HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Heathrow

$272+ Cheap flights from Dulles Intl (IAD) to Heathrow (LHR)

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 10/1. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — LHR
Aug 1 — Aug 81
Sat 8/1
Sat 8/8
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Dulles Intl to Heathrow with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.
Cheapflights Tip: The best prices from Washington, D.C. Dulles Intl to London Heathrow are usually found in November or February, booked 63 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
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 July 2, 2026.

This Scandinavian Airlines deal was found by Cheapflights users on 7/1. 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 Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/168:30 pm
IAD
-
LHR
1 stop31h 50m
Scandinavian Airlines
Thu 11/196:40 am
LHR
-
IAD
2 stops15h 35m
Scandinavian Airlines
Deal found 7/1$671
This FlightHub deal was found by Cheapflights users on 7/1. 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.
Wed 9/238:30 pm
IAD
-
LHR
1 stop10h 25m
Icelandair
Fri 10/21:05 pm
LHR
-
IAD
1 stop11h 15m
Icelandair
Deal found 7/1$672
This FlightHub deal was found by Cheapflights users on 7/2. 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.
Sat 9/268:30 pm
IAD
-
LHR
1 stop10h 25m
Icelandair
Wed 9/309:25 pm
LHR
-
IAD
1 stop26h 55m
Icelandair
Deal found 7/2$673
This Scandinavian Airlines deal was found by Cheapflights users on 7/1. 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 Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/312:25 pm
IAD
-
LHR
2 stops22h 35m
Scandinavian Airlines
Mon 10/56:40 am
LHR
-
IAD
2 stops15h 20m
Scandinavian Airlines
Deal found 7/1$677
This Mytrip deal was found by Cheapflights users on 7/1. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/93:45 pm
IAD
-
LHR
2 stops14h 25m
Multiple Airlines
Sun 8/1610:00 pm
LHR
-
IAD
2 stops27h 24m
Multiple Airlines
Deal found 7/1$679
This Mytrip deal was found by Cheapflights users on 7/2. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/68:30 pm
IAD
-
LHR
2 stops14h 30m
Multiple Airlines
Wed 9/167:40 am
LHR
-
IAD
2 stops16h 40m
Multiple Airlines
Deal found 7/2$682
This Mytrip deal was found by Cheapflights users on 7/2. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/258:30 pm
IAD
-
LHR
2 stops15h 50m
Multiple Airlines
Sun 10/48:50 am
LHR
-
IAD
2 stops18h 25m
Multiple Airlines
Deal found 7/2$684
This Mytrip deal was found by Cheapflights users on 6/30. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/24:20 pm
IAD
-
LHR
2 stops13h 50m
Multiple Airlines
Mon 8/109:10 pm
LHR
-
IAD
2 stops26h 51m
Multiple Airlines
Deal found 6/30$685
This Kiwi.com deal was found by Cheapflights users on 7/2. 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.
Fri 10/238:30 pm
IAD
-
LHR
1 stop10h 25m
Icelandair
Sat 11/1412:15 pm
LHR
-
IAD
1 stop11h 15m
Icelandair
Deal found 7/2$686
This Icelandair deal was found by Cheapflights users on 6/29. 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 Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/38:30 pm
IAD
-
LHR
1 stop10h 25m
Icelandair
Fri 10/91:05 pm
LHR
-
IAD
1 stop11h 15m
Icelandair
Deal found 6/29$687
This Icelandair deal was found by Cheapflights users on 6/29. 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 Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/38:30 pm
IAD
-
LHR
1 stop10h 25m
Icelandair
Wed 10/79:25 pm
LHR
-
IAD
1 stop26h 55m
Icelandair
Deal found 6/29$688
This Icelandair deal was found by Cheapflights users on 7/1. 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 Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/411:20 pm
IAD
-
LHR
1 stop31h 35m
Icelandair
Tue 10/131:05 pm
LHR
-
IAD
1 stop11h 15m
Icelandair
Deal found 7/1$689

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 July 2, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$671
(Scandinavian Airlines)

One-way from

$272
(oojo)

Popular in

June

Cheapest in

November

Average price

$1,005

Good round-trip deal

$989 or less

Good one-way deal

$454 or less
Provider with most accurate pricing for Washington, D.C. Dulles Intl-London Heathrow flight deals.
Search Deals
Provider most trusted by Cheapflights users for Washington, D.C. Dulles Intl-London Heathrow flights.
Search Deals
From Washington, D.C. Dulles Intl to London Heathrow
Search Deals
One-way flight from Washington, D.C. Dulles Intl to London Heathrow
Search Deals
Highest demand for flights based on searches. 23% potential increase in price ($250 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($44 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 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

 
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 July 2, 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

