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Dulles Intl

$486+ 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 1/19. Fares are subject to change and may not be available on all flights or dates of travel.
LON — IAD
nov. 22 — nov. 291
sáb. 11/22
sáb. 11/29
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 70 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 octubre 23, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$535
(Gotogate)

One-way from

$486
(Mytrip)

Popular in

July

Cheapest in

September

Average price

$727

Good round-trip deal

$680 or less

Good one-way deal

$626 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 ($99 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 October 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 octubre 23, 2025.

This Gotogate deal was found by Cheapflights users on 10/21. 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.
lun. 11/246:00 amLHR - IAD
1 stop14h 15mTAP AIR PORTUGAL
mar. 12/25:30 pmIAD - LHR
1 stop23h 05mTAP AIR PORTUGAL
Deal found 10/21$535
This Kiwi.com deal was found by Cheapflights users on 10/21. 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.
lun. 11/242:00 pmLGW - IAD
1 stop22h 45mMultiple Airlines
dom. 12/79:20 pmIAD - LGW
1 stop31h 40mMultiple Airlines
Deal found 10/21$535
This TravelUp deal was found by Cheapflights users on 10/21. 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.
jue. 12/46:00 amLHR - IAD
1 stop14h 15mTAP AIR PORTUGAL
dom. 12/710:30 pmIAD - LHR
1 stop14h 00mTAP AIR PORTUGAL
Deal found 10/21$536
This Kiwi.com deal was found by Cheapflights users on 10/21. 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.
vie. 11/212:00 pmLGW - IAD
1 stop22h 45mMultiple Airlines
sáb. 12/65:30 pmIAD - LGW
2 stops34h 05mMultiple Airlines
Deal found 10/21$536
This oojo deal was found by Cheapflights users on 10/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 12/46:00 amLHR - IAD
1 stop14h 15mTAP AIR PORTUGAL
mar. 12/95:30 pmIAD - LHR
1 stop24h 10mTAP AIR PORTUGAL
Deal found 10/23$539
This Mytrip deal was found by Cheapflights users on 10/23. 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.
sáb. 11/81:25 pmLGW - IAD
1 stop11h 05mMultiple Airlines
mié. 11/129:00 pmIAD - LGW
1 stop16h 55mMultiple Airlines
Deal found 10/23$545
This Mytrip deal was found by Cheapflights users on 10/23. 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.
vie. 11/76:30 amSTN - IAD
1 stop14h 05mMultiple Airlines
mar. 11/119:00 pmIAD - STN
1 stop12h 20mMultiple Airlines
Deal found 10/23$548
This Mytrip deal was found by Cheapflights users on 10/22. 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.
mar. 12/29:20 pmSTN - IAD
2 stops28h 40mMultiple Airlines
lun. 12/85:30 pmIAD - STN
2 stops18h 25mMultiple Airlines
Deal found 10/22$549
This Mytrip deal was found by Cheapflights users on 10/22. 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.
lun. 12/156:00 amLTN - IAD
1 stop18h 30mMultiple Airlines
mar. 12/309:00 pmIAD - LTN
1 stop18h 05mMultiple Airlines
Deal found 10/22$553
This FlightHub deal was found by Cheapflights users on 10/21. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 12/44:00 pmLGW - IAD
1 stop34h 00mTAP AIR PORTUGAL
lun. 12/85:30 pmIAD - LGW
1 stop17h 15mTAP AIR PORTUGAL
Deal found 10/21$554
This Kiwi.com deal was found by Cheapflights users on 10/22. 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.
vie. 11/72:00 pmLGW - IAD
1 stop34h 51mMultiple Airlines
mar. 11/118:40 amIAD - LGW
2 stops40h 20mMultiple Airlines
Deal found 10/22$556
This Mytrip deal was found by Cheapflights users on 10/22. 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.
lun. 12/158:30 amSTN - IAD
1 stop12h 05mMultiple Airlines
mar. 12/309:00 pmIAD - STN
1 stop18h 35mMultiple Airlines
Deal found 10/22$556

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 octubre 23, 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.

LGW - IAD

LGWIAD

London Gatwick

jue. 2/12

4:00 pm-9:00 pm

1 stop34h 00m

Washington, D.C. Dulles Intl

dom. 2/15

10:30 pm-9:50 am

1 stop30h 20m

$561

LondonWashington, D.C.

LTN - IAD

LTNIAD

London Luton

dom. 12/7

8:05 am-3:35 pm

1 stop12h 30m

Washington, D.C. Dulles Intl

dom. 12/14

9:00 pm-11:45 am

1 stop9h 45m

$575

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

vie. 12/12

6:30 am-3:35 pm

1 stop14h 05m

Washington, D.C. Dulles Intl

dom. 12/14

9:00 pm-2:50 pm

1 stop12h 50m

$577

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

lun. 3/9

4:35 pm-3:35 pm

1 stop27h 00m

Washington, D.C. Dulles Intl

mar. 3/17

6:30 pm-3:45 pm

1 stop17h 15m

$579

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

vie. 12/5

6:30 am-3:35 pm

1 stop14h 05m

Washington, D.C. Dulles Intl

vie. 12/12

5:05 pm-2:50 pm

1 stop16h 45m

$585

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

vie. 1/2

6:30 am-3:35 pm

1 stop14h 05m

Washington, D.C. Dulles Intl

lun. 1/5

5:05 pm-9:50 am

1 stop11h 45m

$599

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

jue. 1/15

8:05 pm-4:35 pm

2 stops25h 30m

Washington, D.C. Dulles Intl

jue. 1/22

6:50 pm-12:05 am

2 stops24h 15m

$600

LondonWashington, D.C.

