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Dulles Intl

$572+ 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 1/25. Fares are subject to change and may not be available on all flights or dates of travel.
LON — IAD
Jan 27 — Feb 31
Tue 1/27
Tue 2/3
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 November, booked 80 days in advance, depart on a Thursday or Wednesday and return on a Wednesday

Cheap 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 28, 2025.

This Kiwi.com deal was found by Cheapflights users on 12/26. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/3110:25 amLHR - IAD
1 stop34h 59mAustrian Airlines
Sat 1/1010:15 pmIAD - LHR
Nonstop7h 35mAustrian Airlines
Deal found 12/26$902
This Cheapflightsfares deal was found by Cheapflights users on 12/26. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/296:00 amLHR - IAD
1 stop14h 15mTAP AIR PORTUGAL
Fri 1/210:30 pmIAD - LHR
1 stop19h 10mTAP AIR PORTUGAL
Deal found 12/26$930
This Mytrip deal was found by Cheapflights users on 12/27. 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.
Mon 12/296:45 pmSTN - IAD
2 stops26h 20mMultiple Airlines
Wed 1/76:50 pmIAD - STN
2 stops21h 15mMultiple Airlines
Deal found 12/27$930
This Booking.com deal was found by Cheapflights users on 12/26. 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 12/267:55 pmLHR - IAD
1 stop24h 20mTAP AIR PORTUGAL
Fri 1/910:30 pmIAD - LHR
1 stop14h 00mTAP AIR PORTUGAL
Deal found 12/26$936
This Kiwi.com deal was found by Cheapflights users on 12/26. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/277:20 amSTN - IAD
1 stop16h 25mRoyal Air Maroc
Sat 1/108:45 pmIAD - STN
1 stop28h 35mRoyal Air Maroc
Deal found 12/26$950
This Mytrip deal was found by Cheapflights users on 12/27. 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.
Mon 12/295:55 pmLGW - IAD
2 stops27h 10mMultiple Airlines
Wed 1/76:50 pmIAD - LGW
2 stops20h 05mMultiple Airlines
Deal found 12/27$959
This Trip.com deal was found by Cheapflights users on 12/26. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/277:20 amSTN - IAD
1 stop16h 25mMultiple Airlines
Wed 1/77:40 pmIAD - STN
2 stops19h 55mMultiple Airlines
Deal found 12/26$959
This Kiwi.com deal was found by Cheapflights users on 12/26. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/277:20 amSTN - IAD
1 stop16h 25mMultiple Airlines
Fri 1/97:40 pmIAD - STN
2 stops14h 35mMultiple Airlines
Deal found 12/26$962
This Gotogate deal was found by Cheapflights users on 12/26. 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.
Fri 12/267:55 pmLHR - IAD
1 stop24h 20mTAP AIR PORTUGAL
Thu 1/15:30 pmIAD - LHR
1 stop14h 10mTAP AIR PORTUGAL
Deal found 12/26$964
This Gotogate deal was found by Cheapflights users on 12/27. 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 12/307:50 amLHR - IAD
1 stop12h 45mAer Lingus
Thu 1/225:05 pmIAD - LHR
1 stop13h 20mAer Lingus
Deal found 12/27$974
This Orbitz deal was found by Cheapflights users on 12/27. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/308:50 amLHR - IAD
1 stop11h 45mAer Lingus
Sun 1/185:05 pmIAD - LHR
1 stop12h 05mAer Lingus
Deal found 12/27$977
This Kiwi.com deal was found by Cheapflights users on 12/27. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/292:00 pmLGW - IAD
1 stop36h 03mMultiple Airlines
Mon 1/261:31 pmIAD - LGW
1 stop15h 29mMultiple Airlines
Deal found 12/27$977

Find 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 28, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$602
(Air Canada)

One-way from

$572
(The Travel House)

Popular in

July

Cheapest in

September

Average price

$851

Good round-trip deal

$750 or less

Good one-way deal

$755 or less
Provider with most accurate pricing for London (LON)-Washington, D.C. Dulles Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for London (LON)-Washington, D.C. Dulles Intl flights.
Search Deals
From London (LON) to Washington, D.C. Dulles Intl
Search Deals
One-way flight from London (LON) to Washington, D.C. Dulles Intl
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($107 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($16 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals
Price to beat on a round-trip flight from London (LON) to Washington, D.C. Dulles Intl.
Search Deals
Price to beat on a one-way flight from London (LON) to Washington, D.C. Dulles Intl.
Search Deals

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 December 28, 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.

