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Cheap flights from Porto to Washington, D.C. from $357

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 12/3. 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.
TAP AIR PORTUGAL Logo
8:30 am - 2:45 pmOPO  Porto-IAD Washington, D.C. Dulles Intl
11h 15m1 stop Lisbon Humberto Delgado
TAP AIR PORTUGAL Logo
5:25 pm - 10:00 amIAD  Washington, D.C. Dulles Intl-OPO Porto
11h 35m1 stop Lisbon Humberto Delgado
$589TAP AIR PORTUGAL
ti., des. 1 - ma., des. 7
TAP AIR PORTUGAL Logo
7:00 am - 2:25 pmOPO  Porto-IAD Washington, D.C. Dulles Intl
12h 25m1 stop Lisbon Humberto Delgado
TAP AIR PORTUGAL Logo
5:40 pm - 8:35 pmIAD  Washington, D.C. Dulles Intl-OPO Porto
21h 55m1 stop Lisbon Humberto Delgado
$590TAP AIR PORTUGAL
fr., okt. 9 - sø., okt. 11
TAP AIR PORTUGAL Logo
7:00 am - 2:25 pmOPO  Porto-IAD Washington, D.C. Dulles Intl
12h 25m1 stop Lisbon Humberto Delgado
TAP AIR PORTUGAL Logo
5:40 pm - 9:00 amIAD  Washington, D.C. Dulles Intl-OPO Porto
10h 20m1 stop Lisbon Humberto Delgado
$593TAP AIR PORTUGAL
fr., okt. 9 - sø., okt. 11
TAP AIR PORTUGAL Logo
7:00 am - 3:10 pmOPO  Porto-IAD Washington, D.C. Dulles Intl
13h 10m1 stop Lisbon Humberto Delgado
TAP AIR PORTUGAL Logo
10:35 pm - 8:25 pmIAD  Washington, D.C. Dulles Intl-OPO Porto
16h 50m1 stop Lisbon Humberto Delgado
$594TAP AIR PORTUGAL
to., sep. 17 - on., sep. 30
KLM Logo
5:00 am - 3:35 pmOPO  Porto-IAD Washington, D.C. Dulles Intl
15h 35m1 stop Amsterdam Schiphol
KLM Logo
9:45 pm - 3:25 pmIAD  Washington, D.C. Dulles Intl-OPO Porto
12h 40m1 stop Paris Charles de Gaulle
$604KLM
on., sep. 9 - on., sep. 16
Delta Logo
5:00 am - 3:35 pmOPO  Porto-IAD Washington, D.C. Dulles Intl
15h 35m1 stop Amsterdam Schiphol
Delta Logo
9:45 pm - 3:25 pmIAD  Washington, D.C. Dulles Intl-OPO Porto
12h 40m1 stop Paris Charles de Gaulle
$604Delta
ti., sep. 8 - on., sep. 16
Delta Logo
5:00 am - 3:35 pmOPO  Porto-IAD Washington, D.C. Dulles Intl
15h 35m1 stop Amsterdam Schiphol
Delta Logo
6:26 pm - 3:25 pmIAD  Washington, D.C. Dulles Intl-OPO Porto
15h 59m2 stops New York John F Kennedy Intl Paris Charles de Gaulle
$604Delta
to., sep. 17 - on., sep. 30
Multiple Airlines Logo
5:00 am - 3:35 pmOPO  Porto-IAD Washington, D.C. Dulles Intl
15h 35m1 stop Amsterdam Schiphol
Multiple Airlines Logo
9:45 pm - 3:25 pmIAD  Washington, D.C. Dulles Intl-OPO Porto
12h 40m1 stop Paris Charles de Gaulle
$604Multiple Airlines
ti., sep. 8 - ti., sep. 15
Multiple Airlines Logo
5:00 am - 3:35 pmOPO  Porto-IAD Washington, D.C. Dulles Intl
15h 35m1 stop Amsterdam Schiphol
Multiple Airlines Logo
9:45 pm - 3:25 pmIAD  Washington, D.C. Dulles Intl-OPO Porto
12h 40m1 stop Paris Charles de Gaulle
$604Multiple Airlines
to., aug. 27 - to., sep. 10
Delta Logo
5:00 am - 3:35 pmOPO  Porto-IAD Washington, D.C. Dulles Intl
15h 35m1 stop Amsterdam Schiphol
Delta Logo
6:26 pm - 3:25 pmIAD  Washington, D.C. Dulles Intl-OPO Porto
15h 59m2 stops New York John F Kennedy Intl Paris Charles de Gaulle
$604Delta
ti., sep. 8 - ti., sep. 15

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Delta flights from Porto to Washington, D.C.

