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Dulles Intl

$378+ 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
Nov 25 — Dec 21
Mon 11/25
Mon 12/2
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 November 20, 2024.

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 November 20, 2024.

This Gotogate deal was found by Cheapflights users on 11/20. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/166:00 amOPO - IAD
1 stop19h 20mLufthansa
Mon 12/305:50 pmIAD - OPO
1 stop12h 45mLufthansa
Deal found 11/20$517
This Mytrip deal was found by Cheapflights users on 11/18. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/412:15 pmLIS - IAD
2 stops31h 20mAustrian Airlines
Tue 12/106:00 pmIAD - LIS
2 stops23h 30mAustrian Airlines
Deal found 11/18$519
This United Airlines deal was found by Cheapflights users on 11/18. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/45:00 amLIS - IAD
1 stop15h 50mMultiple Airlines
Tue 12/1010:10 pmIAD - LIS
Nonstop7h 05mMultiple Airlines
Deal found 11/18$526
This United Airlines deal was found by Cheapflights users on 11/20. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/166:00 amOPO - IAD
2 stops30h 29mUnited Airlines
Mon 12/305:50 pmIAD - OPO
1 stop12h 45mUnited Airlines
Deal found 11/20$526
This Booking.com deal was found by Cheapflights users on 11/19. 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.
Fri 12/65:15 pmLIS - IAD
Nonstop8h 45mTAP AIR PORTUGAL
Tue 12/105:30 pmIAD - LIS
Nonstop7h 05mTAP AIR PORTUGAL
Deal found 11/19$527
This Lufthansa deal was found by Cheapflights users on 11/19. 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.
Fri 12/65:00 amLIS - IAD
1 stop15h 50mLufthansa
Tue 12/1010:10 pmIAD - LIS
Nonstop7h 05mLufthansa
Deal found 11/19$528
This United Airlines deal was found by Cheapflights users on 11/19. 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.
Wed 12/45:00 amLIS - IAD
2 stops21h 24mUnited Airlines
Mon 12/910:20 pmIAD - LIS
1 stop20h 10mUnited Airlines
Deal found 11/19$532
This Delta deal was found by Cheapflights users on 11/20. 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.
Tue 12/35:00 amLIS - IAD
1 stop15h 45mDelta
Thu 1/166:30 pmIAD - LIS
1 stop11h 50mDelta
Deal found 11/20$538
This Expedia deal was found by Cheapflights users on 11/20. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/166:15 amOPO - IAD
2 stops14h 35mMultiple Airlines
Mon 12/306:25 pmIAD - OPO
2 stops35h 50mMultiple Airlines
Deal found 11/20$547
This Virgin Atlantic deal was found by Cheapflights users on 11/20. 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 12/411:15 amLIS - IAD
2 stops15h 20mVirgin Atlantic
Mon 12/91:35 pmIAD - LIS
2 stops13h 25mVirgin Atlantic
Deal found 11/20$552
This Air Canada deal was found by Cheapflights users on 11/19. 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.
Tue 12/36:10 amLIS - IAD
2 stops20h 09mAir Canada
Thu 1/1610:35 amIAD - LIS
2 stops17h 45mAir Canada
Deal found 11/19$554
This AirNGo deal was found by Cheapflights users on 11/20. 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.
Sun 11/245:30 amLIS - IAD
1 stop18h 55mAir France
Thu 12/59:30 pmIAD - LIS
1 stop15h 00mAir France
Deal found 11/20$569

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 2,629,791 searches. Data last updated November 20, 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Mon 1/13

12:25 pm-7:45 pm

2 stops36h 20m

Washington, D.C. Dulles Intl

Sun 1/26

6:00 pm-8:00 pm

2 stops21h 00m

$465

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Mon 1/13

5:30 pm-3:35 pm

1 stop27h 05m

Washington, D.C. Dulles Intl

Sun 1/26

6:00 pm-8:00 pm

2 stops21h 00m

$511

LisbonWashington, D.C.

LIS - IAD

LISIAD

Lisbon Humberto Delgado

Fri 1/17

5:15 pm-9:00 pm

Nonstop8h 45m

Washington, D.C. Dulles Intl

Thu 1/30

5:30 pm-5:35 am

Nonstop7h 05m

$514

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Mon 12/16

6:00 am-8:20 pm

1 stop19h 20m

Washington, D.C. Dulles Intl

Mon 12/30

5:50 pm-11:35 am

1 stop12h 45m

$517

LisbonWashington, D.C.

