Dulles Intl

$433+ 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 3/17. Fares are subject to change and may not be available on all flights or dates of travel.
LON — IAD
nov. 25 — dic. 21
We work with more than 300 partners to bring you better travel deals

Find cheap flights from London to Dulles Intl with Cheapflights

1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”
2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.
3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

The best prices from London to Washington, D.C. Dulles Intl are usually found in January or April, booked 75 days in advance, depart on a Thursday or Tuesday 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 noviembre 20, 2024.

Most accurate provider

AranGrant
3 stars

Most trusted provider

AranGrant
3 stars

Popular in

June

Cheapest in

January

Round-trip from

$537
(FlightHub)

One-way from

$433
(Mytrip)
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.
High demand for flights, 18% potential price rise
Best time to find cheap flights, 14% potential price drop
From London (LON) to Washington, D.C. Dulles Intl
One-way flight from London (LON) to Washington, D.C. Dulles Intl

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 noviembre 20, 2024.

This PLAY deal was found by Cheapflights users on 11/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure PLAY is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 11/246:00 amLTN - IAD
1 stop16h 00mMultiple Airlines
lun. 12/26:10 pmIAD - LTN
1 stop14h 45mMultiple Airlines
Deal found 11/18$541
This Mytrip deal was found by Cheapflights users on 11/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/45:50 pmLGW - IAD
2 stops26h 10mMultiple Airlines
lun. 12/97:15 pmIAD - LGW
2 stops18h 30mMultiple Airlines
Deal found 11/19$541
This PLAY deal was found by Cheapflights users on 11/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure PLAY is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 11/2611:00 amSTN - IAD
1 stop11h 00mPLAY
dom. 12/16:10 pmIAD - STN
1 stop10h 50mPLAY
Deal found 11/19$541
This Mytrip deal was found by Cheapflights users on 11/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/48:50 pmLHR - IAD
2 stops23h 10mMultiple Airlines
lun. 12/97:15 pmIAD - LHR
2 stops19h 50mMultiple Airlines
Deal found 11/18$565
This Gotogate deal was found by Cheapflights users on 11/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 11/268:40 pmLHR - IAD
1 stop26h 45mIcelandair
mar. 12/107:40 pmIAD - LHR
1 stop18h 50mIcelandair
Deal found 11/20$640
This Voliamo deal was found by Cheapflights users on 11/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Voliamo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 12/86:30 pmLHR - IAD
1 stop23h 30mTAP AIR PORTUGAL
lun. 12/97:15 pmIAD - LHR
1 stop17h 15mTAP AIR PORTUGAL
Deal found 11/19$642
This Gotogate deal was found by Cheapflights users on 11/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/411:55 amLGW - IAD
1 stop11h 30mIcelandair
lun. 12/97:40 pmIAD - LGW
1 stop10h 15mIcelandair
Deal found 11/19$649
This Austrian Airlines deal was found by Cheapflights users on 11/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Austrian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 12/51:35 pmLHR - IAD
1 stop31h 38mAustrian Airlines
sáb. 12/74:10 pmIAD - LHR
1 stop34h 15mAustrian Airlines
Deal found 11/20$651
This Gotogate deal was found by Cheapflights users on 11/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 12/57:50 amLHR - IAD
1 stop12h 50mAer Lingus
lun. 12/98:45 pmIAD - LHR
1 stop9h 40mAer Lingus
Deal found 11/19$663
This Kiwi.com deal was found by Cheapflights users on 11/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/46:30 amSTN - IAD
1 stop14h 10mMultiple Airlines
lun. 12/95:10 pmIAD - STN
1 stop11h 40mMultiple Airlines
Deal found 11/19$670
This Gotogate deal was found by Cheapflights users on 11/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 11/287:30 pmLHR - IAD
1 stop25h 10mScandinavian Airlines
sáb. 2/15:10 pmIAD - LHR
1 stop11h 10mScandinavian Airlines
Deal found 11/19$673
This The Travel House deal was found by Cheapflights users on 11/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure The Travel House is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 11/224:20 pmLHR - IAD
Nonstop8h 55mLufthansa
sáb. 11/305:56 pmIAD - LHR
1 stop32h 14mLufthansa
Deal found 11/19$677

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

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

jue. 1/30

3:55 pm-9:00 pm

1 stop34h 05m

Washington, D.C. Dulles Intl

sáb. 2/1

5:30 pm-9:50 am

1 stop11h 20m

$537

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

sáb. 1/18

6:00 pm-9:46 am

1 stop20h 46m

Washington, D.C. Dulles Intl

lun. 1/20

6:05 am-8:35 pm

1 stop9h 30m

$540

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

mié. 12/4

5:50 pm-3:00 pm

2 stops26h 10m

Washington, D.C. Dulles Intl

lun. 12/9

7:15 pm-6:45 pm

2 stops18h 30m

$541

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

mar. 11/26

11:00 am-5:00 pm

1 stop11h 00m

Washington, D.C. Dulles Intl

dom. 12/1

6:10 pm-10:00 am

1 stop10h 50m

$541

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

lun. 2/17

6:30 pm-2:30 pm

1 stop25h 00m

Washington, D.C. Dulles Intl

sáb. 2/22

5:30 pm-3:30 pm

1 stop17h 00m

$545

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

lun. 1/13

11:55 am-6:25 pm

1 stop11h 30m

Washington, D.C. Dulles Intl

mar. 1/21

7:40 pm-10:55 am

1 stop10h 15m

$547

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

lun. 3/10

7:35 am-6:00 pm

1 stop14h 25m

Washington, D.C. Dulles Intl

vie. 3/14

7:10 pm-3:05 pm

1 stop15h 55m

$558

LondonWashington, D.C.

