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Cheap flights from Washington, D.C. Dulles Intl Airport to London Heathrow Airport from £207

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 25/2. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — LHR
19 2월 — 26 2월1
1 adult

The best prices from Washington, D.C. Dulles Intl to London Heathrow are usually found in September or October, booked 36 days in advance, depart on a Tuesday or Monday and return on a Wednesday

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 14 2월 2025.

Round-trip from

£436

One-way from

£207

Popular in

June

Cheapest in

September

Average price

£553

Good round-trip deal

£519 or less

Good one-way deal

£308 or less
Icelandair
  • Icelandair
  • 28/4-13/5
  • 2 total stops
  • 37h 20m total
  • Washington, D.C. to London
Icelandair
  • Icelandair
  • 25/2
  • 1 total stop
  • 18h 50m total
  • Washington, D.C. to London
Highest demand for flights based on searches. 17% potential increase in price (£106 potential increase over avg. return price).
Cheapest flight prices on average. 3% potential price decrease (£20 potential savings vs. average return price).
Average for round-trip flights in February 2025
Price to beat on a round-trip flight from Washington, D.C. Dulles Intl to London Heathrow.
Price to beat on a one-way flight from Washington, D.C. Dulles Intl to London Heathrow.

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 14 2월 2025.

월 28/420:30IAD - LHR
1 stop10h 25mIcelandair
화 13/521:25LHR - IAD
1 stop26h 55mIcelandair
Deal found 12/2£436
수 19/217:10IAD - LHR
1 stop11h 10mScandinavian Airlines
수 26/217:00LHR - IAD
1 stop27h 40mScandinavian Airlines
Deal found 12/2£445
화 18/322:55IAD - LHR
Nonstop7h 10mIberia
수 26/312:10LHR - IAD
Nonstop8h 25mIberia
Deal found 12/2£463
월 17/219:15IAD - LHR
1 stop17h 15mTAP AIR PORTUGAL
수 5/306:00LHR - IAD
1 stop20h 00mTAP AIR PORTUGAL
Deal found 13/2£467
수 12/312:15IAD - LHR
1 stop14h 10mVirgin Atlantic
수 19/312:25LHR - IAD
Nonstop8h 40mVirgin Atlantic
Deal found 13/2£474
수 5/321:15IAD - LHR
1 stop9h 10mAer Lingus
수 23/409:50LHR - IAD
1 stop11h 00mAer Lingus
Deal found 12/2£476
일 2/310:35IAD - LHR
2 stops15h 35mMultiple Airlines
화 11/306:00LHR - IAD
1 stop13h 35mMultiple Airlines
Deal found 12/2£481
수 12/323:50IAD - LHR
Nonstop7h 15mUnited Airlines
수 26/312:05LHR - IAD
1 stop33h 20mUnited Airlines
Deal found 13/2£489
수 12/315:55IAD - LHR
1 stop11h 15mAir Canada
수 19/308:55LHR - IAD
2 stops15h 46mAir Canada
Deal found 13/2£491
월 10/319:45IAD - LHR
Nonstop7h 30mDelta
화 18/308:40LHR - IAD
1 stop12h 05mDelta
Deal found 12/2£492
일 2/318:00IAD - LHR
Nonstop7h 15mFinnair
화 11/312:10LHR - IAD
Nonstop8h 25mFinnair
Deal found 12/2£494
월 3/318:59IAD - LHR
1 stop11h 41mAir France
화 11/309:00LHR - IAD
1 stop12h 15mAir France
Deal found 12/2£499

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 14 2월 2025.

