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Dulles Intl

$347+ Cheap flights from Portugal to Dulles Intl (IAD)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/25. Fares are subject to change and may not be available on all flights or dates of travel.
LIS — IAD
Jan 26 — Feb 21
Sun 1/26
Sun 2/2
1 adult, Economy
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Cheap flight deals from Portugal to Dulles Intl

Discover tips and strategies to find the most affordable flight options for your journey from Portugal (PT0) to Dulles Intl (IAD). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated January 21, 2025.

Round-trip from

$459
(Delta)

One-way from

$347
(oojo)
From Portugal to Washington, D.C. Dulles Intl
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One-way flight from Portugal to Washington, D.C. Dulles Intl
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Find flight deals from Portugal to Dulles Intl

Cheapest flights from Portugal to Dulles Intl
Explore the most affordable flight options available from Portugal to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 21, 2025.

This AirNGo deal was found by Cheapflights users on 1/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure AirNGo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/112:10 pmLIS - IAD
1 stop12h 05mAir France
Sat 5/109:20 pmIAD - LIS
1 stop12h 30mAir France
Deal found 1/20$458
This Delta deal was found by Cheapflights users on 1/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/195:00 amLIS - IAD
1 stop15h 45mDelta
Mon 3/247:59 pmIAD - LIS
2 stops15h 11mDelta
Deal found 1/20$459
This Air France deal was found by Cheapflights users on 1/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/215:00 amLIS - IAD
1 stop15h 45mMultiple Airlines
Fri 4/46:30 pmIAD - LIS
1 stop11h 45mMultiple Airlines
Deal found 1/20$460
This American Airlines deal was found by Cheapflights users on 1/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/96:35 amLIS - IAD
1 stop13h 25mAmerican Airlines
Fri 5/237:25 pmIAD - LIS
1 stop15h 10mAmerican Airlines
Deal found 1/20$466
This KLM deal was found by Cheapflights users on 1/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/215:00 amLIS - IAD
1 stop15h 45mKLM
Sat 4/512:11 pmIAD - LIS
1 stop14h 49mKLM
Deal found 1/20$469
This Booking.com deal was found by Cheapflights users on 1/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/117:05 amLIS - IAD
1 stop13h 30mBritish Airways
Mon 3/177:00 pmIAD - LIS
1 stop13h 10mBritish Airways
Deal found 1/20$473
This Air France deal was found by Cheapflights users on 1/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/256:00 amOPO - IAD
1 stop14h 45mMultiple Airlines
Mon 3/107:30 pmIAD - OPO
1 stop11h 20mMultiple Airlines
Deal found 1/20$473
This Delta deal was found by Cheapflights users on 1/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/36:20 amOPO - IAD
2 stops17h 36mDelta
Mon 2/176:30 pmIAD - OPO
1 stop11h 20mDelta
Deal found 1/20$478
This KLM deal was found by Cheapflights users on 1/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/1411:25 amOPO - IAD
1 stop33h 10mKLM
Sat 5/319:20 pmIAD - OPO
1 stop13h 10mKLM
Deal found 1/20$479
This Virgin Atlantic deal was found by Cheapflights users on 1/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Virgin Atlantic is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/1910:00 amLIS - IAD
2 stops19h 20mVirgin Atlantic
Wed 2/2610:03 amIAD - LIS
2 stops15h 32mVirgin Atlantic
Deal found 1/20$483
This oojo deal was found by Cheapflights users on 1/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/2510:45 amLIS - IAD
Nonstop8h 45mTAP AIR PORTUGAL
Sun 3/305:45 pmIAD - LIS
Nonstop7h 20mTAP AIR PORTUGAL
Deal found 1/20$488
This AirNGo deal was found by Cheapflights users on 1/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure AirNGo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/314:20 pmOPO - IAD
2 stops28h 15mAir France
Thu 5/159:20 pmIAD - OPO
1 stop13h 10mAir France
Deal found 1/20$507

Find flights from Portugal to Dulles Intl within your budget

Customize your flight search to find flights from Portugal to Dulles Intl 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, Cheapflights users made 2,558,603 searches. Data last updated January 21, 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

LisbonWashington, D.C.

LIS - IAD

LISIAD

Lisbon Humberto Delgado

Thu 5/1

12:10 pm-7:15 pm

1 stop12h 05m

Washington, D.C. Dulles Intl

Sat 5/10

9:20 pm-2:50 pm

1 stop12h 30m

$458

LisbonWashington, D.C.

LIS - IAD

LISIAD

Lisbon Humberto Delgado

Wed 3/19

5:00 am-4:45 pm

1 stop15h 45m

Washington, D.C. Dulles Intl

Mon 3/24

7:59 pm-3:10 pm

2 stops15h 11m

$459

LisbonWashington, D.C.