LIS - IAD

LISIAD

Lisbon Humberto Delgado

Wed 12/4

12:15 pm-2:35 pm

2 stops31h 20m

Washington, D.C. Dulles Intl

Tue 12/10

6:00 pm-10:30 pm

2 stops23h 30m

$519

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Mon 12/16

6:00 am-7:29 am

2 stops30h 29m

Washington, D.C. Dulles Intl

Mon 12/30

5:50 pm-11:35 am

1 stop12h 45m

$526

LisbonWashington, D.C.

LIS - IAD

LISIAD

Lisbon Humberto Delgado

Wed 12/4

5:00 am-3:50 pm

1 stop15h 50m

Washington, D.C. Dulles Intl

Tue 12/10

10:10 pm-10:15 am

Nonstop7h 05m

$526

LisbonWashington, D.C.

LIS - IAD

LISIAD

Lisbon Humberto Delgado

Tue 12/24

5:00 am-8:20 pm

1 stop20h 20m

Washington, D.C. Dulles Intl

Tue 1/7

5:45 pm-8:10 am

1 stop9h 25m

$528

LisbonWashington, D.C.

LIS - IAD

LISIAD

Lisbon Humberto Delgado

Sun 12/15

12:15 pm-3:50 pm

1 stop32h 35m

Washington, D.C. Dulles Intl

Sun 12/29

5:50 pm-11:25 am

1 stop12h 35m

$534

LisbonWashington, D.C.

LIS - IAD

LISIAD

Lisbon Humberto Delgado

Tue 12/3

5:00 am-3:45 pm

1 stop15h 45m

Washington, D.C. Dulles Intl

Thu 1/16

12:05 pm-11:20 am

2 stops18h 15m

$538

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/19

Showing 1-10 of 56 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, September is the cheapest month in which you can book a flight from Portugal to Washington, D.C. Dulles Intl Airport (average of $300). Flying from Portugal to Washington, D.C. Dulles Intl Airport in June is currently the most expensive (average of $376). 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 November 20, 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 November 20, 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 November 20, 2024.
See what other customers who have flown with Austrian Airlines, Air Canada and Air France 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
8,756 reviews

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Overall

8.0

Crew

8.5

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
8,756 reviews
Delta
8.0
Very good
8,756 reviews

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Overall

8.0

Crew

8.5

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
1,350 reviews
Delta
8.0
Very good
8,756 reviews

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Overall

8.0

Crew

8.5

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
1,300 reviews
Delta
8.0
Very good
8,756 reviews

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Overall

8.0

Crew

8.5

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
805 reviews
Delta
8.0
Very good
8,756 reviews

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Overall

8.0

Crew

8.5

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
1,637 reviews
Delta
8.0
Very good
8,756 reviews

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Overall

8.0

Crew

8.5

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 Finnair ($474), Iberia ($477), and Royal Air Maroc ($480).

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

    Consider Air Canada (79%), United Airlines (79%) or Lufthansa (79%) 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 $527. On average you can expect to pay $1,435. The most popular route, (Lisbon Humberto Delgado - Washington, D.C. Dulles Intl), can usually be booked for $419.

  • 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, September is the cheapest month in which you can book a flight from Portugal to Washington, D.C. Dulles Intl Airport (average of $300). Flying from Portugal to Washington, D.C. Dulles Intl Airport in June is currently the most expensive (average of $376). 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.

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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.
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Stansted to Baltimore flights
Gatwick to Reagan-National flights
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Frederic Chopin to Baltimore flights
Amsterdam to Baltimore flights
Stansted to Dulles Intl flights
Frederic Chopin to Reagan-National flights
Berlin to Dulles Intl flights
Dublin to Dulles Intl flights
Vienna to Reagan-National flights
Vienna to Baltimore flights
Bilbao to Dulles Intl flights
Berlin to Baltimore flights
Budapest to Dulles Intl flights
Barcelona-El Prat to Reagan-National flights
Madrid to Baltimore flights
Luton to Baltimore flights
Bruxelles-National to Reagan-National flights
Zurich to Dulles Intl flights
Budapest to Reagan-National flights
Amsterdam to Reagan-National flights
Luton to Dulles Intl flights
Barcelona-El Prat 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 2,629,791 searches. Data last updated November 20, 2024.
AirlineCheapestAverageFlexibilityOn-time
TAP AIR PORTUGALCheapest$501Average$761FlexibilityNo cancel feeOn-timeN/A
LufthansaCheapest$536Average$779FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$549Average$721FlexibilityNo cancel feeOn-time69%
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