LTN - IAD

LTNIAD

London Luton

Fri 1/16

5:50 am-3:35 pm

1 stop14h 45m

Washington, D.C. Dulles Intl

Mon 1/19

5:05 pm-8:35 am

1 stop10h 30m

$604

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Tue 6/23

4:40 pm-8:00 pm

Nonstop8h 20m

Washington, D.C. Dulles Intl

Tue 8/4

6:00 am-8:40 pm

1 stop9h 40m

$608

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Fri 5/22

12:15 pm-3:30 pm

Nonstop8h 15m

Washington, D.C. Dulles Intl

Sun 5/31

10:15 pm-10:40 am

Nonstop7h 25m

$608

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Wed 6/24

4:40 pm-8:00 pm

Nonstop8h 20m

Washington, D.C. Dulles Intl

Thu 8/6

6:00 am-9:35 pm

1 stop10h 35m

$608

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Sun 5/24

4:40 pm-8:00 pm

Nonstop8h 20m

Washington, D.C. Dulles Intl

Sun 5/31

6:30 pm-6:55 am

Nonstop7h 25m

$608

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Wed 6/24

4:40 pm-8:00 pm

Nonstop8h 20m

Washington, D.C. Dulles Intl

Sun 8/2

6:30 pm-6:55 am

Nonstop7h 25m

$608

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Thu 6/25

4:40 pm-8:00 pm

Nonstop8h 20m

Washington, D.C. Dulles Intl

Sun 8/2

10:15 pm-10:40 am

Nonstop7h 25m

$608

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Wed 6/24

4:40 pm-8:00 pm

Nonstop8h 20m

Washington, D.C. Dulles Intl

Wed 8/5

6:00 am-8:40 pm

1 stop9h 40m

$608

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Thu 1/22

9:00 am-4:40 pm

1 stop12h 40m

Washington, D.C. Dulles Intl

Fri 1/30

6:10 pm-1:00 pm

2 stops13h 50m

$623

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Wed 1/21

11:55 am-6:30 pm

1 stop11h 35m

Washington, D.C. Dulles Intl

Wed 2/18

7:40 pm-10:55 am

1 stop10h 15m

$625

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/26

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*1 star
AranGrantPrice Accuracy2 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 eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on London-Washington, D.C. Dulles Intl Airport flight deals on Cheapflights vs. eDreams >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 eDreams the most. eDreams 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 December 26, 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 $449). Flying from London to Washington, D.C. Dulles Intl Airport in July is currently the most expensive (average of $696). 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 28, 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 13% 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 December 28, 2025.

The most flights from LON to IAD are scheduled on a Friday (26 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (17 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 17% of weekly flights between London and Washington, D.C. have experienced delays in the past year, with the average delay time being 131 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 8% of flights being delayed.

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

AI-powered summary based on content written by travel experts. AI can make mistakes.
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 December 28, 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
884 reviews

Crew

8.1

Food

6.8

Comfort

7.3

Entertainment

6.8

Boarding

7.6

Overall

7.6

Reviews

1 / 20
2.0
Mediocre

Nate,Dec 2025

IAD - GSP

Again, I missed this flight because of the first leg of my journey being delayed by three hours. I hope the people on the flight had a nice flight.
Austrian Airlines
7.6
Good
884 reviews
Austrian Airlines
7.6
Good
884 reviews

