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Cheap flights from Washington, D.C. Dulles Intl Airport to London Heathrow Airport from £323

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 6/7. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — LHR
21 Jun — 28 Jun1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Washington, D.C. Dulles Intl to London Heathrow are usually found in August or October, booked 63 days in advance, depart on a Tuesday or Monday and return on a Wednesday

Cheap flight deals from Dulles Intl to Heathrow

Enter your travel dates to find the best prices.

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 22 May 2026.

Thu 1/1020:20
IAD
-
LHR
2 stops15h 05m
Scandinavian Airlines
Sun 11/1010:20
LHR
-
IAD
1 stop11h 40m
Scandinavian Airlines
Deal found 18/5£626
Wed 7/1020:20
IAD
-
LHR
2 stops15h 05m
Scandinavian Airlines
Sat 17/1006:40
LHR
-
IAD
2 stops15h 20m
Scandinavian Airlines
Deal found 18/5£627
Fri 16/1020:20
IAD
-
LHR
1 stop12h 15m
Scandinavian Airlines
Wed 21/1021:05
LHR
-
IAD
2 stops24h 55m
Scandinavian Airlines
Deal found 18/5£628
Fri 25/920:20
IAD
-
LHR
2 stops17h 10m
Scandinavian Airlines
Mon 5/1007:05
LHR
-
IAD
2 stops14h 55m
Scandinavian Airlines
Deal found 17/5£628
Sat 3/1020:20
IAD
-
LHR
2 stops15h 40m
Scandinavian Airlines
Mon 12/1006:40
LHR
-
IAD
2 stops15h 20m
Scandinavian Airlines
Deal found 17/5£630
Wed 28/1022:45
IAD
-
LHR
Nonstop7h 15m
Iberia
Wed 11/1108:25
LHR
-
IAD
1 stop12h 55m
Iberia
Deal found 18/5£631
Tue 28/720:20
IAD
-
LHR
1 stop11h 40m
SWISS
Wed 12/808:40
LHR
-
IAD
1 stop13h 05m
SWISS
Deal found 16/5£631
Thu 8/1020:20
IAD
-
LHR
2 stops15h 05m
Scandinavian Airlines
Mon 12/1010:20
LHR
-
IAD
1 stop11h 40m
Scandinavian Airlines
Deal found 17/5£633
Wed 29/720:20
IAD
-
LHR
1 stop15h 05m
SWISS
Wed 12/808:40
LHR
-
IAD
1 stop13h 05m
SWISS
Deal found 18/5£634
Wed 19/822:55
IAD
-
LHR
Nonstop7h 25m
KLM
Wed 9/909:55
LHR
-
IAD
1 stop10h 40m
KLM
Deal found 18/5£634
Fri 12/620:20
IAD
-
LHR
1 stop14h 40m
Scandinavian Airlines
Sat 27/606:40
LHR
-
IAD
1 stop15h 20m
Scandinavian Airlines
Deal found 17/5£635
Tue 29/922:25
IAD
-
LHR
Nonstop7h 25m
British Airways
Tue 6/1012:35
LHR
-
IAD
Nonstop8h 20m
British Airways
Deal found 17/5£636

Find 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 22 May 2026.

Round-trip from

£626

One-way from

£323

Popular in

June

Cheapest in

August

Average price

£704

Good round-trip deal

£850 or less

Good one-way deal

£421 or less
Scandinavian Airlines
  • Scandinavian Airlines
  • 1/10-11/10
  • 3 total stops
  • 26h 45m total
  • Washington, D.C. to London
Search Deals
Icelandair
  • Icelandair
  • 6/7
  • 1 total stop
  • 10h 25m total
  • Washington, D.C. to London
Search Deals
Highest demand for flights based on searches. 19% potential increase in price (£106 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£18 potential savings vs. average return price).
Search Deals
Average for round-trip flights in May 2026
Search Deals
Price to beat on a round-trip flight from Washington, D.C. Dulles Intl to London Heathrow.
Search Deals
Price to beat on a one-way flight from Washington, D.C. Dulles Intl to London Heathrow.
Search Deals

