Dulles Intl

$462+ Cheap flights from London (LON) 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 2/23. Fares are subject to change and may not be available on all flights or dates of travel.
LON — IAD
Dec 25 — Jan 11
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The best prices from London to Washington, D.C. Dulles Intl are usually found in April or November, booked 85 days in advance, depart on a Thursday or Wednesday and return on a Wednesday

Cheap flight deals from London to Dulles Intl

Discover tips and strategies to find the most affordable flight options for your journey from London (LON) 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 20, 2024.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$558
(Austrian Airlines)

One-way from

$462
(Trip.com)

Popular in

June

Cheapest in

April

Average price

$864
Provider with most accurate pricing for London (LON)-Washington, D.C. Dulles Intl flight deals.
Provider most trusted by Cheapflights users for London (LON)-Washington, D.C. Dulles Intl flights.
From London (LON) to Washington, D.C. Dulles Intl
One-way flight from London (LON) to Washington, D.C. Dulles Intl
High demand for flights, 8% potential price rise
Best time to find cheap flights, 1% potential price drop
Average for round-trip flights in December 2024

Find flight deals from London to Dulles Intl

Cheapest flights from London to Dulles Intl
Explore the most affordable flight options available from London to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 20, 2024.

This ChecknFly deal was found by Cheapflights users on 12/20. 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 ChecknFly is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/282:30 pmLHR - IAD
1 stop24h 16mLufthansa
Wed 1/810:20 pmIAD - LHR
1 stop17h 15mLufthansa
Deal found 12/20$616
This ChecknFly deal was found by Cheapflights users on 12/20. 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 ChecknFly is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/2712:25 pmLHR - IAD
Nonstop8h 40mKLM
Wed 1/226:45 pmIAD - LHR
Nonstop7h 30mKLM
Deal found 12/20$667
This Delta deal was found by Cheapflights users on 12/20. 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.
Sun 12/296:30 amLHR - IAD
1 stop14h 15mDelta
Sun 1/267:37 pmIAD - LHR
1 stop19h 33mDelta
Deal found 12/20$669
This TravelUp deal was found by Cheapflights users on 12/20. 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 TravelUp is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/2712:25 pmLHR - IAD
Nonstop8h 40mAir France
Wed 1/229:20 pmIAD - LHR
Nonstop7h 10mAir France
Deal found 12/20$677
This American Airlines deal was found by Cheapflights users on 12/20. 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 12/274:30 pmLHR - IAD
Nonstop8h 15mAmerican Airlines
Wed 1/226:22 amIAD - LHR
2 stops18h 33mAmerican Airlines
Deal found 12/20$682
This United Airlines deal was found by Cheapflights users on 12/20. 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.
Sun 12/292:30 pmLHR - IAD
1 stop24h 16mUnited Airlines
Sat 2/86:25 pmIAD - LHR
Nonstop7h 15mUnited Airlines
Deal found 12/20$707
This Virgin Atlantic deal was found by Cheapflights users on 12/20. 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.
Fri 12/2712:25 pmLHR - IAD
Nonstop8h 40mVirgin Atlantic
Wed 1/226:45 pmIAD - LHR
Nonstop7h 30mVirgin Atlantic
Deal found 12/20$710
This Air Canada deal was found by Cheapflights users on 12/20. 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 Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/273:00 pmLHR - IAD
1 stop29h 13mMultiple Airlines
Wed 1/223:55 pmIAD - LHR
2 stops13h 10mMultiple Airlines
Deal found 12/20$734
This Austrian Airlines deal was found by Cheapflights users on 12/20. 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 Austrian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/286:00 amLHR - IAD
1 stop13h 35mAustrian Airlines
Sat 2/85:25 pmIAD - LHR
2 stops46h 10mAustrian Airlines
Deal found 12/20$741
This Brussels Airlines deal was found by Cheapflights users on 12/20. 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 Brussels Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/2811:35 amLHR - IAD
1 stop30h 53mBrussels Airlines
Wed 1/84:00 pmIAD - LHR
1 stop36h 40mBrussels Airlines
Deal found 12/20$774
This Gotogate deal was found by Cheapflights users on 12/20. 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.
Wed 12/258:15 amLHR - IAD
1 stop17h 45mTAP AIR PORTUGAL
Mon 5/510:25 pmIAD - LHR
1 stop33h 20mTAP AIR PORTUGAL
Deal found 12/20$777
This Voliamo deal was found by Cheapflights users on 12/20. 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 Voliamo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/2510:40 amLGW - IAD
1 stop15h 20mTAP AIR PORTUGAL
Thu 1/95:30 pmIAD - LGW
1 stop11h 20mTAP AIR PORTUGAL
Deal found 12/20$797

