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Cheap flights from Porto to Washington, D.C. from $339

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 12/18. 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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Scandinavian Airlines Logo
5:35 pm - 6:50 pmOPO-IAD
30h 15m1 stop
Scandinavian Airlines Logo
8:30 pm - 4:55 pmIAD-OPO
15h 25m1 stop
$519Scandinavian Airlines
Find Deal
sex, nov 21 - qui, dez 4
TAP AIR PORTUGAL Logo
9:00 am - 3:15 pmOPO-IAD
11h 15m1 stop
TAP AIR PORTUGAL Logo
10:30 pm - 3:55 pmIAD-OPO
12h 25m1 stop
$565TAP AIR PORTUGAL
Find Deal
qui, dez 11 - sex, dez 26
KLM Logo
6:00 am - 4:05 pmOPO-IAD
15h 05m1 stop
KLM Logo
6:30 pm - 3:30 pmIAD-OPO
16h 00m1 stop
$572KLM
Find Deal
sáb, nov 22 - dom, abr 5
Delta Logo
6:30 am - 4:05 pmOPO-IAD
14h 35m1 stop
Delta Logo
6:50 pm - 10:30 amIAD-OPO
10h 40m1 stop
$573Delta
Find Deal
seg, nov 24 - seg, dez 1
Delta Logo
6:30 am - 10:56 pmOPO-DCA
21h 26m2 stops
Delta Logo
11:13 am - 10:25 amDCA-OPO
18h 12m2 stops
$577Delta
Find Deal
sex, nov 21 - qui, dez 4
KLM Logo
6:30 am - 7:08 pmOPO-IAD
17h 38m2 stops
KLM Logo
6:30 pm - 3:30 pmIAD-OPO
16h 00m1 stop
$582KLM
Find Deal
sex, nov 21 - dom, abr 5
United Airlines Logo
6:00 am - 3:50 pmOPO-IAD
14h 50m1 stop
United Airlines Logo
5:20 pm - 9:45 amIAD-OPO
11h 25m1 stop
$584United Airlines
Find Deal
qui, nov 20 - qui, abr 2
Multiple Airlines Logo
6:00 am - 3:50 pmOPO-IAD
14h 50m1 stop
Multiple Airlines Logo
8:45 pm - 6:30 pmIAD-OPO
16h 45m1 stop
$587Multiple Airlines
Find Deal
sáb, nov 22 - dom, abr 5
Multiple Airlines Logo
6:00 am - 3:50 pmOPO-IAD
14h 50m1 stop
Multiple Airlines Logo
8:45 pm - 6:30 pmIAD-OPO
16h 45m1 stop
$589Multiple Airlines
Find Deal
dom, nov 23 - sáb, abr 4
United Airlines Logo
6:00 am - 11:49 amOPO-IAD
34h 49m2 stops
United Airlines Logo
12:50 pm - 11:40 amIAD-OPO
17h 50m2 stops
$594United Airlines
Find Deal
qui, nov 27 - qui, dez 4

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
Dec 11
OPO9:00 amPorto
11h 15m
1 stop
IAD3:15 pmWashington, D.C. Dulles Intl
Dec 26
IAD10:30 pmWashington, D.C. Dulles Intl
12h 25m
1 stop
OPO3:55 pmPorto
$565
Find similar
TAP AIR PORTUGAL
Apr 1
OPO9:00 amPorto
14h 59m
2 stops
DCA6:59 pmWashington, D.C. Reagan-National
Apr 5
DCA7:00 pmWashington, D.C. Reagan-National
11h 05m
1 stop
OPO11:05 amPorto
$1,236
Find similar
TAP AIR PORTUGAL
Apr 1
OPO9:00 amPorto
14h 59m
2 stops
DCA6:59 pmWashington, D.C. Reagan-National
Apr 5
DCA5:55 pmWashington, D.C. Reagan-National
12h 00m
1 stop
OPO10:55 amPorto
$1,237
Find similar

KLM flights from Porto to Washington, D.C.

Our best KLM deals on Porto to Washington, D.C. flight tickets
KLM
Nov 22
OPO6:00 amPorto
15h 05m
1 stop
IAD4:05 pmWashington, D.C. Dulles Intl
Apr 5
IAD6:30 pmWashington, D.C. Dulles Intl
16h 00m
1 stop
OPO3:30 pmPorto
$572
Find similar
KLM
Nov 21
OPO6:30 amPorto
17h 38m
2 stops
IAD7:08 pmWashington, D.C. Dulles Intl
Apr 5
IAD6:30 pmWashington, D.C. Dulles Intl
16h 00m
1 stop
OPO3:30 pmPorto
$582
Find similar
KLM
Nov 1
OPO6:00 amPorto
15h 05m
1 stop
IAD5:05 pmWashington, D.C. Dulles Intl
Nov 5
IAD6:50 pmWashington, D.C. Dulles Intl
10h 40m
1 stop
OPO10:30 amPorto
$620
Find similar

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 outubro 30, 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

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

sex 11/21

5:35 pm-6:50 pm

1 stop30h 15m

Washington, D.C. Dulles Intl

qui 12/4

8:30 pm-4:55 pm

1 stop15h 25m

$519

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

qui 12/11

9:00 am-3:15 pm

1 stop11h 15m

Washington, D.C. Dulles Intl

sex 12/26

10:30 pm-3:55 pm

1 stop12h 25m

$565

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

sáb 11/22

6:00 am-4:05 pm

1 stop15h 05m

Washington, D.C. Dulles Intl

dom 4/5

6:30 pm-3:30 pm

1 stop16h 00m

$572

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

seg 11/24

6:30 am-4:05 pm

1 stop14h 35m

Washington, D.C. Dulles Intl

seg 12/1

6:50 pm-10:30 am

1 stop10h 40m

$573

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

sex 11/21

6:30 am-10:56 pm

2 stops21h 26m

Washington, D.C. Reagan-National

qui 12/4

11:13 am-10:25 am

2 stops18h 12m

$577

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

sex 11/21

6:30 am-7:08 pm

2 stops17h 38m

Washington, D.C. Dulles Intl

dom 4/5

6:30 pm-3:30 pm

1 stop16h 00m

$582

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

qui 11/20

6:00 am-3:50 pm

1 stop14h 50m

Washington, D.C. Dulles Intl

qui 4/2

5:20 pm-9:45 am

1 stop11h 25m

$584

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

sáb 11/22

6:00 am-3:50 pm

1 stop14h 50m

Washington, D.C. Dulles Intl

dom 4/5

8:45 pm-6:30 pm

1 stop16h 45m

$587

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

dom 11/23

6:00 am-3:50 pm

1 stop14h 50m

Washington, D.C. Dulles Intl

sáb 4/4

8:45 pm-6:30 pm

1 stop16h 45m

$589

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

qui 11/27

6:00 am-11:49 am

2 stops34h 49m

Washington, D.C. Dulles Intl

qui 12/4

12:50 pm-11:40 am

2 stops17h 50m

$594

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 typical price of a round-trip flight between Porto and Washington, D.C.?

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 15% 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.

Direct flights

None
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 15m 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 $480Free CancellationRating
7.1
2,040 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
Woodbridge
Waldorf
Tysons
Laurel
Colonial Beach
Silver Spring
Fredericksburg
Towson
Rockville
Manassas
Reston
Gaithersburg
Fairfax
Glen Burnie
Springfield
Linthicum Heights

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