Cheap flights from Washington, D.C. Dulles Intl Airport to Portugal from $276

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 2/1. 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
0 bags

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.

Find the cheapest flights from Washington, D.C. Dulles Intl Airport to Portugal

Cheap round-trip flights

Enter your travel dates to find the best prices.
Lufthansa Logo
5:40 pm - 12:50 pm
IAD
-
OPO
14h 10m1 stop
Lufthansa Logo
6:00 am - 2:35 pm
OPO
-
IAD
13h 35m1 stop
$436Lufthansa
Tue, Jan 20 - Tue, Jan 27
SWISS Logo
10:15 pm - 11:15 am
IAD
-
OPO
32h 00m2 stops
SWISS Logo
12:05 pm - 4:40 pm
OPO
-
IAD
33h 35m1 stop
$442SWISS
Mon, Jan 12 - Mon, Jan 19
Multiple Airlines Logo
5:45 pm - 12:05 pm
IAD
-
OPO
13h 20m1 stop
Multiple Airlines Logo
6:00 am - 3:50 pm
OPO
-
IAD
14h 50m1 stop
$457Multiple Airlines
Tue, Jan 20 - Tue, Jan 27
Multiple Airlines Logo
5:45 pm - 12:05 pm
IAD
-
OPO
13h 20m1 stop
Multiple Airlines Logo
12:05 pm - 4:40 pm
OPO
-
IAD
33h 35m1 stop
$458Multiple Airlines
Mon, Jan 12 - Mon, Jan 19
TAP AIR PORTUGAL Logo
10:30 pm - 3:45 pm
IAD
-
FAO
12h 15m1 stop
TAP AIR PORTUGAL Logo
4:35 pm - 3:15 pm
FAO
-
IAD
27h 40m1 stop
$545TAP AIR PORTUGAL
Sun, Jan 18 - Sun, Jan 25
TAP AIR PORTUGAL Logo
10:35 pm - 11:50 pm
IAD
-
FAO
20h 15m1 stop
TAP AIR PORTUGAL Logo
6:05 am - 8:05 pm
FAO
-
IAD
19h 00m1 stop
$552TAP AIR PORTUGAL
Sat, Apr 18 - Sat, Apr 25
Scandinavian Airlines Logo
12:23 pm - 8:55 am
IAD
-
LIS
39h 32m2 stops
Scandinavian Airlines Logo
4:55 pm - 7:09 pm
LIS
-
IAD
31h 14m2 stops
$600Scandinavian Airlines
Wed, Feb 18 - Wed, Feb 25
Turkish Airlines Logo
1:30 pm - 3:05 pm
IAD
-
LIS
20h 35m1 stop
Turkish Airlines Logo
6:05 am - 11:35 am
LIS
-
IAD
34h 30m1 stop
$604Turkish Airlines
Sun, Feb 8 - Wed, Apr 29
Scandinavian Airlines Logo
7:49 pm - 3:50 pm
IAD
-
LIS
39h 01m2 stops
Scandinavian Airlines Logo
4:55 pm - 7:09 pm
LIS
-
IAD
31h 14m2 stops
$605Scandinavian Airlines
Wed, Jan 21 - Wed, Jan 28
Turkish Airlines Logo
9:15 pm - 11:00 pm
IAD
-
LIS
20h 45m1 stop
Turkish Airlines Logo
4:05 pm - 7:20 pm
LIS
-
IAD
32h 15m1 stop
$611Turkish Airlines
Sun, Feb 15 - Mon, Feb 23

Royal Air Maroc flights from Washington, D.C. Dulles Intl Airport to Portugal

Our best Royal Air Maroc deals on Washington, D.C. Dulles Intl Airport to Portugal flight tickets
Royal Air Maroc
Mar 6
IAD8:45 pmWashington, D.C. Dulles Intl
9h 50m
1 stop
LIS11:35 amLisbon Humberto Delgado
Mar 14
LIS5:55 pmLisbon Humberto Delgado
29h 50m
1 stop
IAD7:45 pmWashington, D.C. Dulles Intl
Royal Air Maroc
Mar 13
IAD9:45 pmWashington, D.C. Dulles Intl
15h 10m
1 stop
LIS4:55 pmLisbon Humberto Delgado
Mar 21
LIS5:55 pmLisbon Humberto Delgado
29h 50m
1 stop
IAD7:45 pmWashington, D.C. Dulles Intl

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

Our best Turkish Airlines deals on Washington, D.C. Dulles Intl Airport to Portugal flight tickets
Turkish Airlines
Feb 8
IAD1:30 pmWashington, D.C. Dulles Intl
20h 35m
1 stop
LIS3:05 pmLisbon Humberto Delgado
Apr 29
LIS6:05 amLisbon Humberto Delgado
34h 30m
1 stop
IAD11:35 amWashington, D.C. Dulles Intl
Turkish Airlines
Feb 15
IAD9:15 pmWashington, D.C. Dulles Intl
20h 45m
1 stop
LIS11:00 pmLisbon Humberto Delgado
Feb 23
LIS11:40 amLisbon Humberto Delgado
29h 05m
1 stop
IAD11:45 amWashington, D.C. Dulles Intl
Turkish Airlines
Apr 7
IAD9:40 pmWashington, D.C. Dulles Intl
20h 55m
1 stop
LIS11:35 pmLisbon Humberto Delgado
Apr 13
LIS6:05 amLisbon Humberto Delgado
34h 30m
1 stop
IAD11:35 amWashington, D.C. Dulles Intl