Find flights from London to Dulles Intl within your budget

Customize your flight search to find flights from London 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 20, 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Sat 1/18

12:05 pm-3:40 pm

Nonstop8h 35m

Washington, D.C. Dulles Intl

Sat 1/18

6:00 pm-7:25 am

1 stop32h 25m

$558

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Thu 1/16

7:10 pm-3:45 pm

2 stops25h 35m

Washington, D.C. Dulles Intl

Thu 1/23

6:30 pm-9:40 pm

2 stops22h 10m

$565

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Tue 1/14

12:10 pm-3:35 pm

Nonstop8h 25m

Washington, D.C. Dulles Intl

Mon 1/27

1:53 pm-10:15 am

2 stops15h 22m

$568

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Mon 3/17

7:40 am-4:30 pm

1 stop12h 50m

Washington, D.C. Dulles Intl

Thu 3/27

7:25 pm-6:40 am

Nonstop7h 15m

$576

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Tue 1/14

11:55 am-6:25 pm

1 stop11h 30m

Washington, D.C. Dulles Intl

Mon 1/27

7:40 pm-10:55 am

1 stop10h 15m

$576

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Tue 4/29

7:25 am-3:00 pm

1 stop12h 35m

Washington, D.C. Dulles Intl

Tue 5/6

5:15 pm-11:45 am

1 stop13h 30m

$578

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Sun 2/16

2:05 pm-3:45 pm

1 stop30h 40m

Washington, D.C. Dulles Intl

Mon 3/17

7:45 pm-7:15 am

Nonstop7h 30m

$582

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Mon 2/3

7:00 am-6:25 pm

2 stops16h 25m

Washington, D.C. Dulles Intl

Mon 2/10

7:40 pm-6:50 pm

2 stops18h 10m

$585

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Tue 1/14

6:30 am-9:21 pm

2 stops19h 51m

Washington, D.C. Dulles Intl

Mon 1/27

5:45 pm-8:25 am

1 stop9h 40m

$592

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Thu 1/16

9:50 am-3:40 pm

1 stop10h 50m

Washington, D.C. Dulles Intl

Tue 1/21

5:10 pm-10:20 am

1 stop12h 10m

$593

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/20

Showing 1-10 of 60 results
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Compare providers for flights from London to Dulles Intl

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from London to Dulles Intl in December.
ProviderPrice AccuracyTrust Score*
eDreamsPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*2 stars
MytripPrice Accuracy3 starsTrust Score*3 stars
FlightnetworkPrice Accuracy2 starsTrust Score*3 stars
CheapflightsfaresPrice Accuracy3 starsTrust Score*1 star
CheapflightsfaresPrice Accuracy2 starsTrust Score*1 star
CombigoPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on London-Washington, D.C. Dulles Intl Airport flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on London-Washington, D.C. Dulles Intl Airport flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from London-Washington, D.C. Dulles Intl Airport flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on London-Washington, D.C. Dulles Intl Airport flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for London-Washington, D.C. Dulles Intl Airport flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from London to Dulles Intl

Have a flexible travel schedule? Discover the best time to fly to Dulles Intl from London 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 London to Dulles Intl

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

How far ahead should I book a flight from London to Washington, D.C. Dulles Intl Airport?

Use this chart to determine the optimal time to book a round-trip flight from London to Dulles Intl. Price data was last updated on December 20, 2024.

The price you pay for your flight from London to Washington, D.C. Dulles Intl Airport may vary depending on when you book. For the best chance of a lower fare, look to book 85 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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

Currently, August is the cheapest month in which you can book a flight from London to Washington, D.C. Dulles Intl Airport (average of $309). Flying from London 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 LON to IAD?

Find hourly flight availability from London 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 20, 2024.

When flying from London to Washington, D.C. Dulles Intl Airport, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 21% versus a flight in the afternoon.

