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Heathrow

$328+ Cheap flights from Dulles Intl (IAD) to Heathrow (LHR)

IAD — LHR
Nov 11 — Nov 181
Wed 11/11
Wed 11/18
1 adult, Economy
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Find cheap flights from Dulles Intl to Heathrow with Cheapflights

1. Tell us where you want to go

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3. Compare prices and book

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Cheapflights Tip: The best prices from Washington, D.C. Dulles Intl to London Heathrow are usually found in February or January, booked 66 days in advance, depart on a Wednesday or Monday and return on a Wednesday

Cheap flight deals from Dulles Intl to Heathrow

Cheapest flights from Dulles Intl to Heathrow

Thu 12/38:30 pm -
2 stops17h 20m
Fri 12/111:55 pm -
2 stops33h 55m
Deal found 10/8$680
Mon 11/308:30 pm -
1 stop31h 50m
Thu 12/36:40 am -
2 stops15h 35m
Deal found 10/9$682
Mon 12/78:30 pm -
2 stops20h 05m
Mon 12/147:05 am -
2 stops15h 10m
Deal found 10/7$684
Thu 12/108:30 pm -
1 stop17h 00m
Wed 12/167:05 am -
2 stops15h 10m
Deal found 10/10$688
Wed 12/28:30 pm -
1 stop14h 30m
Thu 12/176:40 am -
1 stop15h 35m
Deal found 10/9$690
Thu 12/108:30 pm -
1 stop20h 10m
Tue 12/156:05 pm -
2 stops28h 10m
Deal found 10/8$691
Mon 12/78:30 pm -
1 stop14h 30m
Sun 12/139:05 pm -
2 stops25h 10m
Deal found 10/9$692
Tue 11/105:25 pm -
1 stop19h 05m
Tue 11/176:00 am -
1 stop13h 40m
Deal found 10/9$695
Tue 11/105:25 pm -
1 stop19h 05m
Wed 11/186:30 pm -
1 stop25h 45m
Deal found 10/8$696
Sat 12/58:30 pm -
2 stops15h 30m
Sun 12/139:05 pm -
2 stops25h 10m
Deal found 10/9$697

Find flight deals from Dulles Intl to Heathrow

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$680
(oojo)

One-way from

$328
(Air Canada)

Popular in

June

Cheapest in

February

Average price

$900

Good round-trip deal

$795 or less

Good one-way deal

$450 or less
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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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
Search Deals
Highest demand for flights based on searches. 18% potential increase in price ($203 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($36 potential savings vs. average RT price).
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Average for round-trip flights in October 2026
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Price to beat on a round-trip flight from Washington, D.C. Dulles Intl to London Heathrow.
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Price to beat on a one-way flight from Washington, D.C. Dulles Intl to London Heathrow.
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Cheapflights Fare Finder

