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$237+ Cheap flights from Dulles Intl (IAD) to London (LON)

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 1/15. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — LON
dic. 23 — dic. 301
lun. 12/23
lun. 12/30
1 adult, Economy
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The best prices from Washington, D.C. Dulles Intl to London are usually found in January or October, booked 85 days in advance, depart on a Wednesday or Monday and return on a Thursday

Cheap flight deals from Dulles Intl to London

Discover tips and strategies to find the most affordable flight options for your journey from Dulles Intl (IAD) to London (LON). 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 diciembre 18, 2024.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$536
(Mytrip)

One-way from

$238
(Mytrip)

Popular in

June

Cheapest in

January

Average price

$855
Provider with most accurate pricing for Washington, D.C. Dulles Intl-London (LON) flight deals.
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Provider most trusted by Cheapflights users for Washington, D.C. Dulles Intl-London (LON) flights.
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From Washington, D.C. Dulles Intl to London (LON)
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One-way flight from Washington, D.C. Dulles Intl to London (LON)
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High demand for flights, 18% potential price rise
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Best time to find cheap flights, 3% potential price drop
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Average for round-trip flights in December 2024
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Find flight deals from Dulles Intl to London

Cheapest flights from Dulles Intl to London
Explore the most affordable flight options available from Dulles Intl to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on diciembre 18, 2024.

This oojo deal was found by Cheapflights users on 12/18. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 12/307:40 pmIAD - LGW
1 stop10h 15mIcelandair
lun. 1/1311:55 amLGW - IAD
1 stop11h 30mIcelandair
Deal found 12/18$593
This Delta deal was found by Cheapflights users on 12/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 12/316:25 pmIAD - LHR
Nonstop7h 30mDelta
mar. 1/218:40 amLHR - IAD
1 stop12h 05mDelta
Deal found 12/17$639
This Kiwi.com deal was found by Cheapflights users on 12/17. 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. 12/305:50 pmIAD - LHR
1 stop13h 55mLufthansa
mar. 1/218:30 amLHR - IAD
1 stop12h 20mLufthansa
Deal found 12/17$641
This Kiwi.com deal was found by Cheapflights users on 12/17. 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. 12/305:50 pmIAD - LHR
1 stop13h 55mMultiple Airlines
lun. 1/207:25 pmLHR - IAD
1 stop24h 10mMultiple Airlines
Deal found 12/17$655
This Expedia deal was found by Cheapflights users on 12/17. 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.
dom. 12/297:40 pmIAD - LHR
1 stop10h 10mIcelandair
mié. 1/2212:15 pmLHR - IAD
1 stop11h 10mIcelandair
Deal found 12/17$658
This Kiwi.com deal was found by Cheapflights users on 12/17. 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.
dom. 12/296:00 pmIAD - LHR
1 stop33h 20mAustrian Airlines
vie. 1/246:00 amLHR - IAD
1 stop13h 35mAustrian Airlines
Deal found 12/17$669
This Scandinavian Airlines deal was found by Cheapflights users on 12/18. 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 Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 12/305:10 pmIAD - LHR
1 stop11h 10mScandinavian Airlines
dom. 1/127:30 pmLHR - IAD
1 stop25h 10mScandinavian Airlines
Deal found 12/18$684
This Delta deal was found by Cheapflights users on 12/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 12/315:35 pmIAD - LCY
1 stop10h 55mDelta
mar. 1/2110:00 amLCY - IAD
1 stop10h 45mDelta
Deal found 12/17$692
This United Airlines deal was found by Cheapflights users on 12/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 12/315:37 pmIAD - LHR
1 stop9h 48mUnited Airlines
mié. 1/84:20 pmLHR - IAD
Nonstop8h 55mUnited Airlines
Deal found 12/17$699
This SWISS deal was found by Cheapflights users on 12/17. 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 SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 12/318:45 pmIAD - LHR
1 stop17h 30mSWISS
dom. 1/196:00 amLHR - IAD
1 stop15h 35mSWISS
Deal found 12/17$702
This Cheapflightsfares deal was found by Cheapflights users on 12/16. 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.
lun. 12/306:00 pmIAD - LHR
Nonstop7h 15mIberia
dom. 2/1612:10 pmLHR - IAD
Nonstop8h 25mIberia
Deal found 12/16$762
This Cheapflightsfares deal was found by Cheapflights users on 12/17. 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.
lun. 12/306:00 pmIAD - LHR
Nonstop7h 15mBritish Airways
jue. 1/304:30 pmLHR - IAD
Nonstop8h 15mBritish Airways
Deal found 12/17$770

Find flights from Dulles Intl to London within your budget

Customize your flight search to find flights from Dulles Intl to London 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 diciembre 18, 2024.