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 December 18, 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.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Tue 1/20

5:40 pm-12:50 pm

1 stop14h 10m

Porto

Tue 1/27

6:00 am-2:35 pm

1 stop13h 35m

$436

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Mon 1/12

10:15 pm-11:15 am

2 stops32h 00m

Porto

Mon 1/19

12:05 pm-4:40 pm

1 stop33h 35m

$442

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Tue 1/20

5:45 pm-12:05 pm

1 stop13h 20m

Porto

Tue 1/27

6:00 am-3:50 pm

1 stop14h 50m

$457

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Mon 1/12

5:45 pm-12:05 pm

1 stop13h 20m

Porto

Mon 1/19

12:05 pm-4:40 pm

1 stop33h 35m

$458

Washington, D.C.Faro

IAD - FAO

IADFAO

Washington, D.C. Dulles Intl

Sun 1/18

10:30 pm-3:45 pm

1 stop12h 15m

Faro

Sun 1/25

4:35 pm-3:15 pm

1 stop27h 40m

$545

Washington, D.C.Faro

IAD - FAO

IADFAO

Washington, D.C. Dulles Intl

Sat 4/18

10:35 pm-11:50 pm

1 stop20h 15m

Faro

Sat 4/25

6:05 am-8:05 pm

1 stop19h 00m

$552

Washington, D.C.Lisbon

IAD - LIS

IADLIS

Washington, D.C. Dulles Intl

Wed 2/18

12:23 pm-8:55 am

2 stops39h 32m

Lisbon Humberto Delgado

Wed 2/25

4:55 pm-7:09 pm

2 stops31h 14m

$600

Washington, D.C.Lisbon

IAD - LIS

IADLIS

Washington, D.C. Dulles Intl

Sun 2/8

1:30 pm-3:05 pm

1 stop20h 35m

Lisbon Humberto Delgado

Wed 4/29

6:05 am-11:35 am

1 stop34h 30m

$604

Washington, D.C.Lisbon

IAD - LIS

IADLIS

Washington, D.C. Dulles Intl

Wed 1/21

7:49 pm-3:50 pm

2 stops39h 01m

Lisbon Humberto Delgado

Wed 1/28

4:55 pm-7:09 pm

2 stops31h 14m

$605

Washington, D.C.Lisbon

IAD - LIS

IADLIS

Washington, D.C. Dulles Intl

Sun 2/15

9:15 pm-11:00 pm

1 stop20h 45m

Lisbon Humberto Delgado

Mon 2/23

4:05 pm-7:20 pm

1 stop32h 15m

$611

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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 $705, 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 $719.

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 $713. 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 $877.

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 $837 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 $906 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 $747 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 20% 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

$323

Fastest flight time

7h 05m

Direct flights

Every day

Airports in Portugal

99 airports
The best one-way flight to Portugal from Washington, D.C. Dulles Intl Airport in the past 72 hours is $323. The best round-trip flight deal from Washington, D.C. Dulles Intl Airport to Portugal found on momondo in the last 72 hours is $547.
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 are 99 airports in Portugal. From Washington, D.C. Dulles Intl Airport there are direct flights to Lisbon Humberto Delgado (LIS).
  • 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
DeltaPriceFrom $439Free CancellationRating
7.9
8,008 reviews
Search Delta flights
SWISSPriceFrom $444Free CancellationRating
7.5
1,817 reviews
Search SWISS flights
United AirlinesPriceFrom $493Free CancellationRating
7.4
9,095 reviews
Search United Airlines flights
Scandinavian AirlinesPriceFrom $504Free CancellationRating
7.4
1,609 reviews
Search Scandinavian Airlines flights
TAP AIR PORTUGALPriceFrom $504Free CancellationRating
7.2
2,092 reviews
Search TAP AIR PORTUGAL flights
American AirlinesPriceFrom $508Free CancellationRating
7.2
11,054 reviews
Search American Airlines flights
British AirwaysPriceFrom $510Free CancellationRating
6.7
7,586 reviews
Search British Airways flights
IberiaPriceFrom $515Free CancellationRating
7.0
3,054 reviews
Search Iberia flights
Royal Air MarocPriceFrom $551Free CancellationRating
6.2
539 reviews
Search Royal Air Maroc flights
KLMPriceFrom $555Free CancellationRating
7.7
1,428 reviews
Search KLM 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.

An easier way to manage your Portugal trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Sat 1/17
Sat 1/24

Find better results for your trip to Portugal

Popular cities in Portugal

Popular flights according to clicks in the last 7 days on momondo