 
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 round-trip

Washington, D.C.London

IAD Washington, D.C. Dulles Intl - LHR London Heathrow

IADLHR

Washington, D.C. Dulles Intl

Wed 1/6

11:05 am-10:30 am

2 stops18h 25m

London Heathrow

Wed 12/31

12:00 am-6:00 pm

Nonstop0h 00m

$329

Washington, D.C.London

IAD Washington, D.C. Dulles Intl - LHR London Heathrow

IADLHR

Washington, D.C. Dulles Intl

Fri 1/8

10:15 pm-10:50 am

Nonstop7h 35m

London Heathrow

Wed 12/31

12:00 am-6:00 pm

Nonstop0h 00m

$375

Washington, D.C.London

IAD Washington, D.C. Dulles Intl - LHR London Heathrow

IADLHR

Washington, D.C. Dulles Intl

Wed 11/4

6:55 pm-7:20 am

Nonstop7h 25m

London Heathrow

Wed 12/31

12:00 am-6:00 pm

Nonstop0h 00m

$459
Quickest round-trip

Washington, D.C.London

IAD Washington, D.C. Dulles Intl - LHR London Heathrow

IADLHR

Washington, D.C. Dulles Intl

Wed 11/25

9:55 pm-10:10 am

Nonstop7h 15m

London Heathrow

Wed 12/31

12:00 am-6:00 pm

Nonstop0h 00m

$489

Washington, D.C.London

IAD Washington, D.C. Dulles Intl - LHR London Heathrow

IADLHR

Washington, D.C. Dulles Intl

Wed 11/18

10:15 pm-10:50 am

Nonstop7h 35m

London Heathrow

Wed 12/31

12:00 am-6:00 pm

Nonstop0h 00m

$489

Washington, D.C.London

IAD Washington, D.C. Dulles Intl - LHR London Heathrow

IADLHR

Washington, D.C. Dulles Intl

Tue 12/8

10:15 pm-10:50 am

Nonstop7h 35m

London Heathrow

Wed 12/31

12:00 am-6:00 pm

Nonstop0h 00m

$489

Washington, D.C.London

IAD Washington, D.C. Dulles Intl - LHR London Heathrow

IADLHR

Washington, D.C. Dulles Intl

Wed 11/18

12:32 pm-6:50 am

2 stops13h 18m

London Heathrow

Wed 12/31

12:00 am-6:00 pm

Nonstop0h 00m

$493

Washington, D.C.London

IAD Washington, D.C. Dulles Intl - LHR London Heathrow

IADLHR

Washington, D.C. Dulles Intl

Sun 12/6

8:10 pm-1:00 pm

1 stop11h 50m

London Heathrow

Wed 12/31

12:00 am-6:00 pm

Nonstop0h 00m

$495

Washington, D.C.London

IAD Washington, D.C. Dulles Intl - LHR London Heathrow

IADLHR

Washington, D.C. Dulles Intl

Sat 10/17

12:40 pm-6:30 am

2 stops36h 50m

London Heathrow

Wed 12/31

12:00 am-6:00 pm

Nonstop0h 00m

$497

Washington, D.C.London

IAD Washington, D.C. Dulles Intl - LHR London Heathrow

IADLHR

Washington, D.C. Dulles Intl

Mon 10/19

8:15 am-6:35 am

2 stops17h 20m

London Heathrow

Wed 12/31

12:00 am-6:00 pm

Nonstop0h 00m

$497

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/8

Showing 1-10 of 24 resultsSorted by cheapest first
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Compare providers for flights from Dulles Intl to Heathrow

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 October.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*3 stars
JustAirTicketPrice Accuracy-Trust Score*1 star
CheapflightsfaresPrice Accuracy2 starsTrust Score*1 star
Justfly.comPrice Accuracy3 starsTrust Score*3 stars
BusinessClassPrice Accuracy-Trust Score*3 stars
MytripPrice Accuracy2 starsTrust Score*3 stars
eDreamsPrice Accuracy2 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

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?

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 65 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, February is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to London Heathrow Airport (average of $699). Flying from Washington, D.C. Dulles Intl Airport to London Heathrow Airport in June is currently the most expensive (average of $1,303). 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?

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 to fly round-trip from Washington, D.C. Dulles Intl Airport to London Heathrow Airport?

Airfare is below average for this route at the moment.

Washington, D.C. Dulles Intl Airport to London Heathrow Airport flights typically cost between $781 and $1,057 in December.
The cheapest round-trip price found within the last 5 days was $680 on Scandinavian Airlines (Dec 3-Dec 11).

The best insider tips for Washington, D.C. Dulles Intl Airport to London Heathrow Airport flights

Cheapflights partnered with top experts to bring you the best recommendations for your Washington, D.C. Dulles Intl Airport to London Heathrow Airport trip
Our travel experts
Ramsey Qubein

Ramsey Qubein

Expert on LHR and IAD

An avid traveler and aviation expert who has visited 173 countries, all 50 states and seven continents, Ramsey Qubein flies nearly 400,000 miles a year. As a North Carolina-based freelance journalist for publications including Conde Nast Traveler, Forbes, USA Today and Bloomberg among others, he explores the latest trends in aviation, hospitality, cruises and business.