LIS - IAD

LISIAD

Lisbon Humberto Delgado

Fri 3/21

5:00 am-4:45 pm

1 stop15h 45m

Washington, D.C. Dulles Intl

Fri 4/4

6:30 pm-11:15 am

1 stop11h 45m

$460

LisbonWashington, D.C.

LIS - IAD

LISIAD

Lisbon Humberto Delgado

Fri 5/9

6:35 am-3:00 pm

1 stop13h 25m

Washington, D.C. Dulles Intl

Fri 5/23

7:25 pm-3:35 pm

1 stop15h 10m

$466

LisbonWashington, D.C.

LIS - IAD

LISIAD

Lisbon Humberto Delgado

Fri 3/21

5:00 am-4:45 pm

1 stop15h 45m

Washington, D.C. Dulles Intl

Sat 4/5

12:11 pm-8:00 am

1 stop14h 49m

$469

LisbonWashington, D.C.

LIS - IAD

LISIAD

Lisbon Humberto Delgado

Tue 3/11

7:05 am-4:35 pm

1 stop13h 30m

Washington, D.C. Dulles Intl

Mon 3/17

7:00 pm-12:10 pm

1 stop13h 10m

$473

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Tue 2/25

6:00 am-3:45 pm

1 stop14h 45m

Washington, D.C. Dulles Intl

Tue 3/11

7:30 pm-10:35 am

1 stop11h 05m

$473

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Mon 2/3

6:20 am-6:56 pm

2 stops17h 36m

Washington, D.C. Dulles Intl

Mon 2/17

6:30 pm-10:50 am

1 stop11h 20m

$478

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Wed 5/14

11:25 am-3:35 pm

1 stop33h 10m

Washington, D.C. Dulles Intl

Sat 5/31

9:20 pm-3:30 pm

1 stop13h 10m

$479

LisbonWashington, D.C.

LIS - IAD

LISIAD

Lisbon Humberto Delgado

Wed 2/19

10:00 am-12:20 am

2 stops19h 20m

Washington, D.C. Dulles Intl

Wed 2/26

10:03 am-6:35 am

2 stops15h 32m

$483

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/20

Showing 1-10 of 54 results
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Best time to book a flight from Portugal to Dulles Intl

Have a flexible travel schedule? Discover the best time to fly to Dulles Intl from Portugal with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Travel insights for flights from Portugal to Dulles Intl

Get recent, data-driven insights about flights from Portugal to Dulles Intl including ideal travel times, pricing trends, and more.

What is the cheapest month to book a flight from Portugal to Washington, D.C. Dulles Intl Airport?

Currently, August is the cheapest month in which you can book a flight from Portugal to Washington, D.C. Dulles Intl Airport (average of $309). Flying from Portugal to Washington, D.C. Dulles Intl Airport in June is currently the most expensive (average of $389). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from PT to IAD?

Find hourly flight availability from Portugal to Dulles Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated January 21, 2025.

When flying from Portugal to Washington, D.C. Dulles Intl Airport, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Rainfall in Dulles Intl by month

Plan your trip to Dulles Intl by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Washington, D.C. Dulles Intl Airport ranges from 2.6 - 4.0 inches per month. May is typically the wettest month, when rainfall can reach 4.0 in. February is typically the driest time to visit Washington, D.C. Dulles Intl Airport when rainfall is around 2.6 in.

Temperature in Dulles Intl by month

Plan your trip to Dulles Intl by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Washington, D.C. Dulles Intl Airport, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 35.6 F).

Reviews of airlines servicing Dulles Intl

Get insights into the airlines that provide service to Dulles Intl. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Dulles Intl. Reviews last updated January 21, 2025.
See what other customers who have flown with TAP AIR PORTUGAL, Air France and Lufthansa from Portugal to Washington, D.C. have to say. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
8,521 reviews

Entertainment

7.9

Boarding

8.2

Overall

8.0

Comfort

8.0

Crew

8.6

Food

7.3

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Delta
8.0
Very good
8,521 reviews
Delta
8.0
Very good
8,521 reviews

Entertainment

7.9

Boarding

8.2

Overall

8.0

Comfort

8.0

Crew

8.6

Food

7.3

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

KLM
7.8
Good
1,341 reviews
Delta
8.0
Very good
8,521 reviews

Entertainment

7.9

Boarding

8.2

Overall

8.0

Comfort

8.0

Crew

8.6

Food

7.3

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Finnair
7.6
Good
1,285 reviews
Delta
8.0
Very good
8,521 reviews

Entertainment

7.9

Boarding

8.2

Overall

8.0

Comfort

8.0

Crew

8.6

Food

7.3

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Austrian Airlines
7.6
Good
786 reviews
Delta
8.0
Very good
8,521 reviews

Entertainment

7.9

Boarding

8.2

Overall

8.0

Comfort

8.0

Crew

8.6

Food

7.3

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

SWISS
7.5
Good
1,599 reviews
Delta
8.0
Very good
8,521 reviews

Entertainment

7.9

Boarding

8.2

Overall

8.0

Comfort

8.0

Crew

8.6

Food

7.3

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Related info for your journey

Find useful and relevant information for your journey from Portugal to Dulles Intl. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What are the cheapest airlines to fly from Portugal to Washington, D.C. Dulles Intl Airport one-way?

