Jul 24 - Sat, Sep 5
Multiple Airlines Logo
12:25 pm - 6:55 pm
OPO
-
IAD
11h 30m
1 stop
Multiple Airlines Logo
5:45 pm - 8:30 pm
IAD
-
OPO
21h 45m
1 stop
$701Multiple Airlines
Thu, Jul 9 - Thu, Jul 23

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KLM flights from Porto to Washington, D.C.

Our best KLM deals on Porto to Washington, D.C. flight tickets
KLM
Jul 24
OPO5:00 amPorto
15h 35m
1 stop
IAD3:35 pmWashington, D.C. Dulles Intl
Aug 11
IAD9:45 pmWashington, D.C. Dulles Intl
12h 40m
1 stop
OPO3:25 pmPorto
$703
KLM
Aug 1
OPO9:25 amPorto
18h 53m
2 stops
BWI11:18 pmBaltimore/Washington
Aug 29
BWI1:00 pmBaltimore/Washington
16h 55m
2 stops
OPO10:55 amPorto
$723
KLM
Aug 1
OPO6:30 amPorto
18h 05m
1 stop
IAD7:35 pmWashington, D.C. Dulles Intl
Aug 8
IAD9:45 pmWashington, D.C. Dulles Intl
19h 15m
1 stop
OPO10:00 pmPorto
$767

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

Our best American Airlines deals on Porto to Washington, D.C. flight tickets
American Airlines
Sep 21
OPO8:20 amPorto
30h 47m
2 stops
BWI10:07 amBaltimore/Washington
Sep 29
BWI7:25 pmBaltimore/Washington
31h 15m
2 stops
OPO7:40 amPorto
$622
American Airlines
Sep 21
OPO8:20 amPorto
33h 45m
2 stops
BWI1:05 pmBaltimore/Washington
Oct 1
BWI2:08 pmBaltimore/Washington
20h 52m
2 stops
OPO4:00 pmPorto
$624
American Airlines
Sep 24
OPO12:25 pmPorto
35h 05m
2 stops
BWI6:30 pmBaltimore/Washington
Sep 29
BWI7:25 pmBaltimore/Washington
31h 15m
2 stops
OPO7:40 amPorto
$629

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 June 28, 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

PortoBaltimore

OPO - BWI

OPOBWI

Porto

Mon 9/21

8:20 am-10:07 am

2 stops30h 47m

Baltimore/Washington

Tue 9/29

7:25 pm-7:40 am

2 stops31h 15m

$622

PortoBaltimore

OPO - BWI

OPOBWI

Porto

Mon 9/21

8:20 am-1:05 pm

2 stops33h 45m

Baltimore/Washington

Thu 10/1

2:08 pm-4:00 pm

2 stops20h 52m

$624

PortoBaltimore

OPO - BWI

OPOBWI

Porto

Tue 9/22

5:00 am-5:27 pm

2 stops17h 27m

Baltimore/Washington

Mon 9/28

1:55 pm-3:25 pm

2 stops20h 30m

$627

PortoBaltimore

OPO - BWI

OPOBWI

Porto

Tue 9/22

10:00 pm-5:15 pm

2 stops24h 15m

Baltimore/Washington

Mon 9/28

9:30 pm-8:00 pm

2 stops17h 30m

$632

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

Mon 10/5

12:25 pm-10:57 pm

2 stops15h 32m

Washington, D.C. Reagan-National

Tue 12/1

5:45 pm-11:45 am

2 stops13h 00m

$643
Quickest round-trip

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Mon 9/21

6:00 am-4:05 pm

1 stop15h 05m

Washington, D.C. Dulles Intl

Mon 9/28

5:55 pm-11:15 am

1 stop12h 20m

$645

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Mon 9/21

6:00 am-4:05 pm

1 stop15h 05m

Washington, D.C. Dulles Intl

Tue 9/29

5:55 pm-3:45 pm

1 stop16h 50m

$672

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

Mon 10/5

12:15 pm-10:59 pm

1 stop15h 44m

Washington, D.C. Reagan-National

Tue 12/1

11:00 am-10:35 am

2 stops18h 35m

$687

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Fri 7/24

6:00 am-4:05 pm

1 stop15h 05m

Washington, D.C. Dulles Intl

Sat 9/5

5:45 pm-5:45 pm

1 stop19h 00m

$695

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Thu 7/9

12:25 pm-6:55 pm

1 stop11h 30m

Washington, D.C. Dulles Intl

Thu 7/23

5:45 pm-8:30 pm

1 stop21h 45m

$701

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 month to fly to Washington, D.C.?

The month of March is, on average, the cheapest month to fly to Washington, D.C. from Porto, with most prices found around $422. If you’re not able to fly to Washington, D.C. in March, then October is your next best option. Flight prices from Porto to Washington, D.C. during October average around $481.

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

You could potentially save up to 6% 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

12h 57m

Direct flights

None
The fastest flight from Porto to Washington, D.C. takes 12h 57m
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

Frequently asked questions about flying from Porto to Washington, D.C.

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

    Porto and Washington, D.C. are 3523.1 mi apart from one another. 12h 57m 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 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.?

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
Arlington
Gettysburg
Waldorf
Laurel
Woodbridge
Fredericksburg
Gaithersburg
Colonial Beach
Linthicum Heights
Rockville
Silver Spring
Towson
Manassas
Tysons
Springfield
Fairfax
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