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Cheap flights from Portugal to Washington, D.C. from $335

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 4/29. 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.

Enter your travel dates to find the best prices.
TAP AIR PORTUGAL Logo
8:00 pm - 3:35 pm
OPO
-
IAD
23h 35m
1 stop
TAP AIR PORTUGAL Logo
6:30 pm - 10:00 am
IAD
-
OPO
11h 30m
1 stop
$502TAP AIR PORTUGAL
Mon, Mar 9 - Mon, Mar 16
TAP AIR PORTUGAL Logo
4:10 pm - 3:35 pm
OPO
-
IAD
27h 25m
1 stop
TAP AIR PORTUGAL Logo
6:30 pm - 10:00 am
IAD
-
OPO
11h 30m
1 stop
$503TAP AIR PORTUGAL
Mon, Mar 9 - Mon, Mar 16
TAP AIR PORTUGAL Logo
4:10 pm - 2:35 pm
OPO
-
IAD
27h 25m
1 stop
TAP AIR PORTUGAL Logo
11:30 pm - 10:00 pm
IAD
-
OPO
18h 30m
1 stop
$518TAP AIR PORTUGAL
Mon, Mar 2 - Sun, Mar 8
TAP AIR PORTUGAL Logo
7:00 am - 3:05 pm
OPO
-
IAD
13h 05m
1 stop
TAP AIR PORTUGAL Logo
10:35 pm - 7:00 pm
IAD
-
OPO
15h 25m
1 stop
$532TAP AIR PORTUGAL
Tue, Apr 21 - Wed, Apr 29
Scandinavian Airlines Logo
11:50 am - 4:50 pm
OPO
-
IAD
34h 00m
1 stop
Scandinavian Airlines Logo
8:20 pm - 5:05 pm
IAD
-
OPO
15h 45m
1 stop
$561Scandinavian Airlines
Thu, May 14 - Thu, May 28
Scandinavian Airlines Logo
11:50 am - 4:50 pm
OPO
-
IAD
34h 00m
1 stop
Scandinavian Airlines Logo
8:20 pm - 5:05 pm
IAD
-
OPO
15h 45m
1 stop
$562Scandinavian Airlines
Thu, May 14 - Thu, May 28
KLM Logo
5:00 am - 4:05 pm
OPO
-
IAD
16h 05m
1 stop
KLM Logo
6:15 pm - 3:25 pm
IAD
-
OPO
16h 10m
1 stop
$567KLM
Mon, Mar 2 - Sat, May 9
KLM Logo
11:15 am - 4:05 pm
OPO
-
IAD
33h 50m
1 stop
KLM Logo
6:15 pm - 3:25 pm
IAD
-
OPO
16h 10m
1 stop
$568KLM
Fri, Mar 6 - Tue, May 26
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
Multiple Airlines Logo
11:25 am - 4:05 pm
LIS
-
IAD
33h 40m
1 stop
Multiple Airlines Logo
6:50 pm - 5:30 pm
IAD
-
LIS
17h 40m
1 stop
$577Multiple Airlines
Fri, Feb 20 - Thu, Feb 26

TAP AIR PORTUGAL flights from Portugal to Washington, D.C. Dulles Intl Airport

Our best TAP AIR PORTUGAL deals on Portugal to Washington, D.C. Dulles Intl Airport flight tickets
TAP AIR PORTUGAL
Mar 9
OPO8:00 pmPorto
23h 35m
1 stop
IAD3:35 pmWashington, D.C. Dulles Intl
Mar 16
IAD6:30 pmWashington, D.C. Dulles Intl
11h 30m
1 stop
OPO10:00 amPorto
$502
TAP AIR PORTUGAL
Mar 9
OPO4:10 pmPorto
27h 25m
1 stop
IAD3:35 pmWashington, D.C. Dulles Intl
Mar 16
IAD6:30 pmWashington, D.C. Dulles Intl
11h 30m
1 stop
OPO10:00 amPorto
$503
TAP AIR PORTUGAL
Mar 2
OPO4:10 pmPorto
27h 25m
1 stop
IAD2:35 pmWashington, D.C. Dulles Intl
Mar 8
IAD11:30 pmWashington, D.C. Dulles Intl
18h 30m
1 stop
OPO10:00 pmPorto
$518

SWISS flights from Portugal to Washington, D.C. Dulles Intl Airport

Our best SWISS deals on Portugal to Washington, D.C. Dulles Intl Airport flight tickets
SWISS
May 1
OPO8:40 amPorto
13h 05m
1 stop
IAD4:45 pmWashington, D.C. Dulles Intl
May 17
IAD8:20 pmWashington, D.C. Dulles Intl
17h 10m
1 stop
OPO6:30 pmPorto
$595
SWISS
Mar 23
OPO12:05 pmPorto
33h 35m
1 stop
IAD5:40 pmWashington, D.C. Dulles Intl
Mar 30
IAD5:35 pmWashington, D.C. Dulles Intl
12h 50m
1 stop
OPO11:25 amPorto
$602
SWISS
Mar 10
OPO7:25 pmPorto
24h 00m
1 stop
IAD3:25 pmWashington, D.C. Dulles Intl
Mar 15
IAD9:30 pmWashington, D.C. Dulles Intl
17h 00m
1 stop
OPO6:30 pmPorto
$604

momondo Fare Finder

 
Customize your flight search to find flights from Portugal to Washington, D.C. Dulles Intl Airport 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 8, 2026.
Use the filters below to find and compare flights from Portugal to Washington, D.C. Dulles Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Mon 3/9

