Latest deals
Insights
FAQs
Reviews
Price Alerts

Cheap flights from Washington, D.C. Dulles Intl Airport to Portugal from $286

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 12/1. 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.
Search flight deals

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.
Multiple Airlines Logo
5:25 pm - 11:15 amIAD-OPO
12h 50m1 stop
Multiple Airlines Logo
12:30 pm - 11:21 pmOPO-IAD
15h 51m2 stops
$488Multiple Airlines
Find Deal
Wed, Nov 19 - Tue, Dec 16
Delta Logo
12:36 pm - 10:30 amIAD-OPO
16h 54m2 stops
Delta Logo
11:15 am - 12:16 amOPO-IAD
18h 01m2 stops
$492Delta
Find Deal
Tue, Nov 11 - Tue, Nov 18
Air Canada Logo
9:45 am - 1:15 pmIAD-OPO
22h 30m2 stops
Air Canada Logo
6:00 am - 8:59 pmOPO-IAD
43h 59m2 stops
$495Air Canada
Find Deal
Wed, Dec 3 - Mon, Dec 8
TAP AIR PORTUGAL Logo
5:30 pm - 9:55 amIAD-OPO
11h 25m1 stop
TAP AIR PORTUGAL Logo
10:55 am - 9:00 pmOPO-IAD
15h 05m1 stop
$497TAP AIR PORTUGAL
Find Deal
Thu, Feb 12 - Wed, Feb 18
United Airlines Logo
12:50 pm - 11:40 amIAD-OPO
17h 50m2 stops
United Airlines Logo
6:00 am - 8:26 pmOPO-IAD
43h 26m2 stops
$499United Airlines
Find Deal
Wed, Dec 3 - Wed, Dec 10
United Airlines Logo
12:50 pm - 11:40 amIAD-OPO
17h 50m2 stops
United Airlines Logo
6:00 am - 9:14 pmOPO-IAD
20h 14m2 stops
$503United Airlines
Find Deal
Wed, Dec 3 - Wed, Dec 17
Lufthansa Logo
6:00 pm - 11:40 amIAD-OPO
12h 40m1 stop
Lufthansa Logo
6:00 am - 3:50 pmOPO-IAD
14h 50m1 stop
$513Lufthansa
Find Deal
Thu, Jan 15 - Sun, Jan 18
Lufthansa Logo
6:00 pm - 2:45 pmIAD-OPO
15h 45m1 stop
Lufthansa Logo
6:00 am - 3:50 pmOPO-IAD
14h 50m1 stop
$516Lufthansa
Find Deal
Fri, Feb 20 - Sat, Feb 28
TAP AIR PORTUGAL Logo
10:30 pm - 5:00 pmIAD-OPO
13h 30m1 stop
TAP AIR PORTUGAL Logo
8:00 pm - 2:35 pmOPO-IAD
23h 35m1 stop
$519TAP AIR PORTUGAL
Find Deal
Fri, Dec 5 - Mon, Dec 8
Royal Air Maroc Logo
8:45 pm - 11:35 amIAD-LIS
9h 50m1 stop
Royal Air Maroc Logo
11:35 am - 6:45 pmLIS-IAD
12h 10m1 stop
$596Royal Air Maroc
Find Deal
Sun, Jan 18 - Wed, Jan 28

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
Feb 4
IAD7:49 pmWashington, D.C. Dulles Intl
39h 01m
2 stops
LIS3:50 pmLisbon Humberto Delgado
Feb 13
LIS7:00 amLisbon Humberto Delgado
40h 50m
2 stops
IAD6:50 pmWashington, D.C. Dulles Intl
$543
Find similar
Scandinavian Airlines
Mar 2
IAD7:59 pmWashington, D.C. Dulles Intl
39h 06m
2 stops
LIS4:05 pmLisbon Humberto Delgado
Mar 6
LIS6:55 amLisbon Humberto Delgado
17h 17m
2 stops
IAD7:12 pmWashington, D.C. Dulles Intl
$544
Find similar
Scandinavian Airlines
Mar 14
IAD12:30 pmWashington, D.C. Dulles Intl
23h 35m
2 stops
LIS4:05 pmLisbon Humberto Delgado
Mar 21
LIS7:05 amLisbon Humberto Delgado
16h 45m
1 stop
IAD7:50 pmWashington, D.C. Dulles Intl
$546
Find similar

