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$217+ Cheap flights from Dulles Intl (IAD) to Heathrow (LHR)

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 2/10. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — LHR
dic 1 — dic 81
dom 12/1
dom 12/8
1 adult, Economy
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The best prices from Washington, D.C. Dulles Intl to London Heathrow are usually found in September or October, booked 89 days in advance, depart on a Wednesday or Monday and return on a Thursday

Cheap flight deals from Dulles Intl to Heathrow

Discover tips and strategies to find the most affordable flight options for your journey from Dulles Intl (IAD) to Heathrow (LHR). 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 novembre 26, 2024.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Popular in

June

Cheapest in

September

Round-trip from

$547
(Kiwi.com)

One-way from

$217
(FlightHub)
Provider with most accurate pricing for Washington, D.C. Dulles Intl-London Heathrow flight deals.
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Provider most trusted by Cheapflights users for Washington, D.C. Dulles Intl-London Heathrow flights.
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High demand for flights, 29% potential price rise
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Best time to find cheap flights, 14% potential price drop
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From Washington, D.C. Dulles Intl to London Heathrow
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One-way flight from Washington, D.C. Dulles Intl to London Heathrow
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Find flight deals from Dulles Intl to Heathrow

Cheapest flights from Dulles Intl to Heathrow
Explore the most affordable flight options available from Dulles Intl to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on novembre 26, 2024.

This Gotogate deal was found by Cheapflights users on 11/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun 12/27:40 pmIAD - LHR
1 stop18h 50mIcelandair
mar 12/108:40 pmLHR - IAD
1 stop26h 45mIcelandair
Deal found 11/25$554
This oojo deal was found by Cheapflights users on 11/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun 12/25:10 pmIAD - LHR
1 stop20h 20mScandinavian Airlines
mar 12/107:30 pmLHR - IAD
1 stop25h 10mScandinavian Airlines
Deal found 11/25$556
This lol.travel deal was found by Cheapflights users on 11/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun 12/96:45 pmIAD - LHR
Nonstop7h 30mVirgin Atlantic
mer 12/1812:25 pmLHR - IAD
Nonstop8h 40mVirgin Atlantic
Deal found 11/25$594
This Mytrip deal was found by Cheapflights users on 11/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun 12/93:55 pmIAD - LHR
1 stop10h 15mMultiple Airlines
lun 12/168:05 pmLHR - IAD
1 stop25h 20mMultiple Airlines
Deal found 11/25$602
This United Airlines deal was found by Cheapflights users on 11/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun 12/96:25 pmIAD - LHR
Nonstop7h 15mUnited Airlines
lun 12/1612:05 pmLHR - IAD
1 stop33h 20mUnited Airlines
Deal found 11/25$611
This Delta deal was found by Cheapflights users on 11/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun 12/91:35 pmIAD - LHR
1 stop12h 15mDelta
mer 12/182:30 pmLHR - IAD
1 stop14h 26mDelta
Deal found 11/25$627
This Expedia deal was found by Cheapflights users on 11/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mer 12/1110:35 amIAD - LHR
1 stop14h 55mAir Canada
mer 12/183:00 pmLHR - IAD
2 stops30h 26mAir Canada
Deal found 11/25$638
This KAYAK deal was found by Cheapflights users on 11/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mer 12/116:25 pmIAD - LHR
Nonstop7h 15mSWISS
lun 12/166:40 pmLHR - IAD
1 stop26h 45mSWISS
Deal found 11/24$650
This oojo deal was found by Cheapflights users on 11/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ven 11/2910:30 pmIAD - LHR
1 stop18h 05mTAP AIR PORTUGAL
lun 12/96:30 pmLHR - IAD
1 stop25h 00mTAP AIR PORTUGAL
Deal found 11/25$682
This British Airways deal was found by Cheapflights users on 11/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar 12/109:55 pmIAD - LHR
Nonstop7h 10mBritish Airways
ven 12/274:30 pmLHR - IAD
Nonstop8h 15mBritish Airways
Deal found 11/25$683