Crew

8.1

Food

6.8

Comfort

7.3

Entertainment

6.8

Boarding

7.6

Overall

7.6

Reviews

1 / 20
2.0
Mediocre

Nate,Dec 2025

IAD - GSP

Again, I missed this flight because of the first leg of my journey being delayed by three hours. I hope the people on the flight had a nice flight.
Virgin Atlantic
7.5
Good
677 reviews
Austrian Airlines
7.6
Good
884 reviews

Crew

8.1

Food

6.8

Comfort

7.3

Entertainment

6.8

Boarding

7.6

Overall

7.6

Reviews

1 / 20
2.0
Mediocre

Nate,Dec 2025

IAD - GSP

Again, I missed this flight because of the first leg of my journey being delayed by three hours. I hope the people on the flight had a nice flight.
United Airlines
7.4
Good
9,113 reviews
Austrian Airlines
7.6
Good
884 reviews

Crew

8.1

Food

6.8

Comfort

7.3

Entertainment

6.8

Boarding

7.6

Overall

7.6

Reviews

1 / 20
2.0
Mediocre

Nate,Dec 2025

IAD - GSP

Again, I missed this flight because of the first leg of my journey being delayed by three hours. I hope the people on the flight had a nice flight.
American Airlines
7.2
Good
11,072 reviews
Austrian Airlines
7.6
Good
884 reviews

Crew

8.1

Food

6.8

Comfort

7.3

Entertainment

6.8

Boarding

7.6

Overall

7.6

Reviews

1 / 20
2.0
Mediocre

Nate,Dec 2025

IAD - GSP

Again, I missed this flight because of the first leg of my journey being delayed by three hours. I hope the people on the flight had a nice flight.
British Airways
6.7
Okay
7,616 reviews
Austrian Airlines
7.6
Good
884 reviews

Crew

8.1

Food

6.8

Comfort

7.3

Entertainment

6.8

Boarding

7.6

Overall

7.6

Reviews

1 / 20
2.0
Mediocre

Nate,Dec 2025

IAD - GSP

Again, I missed this flight because of the first leg of my journey being delayed by three hours. I hope the people on the flight had a nice 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 United Airlines, Austrian Airlines, and Icelandair fly from London to Washington, D.C. Dulles Intl Airport in about 8h 15m. The time it takes to get you to your destination can typically vary by up to 3h 20m. 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?

    Scandinavian Airlines, at $271, was found to be the cheapest airline from London to Washington, D.C. Dulles Intl Airport.Alternate airlines to your destination round-trip include Delta and Austrian Airlines. Scandinavian Airlines is 64% 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 $453 on TAP AIR PORTUGAL. Other airlines that offer cheap prices include Icelandair from $480 and Aer Lingus from $481 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 (92%), Air France (87%), Delta (87%).

  • 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 $576. While the most popular route (London Heathrow - Washington, D.C. Dulles Intl) can be booked for $441 on average, our data indicates $1,754 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 $449). Flying from London to Washington, D.C. Dulles Intl Airport in July is currently the most expensive (average of $696). 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
Woodbridge
Tysons
Arlington
Owings Mills
Springfield
Hanover
Silver Spring
Fredericksburg
Linthicum Heights
Rockville
Laurel
Towson
Manassas
National Harbor
Bowie
Largo
McLean
Clinton
Cordova

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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 December 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$320Average$925FlexibilityNo cancel feeOn-timeN/A
Austrian AirlinesCheapest$431Average$984FlexibilityNo cancel feeOn-time78%
TAP AIR PORTUGALCheapest$473Average$730FlexibilityNo cancel feeOn-timeN/A
IcelandairCheapest$510Average$720FlexibilityNo cancel feeOn-time76%
American AirlinesCheapest$559Average$711FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$567Average$805FlexibilityNo cancel feeOn-time69%
Scandinavian AirlinesCheapest$572Average$833FlexibilityNo cancel feeOn-time77%
British AirwaysCheapest$584Average$780FlexibilityNo cancel feeOn-time70%
LufthansaCheapest$590Average$859FlexibilityNo cancel feeOn-time76%
Air CanadaCheapest$635Average$663FlexibilityNo cancel feeOn-time67%

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