LTN - IAD

LTNIAD

London Luton

lun. 3/24

7:35 am-6:00 pm

1 stop14h 25m

Washington, D.C. Dulles Intl

dom. 3/30

6:50 pm-5:00 pm

2 stops17h 10m

$586

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

mar. 3/25

12:15 pm-7:25 pm

1 stop11h 10m

Washington, D.C. Dulles Intl

sáb. 3/29

8:30 pm-10:55 am

1 stop10h 25m

$592

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

jue. 1/9

8:15 am-3:40 pm

1 stop12h 25m

Washington, D.C. Dulles Intl

sáb. 1/18

5:10 pm-7:50 am

1 stop9h 40m

$601

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/18

Showing 1-10 of 49 results
1
2
3
...
5

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
AranGrantPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
CheapflightsfaresPrice Accuracy3 starsTrust Score*1 star
FlightnetworkPrice Accuracy3 starsTrust Score*3 stars
PricelinePrice Accuracy1 starTrust Score*3 stars
Kiwi.comPrice 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 AranGrant to be most consistent on Cheapflights vs. AranGrant Users can find the same prices on London-Washington, D.C. Dulles Intl Airport flight deals on Cheapflights vs. AranGrant >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 AranGrant the most. AranGrant 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 November 15, 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 75 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, September is the cheapest month in which you can book a flight from London to Washington, D.C. Dulles Intl Airport (average of $300). Flying from London to Washington, D.C. Dulles Intl Airport in June is currently the most expensive (average of $376). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from 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 noviembre 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 18% 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 November 18, 2024.

Travelers seeking maximum savings on their London to Washington, D.C. Dulles Intl Airport flight should consider departing on Tuesday 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 noviembre 20, 2024.

The most flights from LON to IAD are scheduled on a Monday (26 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (21 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 noviembre 20, 2024.
To help decide which airline to fly from London to Washington, D.C., see what other customers have to say about TAP AIR PORTUGAL, Finnair and SWISS. 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
8,756 reviews

Entertainment

7.9

Food

7.3

Overall

8.0

Comfort

7.9

Crew

8.5

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
8,756 reviews
8.0
Very good
8,756 reviews

Entertainment

7.9

Food

7.3

Overall

8.0

Comfort

7.9

Crew

8.5

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
1,350 reviews
8.0
Very good
8,756 reviews

Entertainment

7.9

Food

7.3

Overall

8.0

Comfort

7.9

Crew

8.5

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
1,300 reviews
8.0
Very good
8,756 reviews

Entertainment

7.9

Food

7.3

Overall

8.0

Comfort

7.9

Crew

8.5

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
805 reviews
8.0
Very good
8,756 reviews

Entertainment

7.9

Food

7.3

Overall

8.0

Comfort

7.9

Crew

8.5

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
1,637 reviews
8.0
Very good
8,756 reviews

Entertainment

7.9

Food

7.3

Overall

8.0

Comfort

7.9

Crew

8.5

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?

    TAP AIR PORTUGAL, at $537, was found to be the cheapest airline from London to Washington, D.C. Dulles Intl Airport.Alternate airlines to your destination round-trip include Lufthansa and PLAY. TAP AIR PORTUGAL is 29% 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 $439 on PLAY. Other airlines that offer cheap prices include Icelandair from $461 and TAP AIR PORTUGAL from $536 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 (82%), Austrian Airlines (82%), Copa Airlines (82%).

  • 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 $672. While the most popular route (London Heathrow - Washington, D.C. Dulles Intl) can be booked for $465 on average our data indicates $1,450 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, September is the cheapest month in which you can book a flight from London to Washington, D.C. Dulles Intl Airport (average of $300). Flying from London to Washington, D.C. Dulles Intl Airport in June is currently the most expensive (average of $376). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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 2,629,791 searches. Data last updated noviembre 20, 2024.
AirlineCheapestAverageFlexibilityOn-time
PLAYCheapest$352Average$493FlexibilityNo cancel feeOn-timeN/A
Scandinavian AirlinesCheapest$525Average$682FlexibilityNo cancel feeOn-time77%
IcelandairCheapest$529Average$838FlexibilityNo cancel feeOn-time76%
Aer LingusCheapest$538Average$808FlexibilityNo cancel feeOn-timeN/A
Virgin AtlanticCheapest$562Average$864FlexibilityNo cancel feeOn-time72%
IberiaCheapest$583Average$784FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$590Average$875FlexibilityNo cancel feeOn-time69%
British AirwaysCheapest$592Average$887FlexibilityNo cancel feeOn-time70%
TAP AIR PORTUGALCheapest$598Average$814FlexibilityNo cancel feeOn-timeN/A
Austrian AirlinesCheapest$608Average$858FlexibilityNo cancel feeOn-time78%
100% Free
Cheapflights is completely free to use, so you can start saving the moment you arrive.
Book with Flexibility
Our users can plan ahead with confidence and find flights with no change fees
Travel Smart
Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.