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Cheap flights from Washington, D.C. Dulles Intl Airport to Portugal from $241

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Washington, D.C. Dulles Intl Airport to Portugal departing on 11/11. 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 Washington, D.C. Dulles Intl Airport to Portugal

Cheap round-trip flights

Scandinavian Airlines Logo
10:05 pm - 8:50 amIAD-FAO
29h 45m1 stop
Scandinavian Airlines Logo
10:50 am - 5:15 pmFAO-IAD
35h 25m1 stop
$489Scandinavian Airlines
Find Deal
Mon, Oct 20 - Tue, Nov 4
Scandinavian Airlines Logo
10:05 pm - 8:50 amIAD-FAO
29h 45m1 stop
Scandinavian Airlines Logo
10:50 am - 5:15 pmFAO-IAD
35h 25m1 stop
$493Scandinavian Airlines
Find Deal
Mon, Oct 20 - Tue, Nov 4
TAP AIR PORTUGAL Logo
10:20 pm - 5:20 pmIAD-FAO
14h 00m1 stop
TAP AIR PORTUGAL Logo
6:15 pm - 3:20 pmFAO-IAD
26h 05m1 stop
$544TAP AIR PORTUGAL
Find Deal
Tue, Sep 16 - Tue, Sep 30
TAP AIR PORTUGAL Logo
10:20 pm - 5:20 pmIAD-FAO
14h 00m1 stop
TAP AIR PORTUGAL Logo
6:15 pm - 3:20 pmFAO-IAD
26h 05m1 stop
$546TAP AIR PORTUGAL
Find Deal
Tue, Sep 16 - Tue, Sep 30
United Airlines Logo
1:00 pm - 9:35 amIAD-OPO
15h 35m1 stop
United Airlines Logo
12:30 pm - 5:30 pmOPO-IAD
34h 00m2 stops
$556United Airlines
Find Deal
Mon, Sep 29 - Fri, Dec 5
United Airlines Logo
8:21 am - 11:15 amIAD-OPO
21h 54m2 stops
United Airlines Logo
6:00 am - 3:50 pmOPO-IAD
14h 50m1 stop
$557United Airlines
Find Deal
Tue, Oct 14 - Tue, Oct 21
Lufthansa Logo
10:20 pm - 11:20 pmIAD-OPO
20h 00m1 stop
Lufthansa Logo
6:00 am - 3:50 pmOPO-IAD
14h 50m1 stop
$573Lufthansa
Find Deal
Fri, Oct 24 - Thu, Nov 6
Lufthansa Logo
10:20 pm - 11:20 pmIAD-OPO
20h 00m1 stop
Lufthansa Logo
6:15 am - 3:50 pmOPO-IAD
14h 35m2 stops
$575Lufthansa
Find Deal
Mon, Oct 13 - Fri, Oct 24
Royal Air Maroc Logo
9:05 pm - 5:40 pmIAD-LIS
15h 35m1 stop
Royal Air Maroc Logo
10:05 pm - 7:05 pmLIS-IAD
26h 00m1 stop
$634Royal Air Maroc
Find Deal
Sun, Oct 19 - Thu, Oct 23
Royal Air Maroc Logo
9:05 pm - 5:40 pmIAD-LIS
15h 35m1 stop
Royal Air Maroc Logo
5:55 pm - 6:45 pmLIS-IAD
29h 50m1 stop
$647Royal Air Maroc
Find Deal
Fri, Sep 26 - Sun, Dec 7

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

Our best Scandinavian Airlines deals on Washington, D.C. Dulles Intl Airport to Portugal flight tickets
Scandinavian Airlines
Oct 20
IAD10:05 pmWashington, D.C. Dulles Intl
29h 45m
1 stop
FAO8:50 amFaro
Nov 4
FAO10:50 amFaro
35h 25m
1 stop
IAD5:15 pmWashington, D.C. Dulles Intl
$489
Find similar
Scandinavian Airlines
Oct 20
IAD10:05 pmWashington, D.C. Dulles Intl
29h 45m
1 stop
FAO8:50 amFaro
Nov 4
FAO10:50 amFaro
35h 25m
1 stop
IAD5:15 pmWashington, D.C. Dulles Intl
$493
Find similar
Scandinavian Airlines
Sep 29
IAD10:05 pmWashington, D.C. Dulles Intl
29h 45m
1 stop
FAO8:50 amFaro
Oct 15
FAO9:40 amFaro
15h 19m
1 stop
IAD7:59 pmWashington, D.C. Dulles Intl
$521
Find similar