    The cheapest airlines for a one-way flight from Portugal to Washington, D.C. Dulles Intl Airport are Royal Air Maroc ($347), British Airways ($481), and SWISS ($514).

  • What are the most reliable airlines from Portugal to Washington, D.C. Dulles Intl Airport?

    Consider JetBlue (84%), TAP AIR PORTUGAL (83%) or Air Canada (81%) when booking your flight. These represent the most reliable airlines when flying from Portugal to Washington, D.C. Dulles Intl Airport.

  • What are the cheapest flights from Portugal to Washington, D.C. Dulles Intl Airport?

    The cheapest flight price from Portugal to Washington, D.C. Dulles Intl Airport is $526. On average you can expect to pay $1,305. The most popular route, (Lisbon Humberto Delgado - Washington, D.C. Dulles Intl), can usually be booked for $459.

  • Can I find deals for flights from Portugal to Dulles Intl that include hotel bookings?

    Yes. In addition to deals on Portugal to Dulles Intl flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Portugal to Dulles Intl?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Portugal to Dulles Intl.

  • Can I find deals for business class flights from Portugal to Dulles Intl?

    Yes. Cheapflights offers flight deals from Portugal to Dulles Intl by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Portugal to Washington, D.C. Dulles Intl Airport?

    Currently, August is the cheapest month in which you can book a flight from Portugal to Washington, D.C. Dulles Intl Airport (average of $309). Flying from Portugal to Washington, D.C. Dulles Intl Airport in June is currently the most expensive (average of $389). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Portugal?

Book flights to Portugal if you plan to visit one of these locations
Fairfax
Arlington
Alexandria
Springfield
Silver Spring
Rockville
Tysons
Gaithersburg
Fredericksburg
Linthicum Heights
Laurel
Falls Church
Greenbelt
Sterling
Easton
Oxon Hill
Herndon
Woodbridge
Bowie
Reston

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Alternative routes for Portugal to Dulles Intl

See prices for flight routes from nearby airports that may be better suited for you.
Frankfurt to Dulles Intl flights
Charles de Gaulle to Dulles Intl flights
Heathrow to Dulles Intl flights
Heathrow to Baltimore flights
Frankfurt to Baltimore flights
Charles de Gaulle to Reagan-National flights
Orly to Dulles Intl flights
Charles de Gaulle to Baltimore flights
Amsterdam to Dulles Intl flights
Heathrow to Reagan-National flights
Bruxelles-National to Dulles Intl flights
Frederic Chopin to Baltimore flights
Frankfurt to Reagan-National flights
Gatwick to Dulles Intl flights
Istanbul to Dulles Intl flights
Leonardo da Vinci/Fiumicino to Dulles Intl flights
Madrid to Dulles Intl flights
Frederic Chopin to Dulles Intl flights
London City to Dulles Intl flights
Vienna to Dulles Intl flights
Munich to Dulles Intl flights
Gatwick to Baltimore flights
Dublin to Dulles Intl flights
Barcelona-El Prat to Dulles Intl flights
Frederic Chopin to Reagan-National flights
Stansted to Baltimore flights
Gatwick to Reagan-National flights
Leonardo da Vinci/Fiumicino to Baltimore flights
Frankfurt-Hahn to Baltimore flights
Leonardo da Vinci/Fiumicino to Reagan-National flights
Berlin to Baltimore flights
Madrid to Reagan-National flights
Amsterdam to Baltimore flights
Berlin to Dulles Intl flights
Bruxelles-National to Reagan-National flights
Zurich to Dulles Intl flights
Vienna to Reagan-National flights
Stansted to Dulles Intl flights
Madrid to Baltimore flights
Barcelona-El Prat to Baltimore flights
Ciampino to Baltimore flights
Luton to Dulles Intl flights
Berlin to Reagan-National flights
Amsterdam to Reagan-National flights
Barcelona-El Prat to Reagan-National flights
Bruxelles-National to Baltimore flights

Top 3 airlines flying from Portugal to Dulles Intl

Discover the top 3 airlines that operate flights from Portugal to Dulles Intl. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated January 21, 2025.
AirlineCheapestAverageFlexibilityOn-time
TAP AIR PORTUGALCheapest$501Average$769FlexibilityNo cancel feeOn-timeN/A
LufthansaCheapest$536Average$779FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$549Average$709FlexibilityNo cancel feeOn-time69%
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