Cheapflights Fare Finder

 
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 22 May 2026.
Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to London Heathrow Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Tue 15/9

18:35-06:55

Nonstop7h 20m

London Heathrow

Fri 25/9

06:50-14:15

1 stop12h 25m

£634

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Thu 8/10

20:20-18:50

2 stops17h 30m

London Heathrow

Mon 12/10

06:40-17:00

2 stops15h 20m

£654
Fastest return journey

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Wed 30/9

21:30-09:50

Nonstop7h 20m

London Heathrow

Fri 9/10

12:35-15:55

Nonstop8h 20m

£656

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Thu 8/10

18:35-06:55

Nonstop7h 20m

London Heathrow

Tue 13/10

06:50-14:15

1 stop12h 25m

£669

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Thu 8/10

22:55-11:20

Nonstop7h 25m

London Heathrow

Tue 13/10

09:55-15:35

1 stop10h 40m

£672

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Wed 26/8

18:30-06:55

Nonstop7h 25m

London Heathrow

Sun 13/9

06:50-13:30

1 stop11h 40m

£672

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Fri 14/8

20:20-19:20

1 stop18h 00m

London Heathrow

Tue 18/8

18:40-16:45

1 stop27h 05m

£678

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Thu 8/10

18:35-06:55

Nonstop7h 20m

London Heathrow

Sat 17/10

06:50-14:15

1 stop12h 25m

£709

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Sat 5/9

22:55-11:20

Nonstop7h 25m

London Heathrow

Mon 14/9

08:55-16:05

1 stop12h 10m

£713

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Wed 12/8

22:15-10:40

Nonstop7h 25m

London Heathrow

Sun 16/8

07:30-15:15

1 stop12h 45m

£716

Flights are sorted by cheapest return flights first.

Deals found on 19/5

Showing 1-10 of 24 resultsSorted by cheapest first
1
2
3

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.

Cheapflights Insights

Everything you need to know about your flight from Washington, D.C. Dulles Intl Airport to London Heathrow Airport

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

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 62 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, August is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to London Heathrow Airport (average of £509). Flying from Washington, D.C. Dulles Intl Airport to London Heathrow Airport in June is currently the most expensive (average of £862). 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 22 May 2026.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Washington, D.C. Dulles Intl Airport to London Heathrow Airport as you normally would.

How much does it cost for a return flight from Washington, D.C. Dulles Intl Airport to London Heathrow Airport?

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 22 May 2026.
Check out reviews from past customers who have flown with Virgin Atlantic,United Airlines, andIcelandair from Washington, D.C. Dulles Intl Airport to London Heathrow Airport to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Virgin Atlantic
7.5
Good
689 reviews
Check prices

Boarding

7.7

Overall

7.5

Comfort

7.3

Entertainment

7.5

Food

6.9

Crew

8.1

Reviews

1 / 20
10.0
Excellent

Edwin,May 2026

LHR - LAX

First time flying with Virgin. It was everything I hoped it would be.
Virgin Atlantic
7.5
Good
689 reviews
Virgin Atlantic
7.5
Good
689 reviews
Check prices

Boarding

7.7

Overall

7.5

Comfort

7.3

Entertainment

7.5

Food

6.9

Crew

8.1

Reviews

1 / 20
10.0
Excellent

Edwin,May 2026

LHR - LAX

First time flying with Virgin. It was everything I hoped it would be.
United Airlines
7.4
Good
9,752 reviews
Virgin Atlantic
7.5
Good
689 reviews
Check prices

Boarding

7.7

Overall

7.5

Comfort

7.3

Entertainment

7.5

Food

6.9

Crew

8.1

Reviews

1 / 20
10.0
Excellent

Edwin,May 2026

LHR - LAX

First time flying with Virgin. It was everything I hoped it would be.
Icelandair
7.0
Good
657 reviews
Virgin Atlantic
7.5
Good
689 reviews
Check prices

