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Cheap flights from Washington, D.C. Dulles Intl Airport to London Heathrow Airport from £190

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 31/1. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — LHR
22 Dec — 29 Dec1
1 adult

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 Tuesday or Saturday and return on a Tuesday

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 17 December 2024.

Round-trip from

£423

One-way from

£191

Popular in

June

Cheapest in

September

Average price

£679
Icelandair
  • Icelandair
  • 25/2-3/3
  • 2 total stops
  • 21h 20m total
  • Washington, D.C. to London
Icelandair
  • Icelandair
  • 2/2
  • 1 total stop
  • 10h 10m total
  • Washington, D.C. to London
High demand for flights, 17% potential price rise
Best time to find cheap flights, 3% potential price drop
Average for round-trip flights in December 2024

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 17 December 2024.

Sun 29/1219:40IAD - LHR
1 stop10h 10mIcelandair
Sun 12/120:40LHR - IAD
1 stop26h 45mIcelandair
Deal found 15/12£484
Tue 31/1218:25IAD - LHR
Nonstop7h 15mMultiple Airlines
Fri 31/107:30LHR - IAD
1 stop13h 20mMultiple Airlines
Deal found 15/12£496
Mon 30/1214:35IAD - LHR
1 stop12h 55mUnited Airlines
Thu 30/109:30LHR - IAD
2 stops29h 16mUnited Airlines
Deal found 16/12£502
Tue 31/1221:55IAD - LHR
Nonstop7h 10mIberia
Fri 31/112:10LHR - IAD
Nonstop8h 25mIberia
Deal found 15/12£505
Tue 31/1217:50IAD - LHR
2 stops14h 10mLufthansa
Fri 31/106:30LHR - IAD
1 stop14h 20mLufthansa
Deal found 15/12£535
Tue 31/1218:25IAD - LHR
Nonstop7h 30mDelta
Sat 1/208:40LHR - IAD
1 stop12h 05mDelta
Deal found 15/12£544
Tue 31/1217:30IAD - LHR
1 stop14h 10mTAP AIR PORTUGAL
Sat 1/219:55LHR - IAD
1 stop30h 05mTAP AIR PORTUGAL
Deal found 15/12£545
Tue 31/1221:55IAD - LHR
Nonstop7h 10mFinnair
Sat 1/216:30LHR - IAD
Nonstop8h 15mFinnair
Deal found 15/12£555
Mon 30/1212:59IAD - LHR
1 stop13h 56mVirgin Atlantic
Sun 12/112:25LHR - IAD
Nonstop8h 40mVirgin Atlantic
Deal found 15/12£558
Mon 30/1217:10IAD - LHR
2 stops16h 25mScandinavian Airlines
Sun 16/219:30LHR - IAD
1 stop25h 10mScandinavian Airlines
Deal found 16/12£592
Sun 29/1220:45IAD - LHR
2 stops19h 40mSWISS
Sun 12/119:30LHR - IAD
2 stops49h 55mSWISS
Deal found 15/12£615
Sun 29/1218:00IAD - LHR
1 stop19h 40mAustrian Airlines
Thu 20/206:00LHR - IAD
1 stop13h 35mAustrian Airlines
Deal found 16/12£617

Find flights from Dulles Intl to Heathrow within your budget

Customise 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 858,174 searches. Data last updated 17 December 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

Tue 25/2

19:40-10:50

1 stop10h 10m

London Heathrow

Mon 3/3

12:15-18:25

1 stop11h 10m

£423

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Mon 20/1

17:10-09:20

1 stop11h 10m

London Heathrow

Sun 2/2

21:05-15:40

2 stops23h 35m

£427

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Sun 19/1

22:30-17:30

1 stop14h 00m

London Heathrow

Wed 22/1

18:30-15:00

1 stop25h 30m

£461

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Wed 5/3

18:00-06:15

Nonstop7h 15m

London Heathrow

Wed 12/3

12:10-16:35

Nonstop8h 25m

£466

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Sun 26/1

19:40-16:35

2 stops15h 55m

London Heathrow

Thu 30/1

06:20-18:25

2 stops17h 05m

£472

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Wed 15/1

18:45-07:15

Nonstop7h 30m

London Heathrow

Wed 22/1

06:20-16:15

1 stop14h 55m

£490

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Mon 17/2

18:00-06:15

Nonstop7h 15m

London Heathrow

Tue 25/2

16:30-19:45

Nonstop8h 15m

£495

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Sun 12/1

22:30-11:05

Nonstop7h 35m

London Heathrow

Tue 21/1

07:30-15:50

1 stop13h 20m

£498

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Tue 18/3

15:55-07:10

1 stop11h 15m

London Heathrow

Fri 28/3

13:30-08:05

2 stops22h 35m

£506

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Tue 7/1

18:25-06:55

Nonstop7h 30m

London Heathrow

Wed 15/1

06:30-15:45

1 stop14h 15m

£512

Flights are sorted by cheapest return flights first.