Fly from

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Fly to

Any airport

Route

Depart

Return

Price

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

lun. 1/20

7:15 pm-7:45 pm

2 stops19h 30m

London Gatwick

lun. 1/27

8:35 am-2:30 pm

2 stops34h 55m

$536

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

mié. 2/19

10:30 pm-3:30 pm

1 stop12h 00m

London Heathrow

lun. 2/24

6:30 pm-2:30 pm

1 stop25h 00m

$536

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

mié. 2/19

7:40 pm-10:55 am

1 stop10h 15m

London Gatwick

lun. 2/24

11:55 am-6:25 pm

1 stop11h 30m

$537

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

mar. 4/29

8:30 pm-11:55 am

1 stop10h 25m

London Heathrow

mié. 5/7

1:05 pm-7:15 pm

1 stop11h 10m

$537

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

dom. 3/9

6:10 pm-5:40 pm

1 stop19h 30m

London Heathrow

dom. 3/16

7:30 pm-4:40 pm

1 stop25h 10m

$538

Washington, D.C.London

IAD - STN

IADSTN

Washington, D.C. Dulles Intl

lun. 2/3

5:10 pm-7:55 pm

2 stops21h 45m

London Stansted

dom. 2/9

3:50 pm-3:40 pm

2 stops28h 50m

$538

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

mié. 2/5

10:30 pm-3:05 pm

1 stop11h 35m

London Gatwick

mié. 2/12

4:35 pm-3:00 pm

1 stop27h 25m

$545

Washington, D.C.London

IAD - LTN

IADLTN

Washington, D.C. Dulles Intl

mar. 1/21

7:40 pm-10:00 pm

2 stops21h 20m

London Luton

mar. 1/28

7:10 am-6:25 pm

2 stops16h 15m

$586

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

dom. 1/12

6:25 pm-6:55 am

Nonstop7h 30m

London Heathrow

mar. 1/21

8:40 am-3:45 pm

1 stop12h 05m

$605

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

dom. 1/12

6:25 pm-6:55 am

Nonstop7h 30m

London Heathrow

mar. 1/21

11:45 am-3:45 pm

1 stop33h 00m

$633

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/18

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

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 Dulles Intl to London in December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*2 stars
CheapflightsfaresPrice Accuracy3 starsTrust Score*1 star
FlightnetworkPrice Accuracy2 starsTrust Score*3 stars
MytripPrice Accuracy3 starsTrust Score*3 stars
Kiwi.comPrice Accuracy3 starsTrust Score*3 stars
GurufarePrice Accuracy3 starsTrust Score*3 stars
FlightnetworkPrice Accuracy-Trust 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 Washington, D.C. Dulles Intl Airport-London flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Washington, D.C. Dulles Intl Airport-London flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Washington, D.C. Dulles Intl Airport-London flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Washington, D.C. Dulles Intl Airport-London 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 Washington, D.C. Dulles Intl Airport-London 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 Dulles Intl to London

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

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

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

Use this chart to determine the optimal time to book a round-trip flight from Dulles Intl to London. Price data was last updated on December 13, 2024.

To ensure you get the cheapest price possible for a flight from Washington, D.C. Dulles Intl Airport to London, you should look to book at least 85 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

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

Currently, November is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to London (average of $661). Flying from Washington, D.C. Dulles Intl Airport to London in June is currently the most expensive (average of $1,135). 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 IAD to LON?

Find hourly flight availability from Dulles Intl to London. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated diciembre 18, 2024.

When flying from Washington, D.C. Dulles Intl Airport to London, 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 19% versus a flight at noon.

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

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

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

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

Explore weekly flight availability from Dulles Intl to London. 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 diciembre 18, 2024.

The most flights from IAD to LON are scheduled on a Wednesday (27 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (23 on average).

Rainfall in London by month

Plan your trip to London by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in London ranges from 1.6 - 2.8 inches per month. January is typically the wettest month, when rainfall can reach 2.8 in. July is typically the driest time to visit London when rainfall is around 1.6 in.

Temperature in London by month

Plan your trip to London by taking into account the average temperature totals by month.

If weather is an important factor for your trip to London, 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 62.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 39.2 F).