Boarding

7.7

Overall

7.5

Comfort

7.3

Entertainment

7.5

Food

6.9

Crew

8.1

Reviews

1 / 20
10.0
Excellent

Edwin,May 2026

LHR - LAX

First time flying with Virgin. It was everything I hoped it would be.
Lufthansa
6.8
Okay
8,019 reviews
Virgin Atlantic
7.5
Good
689 reviews
Check prices

Boarding

7.7

Overall

7.5

Comfort

7.3

Entertainment

7.5

Food

6.9

Crew

8.1

Reviews

1 / 20
10.0
Excellent

Edwin,May 2026

LHR - LAX

First time flying with Virgin. It was everything I hoped it would be.
British Airways
6.7
Okay
7,992 reviews
Virgin Atlantic
7.5
Good
689 reviews
Check prices

Boarding

7.7

Overall

7.5

Comfort

7.3

Entertainment

7.5

Food

6.9

Crew

8.1

Reviews

1 / 20
10.0
Excellent

Edwin,May 2026

LHR - LAX

First time flying with Virgin. It was everything I hoped it would be.

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.

  • How long is the flight from Washington, D.C. Dulles Intl Airport to London Heathrow Airport?

    There are many flights that can get you from Washington, D.C. Dulles Intl Airport to London Heathrow Airport in 7h 20m. Fly via United Airlines, Scandinavian Airlines, or British Airways to get the fastest option. Airlines will cover a distance of 3664 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

  • What are the cheapest airlines flying from Washington, D.C. Dulles Intl Airport to London Heathrow Airport round-trip?

    Currently priced at £309, Lufthansa will fly you from Washington, D.C. Dulles Intl Airport to London Heathrow Airport and back. In addition to Lufthansa, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Icelandair and Virgin Atlantic - these airlines can fly you to your destination from £368 and £378, respectively. You may be able to fly from Washington, D.C. Dulles Intl Airport to London Heathrow Airport for 48% 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 TAP AIR PORTUGAL. According to our data, you can fly for as low as £159. Users have also found prices from £262 and £266 on Virgin Atlantic and British Airways, 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: United Airlines (86%), Aer Lingus (83%), Finnair( 83%).

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

    On average you can expect to pay £853 for a flight from Washington, D.C. Dulles Intl Airport to London Heathrow Airport. The cheapest flight overall is £365 while the most popular route, (Washington, D.C. Dulles Intl - London Heathrow) is currently priced at £457.

  • 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, August is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to London Heathrow Airport (average of £509). Flying from Washington, D.C. Dulles Intl Airport to London Heathrow Airport in June is currently the most expensive (average of £862). 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 London Heathrow Airport?

Book flights to London Heathrow Airport if you plan to visit one of these locations
Hounslow
Milton Keynes
Croydon
Northampton
Wembley
Luton
Gatwick
Slough
Ilford
Hayes
Brentford
Colchester
Watford
Romford
Kingston upon Thames
Eastbourne
Ipswich
Swindon
Guildford
Southall

Browse thousands of different options on Cheapflights for your next trip

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Top 5 airlines flying from Dulles Intl to Heathrow

Discover the top 5 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 22 May 2026.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest£309Average£404FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
IcelandairCheapest£368Average£697FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Virgin AtlanticCheapest£378Average£569FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
British AirwaysCheapest£385Average£577FlexibilityNo cancel feeOn-time70%
Search British Airways flights
United AirlinesCheapest£490Average£659FlexibilityNo cancel feeOn-time69%
Search United Airlines flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

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

Deals for Dulles Intl to Heathrow flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

Why should you use Cheapflights to find cheap flight tickets from Dulles Intl to Heathrow?

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from Dulles Intl to Heathrow.

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?

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

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