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Cheap flights from Dulles Intl (IAD) to Heathrow (LHR) - Compare and Save

IAD — LHR
may. 21 — may. 281
jue. 5/21
jue. 5/28
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
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 Wednesday or Tuesday 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 abril 21, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$731
(CrystalTravel)

One-way from

$368
(Kiwi.com)

Popular in

June

Cheapest in

August

Average price

$780

Good round-trip deal

$927 or less

Good one-way deal

$495 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
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Highest demand for flights based on searches. 15% potential increase in price ($143 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($28 potential savings vs. average RT price).
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Average for round-trip flights in April 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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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 abril 21, 2026.

This FlightHub deal was found by Cheapflights users on 4/20. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 10/108:20 pm
IAD
-
LHR
1 stop16h 20m
Scandinavian Airlines
dom. 10/119:05 pm
LHR
-
IAD
2 stops24h 55m
Scandinavian Airlines
Deal found 4/20$693
This FlightHub deal was found by Cheapflights users on 4/20. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 10/108:20 pm
IAD
-
LHR
2 stops15h 05m
Scandinavian Airlines
dom. 10/119:05 pm
LHR
-
IAD
2 stops24h 55m
Scandinavian Airlines
Deal found 4/20$694
This Justfly.com deal was found by Cheapflights users on 4/19. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 10/238:20 pm
IAD
-
LHR
2 stops33h 15m
Scandinavian Airlines
lun. 10/266:40 am
LHR
-
IAD
1 stop15h 35m
Scandinavian Airlines
Deal found 4/19$711
This Kiwi.com deal was found by Cheapflights users on 4/16. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 10/18:20 pm
IAD
-
LHR
1 stop14h 40m
Scandinavian Airlines
lun. 10/510:20 am
LHR
-
IAD
1 stop11h 40m
Scandinavian Airlines
Deal found 4/16$714
This Gotogate deal was found by Cheapflights users on 4/16. 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.
sáb. 11/147:40 pm
IAD
-
LHR
1 stop18h 50m
Icelandair
sáb. 11/2112:15 pm
LHR
-
IAD
1 stop11h 15m
Icelandair
Deal found 4/16$717
This Gotogate deal was found by Cheapflights users on 4/18. 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.
sáb. 10/38:30 pm
IAD
-
LHR
1 stop18h 50m
Icelandair
sáb. 10/101:05 pm
LHR
-
IAD
1 stop11h 15m
Icelandair
Deal found 4/18$718
This CrystalTravel deal was found by Cheapflights users on 4/17. 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 CrystalTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 9/268:20 pm
IAD
-
LHR
1 stop16h 20m
Scandinavian Airlines
sáb. 10/106:40 am
LHR
-
IAD
1 stop15h 20m
Scandinavian Airlines
Deal found 4/17$720
This deal was found by Cheapflights users on 4/18. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 10/18:30 pm
IAD
-
LHR
1 stop10h 25m
Icelandair
jue. 10/81:05 pm
LHR
-
IAD
1 stop11h 15m
Icelandair
Deal found 4/18$723
This CrystalTravel deal was found by Cheapflights users on 4/18. 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 CrystalTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 10/18:30 pm
IAD
-
LHR
1 stop10h 25m
Icelandair
dom. 10/111:05 pm
LHR
-
IAD
1 stop14h 10m
Icelandair
Deal found 4/18$725
This Gotogate deal was found by Cheapflights users on 4/20. 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.
dom. 10/48:30 pm
IAD
-
LHR
1 stop10h 25m
Icelandair
lun. 10/121:05 pm
LHR
-
IAD
1 stop11h 15m
Icelandair
Deal found 4/20$726
This CrystalTravel deal was found by Cheapflights users on 4/20. 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 CrystalTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 9/268:20 pm
IAD
-
LHR
1 stop16h 20m
Scandinavian Airlines
jue. 10/110:20 am
LHR
-
IAD
1 stop11h 40m
Scandinavian Airlines
Deal found 4/20$727
This Gotogate deal was found by Cheapflights users on 4/19. 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.
vie. 10/98:30 pm
IAD
-
LHR
1 stop10h 25m
Icelandair
mar. 10/201:05 pm
LHR
-
IAD
1 stop11h 15m
Icelandair
Deal found 4/19$729

Cheapflights Fare Finder

 
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 2,558,603 searches. Data last updated abril 21, 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 round-trip