Read more

Reviews of airlines servicing Heathrow

Read through reviews of airlines operating flights from Washington, D.C. Dulles Intl Airport to London Heathrow Airport, such as Virgin Atlantic,United Airlines, andAmerican Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Virgin Atlantic
7.5
Good
694 reviews

Entertainment

7.5

Food

6.9

Crew

8.1

Overall

7.5

Boarding

7.7

Comfort

7.3

Reviews

1 / 20
6.0
Good

Pratap,Aug 2025

JFK - LHR

The flight is clean, food good and the staff are excellent! Very professional, polite and accommodating. The seat itself is really mediocre. Can’t believe there is not inch of storage space. Believe it or not it there is not place even to put away your phone or pen!! Very very surprising and terribly inconvenient. No coat hanger hook either. Had to give it away. ALL IN ALL VERY INCONVENIENT business class seat compared to their peers. What is even more surprising is that this on their relatively new fleet of Airbus A350-1000. I was having com platelets different expectations of Virgin and this has disappointed me. Everything else is just as good and as you would expect from Virgin!
Virgin Atlantic
7.5
Good
694 reviews
Virgin Atlantic
7.5
Good
694 reviews

Entertainment

7.5

Food

6.9

Crew

8.1

Overall

7.5

Boarding

7.7

Comfort

7.3

Reviews

1 / 20
6.0
Good

Pratap,Aug 2025

JFK - LHR

The flight is clean, food good and the staff are excellent! Very professional, polite and accommodating. The seat itself is really mediocre. Can’t believe there is not inch of storage space. Believe it or not it there is not place even to put away your phone or pen!! Very very surprising and terribly inconvenient. No coat hanger hook either. Had to give it away. ALL IN ALL VERY INCONVENIENT business class seat compared to their peers. What is even more surprising is that this on their relatively new fleet of Airbus A350-1000. I was having com platelets different expectations of Virgin and this has disappointed me. Everything else is just as good and as you would expect from Virgin!
United Airlines
7.4
Good
10,350 reviews
Virgin Atlantic
7.5
Good
694 reviews

Entertainment

7.5

Food

6.9

Crew

8.1

Overall

7.5

Boarding

7.7

Comfort

7.3

Reviews

1 / 20
6.0
Good

Pratap,Aug 2025

JFK - LHR

The flight is clean, food good and the staff are excellent! Very professional, polite and accommodating. The seat itself is really mediocre. Can’t believe there is not inch of storage space. Believe it or not it there is not place even to put away your phone or pen!! Very very surprising and terribly inconvenient. No coat hanger hook either. Had to give it away. ALL IN ALL VERY INCONVENIENT business class seat compared to their peers. What is even more surprising is that this on their relatively new fleet of Airbus A350-1000. I was having com platelets different expectations of Virgin and this has disappointed me. Everything else is just as good and as you would expect from Virgin!
American Airlines
7.0
Good
12,154 reviews
Virgin Atlantic
7.5
Good
694 reviews

Entertainment

7.5

Food

6.9

Crew

8.1

Overall

7.5

Boarding

7.7

Comfort

7.3

Reviews

1 / 20
6.0
Good

Pratap,Aug 2025

JFK - LHR

The flight is clean, food good and the staff are excellent! Very professional, polite and accommodating. The seat itself is really mediocre. Can’t believe there is not inch of storage space. Believe it or not it there is not place even to put away your phone or pen!! Very very surprising and terribly inconvenient. No coat hanger hook either. Had to give it away. ALL IN ALL VERY INCONVENIENT business class seat compared to their peers. What is even more surprising is that this on their relatively new fleet of Airbus A350-1000. I was having com platelets different expectations of Virgin and this has disappointed me. Everything else is just as good and as you would expect from Virgin!
Icelandair
6.9
Okay
758 reviews
Virgin Atlantic
7.5
Good
694 reviews

