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Cheap flights from Portugal to Washington, D.C. from $325

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Portugal to Washington, D.C. departing on 10/7. 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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Find the cheapest flights from Portugal to Washington, D.C.

Recent round-trip flight deals from Portugal to Washington, D.C.

PLAY Logo
9:20 pm - 5:40 pmLIS-BWI
25h 20m1 stop
PLAY Logo
6:50 pm - 8:20 pmBWI-LIS
20h 30m1 stop
$399PLAY
Find Deal
Fri, Sep 19 - Sun, Sep 28
PLAY Logo
9:20 pm - 5:40 pmLIS-BWI
25h 20m1 stop
PLAY Logo
6:50 pm - 8:20 pmBWI-LIS
20h 30m1 stop
$426PLAY
Find Deal
Fri, Sep 26 - Sun, Oct 5
TAP AIR PORTUGAL Logo
10:25 pm - 3:20 pmOPO-IAD
21h 55m1 stop
TAP AIR PORTUGAL Logo
10:20 pm - 7:00 pmIAD-OPO
15h 40m1 stop
$498TAP AIR PORTUGAL
Find Deal
Wed, Oct 8 - Tue, Oct 21
TAP AIR PORTUGAL Logo
9:00 am - 3:20 pmOPO-IAD
11h 20m1 stop
TAP AIR PORTUGAL Logo
10:20 pm - 5:00 pmIAD-OPO
13h 40m1 stop
$500TAP AIR PORTUGAL
Find Deal
Tue, Sep 16 - Tue, Sep 23
United Airlines Logo
5:05 am - 1:30 pmLIS-IAD
13h 25m1 stop
United Airlines Logo
9:35 am - 9:20 amIAD-LIS
18h 45m1 stop
$539United Airlines
Find Deal
Thu, Oct 9 - Thu, Oct 23
United Airlines Logo
5:05 am - 3:50 pmLIS-IAD
15h 45m1 stop
United Airlines Logo
10:20 pm - 9:50 pmIAD-LIS
18h 30m1 stop
$544United Airlines
Find Deal
Thu, Oct 2 - Thu, Oct 9
Lufthansa Logo
5:05 am - 3:50 pmLIS-IAD
15h 45m1 stop
Lufthansa Logo
10:15 pm - 10:30 amIAD-LIS
7h 15mnonstop
$550Lufthansa
Find Deal
Thu, Oct 9 - Thu, Oct 23
British Airways Logo
8:20 am - 5:30 pmOPO-IAD
13h 10m1 stop
British Airways Logo
6:20 pm - 8:00 pmIAD-OPO
20h 40m2 stops
$555British Airways
Find Deal
Sun, Oct 26 - Sun, Nov 2
Lufthansa Logo
12:20 pm - 3:45 pmLIS-IAD
8h 25mnonstop
Lufthansa Logo
10:20 pm - 10:35 amIAD-LIS
7h 15mnonstop
$558Lufthansa
Find Deal
Thu, Sep 25 - Sat, Oct 11
British Airways Logo
7:05 am - 7:45 pmLIS-BWI
16h 40m1 stop
British Airways Logo
8:35 pm - 2:50 pmBWI-LIS
13h 15m1 stop
$564British Airways
Find Deal
Wed, Oct 29 - Fri, Nov 7

Scandinavian Airlines flights from Portugal to Washington, D.C.

Our best Scandinavian Airlines deals on Portugal to Washington, D.C. flight tickets
Scandinavian Airlines
Nov 5
LIS4:55 pmLisbon Humberto Delgado
29h 20m
1 stop
IAD5:15 pmWashington, D.C. Dulles Intl
Nov 10
IAD7:59 pmWashington, D.C. Dulles Intl
39h 06m
2 stops
LIS4:05 pmLisbon Humberto Delgado
$492
Find similar
Scandinavian Airlines
Oct 10
OPO5:55 pmPorto
31h 04m
1 stop
IAD7:59 pmWashington, D.C. Dulles Intl
Oct 23
IAD10:05 pmWashington, D.C. Dulles Intl
14h 00m
1 stop
OPO5:05 pmPorto
$496
Find similar

SWISS flights from Portugal to Washington, D.C.