Our best Delta deals on Porto to Washington, D.C. flight tickets
Delta
Sep 17
OPO5:00 amPorto
15h 35m
1 stop
IAD3:35 pmWashington, D.C. Dulles Intl
Sep 30
IAD6:26 pmWashington, D.C. Dulles Intl
15h 59m
2 stops
OPO3:25 pmPorto
$605
Delta
Oct 1
OPO5:55 amPorto
18h 40m
1 stop
IAD7:35 pmWashington, D.C. Dulles Intl
Oct 14
IAD9:45 pmWashington, D.C. Dulles Intl
12h 40m
1 stop
OPO3:25 pmPorto
$608
Delta
Aug 27
OPO5:00 amPorto
18h 33m
2 stops
IAD6:33 pmWashington, D.C. Dulles Intl
Sep 10
IAD9:45 pmWashington, D.C. Dulles Intl
12h 40m
1 stop
OPO3:25 pmPorto
$609

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
Oct 1
OPO9:00 amPorto
11h 10m
1 stop
IAD3:10 pmWashington, D.C. Dulles Intl
Oct 14
IAD5:45 pmWashington, D.C. Dulles Intl
11h 25m
1 stop
OPO10:10 amPorto
$581
TAP AIR PORTUGAL
Dec 1
OPO8:30 amPorto
11h 15m
1 stop
IAD2:45 pmWashington, D.C. Dulles Intl
Dec 7
IAD5:25 pmWashington, D.C. Dulles Intl
11h 35m
1 stop
OPO10:00 amPorto
$589
TAP AIR PORTUGAL
Oct 9
OPO7:00 amPorto
12h 25m
1 stop
IAD2:25 pmWashington, D.C. Dulles Intl
Oct 11
IAD5:40 pmWashington, D.C. Dulles Intl
21h 55m
1 stop
OPO8:35 pmPorto
$590

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 12, 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 Porto - IAD Washington, D.C. Dulles Intl

OPOIAD

Porto

ti. 12/1

8:30 am-2:45 pm

1 stop11h 15m

Washington, D.C. Dulles Intl

ma. 12/7

5:25 pm-10:00 am

1 stop11h 35m

$589

PortoWashington, D.C.

OPO Porto - IAD Washington, D.C. Dulles Intl

OPOIAD

Porto

fr. 10/9

7:00 am-2:25 pm

1 stop12h 25m

Washington, D.C. Dulles Intl

sø. 10/11

5:40 pm-8:35 pm

1 stop21h 55m

$590
Quickest round-trip

PortoWashington, D.C.

OPO Porto - IAD Washington, D.C. Dulles Intl

OPOIAD

Porto

fr. 10/9

7:00 am-2:25 pm

1 stop12h 25m

Washington, D.C. Dulles Intl

sø. 10/11

5:40 pm-9:00 am

1 stop10h 20m

$593

PortoWashington, D.C.

OPO Porto - IAD Washington, D.C. Dulles Intl

OPOIAD

Porto

to. 9/17

7:00 am-3:10 pm

1 stop13h 10m

Washington, D.C. Dulles Intl

on. 9/30

10:35 pm-8:25 pm

1 stop16h 50m

$594

PortoWashington, D.C.

OPO Porto - IAD Washington, D.C. Dulles Intl

OPOIAD

Porto

on. 9/9

5:00 am-3:35 pm

1 stop15h 35m

Washington, D.C. Dulles Intl

on. 9/16

9:45 pm-3:25 pm

1 stop12h 40m

$604

PortoWashington, D.C.

OPO Porto - IAD Washington, D.C. Dulles Intl

OPOIAD

Porto

ti. 9/8

5:00 am-3:35 pm

1 stop15h 35m

Washington, D.C. Dulles Intl

on. 9/16

9:45 pm-3:25 pm

1 stop12h 40m

$604

PortoWashington, D.C.

OPO Porto - IAD Washington, D.C. Dulles Intl

OPOIAD

Porto

to. 9/17

5:00 am-3:35 pm

1 stop15h 35m

Washington, D.C. Dulles Intl

on. 9/30

6:26 pm-3:25 pm

2 stops15h 59m

$604

PortoWashington, D.C.

OPO Porto - IAD Washington, D.C. Dulles Intl

OPOIAD

Porto

ti. 9/8

5:00 am-3:35 pm

1 stop15h 35m

Washington, D.C. Dulles Intl

ti. 9/15

9:45 pm-3:25 pm

1 stop12h 40m

$604

PortoWashington, D.C.

OPO Porto - IAD Washington, D.C. Dulles Intl

OPOIAD

Porto

to. 8/27

5:00 am-3:35 pm

1 stop15h 35m

Washington, D.C. Dulles Intl

to. 9/10

9:45 pm-3:25 pm

1 stop12h 40m

$604

PortoWashington, D.C.

OPO Porto - IAD Washington, D.C. Dulles Intl

OPOIAD

Porto

ti. 9/8

5:00 am-3:35 pm

1 stop15h 35m

Washington, D.C. Dulles Intl

ti. 9/15

6:26 pm-3:25 pm

2 stops15h 59m

$604

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.?

Prices are currently low for flights on this route.

Typical prices usually range from $761 to $809.
The lowest price recently found on this route was $589.

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 $554. If you’re not able to fly to Washington, D.C. in March, then May is your next best option. Flight prices from Porto to Washington, D.C. during May average around $567.

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 25m

Direct flights

None
The fastest flight from Porto to Washington, D.C. takes 12h 25m
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 25m 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
Linthicum Heights
Rockville
Silver Spring
Towson
Colonial Beach
Springfield
Fairfax
Tysons
Edgewood
Glen Burnie
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