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Dulles Intl

$482+ 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 3/1. Fares are subject to change and may not be available on all flights or dates of travel.
LIS — IAD
Dec 23 — Dec 301
Mon 12/23
Mon 12/30
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 December 18, 2024.

Round-trip from

$510
(Delta)

One-way from

$482
(Cheapflightsfares)
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 December 18, 2024.

This KLM deal was found by Cheapflights users on 12/17. 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 12/273:25 pmLIS - IAD
1 stop29h 20mMultiple Airlines
Tue 1/146:30 pmIAD - LIS
1 stop11h 50mMultiple Airlines
Deal found 12/17$540
This Delta deal was found by Cheapflights users on 12/17. 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.
Fri 12/2710:00 amLIS - IAD
1 stop11h 47mDelta
Tue 1/1412:05 pmIAD - LIS
2 stops18h 15mDelta
Deal found 12/17$551
This Virgin Atlantic deal was found by Cheapflights users on 12/17. 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.
Fri 12/2710:00 amLIS - IAD
1 stop11h 47mVirgin Atlantic
Tue 1/146:00 amIAD - LIS
2 stops21h 00mVirgin Atlantic
Deal found 12/17$554
This United Airlines deal was found by Cheapflights users on 12/17. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/2711:00 amLIS - IAD
2 stops29h 38mUnited Airlines
Tue 1/146:05 amIAD - LIS
2 stops22h 15mUnited Airlines
Deal found 12/17$632
This Lufthansa deal was found by Cheapflights users on 12/18. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/2111:55 amLIS - IAD
Nonstop8h 40mLufthansa
Sat 12/2810:05 pmIAD - LIS
Nonstop6h 55mLufthansa
Deal found 12/18$810
This Lufthansa deal was found by Cheapflights users on 12/18. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/215:35 amLIS - IAD
1 stop15h 50mSWISS
Sat 12/288:45 pmIAD - LIS
1 stop12h 50mSWISS
Deal found 12/18$923
This oojo deal was found by Cheapflights users on 12/17. 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.
Mon 12/239:15 amLIS - IAD
Nonstop8h 45mTAP AIR PORTUGAL
Sat 1/115:30 pmIAD - LIS
Nonstop7h 05mTAP AIR PORTUGAL
Deal found 12/17$1,047
This Air Canada deal was found by Cheapflights users on 12/17. 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 Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/1910:55 amLIS - IAD
2 stops26h 10mAir Canada
Sat 1/410:35 amIAD - LIS
2 stops17h 45mAir Canada
Deal found 12/17$1,061
This Austrian Airlines deal was found by Cheapflights users on 12/17. 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 Austrian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/222:10 pmLIS - IAD
2 stops53h 25mAustrian Airlines
Thu 1/26:00 pmIAD - LIS
2 stops36h 30mAustrian Airlines
Deal found 12/17$1,240
This Brussels Airlines deal was found by Cheapflights users on 12/18. 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 Brussels Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/211:45 pmLIS - IAD
2 stops30h 10mBrussels Airlines
Sat 12/285:50 pmIAD - LIS
1 stop14h 00mBrussels Airlines
Deal found 12/18$1,404
This Gotogate deal was found by Cheapflights users on 12/17. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/173:25 pmLIS - IAD
1 stop29h 20mKLM
Sat 12/215:35 pmIAD - LIS
1 stop12h 00mKLM
Deal found 12/17$1,440
This Gotogate deal was found by Cheapflights users on 12/17. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/176:30 pmLIS - IAD
1 stop26h 45mAir France
Sat 12/215:35 pmIAD - LIS
2 stops16h 35mAir France
Deal found 12/17$1,732

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 December 18, 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

LisbonWashington, D.C.

LIS - IAD

LISIAD

Lisbon Humberto Delgado

Thu 1/23

5:30 am-4:15 pm

1 stop15h 45m

Washington, D.C. Dulles Intl

Wed 2/5

12:05 pm-11:20 am

2 stops18h 15m

$511

LisbonWashington, D.C.

LIS - IAD

LISIAD

Lisbon Humberto Delgado

Thu 1/23

3:25 pm-3:45 pm

1 stop29h 20m

Washington, D.C. Dulles Intl

Wed 2/5

12:05 pm-8:00 am

1 stop14h 55m

$514

LisbonWashington, D.C.

LIS - IAD

LISIAD

Lisbon Humberto Delgado

Thu 1/23

5:00 am-9:21 pm

2 stops21h 21m

Washington, D.C. Dulles Intl

Wed 2/5

8:22 am-8:10 am

1 stop18h 48m

$529

LisbonWashington, D.C.

LIS - IAD

LISIAD

Lisbon Humberto Delgado

Fri 5/16

8:25 am-4:05 pm

1 stop12h 40m

Washington, D.C. Dulles Intl

Mon 5/26

5:50 pm-12:45 pm

1 stop13h 55m

$531

LisbonWashington, D.C.

LIS - IAD

LISIAD

Lisbon Humberto Delgado

Thu 1/23

11:15 am-3:00 pm

Nonstop8h 45m

Washington, D.C. Dulles Intl

Wed 2/5

10:30 pm-10:35 am

Nonstop7h 05m

$533

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Mon 3/17

12:05 pm-3:30 pm

1 stop31h 25m

Washington, D.C. Dulles Intl

Mon 3/31

10:20 pm-11:20 pm

1 stop20h 00m

$536

LisbonWashington, D.C.