Our best SWISS deals on Portugal to Washington, D.C. flight tickets
SWISS
Sep 5
OPO8:40 amPorto
12h 35m
1 stop
IAD4:15 pmWashington, D.C. Dulles Intl
Sep 21
IAD8:45 pmWashington, D.C. Dulles Intl
30h 10m
1 stop
OPO7:55 amPorto
$549
Find similar
SWISS
Sep 11
LIS5:55 amLisbon Humberto Delgado
15h 20m
1 stop
IAD4:15 pmWashington, D.C. Dulles Intl
Sep 27
IAD8:45 pmWashington, D.C. Dulles Intl
21h 35m
1 stop
LIS11:20 pmLisbon Humberto Delgado
$551
Find similar
SWISS
Oct 14
LIS5:55 amLisbon Humberto Delgado
15h 20m
1 stop
IAD4:15 pmWashington, D.C. Dulles Intl
Oct 19
IAD8:45 pmWashington, D.C. Dulles Intl
21h 35m
1 stop
LIS11:20 pmLisbon Humberto Delgado
$552
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Portugal 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 20, 2025.
Use the filters below to find and compare flights from Portugal to Washington, D.C. that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

LisbonBaltimore

LIS - BWI

LISBWI

Lisbon Humberto Delgado

Fri 9/19

9:20 pm-5:40 pm

1 stop25h 20m

Baltimore/Washington

Sun 9/28

6:50 pm-8:20 pm

1 stop20h 30m

$399

LisbonBaltimore

LIS - BWI

LISBWI

Lisbon Humberto Delgado

Fri 9/26

9:20 pm-5:40 pm

1 stop25h 20m

Baltimore/Washington

Sun 10/5

6:50 pm-8:20 pm

1 stop20h 30m

$426

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Wed 10/8

10:25 pm-3:20 pm

1 stop21h 55m

Washington, D.C. Dulles Intl

Tue 10/21

10:20 pm-7:00 pm

1 stop15h 40m

$498

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Tue 9/16

9:00 am-3:20 pm

1 stop11h 20m

Washington, D.C. Dulles Intl

Tue 9/23

10:20 pm-5:00 pm

1 stop13h 40m

$500

LisbonWashington, D.C.

LIS - IAD

LISIAD

Lisbon Humberto Delgado

Thu 10/9

5:05 am-1:30 pm

1 stop13h 25m

Washington, D.C. Dulles Intl

Thu 10/23

9:35 am-9:20 am

1 stop18h 45m

$539

LisbonWashington, D.C.

LIS - IAD

LISIAD

Lisbon Humberto Delgado

Thu 10/2

5:05 am-3:50 pm

1 stop15h 45m

Washington, D.C. Dulles Intl

Thu 10/9

10:20 pm-9:50 pm

1 stop18h 30m

$544

LisbonWashington, D.C.

LIS - IAD

LISIAD

Lisbon Humberto Delgado

Thu 10/9

5:05 am-3:50 pm

1 stop15h 45m

Washington, D.C. Dulles Intl

Thu 10/23

10:15 pm-10:30 am

Nonstop7h 15m

$550

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Sun 10/26

8:20 am-5:30 pm

1 stop13h 10m

Washington, D.C. Dulles Intl

Sun 11/2

6:20 pm-8:00 pm

2 stops20h 40m

$555

LisbonWashington, D.C.

LIS - IAD

LISIAD

Lisbon Humberto Delgado

Thu 9/25

12:20 pm-3:45 pm

Nonstop8h 25m

Washington, D.C. Dulles Intl

Sat 10/11

10:20 pm-10:35 am

Nonstop7h 15m

$558

LisbonBaltimore

LIS - BWI

LISBWI

Lisbon Humberto Delgado

Wed 10/29

7:05 am-7:45 pm

1 stop16h 40m

Baltimore/Washington

Fri 11/7

8:35 pm-2:50 pm

1 stop13h 15m

$564

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 Portugal 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 September is, on average, the cheapest month to fly to Washington, D.C. from Portugal, with most prices found around $521. If you’re not able to fly to Washington, D.C. in September, then March is your next best option. Flight prices from Portugal to Washington, D.C. during March average around $560.