Mon 11/16

5:25 pm-8:05 am

1 stop33h 40m

London Heathrow

Thu 11/19

6:50 am-2:30 pm

1 stop12h 40m

$735

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Tue 9/29

12:25 pm-4:25 pm

2 stops23h 00m

London Heathrow

Tue 10/6

6:40 pm-5:00 pm

1 stop27h 20m

$844

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Wed 10/14

10:55 pm-11:20 am

Nonstop7h 25m

London Heathrow

Tue 10/27

6:30 am-4:45 pm

1 stop14h 15m

$848

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Tue 10/20

10:55 pm-11:20 am

Nonstop7h 25m

London Heathrow

Thu 10/29

8:40 am-4:45 pm

1 stop12h 05m

$848

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Thu 11/5

8:30 pm-4:25 pm

2 stops14h 55m

London Heathrow

Sun 11/8

7:50 pm-5:15 pm

2 stops26h 25m

$870

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Tue 9/29

10:25 pm-10:50 am

Nonstop7h 25m

London Heathrow

Tue 10/6

5:05 pm-8:20 pm

Nonstop8h 15m

$876

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Wed 8/5

6:30 pm-6:55 am

Nonstop7h 25m

London Heathrow

Wed 8/19

6:50 am-1:30 pm

1 stop11h 40m

$918
Quickest round-trip

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Wed 9/23

10:55 pm-11:20 am

Nonstop7h 25m

London Heathrow

Mon 9/28

5:55 pm-9:05 pm

Nonstop8h 10m

$927

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Wed 7/29

10:15 pm-10:40 am

Nonstop7h 25m

London Heathrow

Wed 8/12

8:40 am-4:45 pm

1 stop13h 05m

$953

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Tue 11/17

6:20 pm-6:40 am

Nonstop7h 20m

London Heathrow

Mon 11/30

4:20 pm-8:15 pm

Nonstop8h 55m

$966

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/27

Showing 1-10 of 23 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 July.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice Accuracy3 starsTrust Score*3 stars
JustAirTicketPrice Accuracy-Trust Score*1 star
Justfly.comPrice Accuracy3 starsTrust Score*3 stars
CheapflightsfaresPrice Accuracy2 starsTrust Score*1 star
eDreamsPrice Accuracy2 starsTrust Score*3 stars
MytripPrice Accuracy2 starsTrust Score*3 stars
BusinessClassPrice Accuracy-Trust 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?

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 62 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, November is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to London Heathrow Airport (average of $689). Flying from Washington, D.C. Dulles Intl Airport to London Heathrow Airport in June is currently the most expensive (average of $1,302). 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 July 2, 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?

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

AI-powered summary based on content written by travel experts. AI can make mistakes.
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

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 July 2, 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
689 reviews

Crew

8.1

Overall

7.5

Boarding

7.7

Comfort

7.3

Food

6.9

Entertainment

7.5

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
689 reviews
Virgin Atlantic
7.5
Good
689 reviews

Crew

8.1

Overall

7.5

Boarding

7.7

Comfort

7.3

Food

6.9

Entertainment

7.5

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
9,925 reviews
Virgin Atlantic
7.5
Good
689 reviews

Crew

8.1

Overall

7.5

Boarding

7.7

Comfort

7.3

Food

6.9

Entertainment

7.5

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
11,771 reviews
Virgin Atlantic
7.5
Good
689 reviews

Crew

8.1

Overall

7.5

Boarding

7.7

Comfort

7.3

Food

6.9

Entertainment

7.5

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
695 reviews
Virgin Atlantic
7.5
Good
689 reviews

Crew

8.1

Overall

7.5

Boarding

7.7

Comfort

7.3

Food

6.9

Entertainment

7.5

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
8,087 reviews
Virgin Atlantic
7.5
Good
689 reviews

Crew

8.1

Overall

7.5

Boarding

7.7

Comfort

7.3

Food

6.9

Entertainment

7.5

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, Scandinavian Airlines, or KLM 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 $411, 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 Icelandair and Delta. TAP AIR PORTUGAL is priced at 50% 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 $222 on TAP AIR PORTUGAL. Other airlines that offer cheap prices include Icelandair from $228 and Iberia from $317 one-way.

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

    Consider KLM (80%), Air France (80%) or Delta (80%) 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 $4,181 for a flight from Washington, D.C. Dulles Intl Airport to London Heathrow Airport. The cheapest flight overall is $324 while the most popular route, (Washington, D.C. Dulles Intl - London Heathrow) is currently priced at $606.

  • 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, November is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to London Heathrow Airport (average of $689). Flying from Washington, D.C. Dulles Intl Airport to London Heathrow Airport in June is currently the most expensive (average of $1,302). 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
Hounslow
Winchester
Croydon
Gatwick
Southend-on-Sea
Wembley
Harrow
Eastleigh
Dartford
Dover
Orpington
Watford
Northampton
Chipping Norton
Hayes
Kingston upon Thames
Eastbourne
Slough

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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 July 2, 2026.
AirlineCheapestAverageFlexibilityOn-time
TAP AIR PORTUGALCheapest$411Average$580FlexibilityNo cancel feeOn-timeN/A
IcelandairCheapest$489Average$726FlexibilityNo cancel feeOn-time76%
DeltaCheapest$530Average$882FlexibilityNo cancel feeOn-timeN/A
British AirwaysCheapest$538Average$811FlexibilityNo cancel feeOn-time70%
American AirlinesCheapest$547Average$846FlexibilityNo cancel feeOn-time71%
Virgin AtlanticCheapest$550Average$880FlexibilityNo cancel feeOn-time72%
Scandinavian AirlinesCheapest$560Average$787FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$563Average$887FlexibilityNo cancel feeOn-time69%
IberiaCheapest$575Average$749FlexibilityNo cancel feeOn-time77%
FinnairCheapest$580Average$738FlexibilityNo cancel feeOn-time76%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.