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Dulles Intl

$542+ 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 12/8. Fares are subject to change and may not be available on all flights or dates of travel.
LON — IAD
Dec 26 — Jan 21
Fri 12/26
Fri 1/2
1 adult, Economy
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Cheapflights Tip: The best prices from London to Washington, D.C. Dulles Intl are usually found in September or March, booked 80 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 November 26, 2025.

Most accurate provider

Mytrip
3 stars

Most trusted provider

Mytrip
3 stars

Round-trip from

$611
(oojo)

One-way from

$542
(Kiwi.com)

Popular in

July

Cheapest in

September

Average price

$729

Good round-trip deal

$709 or less

Good one-way deal

$737 or less
Provider with most accurate pricing for London (LON)-Washington, D.C. Dulles Intl flight deals.
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Provider most trusted by Cheapflights users for London (LON)-Washington, D.C. Dulles Intl flights.
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From London (LON) to Washington, D.C. Dulles Intl
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One-way flight from London (LON) to Washington, D.C. Dulles Intl
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Highest demand for flights based on searches. 11% potential increase in price ($96 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($15 potential savings vs. average RT price).
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Average for round-trip flights in November 2025
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Price to beat on a round-trip flight from London (LON) to Washington, D.C. Dulles Intl.
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Price to beat on a one-way flight from London (LON) to Washington, D.C. Dulles Intl.
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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 November 26, 2025.

This American Airlines deal was found by Cheapflights users on 11/25. 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.
Thu 12/252:45 pmLHR - IAD
1 stop27h 42mAmerican Airlines
Thu 1/151:08 pmIAD - LHR
1 stop15h 07mAmerican Airlines
Deal found 11/25$614
This CheapOair deal was found by Cheapflights users on 11/25. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/127:50 amLHR - IAD
1 stop12h 45mAer Lingus
Tue 12/169:00 pmIAD - LHR
1 stop11h 25mAer Lingus
Deal found 11/25$615
This Priceline deal was found by Cheapflights users on 11/25. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/108:50 amLHR - IAD
1 stop11h 45mAer Lingus
Sun 12/285:05 pmIAD - LHR
1 stop11h 00mAer Lingus
Deal found 11/25$617
This British Airways deal was found by Cheapflights users on 11/24. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/47:50 amLHR - IAD
1 stop12h 45mBritish Airways
Wed 12/105:29 pmIAD - LHR
1 stop13h 31mBritish Airways
Deal found 11/24$621
This ChecknFly deal was found by Cheapflights users on 11/24. 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 12/55:00 pmLHR - IAD
2 stops25h 20mFinnair
Thu 12/118:05 pmIAD - LHR
1 stop10h 55mFinnair
Deal found 11/24$622
This Expedia deal was found by Cheapflights users on 11/25. 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.
Thu 12/2512:10 pmLHR - IAD
Nonstop8h 25mBritish Airways
Thu 1/85:05 pmIAD - LHR
1 stop10h 00mBritish Airways
Deal found 11/25$623
This Netflights deal was found by Cheapflights users on 11/24. 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 Netflights is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/47:50 amLHR - IAD
1 stop12h 45mBritish Airways
Sun 12/149:00 pmIAD - LHR
1 stop11h 25mBritish Airways
Deal found 11/24$624
This British Airways deal was found by Cheapflights users on 11/25. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/1512:10 pmLHR - IAD
Nonstop8h 25mBritish Airways
Thu 3/1210:00 pmIAD - LHR
1 stop14h 50mBritish Airways
Deal found 11/25$625
This Scandinavian Airlines deal was found by Cheapflights users on 11/25. 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 Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/256:40 amLHR - IAD
1 stop15h 35mScandinavian Airlines
Wed 2/118:30 pmIAD - LHR
1 stop16h 10mScandinavian Airlines
Deal found 11/25$626
This British Airways deal was found by Cheapflights users on 11/25. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/264:20 pmLHR - IAD
1 stop28h 15mBritish Airways
Mon 2/164:40 pmIAD - LHR
1 stop11h 35mBritish Airways
Deal found 11/25$627
This Mytrip deal was found by Cheapflights users on 11/25. 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.
Fri 12/56:30 amSTN - IAD
2 stops17h 00mMultiple Airlines
Tue 12/97:40 pmIAD - STN
2 stops20h 40mMultiple Airlines
Deal found 11/25$627
This Mytrip deal was found by Cheapflights users on 11/24. 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 12/32:40 pmLTN - IAD
2 stops29h 35mMultiple Airlines
Tue 12/95:30 pmIAD - LTN
2 stops21h 50mMultiple Airlines
Deal found 11/24$628

Cheapflights Fare Finder

 
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 November 26, 2025.
Use the filters below to find and compare flights from London to Washington, D.C. Dulles Intl Airport that are best for you.