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

mié. 8/12

6:30 pm-6:55 am

Nonstop7h 25m

London Heathrow

mié. 8/19

6:50 am-1:30 pm

1 stop11h 40m

$853
Quickest round-trip

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

dom. 5/3

10:55 pm-11:20 am

Nonstop7h 25m

London Heathrow

mar. 5/12

5:55 pm-8:55 pm

Nonstop8h 00m

$882

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

jue. 9/10

10:55 pm-11:20 am

Nonstop7h 25m

London Heathrow

mié. 9/16

9:55 am-3:35 pm

1 stop10h 40m

$903

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

jue. 10/8

6:35 pm-6:55 am

Nonstop7h 20m

London Heathrow

mar. 10/13

6:50 am-2:20 pm

1 stop12h 30m

$903

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

jue. 8/20

8:20 pm-4:25 pm

2 stops15h 05m

London Heathrow

mié. 8/26

7:50 pm-7:16 pm

2 stops28h 26m

$915

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

mar. 5/19

9:50 pm-10:40 am

Nonstop7h 50m

London Heathrow

jue. 5/28

6:50 am-2:20 pm

1 stop12h 30m

$954

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

sáb. 8/22

8:20 pm-6:30 pm

1 stop17h 10m

London Heathrow

lun. 8/31

7:05 am-5:00 pm

2 stops14h 55m

$959

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

jue. 5/14

9:50 pm-10:40 am

Nonstop7h 50m

London Heathrow

mar. 5/19

6:50 am-2:20 pm

1 stop12h 30m

$964

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

mar. 8/11

10:55 pm-11:20 am

Nonstop7h 25m

London Heathrow

dom. 8/16

5:55 pm-8:55 pm

Nonstop8h 00m

$980

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

vie. 5/15

6:00 am-8:40 pm

1 stop9h 40m

London Heathrow

vie. 5/22

12:15 pm-3:30 pm

Nonstop8h 15m

$997

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/16

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

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 April.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*2 stars
OvagoPrice Accuracy2 starsTrust Score*3 stars
JustAirTicketPrice Accuracy-Trust Score*1 star
Justfly.comPrice Accuracy3 starsTrust Score*3 stars
CheapflightsfaresPrice Accuracy2 starsTrust Score*2 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
CheapTicketsDealPrice Accuracy3 starsTrust Score*3 stars
MytripPrice 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
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?

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 April 17, 2026.

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 63 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, 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 $681). Flying from Washington, D.C. Dulles Intl Airport to London Heathrow Airport in June is currently the most expensive (average of $1,084). 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 abril 21, 2026.

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 50% on the cost of your flight, compared to a flight at noon.

How much does it cost to fly round-trip 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 abril 21, 2026.
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
687 reviews

Crew

8.1

Food

6.9

Comfort

7.3

Overall

7.5

Entertainment

7.5

Boarding

7.7

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
687 reviews
Virgin Atlantic
7.5
Good
687 reviews

Crew

8.1

Food

6.9

Comfort

7.3

Overall

7.5

Entertainment

7.5

Boarding

7.7

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
9,622 reviews
Virgin Atlantic
7.5
Good
687 reviews

Crew

8.1

Food

6.9

Comfort

7.3

Overall

7.5

Entertainment

7.5

Boarding

7.7

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
7.1
Good
11,646 reviews
Virgin Atlantic
7.5
Good
687 reviews

Crew

8.1

Food

6.9

Comfort

7.3

Overall

7.5

Entertainment

7.5

Boarding

7.7

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
7.0
Good
639 reviews
Virgin Atlantic
7.5
Good
687 reviews

Crew

8.1

Food

6.9

Comfort

7.3

Overall

7.5

Entertainment

7.5

Boarding

7.7

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
7,905 reviews
Virgin Atlantic
7.5
Good
687 reviews

Crew

8.1

Food

6.9

Comfort

7.3

Overall

7.5

Entertainment

7.5

Boarding

7.7

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

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 25m. Fly via United Airlines, Delta, or KLM to get the fastest option. The distance between Washington, D.C. Dulles Intl Airport and London Heathrow Airport is about 3664 mi. Most flights are nonstop.

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

    Icelandair, at $398, 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 TAP AIR PORTUGAL and Scandinavian Airlines. Icelandair is priced at 49% 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 $202 on Icelandair. Other airlines that offer cheap prices include TAP AIR PORTUGAL from $222 and SWISS from $280 one-way.

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

    Consider United Airlines (89%), Delta (85%) or Virgin Atlantic (85%) 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 $2,290 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 $711.

  • 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, 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 $681). Flying from Washington, D.C. Dulles Intl Airport to London Heathrow Airport in June is currently the most expensive (average of $1,084). 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
Hounslow
Winchester
Croydon
Gatwick
Southend-on-Sea
Harrow
Eastleigh
Dartford
Dover
Orpington
Watford
Northampton
Borehamwood
Broadway
Chipping Norton
Hayes
Kingston upon Thames
Eastbourne
Slough

Browse thousands of different options on Cheapflights for your next trip

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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 2,558,603 searches. Data last updated abril 21, 2026.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$398Average$578FlexibilityNo cancel feeOn-time76%
TAP AIR PORTUGALCheapest$411Average$550FlexibilityNo cancel feeOn-timeN/A
Scandinavian AirlinesCheapest$454Average$710FlexibilityNo cancel feeOn-time77%
DeltaCheapest$530Average$858FlexibilityNo cancel feeOn-timeN/A
British AirwaysCheapest$532Average$745FlexibilityNo cancel feeOn-time70%
Virgin AtlanticCheapest$540Average$829FlexibilityNo cancel feeOn-time72%
United AirlinesCheapest$558Average$866FlexibilityNo cancel feeOn-time69%
Aer LingusCheapest$561Average$782FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$562Average$805FlexibilityNo cancel feeOn-time71%
IberiaCheapest$565Average$770FlexibilityNo cancel feeOn-time77%

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