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 Portugal is on a Sunday. momondo users have found tickets for Sunday departures for as low as $715. However, this price may fluctuate depending on the airline, the season, and holidays. When flying out on a Monday, the most expensive travel day of the week, you can expect to see flight prices from Portugal to Washington, D.C. for around $881.

What is the cheapest time of day to depart on your flight to Washington, D.C.?

At noon is the cheapest time of day to fly from Portugal to Washington, D.C. when you can find flight prices for as low as $484. Flying to Washington, D.C. at noon is an ideal time because this is during off-peak travel hours. Try not to purchase tickets in the morning because they tend to be around $776. Of course, these prices can vary depending on the time of year and what airport you fly to.

What is the cheapest Portugal to Washington, D.C. flight route?

Fly from Lisbon Humberto Delgado to Washington, D.C. Dulles Intl for the best Portugal - Washington, D.C. flight prices

How far in advance should I book a flight to Washington, D.C.?

You are more likely to see cheaper flights to Washington, D.C. from Portugal when booking weeks ahead of your departure date. In general, you can expect to find flights to Washington, D.C. for around $712 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Washington, D.C. from Portugal for as low as $573 on momondo.

What cabin class options are available on Portugal to Washington, D.C. flights?

There are 3 cabin classes available to choose from on Portugal to Washington, D.C. flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

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

You could potentially save up to 10% on your flight if you consider stops on a Portugal to Washington, D.C. flight.

Cheap Portugal to Washington, D.C. flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Portugal to Washington, D.C.

Best Price Found

$689

Fastest flight time

8h 15m

Direct flights

Every day

Airports in Washington, D.C.

1 airport
The best one-way flight to Washington, D.C. from Portugal in the past 72 hours is $689. The best round-trip flight deal from Portugal to Washington, D.C. found on momondo in the last 72 hours is $727.
The fastest flight from Portugal to Washington, D.C. takes 8h 15m
Direct flights go from Portugal to Washington, D.C. every day.
There is 1 airport near Washington, D.C.: Washington, D.C. Dulles Intl (IAD)
Search flight deals

  • When did momondo last update prices for flights from Portugal to Washington, D.C.?

    Prices for flights from Portugal to Washington, D.C. are refreshed on a daily basis.

  • How many operators does momondo search for flights from Portugal to Washington, D.C.?

  • How old do you have to be to fly from Portugal 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 Portugal to Washington, D.C..

  • What documentation or ID do you need to fly to Washington, D.C.?

    The travel and health documents you'll need for your trip to Washington, D.C. may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Washington, D.C.. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular plane model from Portugal to Washington, D.C.?

Best airlines flying from Portugal to Washington, D.C.

Compare and see reviews for airlines that fly from Portugal to Washington, D.C. with momondo
Airline
Rating
Free Cancellation
Price
TAP AIR PORTUGALPriceFrom $492Free CancellationRating
7.1
1,956 reviews
Search TAP AIR PORTUGAL flights
British AirwaysPriceFrom $493Free CancellationRating
6.7
7,289 reviews
Search British Airways flights
United AirlinesPriceFrom $534Free CancellationRating
7.4
8,928 reviews
Search United Airlines flights
LufthansaPriceFrom $536Free CancellationRating
6.8
7,337 reviews
Search Lufthansa 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
Gettysburg
Arlington
National Harbor
Woodbridge
Waldorf
Tysons
Silver Spring
Laurel
Colonial Beach
Fredericksburg
Manassas
Towson
Rockville
Gaithersburg
Reston
Fairfax
Glen Burnie
Springfield
Linthicum Heights

Why use momondo?

Why should I use momondo to find a flight deal from Portugal to Washington, D.C.?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Portugal to Washington, D.C. for you.

Can I find flights from Portugal to Washington, D.C. with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Portugal to Washington, D.C. flights to just show those with flexible booking policies.

How can momondo help me find flights from Portugal to Washington, D.C.?

Once all potential Portugal 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 Portugal to Washington, D.C. right now. Can momondo alert me if prices change?

Yes. momondo can track prices for Portugal to Washington, D.C. flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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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