Find flights from Dulles Intl to Heathrow within your budget

Customize your flight search to find flights from Dulles Intl to Heathrow 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 2,683,152 searches. Data last updated novembre 26, 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

dom 2/23

10:30 pm-5:30 pm

1 stop14h 00m

London Heathrow

dom 3/9

12:25 pm-10:00 pm

1 stop13h 35m

$547

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

dom 1/12

5:10 pm-4:25 pm

2 stops18h 15m

London Heathrow

mer 1/22

6:40 am-3:40 pm

1 stop14h 00m

$548

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

mer 4/30

8:30 pm-8:20 pm

1 stop18h 50m

London Heathrow

dom 5/4

9:25 pm-7:15 pm

1 stop26h 50m

$550

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

lun 12/9

6:45 pm-7:15 am

Nonstop7h 30m

London Heathrow

mer 12/18

12:25 pm-4:05 pm

Nonstop8h 40m

$594

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

lun 12/9

3:55 pm-7:10 am

1 stop10h 15m

London Heathrow

lun 12/16

8:05 pm-4:25 pm

1 stop25h 20m

$602

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

lun 12/9

6:25 pm-6:40 am

Nonstop7h 15m

London Heathrow

lun 12/16

12:05 pm-4:25 pm

1 stop33h 20m

$611

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

lun 1/13

9:55 pm-10:05 am

Nonstop7h 10m

London Heathrow

mer 1/22

4:30 pm-7:45 pm

Nonstop8h 15m

$613

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

mer 4/23

5:50 pm-6:05 am

Nonstop7h 15m

London Heathrow

mar 4/29

5:25 pm-8:30 pm

Nonstop8h 05m

$617

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

mar 1/21

12:49 pm-7:10 am

2 stops13h 21m

London Heathrow

mer 1/29

6:50 am-3:13 pm

2 stops13h 23m

$629

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

mar 3/4

9:55 pm-10:05 am

Nonstop7h 10m

London Heathrow

mar 3/18

12:10 pm-4:35 pm

Nonstop8h 25m

$630

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/25

Showing 1-10 of 32 results
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Compare providers for flights from Dulles Intl to Heathrow

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 Heathrow in November.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
OvagoPrice Accuracy1 starTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*2 stars
CheapflightsfaresPrice Accuracy3 starsTrust Score*1 star
KAYAKPrice Accuracy1 starTrust Score*3 stars
business-class.comPrice Accuracy3 starsTrust Score*3 stars
MytripPrice Accuracy3 starsTrust Score*3 stars
oojoPrice 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 Washington, D.C. Dulles Intl Airport-London Heathrow Airport 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 Heathrow Airport 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 Heathrow Airport 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 Heathrow 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 Washington, D.C. Dulles Intl Airport-London Heathrow 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 Dulles Intl to Heathrow

Have a flexible travel schedule? Discover the best time to fly to Heathrow 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 Heathrow

Get recent, data-driven insights about flights from Dulles Intl to Heathrow 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 Heathrow Airport?

Use this chart to determine the optimal time to book a round-trip flight from Dulles Intl to Heathrow. Price data was last updated on November 22, 2024.

To ensure you get the cheapest price possible for a flight from Washington, D.C. Dulles Intl Airport to London Heathrow Airport, you should look to book at least 89 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 Heathrow Airport?

Currently, November is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to London Heathrow Airport (average of $661). Flying from Washington, D.C. Dulles Intl Airport to London Heathrow Airport in June is currently the most expensive (average of $1,088). 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 LHR?

Find hourly flight availability from Dulles Intl to Heathrow. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated novembre 26, 2024.

It’s optimal to fly from Washington, D.C. Dulles Intl Airport to London Heathrow Airport in the morning. By choosing this option you can save up to 9% on the cost of your flight, compared to a flight in the evening.

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

Use this chart to determine the cheapest time to fly round-trip from Dulles Intl to Heathrow. Price data was last updated on November 18, 2024.

Travelers seeking maximum savings on their Washington, D.C. Dulles Intl Airport to London Heathrow Airport flight should consider departing on Monday mornings when fares are most often at their lowest. Sunday mornings 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 Heathrow Airport

Explore weekly flight availability from Dulles Intl to Heathrow. 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 novembre 26, 2024.

The most flights from IAD to LHR are scheduled on a Wednesday (26 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (19 on average).

Rainfall in Heathrow by month

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

In terms of precipitation, rainfall in London Heathrow Airport 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 Heathrow Airport when rainfall is around 1.6 in.