Entertainment

7.5

Food

6.9

Crew

8.1

Overall

7.5

Boarding

7.7

Comfort

7.3

Reviews

1 / 20
6.0
Good

Pratap,Aug 2025

JFK - LHR

The flight is clean, food good and the staff are excellent! Very professional, polite and accommodating. The seat itself is really mediocre. Can’t believe there is not inch of storage space. Believe it or not it there is not place even to put away your phone or pen!! Very very surprising and terribly inconvenient. No coat hanger hook either. Had to give it away. ALL IN ALL VERY INCONVENIENT business class seat compared to their peers. What is even more surprising is that this on their relatively new fleet of Airbus A350-1000. I was having com platelets different expectations of Virgin and this has disappointed me. Everything else is just as good and as you would expect from Virgin!
British Airways
6.7
Okay
8,261 reviews
Virgin Atlantic
7.5
Good
694 reviews

Entertainment

7.5

Food

6.9

Crew

8.1

Overall

7.5

Boarding

7.7

Comfort

7.3

Reviews

1 / 20
6.0
Good

Pratap,Aug 2025

JFK - LHR

The flight is clean, food good and the staff are excellent! Very professional, polite and accommodating. The seat itself is really mediocre. Can’t believe there is not inch of storage space. Believe it or not it there is not place even to put away your phone or pen!! Very very surprising and terribly inconvenient. No coat hanger hook either. Had to give it away. ALL IN ALL VERY INCONVENIENT business class seat compared to their peers. What is even more surprising is that this on their relatively new fleet of Airbus A350-1000. I was having com platelets different expectations of Virgin and this has disappointed me. Everything else is just as good and as you would expect from Virgin!

Related info for your journey

  • 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 10h 10m. Fly via Icelandair, United Airlines, or Scandinavian Airlines to get the fastest option. The distance between Washington, D.C. Dulles Intl Airport and London Heathrow Airport is about 3664 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

    TAP AIR PORTUGAL, at $422, 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 Virgin Atlantic and Delta. TAP AIR PORTUGAL is priced at 53% 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 $229 on KLM. Other airlines that offer cheap prices include Icelandair from $273 and Iberia from $317 one-way.

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

    Consider Iberia (83%), Aer Lingus (75%) or KLM (73%) 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 $1,416 for a flight from Washington, D.C. Dulles Intl Airport to London Heathrow Airport. The cheapest flight overall is $346 while the most popular route, (Washington, D.C. Dulles Intl - London Heathrow) is currently priced at $466.

  • 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, February is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to London Heathrow Airport (average of $699). Flying from Washington, D.C. Dulles Intl Airport to London Heathrow Airport in June is currently the most expensive (average of $1,303). 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

Traveling to a place near London Heathrow Airport?

Book flights to London Heathrow Airport if you plan to visit one of these locations
Ilford
Dorking
Gatwick
Hounslow
Wembley
Harrow
Southend-on-Sea
Basingstoke
Watford
Northampton
Dartford
Winchester
Croydon
Chipping Norton
Kingston upon Thames
Eastbourne
Slough
Stansted
Sutton
Luton

Browse thousands of different options on Cheapflights for your next trip

Top 10 airlines flying from Dulles Intl to Heathrow

AirlineCheapestAverageFlexibilityOn-time
TAP AIR PORTUGALCheapest$422Average$646FlexibilityNo cancel feeOn-timeN/A
Virgin AtlanticCheapest$432Average$942FlexibilityNo cancel feeOn-time72%
DeltaCheapest$450Average$1,071FlexibilityNo cancel feeOn-timeN/A
IcelandairCheapest$489Average$741FlexibilityNo cancel feeOn-time76%
IberiaCheapest$500Average$865FlexibilityNo cancel feeOn-time77%
Scandinavian AirlinesCheapest$568Average$805FlexibilityNo cancel feeOn-time77%
Air FranceCheapest$581Average$1,067FlexibilityNo cancel feeOn-time77%
SWISSCheapest$593Average$870FlexibilityNo cancel feeOn-time79%
FinnairCheapest$606Average$881FlexibilityNo cancel feeOn-time76%
Aer LingusCheapest$612Average$897FlexibilityNo cancel feeOn-timeN/A

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