LIS - IAD

LISIAD

Lisbon Humberto Delgado

Thu 1/23

10:55 am-11:58 pm

2 stops18h 03m

Washington, D.C. Dulles Intl

Wed 2/5

6:00 pm-5:45 pm

1 stop18h 45m

$548

LisbonWashington, D.C.

LIS - IAD

LISIAD

Lisbon Humberto Delgado

Fri 1/31

7:05 am-3:35 pm

1 stop13h 30m

Washington, D.C. Dulles Intl

Sun 2/16

9:55 pm-9:45 pm

1 stop18h 50m

$551

LisbonWashington, D.C.

LIS - IAD

LISIAD

Lisbon Humberto Delgado

Fri 1/31

6:10 am-3:55 pm

1 stop14h 45m

Washington, D.C. Dulles Intl

Sun 2/16

5:50 pm-3:05 pm

1 stop16h 15m

$552

LisbonWashington, D.C.

LIS - IAD

LISIAD

Lisbon Humberto Delgado

Thu 1/23

7:00 am-3:35 pm

1 stop13h 35m

Washington, D.C. Dulles Intl

Wed 2/5

9:55 pm-9:50 pm

1 stop18h 55m

$575

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/18

Showing 1-10 of 41 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, November is the cheapest month in which you can book a flight from Portugal to Washington, D.C. Dulles Intl Airport (average of $299). Flying from Portugal to Washington, D.C. Dulles Intl Airport in June is currently the most expensive (average of $377). 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 December 18, 2024.

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.

Weekly flight availability from Portugal to Washington, D.C. Dulles Intl Airport

Explore weekly flight availability from Portugal to Dulles Intl. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated December 18, 2024.

The most flights from PT0 to IAD are scheduled on a Monday (5 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (2 on average).

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 December 18, 2024.
See what other customers who have flown with United Airlines, TAP AIR PORTUGAL and SWISS 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
8,604 reviews

Comfort

7.9

Overall

8.0

Entertainment

7.9

Boarding

8.2

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
8,604 reviews
Delta
8.0
Very good
8,604 reviews

Comfort

7.9

Overall

8.0

Entertainment

7.9

Boarding

8.2

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
1,349 reviews
Delta
8.0
Very good
8,604 reviews

Comfort

7.9

Overall

8.0

Entertainment

7.9

Boarding

8.2

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
7.7
Good
1,285 reviews
Delta
8.0
Very good
8,604 reviews

Comfort

7.9

Overall

8.0

Entertainment

7.9

Boarding

8.2

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
787 reviews
Delta
8.0
Very good
8,604 reviews

Comfort

7.9

Overall

8.0

Entertainment

7.9

Boarding

8.2

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
7.6
Good
1,606 reviews
Delta
8.0
Very good
8,604 reviews

Comfort

7.9

Overall

8.0

Entertainment

7.9

Boarding

8.2

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 British Airways ($482), Finnair ($484), and Royal Air Maroc ($523).

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

    Consider Air Canada (84%), United Airlines (84%) or Lufthansa (84%) 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 $517. On average you can expect to pay $1,240. The most popular route, (Lisbon Humberto Delgado - Washington, D.C. Dulles Intl), can usually be booked for $454.

  • 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, November is the cheapest month in which you can book a flight from Portugal to Washington, D.C. Dulles Intl Airport (average of $299). Flying from Portugal to Washington, D.C. Dulles Intl Airport in June is currently the most expensive (average of $377). 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

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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.
Heathrow to Dulles Intl flights
Heathrow to Baltimore flights
Charles de Gaulle to Dulles Intl flights
Frankfurt to Dulles Intl flights
Gatwick to Dulles Intl flights
Frankfurt to Baltimore flights
Heathrow to Reagan-National flights
Gatwick to Baltimore flights
Bruxelles-National to Dulles Intl flights
Istanbul to Dulles Intl flights
London City to Dulles Intl flights
Charles de Gaulle to Reagan-National flights
Orly to Dulles Intl flights
Charles de Gaulle to Baltimore flights
Frankfurt to Reagan-National flights
Frederic Chopin to Dulles Intl flights
Munich to Dulles Intl flights
Dublin to Dulles Intl flights
Stansted to Baltimore flights
Amsterdam to Dulles Intl flights
Bruxelles-National to Baltimore flights
Gatwick to Reagan-National flights
Frederic Chopin to Baltimore flights
Vienna to Dulles Intl flights
Madrid to Dulles Intl flights
Frederic Chopin to Reagan-National flights
Leonardo da Vinci/Fiumicino to Dulles Intl flights
Istanbul to Baltimore flights
Zurich to Dulles Intl flights
Bruxelles-National to Reagan-National flights
Istanbul to Reagan-National flights
Luton to Dulles Intl flights
Madrid to Reagan-National flights
Geneva to Dulles Intl flights
Madrid to Baltimore flights
Athens to Dulles Intl flights
Munich to Reagan-National flights
Berlin to Dulles Intl flights
Vienna to Baltimore flights
Munich to Baltimore flights
Luton to Baltimore flights
Stansted to Dulles Intl flights
Dublin to Baltimore flights
Sabiha Gokcen to Dulles Intl flights
Frankfurt-Hahn to Baltimore flights
Berlin to Baltimore flights
Athens 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 December 18, 2024.
AirlineCheapestAverageFlexibilityOn-time
TAP AIR PORTUGALCheapest$501Average$765FlexibilityNo cancel feeOn-timeN/A
LufthansaCheapest$536Average$779FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$543Average$711FlexibilityNo cancel feeOn-time69%
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