Fly from

London

Fly to

Dulles Intl

Route

Depart

Return

Price

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Wed 1/14

5:55 am-9:00 pm

2 stops20h 05m

Washington, D.C. Dulles Intl

Thu 1/15

5:30 pm-5:50 pm

2 stops19h 20m

$619

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Mon 3/9

11:00 am-3:35 pm

2 stops32h 35m

Washington, D.C. Dulles Intl

Tue 3/17

6:30 pm-9:50 am

1 stop11h 20m

$623

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Tue 2/3

8:50 am-3:35 pm

1 stop11h 45m

Washington, D.C. Dulles Intl

Sun 2/8

6:20 pm-6:30 am

Nonstop7h 10m

$624

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Thu 2/5

8:15 am-3:35 pm

1 stop12h 20m

Washington, D.C. Dulles Intl

Tue 2/10

6:20 pm-6:30 am

Nonstop7h 10m

$624

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Thu 2/5

8:15 am-3:35 pm

1 stop12h 20m

Washington, D.C. Dulles Intl

Mon 2/9

9:45 pm-10:00 am

Nonstop7h 15m

$624

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Wed 4/15

6:40 am-4:50 pm

2 stops15h 10m

Washington, D.C. Dulles Intl

Wed 4/29

8:20 pm-6:50 pm

2 stops17h 30m

$627

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Tue 4/21

7:50 pm-4:50 pm

2 stops26h 00m

Washington, D.C. Dulles Intl

Sun 5/17

8:20 pm-5:00 pm

2 stops15h 40m

$628

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Thu 2/12

4:25 pm-7:55 pm

Nonstop8h 30m

Washington, D.C. Dulles Intl

Mon 2/16

6:20 pm-6:30 am

Nonstop7h 10m

$632

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Mon 1/19

4:25 pm-7:55 pm

Nonstop8h 30m

Washington, D.C. Dulles Intl

Fri 2/6

9:45 pm-10:00 am

Nonstop7h 15m

$632

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Thu 1/8

4:25 pm-7:55 pm

Nonstop8h 30m

Washington, D.C. Dulles Intl

Wed 1/14

6:20 pm-6:30 am

Nonstop7h 10m

$633

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/24

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 November.
ProviderPrice AccuracyTrust Score*
eDreamsPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
MytripPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*3 stars
CheapflightsfaresPrice Accuracy3 starsTrust Score*2 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 Mytrip to be most consistent on Cheapflights vs. Mytrip Users can find the same prices on London-Washington, D.C. Dulles Intl Airport flight deals on Cheapflights vs. Mytrip >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 Mytrip the most. Mytrip 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.

Cheapflights Insights

Everything you need to know about your flight from London to Washington, D.C. Dulles Intl Airport

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 November 21, 2025.

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 80 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, February is the cheapest month in which you can book a flight from London to Washington, D.C. Dulles Intl Airport (average of $456). Flying from London to Washington, D.C. Dulles Intl Airport in July is currently the most expensive (average of $716). 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 November 26, 2025.

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 morning, which can drop the price by up to 12% versus a flight at noon.

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 November 26, 2025.

The most flights from LON to IAD are scheduled on a Monday (29 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (25 on average).

How much does it cost to fly round-trip from London to Washington, D.C. Dulles Intl Airport?

What’s the top layover airport for flights from London to Washington, D.C. Dulles Intl Airport?

Share of 1-stop round-trip flights from London to Washington, D.C. Dulles Intl Airport chosen by Cheapflights users in the past 12 months, using the same layover each way.

Dublin (DUB) – chosen by Cheapflights users on 38% of 1-stop itineraries from London to Washington, D.C. Dulles Intl Airport on Cheapflights.

What’s the cheapest layover airport for flights from London to Washington, D.C. Dulles Intl Airport?

Average round-trip fare for 1-stop flights from London to Washington, D.C. Dulles Intl Airport, chosen by Cheapflights users in the past 12 months, with the same layover each way.

Lisbon (LIS) is the most affordable 1-stop option, with an average round-trip price of $546.

What’s the fastest layover option from London to Washington, D.C. Dulles Intl Airport?

Shortest average travel time for 1-stop one-way flights from London to Washington, D.C. Dulles Intl Airport, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.

Flights via Dublin (DUB) have the shortest average one-way travel time for 1-stop routes: 11h 00m.

