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$331+ 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 5/3. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — LHR
Mar 13 — Mar 201
Fri 3/13
Fri 3/20
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

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

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Cheapflights Tip: The best prices from Washington, D.C. Dulles Intl to London Heathrow are usually found in August or October, booked 45 days in advance, depart on a Wednesday or Tuesday and return on a Thursday

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 February 11, 2026.

This oojo deal was found by Cheapflights users on 2/9. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/18:30 pm
IAD
-
LHR
1 stop10h 25m
Icelandair
Sat 5/99:25 pm
LHR
-
IAD
1 stop29h 50m
Icelandair
Deal found 2/9$537
This oojo deal was found by Cheapflights users on 2/9. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/1810:30 pm
IAD
-
LHR
1 stop19h 10m
TAP AIR PORTUGAL
Thu 2/266:00 am
LHR
-
IAD
1 stop14h 15m
TAP AIR PORTUGAL
Deal found 2/9$539
This FlightHub deal was found by Cheapflights users on 2/8. 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 5/28:30 pm
IAD
-
LHR
1 stop10h 25m
Icelandair
Tue 5/129:25 pm
LHR
-
IAD
1 stop29h 50m
Icelandair
Deal found 2/8$541
This FlightHub deal was found by Cheapflights users on 2/10. 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.
Mon 4/206:50 pm
IAD
-
LHR
2 stops33h 45m
Scandinavian Airlines
Thu 4/236:40 am
LHR
-
IAD
1 stop15h 10m
Scandinavian Airlines
Deal found 2/10$544
This Kiwi.com deal was found by Cheapflights users on 2/9. 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.
Tue 4/148:30 pm
IAD
-
LHR
1 stop18h 50m
Icelandair
Mon 4/201:05 pm
LHR
-
IAD
1 stop11h 15m
Icelandair
Deal found 2/9$545
This KAYAK deal was found by Cheapflights users on 2/10. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/88:30 pm
IAD
-
LHR
1 stop10h 25m
Icelandair
Tue 4/211:05 pm
LHR
-
IAD
1 stop11h 15m
Icelandair
Deal found 2/10$546
This Kiwi.com deal was found by Cheapflights users on 2/9. 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.
Wed 4/158:30 pm
IAD
-
LHR
1 stop10h 25m
Icelandair
Mon 4/201:05 pm
LHR
-
IAD
1 stop11h 15m
Icelandair
Deal found 2/9$547
This KAYAK deal was found by Cheapflights users on 2/7. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/128:30 pm
IAD
-
LHR
1 stop10h 25m
Icelandair
Fri 4/179:25 pm
LHR
-
IAD
1 stop26h 55m
Icelandair
Deal found 2/7$548
This Kiwi.com deal was found by Cheapflights users on 2/9. 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.
Thu 4/238:30 pm
IAD
-
LHR
1 stop10h 25m
Icelandair
Wed 4/299:25 pm
LHR
-
IAD
1 stop26h 55m
Icelandair
Deal found 2/9$549
This Kiwi.com deal was found by Cheapflights users on 2/11. 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.
Sat 4/188:30 pm
IAD
-
LHR
1 stop18h 50m
Icelandair
Wed 5/131:05 pm
LHR
-
IAD
1 stop14h 10m
Icelandair
Deal found 2/11$550
This oojo deal was found by Cheapflights users on 2/7. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/28:30 pm
IAD
-
LHR
1 stop10h 25m
Icelandair
Sat 5/99:25 pm
LHR
-
IAD
1 stop26h 55m
Icelandair
Deal found 2/7$551
This Mytrip deal was found by Cheapflights users on 2/9. 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.
Mon 2/237:40 pm
IAD
-
LHR
1 stop10h 10m
Icelandair
Tue 3/312:15 pm
LHR
-
IAD
1 stop11h 15m
Icelandair
Deal found 2/9$552

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 February 11, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$537
(oojo)

One-way from

$331
(oojo)

Popular in

June

Cheapest in

August

Average price

$709

Good round-trip deal

$660 or less

Good one-way deal

$370 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. 13% potential increase in price ($120 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($23 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 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 February 11, 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