Reviews of airlines servicing London

Get insights into the airlines that provide service to London. 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 London. Reviews last updated diciembre 18, 2024.
See what other customers who have flown with KLM, Virgin Atlantic and Delta from Washington, D.C. to London have to say. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
8,604 reviews

Food

7.3

Crew

8.6

Overall

8.0

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Delta
8.0
Very good
8,604 reviews
Delta
8.0
Very good
8,604 reviews

Food

7.3

Crew

8.6

Overall

8.0

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

KLM
7.8
Good
1,349 reviews
Delta
8.0
Very good
8,604 reviews

Food

7.3

Crew

8.6

Overall

8.0

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Finnair
7.7
Good
1,285 reviews
Delta
8.0
Very good
8,604 reviews

Food

7.3

Crew

8.6

Overall

8.0

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Austrian Airlines
7.6
Good
787 reviews
Delta
8.0
Very good
8,604 reviews

Food

7.3

Crew

8.6

Overall

8.0

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

SWISS
7.6
Good
1,606 reviews
Delta
8.0
Very good
8,604 reviews

Food

7.3

Crew

8.6

Overall

8.0

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Related info for your journey

Find useful and relevant information for your journey from Dulles Intl to London. 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 Washington, D.C. Dulles Intl Airport to London round-trip?

    According to our current data, TAP AIR PORTUGAL ($536), Icelandair ($537), and Scandinavian Airlines ($538) offers the cheapest pricing from Washington, D.C. Dulles Intl Airport to London. TAP AIR PORTUGAL is priced at 28% lower than the current average price of a flight leaving 3 months from now.

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

    The cheapest airline one-way is Icelandair, with whom users have recently found tickets for as low as $238. However, be on the lookout for offers from TAP AIR PORTUGAL and Scandinavian Airlines, as they are both options that can get you from Washington, D.C. Dulles Intl Airport to London for a low price.

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

    When deciding which route to take from Washington, D.C. Dulles Intl Airport to London consider Washington, D.C. Dulles Intl - London Heathrow, Washington, D.C. Dulles Intl - London Gatwick or Washington, D.C. Dulles Intl - London City as they are the most popular.

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

    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 Washington, D.C. Dulles Intl Airport to London on time: Virgin Atlantic (86%), Singapore Airlines (86%), Air France (84%).

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

    While on average a flight from Washington, D.C. Dulles Intl Airport to London is generally $1,621, our data shows the cheapest flight currently is $393. When looking at the most popular route, (Washington, D.C. Dulles Intl - London Heathrow), you can expect to pay $459 for that flight.

  • Where are the most common layover locations when flying from Washington, D.C. Dulles Intl Airport to London?

    Of the flights from Washington, D.C. Dulles Intl Airport to London that have layovers, most of them stop in Reykjavik.

  • What are some popular things to do or see while on a layover in Reykjavik?

    Reykjavik travelers tend to visit Hallgrímskirkja, Harpa, and Laugardalslaug Geothermal Pool more than anywhere else. Hallgrímskirkja, Harpa and Laugardalslaug Geothermal Pool are located about 23.2 mi, 23.3 mi, and 24.6 mi, respectively from Reykjavik Keflavik Intl if you are interested in checking them out. Those landing in Reykjavik looking to spend some time exploring during their layover can rent a car for about $50 per day.

  • Where are the least popular layover locations for Washington, D.C. Dulles Intl Airport to London flights?

    The least popular layover on flights from Washington, D.C. Dulles Intl Airport to London is Dublin.

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

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

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

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

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

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

    Currently, November is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to London (average of $661). Flying from Washington, D.C. Dulles Intl Airport to London in June is currently the most expensive (average of $1,135). 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.

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Alternative routes for Dulles Intl to London

See prices for flight routes from nearby airports that may be better suited for you.
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Top 10 airlines flying from Dulles Intl to London

Discover the top 10 airlines that operate flights from Dulles Intl to London. 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 diciembre 18, 2024.
AirlineCheapestAverageFlexibilityOn-time
PLAYCheapest$366Average$482FlexibilityNo cancel feeOn-timeN/A
Scandinavian AirlinesCheapest$370Average$603FlexibilityNo cancel feeOn-time77%
TAP AIR PORTUGALCheapest$398Average$646FlexibilityNo cancel feeOn-timeN/A
Aer LingusCheapest$459Average$645FlexibilityNo cancel feeOn-timeN/A
IcelandairCheapest$480Average$681FlexibilityNo cancel feeOn-time76%
KLMCheapest$546Average$771FlexibilityNo cancel feeOn-time75%
FinnairCheapest$551Average$703FlexibilityNo cancel feeOn-time76%
SWISSCheapest$572Average$785FlexibilityNo cancel feeOn-time79%
IberiaCheapest$581Average$742FlexibilityNo cancel feeOn-time77%
DeltaCheapest$586Average$849FlexibilityNo cancel feeOn-timeN/A
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