Which airport typically offers the quickest layover for flights from London to Washington, D.C. Dulles Intl Airport?

Average layover duration for 1-stop one-way flights from London to Washington, D.C. Dulles Intl Airport, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Flights via Reykjavik (KEF) offer the fastest connection on this route, with an average layover time of 1h 21m.

How often are flights from London to Washington, D.C. delayed?

About 18% of weekly flights between London and Washington, D.C. have experienced delays in the past year, with the average delay time being 132 minutes.

What is the most punctual flight time for London to Washington, D.C. flights?

Historically, flights departing in the evening are less likely to be delayed, whereas flights leaving in the morning tend to experience delays more often.

What day of the week experiences the fewest flight delays on this route?

Monday tends to have the lowest number of delays on this route, whereas Thursday has historically faced a higher average of delays compared to other days of the week.

Which airline has the best punctuality record on London to Washington, D.C. flights?

Over the last year, Virgin Atlantic have had the lowest number of delays on this route, with just 10% of flights being delayed.

The best insider tips for London to Washington, D.C. Dulles Intl Airport flights

Snippets provided in this section are AI-generated based on a summarization of Cheapflights-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
Cheapflights partnered with top experts to bring you the best recommendations for your London to Washington, D.C. Dulles Intl Airport trip
Airlines
British Airways

BA's Club Suite offers private pods with a door, ideal for long-haul comfort.


Heathrow's Terminal 5 simplifies BA connections, avoiding bus transfers.

Read more about British Airwaysby Gabriel Leigh
United Airlines

United's Polaris Class offers lie-flat seats and Saks Fifth Avenue bedding.


Access Polaris Lounges at IAD for exclusive dining and relaxation.

Read more about United Airlinesby Harriet Baskas
Airports
LHR

Expect long security lines at Heathrow. Ensure all liquids are in one bag to avoid delays during manual screenings.

Read more about LHRby Ramsey Qubein
IAD

The Washington Metro Silver Line now reaches IAD, offering a cheap 40-minute ride to the city.

Read more about IADby Ramsey Qubein
Our travel experts
Gabriel Leigh

Gabriel Leigh

Expert on British Airways

Gabriel Leigh

Gabriel Leigh

Gabriel is a writer and video creator. As senior content producer for Flightradar24 and Monocle’s transport correspondent, he keeps a close eye on aviation in particular. He has also written travel articles for the likes of The New York Times. Born in New York but raised around the world, he now lives in Sweden. He’s been to 75 countries, flying 2.3 million miles on 113 airlines and through 234 airports in the process.

Read more
Harriet Baskas

Harriet Baskas

Expert on United Airlines

Harriet Baskas

Harriet Baskas

Harriet is an award-winning journalist who is happiest in an airport or an unusual museum. Her stories about airports, air travel, and the business of travel have appeared on NBC News, CNBC, USA TODAY, The Points Guy and other outlets. She is the creator of the StuckatTheAirport.com blog and the author of nine books. When not out on the road or exploring the latest airport amenities, she’s home in Seattle getting ready for the next adventure.

Read more
Ramsey Qubein

Ramsey Qubein

Expert on LHR and IAD

Ramsey Qubein

Ramsey Qubein

An avid traveler and aviation expert who has visited 173 countries, all 50 states and seven continents, Ramsey Qubein flies nearly 400,000 miles a year. As a North Carolina-based freelance journalist for publications including Conde Nast Traveler, Forbes, USA Today and Bloomberg among others, he explores the latest trends in aviation, hospitality, cruises and business.

Read more

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 26, 2025.
Read reviews from past customers who have flown Austrian Airlines, Virgin Atlantic, and United Airlines from London to Washington, D.C. Dulles Intl Airport. 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.
Austrian Airlines
7.6
Good
874 reviews

Comfort

7.3

Food

6.8

Overall

7.6

Boarding

7.6

Crew

8.1

Entertainment

6.8

Reviews

1 / 20
10.0
Excellent

Andrew,Sep 2025

FLR - VIE

Staff was really nice, they provided water as a beverage. Otherwise you had to purchase beverages or food. A complementary chocolate was provided at the end of the flight.
Austrian Airlines
7.6
Good
874 reviews
Austrian Airlines
7.6
Good
874 reviews

Comfort

7.3

Food

6.8

Overall

7.6

Boarding

7.6

Crew

8.1

Entertainment

6.8

Reviews

1 / 20
10.0
Excellent

Andrew,Sep 2025

FLR - VIE

Staff was really nice, they provided water as a beverage. Otherwise you had to purchase beverages or food. A complementary chocolate was provided at the end of the flight.
Virgin Atlantic
7.5
Good
675 reviews
Austrian Airlines
7.6
Good
874 reviews