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
Nov 11
IAD1:30 pmWashington, D.C. Dulles Intl
20h 35m
1 stop
LIS3:05 pmLisbon Humberto Delgado
Nov 18
LIS4:05 pmLisbon Humberto Delgado
24h 40m
1 stop
IAD11:45 amWashington, D.C. Dulles Intl
$561
Find similar
Turkish Airlines
Nov 4
IAD1:30 pmWashington, D.C. Dulles Intl
16h 10m
1 stop
LIS10:40 amLisbon Humberto Delgado
Nov 11
LIS4:05 pmLisbon Humberto Delgado
24h 40m
1 stop
IAD11:45 amWashington, D.C. Dulles Intl
$570
Find similar
Turkish Airlines
Nov 26
IAD1:30 pmWashington, D.C. Dulles Intl
20h 35m
1 stop
LIS3:05 pmLisbon Humberto Delgado
Dec 3
LIS4:05 pmLisbon Humberto Delgado
32h 15m
1 stop
IAD7:20 pmWashington, D.C. Dulles Intl
$571
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 October 30, 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

Wed 11/19

5:25 pm-11:15 am

1 stop12h 50m

Porto

Tue 12/16

12:30 pm-11:21 pm

2 stops15h 51m

$488

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Tue 11/11

12:36 pm-10:30 am

2 stops16h 54m

Porto

Tue 11/18

11:15 am-12:16 am

2 stops18h 01m

$492

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Wed 12/3

9:45 am-1:15 pm

2 stops22h 30m

Porto

Mon 12/8

6:00 am-8:59 pm

2 stops43h 59m

$495

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Thu 2/12

5:30 pm-9:55 am

1 stop11h 25m

Porto

Wed 2/18

10:55 am-9:00 pm

1 stop15h 05m

$497

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Wed 12/3

12:50 pm-11:40 am

2 stops17h 50m

Porto

Wed 12/10

6:00 am-8:26 pm

2 stops43h 26m

$499

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Wed 12/3

12:50 pm-11:40 am

2 stops17h 50m

Porto

Wed 12/17

6:00 am-9:14 pm

2 stops20h 14m

$503

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Thu 1/15

6:00 pm-11:40 am

1 stop12h 40m

Porto

Sun 1/18

6:00 am-3:50 pm

1 stop14h 50m

$513

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Fri 2/20

6:00 pm-2:45 pm

1 stop15h 45m

Porto

Sat 2/28

6:00 am-3:50 pm

1 stop14h 50m

$516

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Fri 12/5

10:30 pm-5:00 pm

1 stop13h 30m

Porto

Mon 12/8

8:00 pm-2:35 pm

1 stop23h 35m

$519

Washington, D.C.Lisbon

IAD - LIS

IADLIS

Washington, D.C. Dulles Intl

Sun 1/18

8:45 pm-11:35 am

1 stop9h 50m

Lisbon Humberto Delgado

Wed 1/28

11:35 am-6:45 pm

1 stop12h 10m

$596

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 $716, 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 $711. 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 $883.

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 $839 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 $911 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 $730 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 35% 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

$289

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 $289. The best round-trip flight deal from Washington, D.C. Dulles Intl Airport to Portugal found on momondo in the last 72 hours is $471.
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
United AirlinesPriceFrom $493Free CancellationRating
7.4
8,996 reviews
Search United Airlines flights
Scandinavian AirlinesPriceFrom $504Free CancellationRating
7.4
1,548 reviews
Search Scandinavian Airlines flights
TAP AIR PORTUGALPriceFrom $506Free CancellationRating
7.1
2,040 reviews
Search TAP AIR PORTUGAL flights
American AirlinesPriceFrom $508Free CancellationRating
7.2
11,034 reviews
Search American Airlines flights
British AirwaysPriceFrom $510Free CancellationRating
6.7
7,488 reviews
Search British Airways flights
IberiaPriceFrom $515Free CancellationRating
7.0
3,004 reviews
Search Iberia flights
DeltaPriceFrom $533Free CancellationRating
7.9
7,998 reviews
Search Delta flights
Royal Air MarocPriceFrom $552Free CancellationRating
6.2
525 reviews
Search Royal Air Maroc flights
KLMPriceFrom $555Free CancellationRating
7.7
1,406 reviews
Search KLM flights
Turkish AirlinesPriceFrom $586Free CancellationRating
7.3
4,033 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.

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.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Sat 11/29
Sat 12/6
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Portugal

Popular cities in Portugal

Popular flights according to clicks in the last 7 days on momondo
Flights to Lisbonfrom $351
Flights to Portofrom $346
Flights to Funchalfrom $401
Flights to Farofrom $392
Flights to Ponta Delgadafrom $391
Flights to Lajesfrom $482
Flights to Hortafrom $592
Flights to Pico Islandfrom $563
Flights to Porto Santofrom $956
Flights to Velasfrom $560