What is the cheapest day to fly from London to Washington, D.C. Dulles Intl Airport?

Use this chart to determine the cheapest time to fly round-trip from London to Dulles Intl. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their London to Washington, D.C. Dulles Intl Airport flight should consider departing on Saturday mornings when fares are most often at their lowest. Friday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

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

Explore weekly flight availability from London 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 20, 2024.

The most flights from LON to IAD are scheduled on a Thursday (27 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (22 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 20, 2024.
To help decide which airline to fly from London to Washington, D.C., see what other customers have to say about Lufthansa, KLM and United Airlines. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
8.0
Very good
8,601 reviews

Crew

8.6

Overall

8.0

Comfort

8.0

Food

7.3

Entertainment

7.9

Boarding

8.2

Reviews

1 / 10

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

8.0
Very good
8,601 reviews
8.0
Very good
8,601 reviews

Crew

8.6

Overall

8.0

Comfort

8.0

Food

7.3

Entertainment

7.9

Boarding

8.2

Reviews

1 / 10

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

7.8
Good
1,349 reviews
8.0
Very good
8,601 reviews

Crew

8.6

Overall

8.0

Comfort

8.0

Food

7.3

Entertainment

7.9

Boarding

8.2

Reviews

1 / 10

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

7.7
Good
1,285 reviews
8.0
Very good
8,601 reviews

Crew

8.6

Overall

8.0

Comfort

8.0

Food

7.3

Entertainment

7.9

Boarding

8.2

Reviews

1 / 10

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

7.6
Good
1,603 reviews
8.0
Very good
8,601 reviews

Crew

8.6

Overall

8.0

Comfort

8.0

Food

7.3

Entertainment

7.9

Boarding

8.2

Reviews

1 / 10

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

7.6
Good
785 reviews
8.0
Very good
8,601 reviews

Crew

8.6

Overall

8.0

Comfort

8.0

Food

7.3

Entertainment

7.9

Boarding

8.2

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 London 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 flying from London to Washington, D.C. Dulles Intl Airport round-trip?

    Austrian Airlines, at $558, was found to be the cheapest airline from London to Washington, D.C. Dulles Intl Airport.Alternate airlines to your destination round-trip include Finnair and Lufthansa. Austrian Airlines is 28% cheaper than the average price of flights available within the next 90 days to this destination.

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

    One-way options have recently been found by users for as low as $470 on Icelandair. Other airlines that offer cheap prices include Aer Lingus from $519 and Virgin Atlantic from $544 one-way.

  • What are the most popular routes from London to Washington, D.C. Dulles Intl Airport?

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

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from London to Washington, D.C. Dulles Intl Airport on time: Air Canada (89%), Austrian Airlines (89%), Copa Airlines (89%).

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

    Looking at all options, your cheapest flight can be booked for $706. While the most popular route (London Heathrow - Washington, D.C. Dulles Intl) can be booked for $568 on average our data indicates $1,601 when flying from London to Washington, D.C. Dulles Intl Airport.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from London 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 London to Washington, D.C. Dulles Intl Airport?

    Currently, August is the cheapest month in which you can book a flight from London to Washington, D.C. Dulles Intl Airport (average of $309). Flying from London 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

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Top 10 airlines flying from London to Dulles Intl

Discover the top 10 airlines that operate flights from London 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 20, 2024.
AirlineCheapestAverageFlexibilityOn-time
PLAYCheapest$348Average$489FlexibilityNo cancel feeOn-timeN/A
DeltaCheapest$444Average$936FlexibilityNo cancel feeOn-timeN/A
Aer LingusCheapest$511Average$815FlexibilityNo cancel feeOn-timeN/A
Scandinavian AirlinesCheapest$527Average$743FlexibilityNo cancel feeOn-time77%
IcelandairCheapest$529Average$841FlexibilityNo cancel feeOn-time76%
IberiaCheapest$586Average$954FlexibilityNo cancel feeOn-time77%
Virgin AtlanticCheapest$599Average$973FlexibilityNo cancel feeOn-time72%
Austrian AirlinesCheapest$608Average$858FlexibilityNo cancel feeOn-time78%
American AirlinesCheapest$619Average$728FlexibilityNo cancel feeOn-time71%
British AirwaysCheapest$621Average$897FlexibilityNo cancel feeOn-time70%
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