Deals found on 16/12

Showing 1-10 of 27 results
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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 return 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 return flight from Dulles Intl to Heathrow. Price data was last updated on 13 December 2024.

The price you pay for your flight from Washington, D.C. Dulles Intl Airport to London Heathrow Airport may vary depending on when you book. For the best chance of a lower fare, look to book 89 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 Washington, D.C. Dulles Intl Airport to London Heathrow Airport?

Currently, January is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to London Heathrow Airport (average of £112). Flying from Washington, D.C. Dulles Intl Airport to London Heathrow Airport in July is currently the most expensive (average of £160). 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 17 December 2024.

When flying from Washington, D.C. Dulles Intl Airport to London Heathrow Airport, the time of day you fly usually plays a role in the price. Save by searching for a flight in the afternoon, which can drop the price by up to 16% versus a flight in the morning.

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 17 December 2024.

The most flights from IAD to LHR are scheduled on a Monday (27 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (23 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 40.0 - 70.0 inches per month. January is typically the wettest month, when rainfall can reach 70.0 mm. July is typically the driest time to visit London Heathrow Airport when rainfall is around 40.0 mm.

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 17.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 4.0 C).

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 17 December 2024.
Get a feel of what it's like to fly with Delta, Icelandair and Scandinavian Airlines from Washington, D.C. to London by reading reviews from past customers. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
8.0
Very Good
8,615 reviews

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

Entertainment

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.

8.0
Very Good
8,615 reviews
8.0
Very Good
8,615 reviews

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

Entertainment

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.

7.7
Good
1,287 reviews
8.0
Very Good
8,615 reviews

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

Entertainment

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.

7.6
Good
1,607 reviews
8.0
Very Good
8,615 reviews

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

Entertainment

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.

7.6
Good
788 reviews
8.0
Very Good
8,615 reviews

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

Entertainment

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.

7.5
Good
667 reviews
8.0
Very Good
8,615 reviews

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

Entertainment

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?

    Currently priced at £423, Icelandair will fly you from Washington, D.C. Dulles Intl Airport to London Heathrow Airport and back. In addition to Icelandair, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Scandinavian Airlines and TAP AIR PORTUGAL - these airlines can fly you to your destination from £428 and £462, respectively. You may be able to fly from Washington, D.C. Dulles Intl Airport to London Heathrow Airport for 31% less than the average price by searching for these airlines.

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

    For one-way options, check prices for Icelandair. According to our data, you can fly for as low as £191. Users have also found prices from £235 and £271 on TAP AIR PORTUGAL and Lufthansa, respectively.

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

    Before booking your flight to London Heathrow Airport from Washington, D.C. Dulles Intl Airport, check out the most reliable airlines to get you to your destination 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 Heathrow Airport?

    On average you can expect to pay £1,251 for a flight from Washington, D.C. Dulles Intl Airport to London Heathrow Airport. The cheapest flight overall is £327 while the most popular route, (Washington, D.C. Dulles Intl - London Heathrow) is currently priced at £356.

  • 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 holiday 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, January is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to London Heathrow Airport (average of £112). Flying from Washington, D.C. Dulles Intl Airport to London Heathrow Airport in July is currently the most expensive (average of £160). 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 858,174 searches. Data last updated 17 December 2024.
AirlineCheapestAverageFlexibilityOn-time
Aer LingusCheapest£328Average£523FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
IcelandairCheapest£396Average£570FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Virgin AtlanticCheapest£461Average£587FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
Air FranceCheapest£465Average£649FlexibilityNo cancel feeOn-time77%
Search Air France flights
United AirlinesCheapest£467Average£748FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
IberiaCheapest£473Average£569FlexibilityNo cancel feeOn-time77%
Search Iberia flights
British AirwaysCheapest£474Average£582FlexibilityNo cancel feeOn-time70%
Search British Airways flights
KLMCheapest£490Average£559FlexibilityNo cancel feeOn-time75%
Search KLM flights
American AirlinesCheapest£492Average£794FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
LufthansaCheapest£508Average£682FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights

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How does Cheapflights help users find flights from Dulles Intl to Heathrow?

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Can Cheapflights find flights from Dulles Intl to Heathrow with no change fees?

Need flexible booking options for your flight to Heathrow from Dulles Intl? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

Can Cheapflights notify me if prices for flights from Dulles Intl to Heathrow become cheaper?

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