8:00 pm-3:35 pm

1 stop23h 35m

Washington, D.C. Dulles Intl

Mon 3/16

6:30 pm-10:00 am

1 stop11h 30m

$502

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Mon 3/9

4:10 pm-3:35 pm

1 stop27h 25m

Washington, D.C. Dulles Intl

Mon 3/16

6:30 pm-10:00 am

1 stop11h 30m

$503

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Mon 3/2

4:10 pm-2:35 pm

1 stop27h 25m

Washington, D.C. Dulles Intl

Sun 3/8

11:30 pm-10:00 pm

1 stop18h 30m

$518

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-7:00 pm

1 stop15h 25m

$532

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Thu 5/14

11:50 am-4:50 pm

1 stop34h 00m

Washington, D.C. Dulles Intl

Thu 5/28

8:20 pm-5:05 pm

1 stop15h 45m

$561

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Thu 5/14

11:50 am-4:50 pm

1 stop34h 00m

Washington, D.C. Dulles Intl

Thu 5/28

8:20 pm-5:05 pm

1 stop15h 45m

$562

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Mon 3/2

5:00 am-4:05 pm

1 stop16h 05m

Washington, D.C. Dulles Intl

Sat 5/9

6:15 pm-3:25 pm

1 stop16h 10m

$567

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Fri 3/6

11:15 am-4:05 pm

1 stop33h 50m

Washington, D.C. Dulles Intl

Tue 5/26

6:15 pm-3:25 pm

1 stop16h 10m

$568

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

LisbonWashington, D.C.

LIS - IAD

LISIAD

Lisbon Humberto Delgado

Fri 2/20

11:25 am-4:05 pm

1 stop33h 40m

Washington, D.C. Dulles Intl

Thu 2/26

6:50 pm-5:30 pm

1 stop17h 40m

$577

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. Dulles Intl Airport

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. Dulles Intl Airport?

In general, January is the cheapest month to fly from Portugal to Washington, D.C. Dulles Intl Airport. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $544. If you aren’t able to travel to Washington, D.C. Dulles Intl Airport during the month of January, then flying in December is also cheap. Prices for this month can be found on momondo for an average of $588.

What is the cheapest day to depart on your flight to Washington, D.C. Dulles Intl Airport?

Our data shows that Sunday is the least expensive day to fly to Washington, D.C. Dulles Intl Airport. Tickets to fly out on this day can be as low as $658. 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. Dulles Intl Airport for around $895.

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

Flying to Washington, D.C. Dulles Intl Airport from Portugal at noon is the least expensive time of day to depart. momondo users have found prices as low as $484 when looking at flights departing at noon. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are $808 on average. Flights to Washington, D.C. Dulles Intl Airport from Portugal in the morning are generally more expensive because this time of day is more convenient for travelers’ schedules.

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

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

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

There are 3 cabin classes available to choose from on Portugal to Washington, D.C. Dulles Intl 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. Dulles Intl Airport flights?

You could potentially save up to 23% on your flight if you consider stops on a Portugal to Washington, D.C. Dulles Intl Airport flight.

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

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

Best Price Found

$550

Fastest flight time

7h 55m

Direct flights

Every day
The best one-way flight to Washington, D.C. Dulles Intl Airport from Portugal in the past 72 hours is $550. The best round-trip flight deal from Portugal to Washington, D.C. Dulles Intl Airport found on momondo in the last 72 hours is $743.
The fastest flight from Portugal to Washington, D.C. Dulles Intl Airport takes 7h 55m
Direct flights go from Portugal to Washington, D.C. Dulles Intl Airport every day.
Search flight deals

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

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

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

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

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Portugal to Washington, D.C. Dulles Intl Airport.

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

    The necessary travel and health documents for your Washington, D.C. Dulles Intl Airport 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 plane model from Portugal to Washington, D.C. Dulles Intl Airport?

Best airlines flying from Portugal to Washington, D.C. Dulles Intl Airport

Compare and see reviews for airlines that fly from Portugal to Washington, D.C. Dulles Intl Airport with momondo
Airline
Rating
Free Cancellation
Price
TAP AIR PORTUGALPriceFrom $492Free CancellationRating
7.1
2,135 reviews
Search TAP AIR PORTUGAL flights
United AirlinesPriceFrom $497Free CancellationRating
7.4
9,254 reviews
Search United Airlines 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
Winchester
Waldorf
Woodbridge
Tysons
Laurel
Colonial Beach
Silver Spring
Towson
Fredericksburg
Gaithersburg
Rockville
Manassas
Springfield
Sterling
Fairfax
Linthicum Heights

Why use momondo?

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

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Portugal to Washington, D.C.. momondo saves you time and could save you money on your trip.

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

Yes. All flights to Washington, D.C. from Portugal on momondo can be compared and filtered by various policies on offer, including flexible booking.

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

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Washington, D.C. from Portugal.

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 offers price alerts on flights to Washington, D.C. from Portugal. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

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