Comfort

7.3

Food

6.8

Overall

7.6

Boarding

7.6

Crew

8.1

Entertainment

6.8

Reviews

1 / 20
10.0
Excellent

Andrew,Sep 2025

FLR - VIE

Staff was really nice, they provided water as a beverage. Otherwise you had to purchase beverages or food. A complementary chocolate was provided at the end of the flight.
United Airlines
7.4
Good
9,046 reviews
Austrian Airlines
7.6
Good
874 reviews

Comfort

7.3

Food

6.8

Overall

7.6

Boarding

7.6

Crew

8.1

Entertainment

6.8

Reviews

1 / 20
10.0
Excellent

Andrew,Sep 2025

FLR - VIE

Staff was really nice, they provided water as a beverage. Otherwise you had to purchase beverages or food. A complementary chocolate was provided at the end of the flight.
American Airlines
7.2
Good
11,038 reviews
Austrian Airlines
7.6
Good
874 reviews

Comfort

7.3

Food

6.8

Overall

7.6

Boarding

7.6

Crew

8.1

Entertainment

6.8

Reviews

1 / 20
10.0
Excellent

Andrew,Sep 2025

FLR - VIE

Staff was really nice, they provided water as a beverage. Otherwise you had to purchase beverages or food. A complementary chocolate was provided at the end of the flight.
British Airways
6.7
Okay
7,539 reviews
Austrian Airlines
7.6
Good
874 reviews

Comfort

7.3

Food

6.8

Overall

7.6

Boarding

7.6

Crew

8.1

Entertainment

6.8

Reviews

1 / 20
10.0
Excellent

Andrew,Sep 2025

FLR - VIE

Staff was really nice, they provided water as a beverage. Otherwise you had to purchase beverages or food. A complementary chocolate was provided at the end of the flight.

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.

  • How long is the flight from London to Washington, D.C. Dulles Intl Airport?

    Airlines like TAP AIR PORTUGAL, British Airways, and Scandinavian Airlines fly from London to Washington, D.C. Dulles Intl Airport in about 11h 45m. The time it takes to get you to your destination can typically vary by up to 20h 50m. The distance from London to Washington, D.C. Dulles Intl Airport is about 3664 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines flying from London to Washington, D.C. Dulles Intl Airport round-trip?

    Delta, at $320, was found to be the cheapest airline from London to Washington, D.C. Dulles Intl Airport.Alternate airlines to your destination round-trip include Scandinavian Airlines and Austrian Airlines. Delta is 58% 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 $552 on SWISS. Other airlines that offer cheap prices include British Airways from $566 and Aer Lingus from $572 one-way.

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

    While some choose either London Gatwick - Washington, D.C. Dulles Intl or London City - Washington, D.C. Dulles Intl, London Heathrow - Washington, D.C. Dulles Intl is the most popular route 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: KLM (95%), Air France (93%), Delta (93%).

  • 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 $568. While the most popular route (London Heathrow - Washington, D.C. Dulles Intl) can be booked for $529 on average, our data indicates $1,834 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, February is the cheapest month in which you can book a flight from London to Washington, D.C. Dulles Intl Airport (average of $456). Flying from London to Washington, D.C. Dulles Intl Airport in July is currently the most expensive (average of $716). 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 Washington, D.C. Dulles Intl Airport?

Book flights to Washington, D.C. Dulles Intl Airport if you plan to visit one of these locations
Alexandria
Tysons
Woodbridge
Arlington
Owings Mills
Springfield
Hanover
Silver Spring
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Alternative routes for London to Dulles Intl

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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 November 26, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$320Average$926FlexibilityNo cancel feeOn-timeN/A
Scandinavian AirlinesCheapest$390Average$833FlexibilityNo cancel feeOn-time77%
Austrian AirlinesCheapest$431Average$984FlexibilityNo cancel feeOn-time78%
TAP AIR PORTUGALCheapest$473Average$714FlexibilityNo cancel feeOn-timeN/A
IcelandairCheapest$510Average$720FlexibilityNo cancel feeOn-time76%
American AirlinesCheapest$562Average$711FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$567Average$813FlexibilityNo cancel feeOn-time69%
British AirwaysCheapest$592Average$792FlexibilityNo cancel feeOn-time70%
Air CanadaCheapest$635Average$663FlexibilityNo cancel feeOn-time67%
LufthansaCheapest$649Average$864FlexibilityNo cancel feeOn-time76%

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