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

Our best TAP AIR PORTUGAL deals on Washington, D.C. Dulles Intl Airport to Portugal flight tickets
TAP AIR PORTUGAL
Sep 16
IAD10:20 pmWashington, D.C. Dulles Intl
14h 00m
1 stop
FAO5:20 pmFaro
Sep 30
FAO6:15 pmFaro
26h 05m
1 stop
IAD3:20 pmWashington, D.C. Dulles Intl
$544
Find similar
TAP AIR PORTUGAL
Sep 16
IAD10:20 pmWashington, D.C. Dulles Intl
14h 00m
1 stop
FAO5:20 pmFaro
Sep 30
FAO6:15 pmFaro
26h 05m
1 stop
IAD3:20 pmWashington, D.C. Dulles Intl
$546
Find similar
TAP AIR PORTUGAL
Sep 24
IAD10:20 pmWashington, D.C. Dulles Intl
15h 40m
1 stop
OPO7:00 pmPorto
Nov 5
OPO12:00 pmPorto
14h 00m
1 stop
IAD9:00 pmWashington, D.C. Dulles Intl
$561
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Washington, D.C. Dulles Intl Airport to Portugal 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 26, 2025.
Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to Portugal that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Washington, D.C.Faro

IAD - FAO

IADFAO

Washington, D.C. Dulles Intl

Mon 10/20

10:05 pm-8:50 am

1 stop29h 45m

Faro

Tue 11/4

10:50 am-5:15 pm

1 stop35h 25m

$489

Washington, D.C.Faro

IAD - FAO

IADFAO

Washington, D.C. Dulles Intl

Mon 10/20

10:05 pm-8:50 am

1 stop29h 45m

Faro

Tue 11/4

10:50 am-5:15 pm

1 stop35h 25m

$493

Washington, D.C.Faro

IAD - FAO

IADFAO

Washington, D.C. Dulles Intl

Tue 9/16

10:20 pm-5:20 pm

1 stop14h 00m

Faro

Tue 9/30

6:15 pm-3:20 pm

1 stop26h 05m

$544

Washington, D.C.Faro

IAD - FAO

IADFAO

Washington, D.C. Dulles Intl

Tue 9/16

10:20 pm-5:20 pm

1 stop14h 00m

Faro

Tue 9/30

6:15 pm-3:20 pm

1 stop26h 05m

$546

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Mon 9/29

1:00 pm-9:35 am

1 stop15h 35m

Porto

Fri 12/5

12:30 pm-5:30 pm

2 stops34h 00m

$556

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Tue 10/14

8:21 am-11:15 am

2 stops21h 54m

Porto

Tue 10/21

6:00 am-3:50 pm

1 stop14h 50m

$557

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Fri 10/24

10:20 pm-11:20 pm

1 stop20h 00m

Porto

Thu 11/6

6:00 am-3:50 pm

1 stop14h 50m

$573

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Mon 10/13

10:20 pm-11:20 pm

1 stop20h 00m

Porto

Fri 10/24

6:15 am-3:50 pm

2 stops14h 35m

$575

Washington, D.C.Lisbon

IAD - LIS

IADLIS

Washington, D.C. Dulles Intl

Sun 10/19

9:05 pm-5:40 pm

1 stop15h 35m

Lisbon Humberto Delgado

Thu 10/23

10:05 pm-7:05 pm

1 stop26h 00m

$634

Washington, D.C.Lisbon

IAD - LIS

IADLIS

Washington, D.C. Dulles Intl

Fri 9/26

9:05 pm-5:40 pm

1 stop15h 35m

Lisbon Humberto Delgado

Sun 12/7

5:55 pm-6:45 pm

1 stop29h 50m

$647

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 Portugal from

How to get the cheapest flight ticket from Washington, D.C. Dulles Intl Airport to Portugal

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 Portugal?