LTN - IAD

LTNIAD

London Luton

vie. 1/23

5:50 am-3:35 pm

1 stop14h 45m

Washington, D.C. Dulles Intl

vie. 1/30

5:05 pm-8:55 am

1 stop10h 50m

$612

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

dom. 11/23

11:55 am-6:30 pm

1 stop11h 35m

Washington, D.C. Dulles Intl

mar. 12/2

7:40 pm-10:55 am

1 stop10h 15m

$620

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

vie. 1/16

10:45 am-9:00 pm

2 stops15h 15m

Washington, D.C. Dulles Intl

mar. 1/20

5:30 pm-9:50 am

1 stop11h 20m

$622

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/22

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 October.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
MytripPrice Accuracy2 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*3 stars
CheapflightsfaresPrice Accuracy3 starsTrust Score*1 star

*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.

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 October 17, 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 70 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 $452). Flying from London to Washington, D.C. Dulles Intl Airport in July is currently the most expensive (average of $719). 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 octubre 23, 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.

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.

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 octubre 23, 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
863 reviews

Entertainment

6.8

Boarding

7.6

Crew

8.1

Food

6.8

Comfort

7.3

Overall

7.6

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
863 reviews
Austrian Airlines
7.6
Good
863 reviews

Entertainment

6.8

Boarding

7.6

Crew

8.1

Food

6.8

Comfort

7.3

Overall

7.6

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
670 reviews
Austrian Airlines
7.6
Good
863 reviews

Entertainment

6.8

Boarding

7.6

Crew

8.1

Food

6.8

Comfort

7.3

Overall

7.6

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
8,995 reviews
Austrian Airlines
7.6
Good
863 reviews

Entertainment

6.8

Boarding

7.6

Crew

8.1

Food

6.8

Comfort

7.3

Overall

7.6

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
11,033 reviews
Austrian Airlines
7.6
Good
863 reviews

Entertainment

6.8

Boarding

7.6

Crew

8.1

Food

6.8

Comfort

7.3

Overall

7.6

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
7,468 reviews
Austrian Airlines
7.6
Good
863 reviews

Entertainment

6.8

Boarding

7.6

Crew

8.1

Food

6.8

Comfort

7.3

Overall

7.6

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, Icelandair, and Scandinavian Airlines fly from London to Washington, D.C. Dulles Intl Airport in about 11h 35m. The time it takes to get you to your destination can typically vary by up to 22h 25m. The distance from London to Washington, D.C. Dulles Intl Airport is about 3683 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 $536 on SWISS. Other airlines that offer cheap prices include British Airways from $538 and Lufthansa 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 (89%), Air France (89%), Delta (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 $559. While the most popular route (London Heathrow - Washington, D.C. Dulles Intl) can be booked for $530 on average, our data indicates $1,565 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 $452). Flying from London to Washington, D.C. Dulles Intl Airport in July is currently the most expensive (average of $719). 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
Springfield
Silver Spring
Hanover
Gaithersburg
Fredericksburg
Fairfax
Linthicum Heights
Falls Church
Owings Mills
Manassas
Largo
Oxon Hill
Laurel
Towson
National Harbor
Waldorf

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Alternative routes for London to Dulles Intl

See prices for flight routes from nearby airports that may be better suited for you.
Heathrow to Dulles Intl flights
Heathrow to Baltimore flights
Heathrow to Reagan-National flights
Gatwick to Dulles Intl flights
Gatwick to Baltimore flights
London City to Dulles Intl flights
Stansted to Dulles Intl flights
Luton to Dulles Intl flights
Gatwick to Reagan-National flights
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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 octubre 23, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$320Average$952FlexibilityNo cancel feeOn-timeN/A
Scandinavian AirlinesCheapest$390Average$833FlexibilityNo cancel feeOn-time77%
Austrian AirlinesCheapest$431Average$858FlexibilityNo cancel feeOn-time78%
TAP AIR PORTUGALCheapest$473Average$714FlexibilityNo cancel feeOn-timeN/A
IcelandairCheapest$490Average$671FlexibilityNo cancel feeOn-time76%
American AirlinesCheapest$562Average$692FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$567Average$826FlexibilityNo cancel feeOn-time69%
British AirwaysCheapest$594Average$831FlexibilityNo cancel feeOn-time70%
Air CanadaCheapest$635Average$663FlexibilityNo cancel feeOn-time67%
LufthansaCheapest$649Average$873FlexibilityNo cancel feeOn-time76%

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