Fly from

Dulles Intl

Fly to

Heathrow

Route

Depart

Return

Price

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

월 28/4

20:30-11:55

1 stop10h 25m

London Heathrow

화 13/5

21:25-19:20

1 stop26h 55m

£436

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

월 24/2

17:10-09:20

1 stop11h 10m

London Heathrow

화 11/3

17:00-16:40

1 stop27h 40m

£445

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

수 23/4

22:40-11:05

Nonstop7h 25m

London Heathrow

수 30/4

17:00-20:10

Nonstop8h 10m

£460

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

수 12/3

22:55-10:05

Nonstop7h 10m

London Heathrow

수 19/3

16:30-20:45

Nonstop8h 15m

£473

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

수 12/3

12:15-06:25

1 stop14h 10m

London Heathrow

수 19/3

12:25-17:05

Nonstop8h 40m

£474

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

수 5/3

21:15-11:25

1 stop9h 10m

London Heathrow

수 23/4

13:25-19:30

1 stop11h 05m

£476

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

일 2/3

15:55-07:10

1 stop10h 15m

London Heathrow

화 11/3

08:55-17:25

1 stop12h 30m

£488

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

수 12/3

23:50-11:05

Nonstop7h 15m

London Heathrow

수 26/3

12:05-17:25

1 stop33h 20m

£489

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

수 12/3

15:55-07:10

1 stop11h 15m

London Heathrow

수 19/3

08:55-20:41

2 stops15h 46m

£489

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

월 10/3

19:45-07:15

Nonstop7h 30m

London Heathrow

수 19/3

06:30-16:45

1 stop14h 15m

£492

Flights are sorted by cheapest return flights first.

Deals found on 13/2

Showing 1-10 of 31 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 7 February 2025.

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 36 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 August is currently the most expensive (average of £162). 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 14 2월 2025.

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 13% 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 14 2월 2025.

The most flights from IAD to LHR are scheduled on a Wednesday (27 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (12 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 14 2월 2025.
Get a feel of what it's like to fly with Delta, Finnair and Austrian 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.

Overall

8.0

Crew

8.5

Entertainment

7.9

Food

7.3

Boarding

8.2

Comfort

8.0

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

LAX - LHR

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

8.0
Very Good

Overall

8.0

Crew

8.5

Entertainment

7.9

Food

7.3

Boarding

8.2

Comfort

8.0

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

LAX - LHR

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

Overall

8.0

Crew

8.5

Entertainment

7.9

Food

7.3

Boarding

8.2

Comfort

8.0

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

LAX - LHR

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

Overall

8.0

Crew

8.5

Entertainment

7.9

Food

7.3

Boarding

8.2

Comfort

8.0

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

LAX - LHR

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

Overall

8.0

Crew

8.5

Entertainment

7.9

Food

7.3

Boarding

8.2

Comfort

8.0

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

LAX - LHR

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

Overall

8.0

Crew

8.5

Entertainment

7.9

Food

7.3

Boarding

8.2

Comfort

8.0

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

LAX - LHR

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 £436, 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 Iberia - these airlines can fly you to your destination from £445 and £460, respectively. You may be able to fly from Washington, D.C. Dulles Intl Airport to London Heathrow Airport for 30% 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 £207. Users have also found prices from £238 and £293 on TAP AIR PORTUGAL and Scandinavian Airlines, 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: Air France (88%), Virgin Atlantic (88%), KLM( 88%).

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

    On average you can expect to pay £508 for a flight from Washington, D.C. Dulles Intl Airport to London Heathrow Airport. The cheapest flight overall is £191 while the most popular route, (Washington, D.C. Dulles Intl - London Heathrow) is currently priced at £393.

  • 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 August is currently the most expensive (average of £162). 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

Travelling 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
Deal
Hounslow
Croydon
Milton Keynes
Gatwick
Slough
Luton
Ilford
Hayes
Eastbourne
Swindon
Northampton
Southend-on-Sea
Wembley
Ipswich
Maidstone
Winchester
Crawley
Southall
Watford

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Top 8 airlines flying from Dulles Intl to Heathrow

Discover the top 8 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 14 2월 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest£401Average£581FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Virgin AtlanticCheapest£467Average£610FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
Air FranceCheapest£471Average£592FlexibilityNo cancel feeOn-time77%
Search Air France flights
United AirlinesCheapest£473Average£759FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
British AirwaysCheapest£480Average£624FlexibilityNo cancel feeOn-time70%
Search British Airways flights
KLMCheapest£493Average£636FlexibilityNo cancel feeOn-time75%
Search KLM flights
IberiaCheapest£497Average£550FlexibilityNo cancel feeOn-time77%
Search Iberia flights
LufthansaCheapest£514Average£745FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights

Fly with Cheapflights

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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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