The cheapest month to fly to Portugal from Washington, D.C. Dulles Intl Airport is in February. Flight prices, which tend to average around $658, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of February, then book flights to Portugal from Washington, D.C. Dulles Intl Airport during January instead. Flights to Portugal in January, while not as cheap as those in February, still average around $710.

What is the cheapest day to depart on your flight to Portugal?

According to our data, Monday is the cheapest day to fly to Portugal from Washington, D.C. Dulles Intl Airport. The lowest ticket price found for a Monday departure recently was $739. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. The most expensive day to fly to Portugal is Friday, with ticket prices averaging around $909.

What is the cheapest time of day to depart on your flight to Portugal?

Our most recent data shows that the best time of day to fly to Portugal is at noon. Flights from Washington, D.C. Dulles Intl Airport to Portugal during this time can be as low as $661. In the evening is when there is more demand to fly to Portugal, so prices are often more expensive at around $847 per ticket.

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

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

How far in advance should I book a flight to Portugal?

You are more likely to see cheaper flights to Portugal from Washington, D.C. Dulles Intl Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Portugal for around $902 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Portugal from Washington, D.C. Dulles Intl Airport for as low as $748 on momondo.

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

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

You could potentially save up to 22% on your flight if you consider stops on a Washington, D.C. Dulles Intl Airport to Portugal flight.

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

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

Best Price Found

$294

Fastest flight time

7h 05m

Direct flights

Every day

Airports in Portugal

1 airport
The best one-way flight to Portugal from Washington, D.C. Dulles Intl Airport in the past 72 hours is $294. The best round-trip flight deal from Washington, D.C. Dulles Intl Airport to Portugal found on momondo in the last 72 hours is $523.
The fastest flight from Washington, D.C. Dulles Intl Airport to Portugal takes 7h 05m
Direct flights go from Washington, D.C. Dulles Intl Airport to Portugal every day.
There is 1 airport near Portugal: Lisbon Humberto Delgado (LIS)
Search flight deals

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

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

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

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

    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 Washington, D.C. Dulles Intl Airport to Portugal.

  • What documentation or ID do you need to fly to Portugal?

    The travel and health documents required for your trip to Portugal can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Portugal. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

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

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

Compare and see reviews for airlines that fly from Washington, D.C. Dulles Intl Airport to Portugal with momondo
Airline
Rating
Free Cancellation
Price
PLAYPriceFrom $338Free CancellationRating
7.0
103 reviews
Search PLAY flights
DeltaPriceFrom $418Free CancellationRating
7.9
7,979 reviews
Search Delta flights
KLMPriceFrom $424Free CancellationRating
7.8
1,387 reviews
Search KLM flights
TAP AIR PORTUGALPriceFrom $473Free CancellationRating
7.1
1,962 reviews
Search TAP AIR PORTUGAL flights
British AirwaysPriceFrom $480Free CancellationRating
6.7
7,309 reviews
Search British Airways flights
American AirlinesPriceFrom $508Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
IberiaPriceFrom $515Free CancellationRating
7.0
2,891 reviews
Search Iberia flights
United AirlinesPriceFrom $543Free CancellationRating
7.4
8,943 reviews
Search United Airlines flights
Royal Air MarocPriceFrom $552Free CancellationRating
6.1
505 reviews
Search Royal Air Maroc flights
Turkish AirlinesPriceFrom $586Free CancellationRating
7.3
3,955 reviews
Search Turkish Airlines flights

Why use momondo?

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

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Portugal from Washington, D.C..

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

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

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

Once you have performed a search for Washington, D.C. to Portugal flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from Washington, D.C. to Portugal right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of Washington, D.C. to Portugal flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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