Temperature in Heathrow by month

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

If weather is an important factor for your trip to London Heathrow 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 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 Heathrow

Get insights into the airlines that provide service to Heathrow. 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 Heathrow. Reviews last updated novembre 26, 2024.
To help decide which airline to fly from Washington, D.C. to London, see what other customers have to say about TAP AIR PORTUGAL, Scandinavian Airlines and Icelandair. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
8,734 reviews

Overall

8.0

Food

7.3

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Crew

8.6

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
8,734 reviews
Delta
8.0
Very good
8,734 reviews

Overall

8.0

Food

7.3

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Crew

8.6

Reviews

1 / 10

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

Finnair
7.7
Good
1,298 reviews
Delta
8.0
Very good
8,734 reviews

Overall

8.0

Food

7.3

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Crew

8.6

Reviews

1 / 10

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

SWISS
7.6
Good
1,634 reviews
Delta
8.0
Very good
8,734 reviews

Overall

8.0

Food

7.3

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Crew

8.6

Reviews

1 / 10

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

Virgin Atlantic
7.5
Good
662 reviews
Delta
8.0
Very good
8,734 reviews

Overall

8.0

Food

7.3

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Crew

8.6

Reviews

1 / 10

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

Air France
7.4
Good
1,522 reviews
Delta
8.0
Very good
8,734 reviews

Overall

8.0

Food

7.3

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Crew

8.6

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 Heathrow. 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 Heathrow Airport round-trip?

    TAP AIR PORTUGAL, at $547, was found to be the cheapest airline from Washington, D.C. Dulles Intl Airport to London Heathrow Airport.Alternate airlines to your destination round-trip include Scandinavian Airlines and Icelandair. TAP AIR PORTUGAL is priced at 30% 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 Heathrow Airport one-way?

    One-way options have recently been found by users for as low as $217 on Icelandair. Other airlines that offer cheap prices include Lufthansa from $288 and TAP AIR PORTUGAL from $299 one-way.

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

    Consider Air France (82%), Virgin Atlantic (76%) or Singapore Airlines (76%) when booking your flight. These represent the most reliable airlines when flying from Washington, D.C. Dulles Intl Airport to London Heathrow Airport.

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

    On average you can expect to pay $2,068 for a flight from Washington, D.C. Dulles Intl Airport to London Heathrow Airport. The cheapest flight overall is $379 while the most popular route, (Washington, D.C. Dulles Intl - London Heathrow) is currently priced at $452.

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

    Most of the time, Washington, D.C. Dulles Intl Airport to London Heathrow Airport flights that have layovers will stop in Reykjavik.

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

    Hallgrímskirkja, Harpa, and Laugardalslaug Geothermal Pool are the most popular attractions in Reykjavik if you're in need of something to do during your layover. 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. Travelers can book a car rental at Reykjavik Keflavik Intl for about $47 per day to make their sightseeing more efficient.

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

    Flights departing from Washington, D.C. Dulles Intl Airport and landing in London Heathrow Airport layover in Dublin least frequently.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Dulles Intl to Heathrow 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 Heathrow Airport?

    Currently, November is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to London Heathrow Airport (average of $661). Flying from Washington, D.C. Dulles Intl Airport to London Heathrow Airport in June is currently the most expensive (average of $1,088). 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

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Top 10 airlines flying from Dulles Intl to Heathrow

Discover the top 10 airlines that operate flights from Dulles Intl to Heathrow. 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 2,683,152 searches. Data last updated novembre 26, 2024.
AirlineCheapestAverageFlexibilityOn-time
PLAYCheapest$381Average$483FlexibilityNo cancel feeOn-timeN/A
Scandinavian AirlinesCheapest$432Average$554FlexibilityNo cancel feeOn-time77%
TAP AIR PORTUGALCheapest$470Average$649FlexibilityNo cancel feeOn-timeN/A
Aer LingusCheapest$479Average$584FlexibilityNo cancel feeOn-timeN/A
IcelandairCheapest$485Average$683FlexibilityNo cancel feeOn-time76%
KLMCheapest$546Average$771FlexibilityNo cancel feeOn-time75%
FinnairCheapest$551Average$694FlexibilityNo cancel feeOn-time76%
SWISSCheapest$572Average$781FlexibilityNo cancel feeOn-time79%
IberiaCheapest$583Average$755FlexibilityNo cancel feeOn-time77%
DeltaCheapest$583Average$825FlexibilityNo cancel feeOn-timeN/A
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