Dulles Intl

Fly to

Heathrow

Route

Depart

Return

Price

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Sat 4/25

8:20 pm-6:50 pm

2 stops17h 30m

London Heathrow

Tue 5/12

9:05 pm-4:50 pm

2 stops24h 45m

$613

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Thu 3/19

7:20 pm-6:40 am

Nonstop7h 20m

London Heathrow

Tue 3/31

7:25 am-7:25 pm

1 stop17h 00m

$617

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Sun 2/22

10:20 pm-10:40 am

Nonstop7h 20m

London Heathrow

Tue 3/3

8:40 am-4:05 pm

1 stop12h 25m

$618

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Wed 3/18

11:20 pm-10:40 am

Nonstop7h 20m

London Heathrow

Thu 3/26

10:00 am-5:05 pm

1 stop11h 05m

$618

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Tue 3/24

11:15 pm-10:50 am

Nonstop7h 35m

London Heathrow

Tue 3/31

7:25 am-7:25 pm

1 stop17h 00m

$618

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Mon 3/2

10:15 pm-10:50 am

Nonstop7h 35m

London Heathrow

Mon 3/9

1:45 pm-5:40 pm

1 stop31h 55m

$618

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Tue 3/10

11:20 pm-10:40 am

Nonstop7h 20m

London Heathrow

Thu 3/26

10:00 am-5:05 pm

1 stop11h 05m

$619

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Sun 3/8

6:00 am-9:20 pm

1 stop11h 20m

London Heathrow

Tue 3/17

9:00 am-5:40 pm

1 stop12h 40m

$622

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Wed 3/11

10:40 pm-1:45 pm

1 stop11h 05m

London Heathrow

Thu 3/19

8:40 am-5:05 pm

1 stop12h 25m

$623

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Fri 4/24

8:20 pm-4:25 pm

2 stops15h 05m

London Heathrow

Sat 5/2

6:40 am-4:50 pm

2 stops15h 10m

$627

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/8

Showing 1-10 of 22 results
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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 February.
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
CheapflightsfaresPrice Accuracy2 starsTrust Score*2 stars
Justfly.comPrice Accuracy3 starsTrust Score*3 stars
JustAirTicketPrice Accuracy-Trust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
CheapTicketsDealPrice Accuracy3 starsTrust Score*3 stars
oojoPrice Accuracy3 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 February 6, 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 45 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 $434). Flying from Washington, D.C. Dulles Intl Airport to London Heathrow Airport in June is currently the most expensive (average of $726). 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 February 11, 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.

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 February 11, 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, and American Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Virgin Atlantic
7.5
Good
678 reviews

Food

6.9

Overall

7.5

Boarding

7.7

Entertainment

7.6

Comfort

7.3

Crew

8.2

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
678 reviews
Virgin Atlantic
7.5
Good
678 reviews

Food

6.9

Overall

7.5

Boarding

7.7

Entertainment

7.6

Comfort

7.3

Crew

8.2

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
9,274 reviews
Virgin Atlantic
7.5
Good
678 reviews

Food

6.9

Overall

7.5

Boarding

7.7

Entertainment

7.6

Comfort

7.3

Crew

8.2

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
7.2
Good
11,266 reviews
Virgin Atlantic
7.5
Good
678 reviews

Food

6.9

Overall

7.5

Boarding

7.7

Entertainment

7.6

Comfort

7.3

Crew

8.2

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!
Iberia
7.0
Good
3,112 reviews
Virgin Atlantic
7.5
Good
678 reviews

Food

6.9

Overall

7.5

Boarding

7.7

Entertainment

7.6

Comfort

7.3

Crew

8.2

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
7,728 reviews
Virgin Atlantic
7.5
Good
678 reviews

Food

6.9

Overall

7.5

Boarding

7.7

Entertainment

7.6

Comfort

7.3

Crew

8.2

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 20m. Fly via Scandinavian Airlines, United Airlines, or Delta 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 Air France. TAP AIR PORTUGAL is priced at 45% 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 $191 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 American Airlines (83%), Aer Lingus (83%) or Finnair (83%) 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 $2,253 for a flight from Washington, D.C. Dulles Intl Airport to London Heathrow Airport. The cheapest flight overall is $258 while the most popular route, (Washington, D.C. Dulles Intl - London Heathrow) is currently priced at $426.

  • Where are the most common layover locations when flying from Washington, D.C. Dulles Intl Airport to London Heathrow Airport?

    Most of the time, Washington, D.C. Dulles Intl Airport to London Heathrow Airport flights that have layovers will stop in Reykjavik.

  • What are some popular things to do or see while on a layover in Reykjavik?

    Hallgrímskirkja, Harpa, and Laugardalslaug Geothermal Pool are the most popular attractions in Reykjavik if you're in need of something to do during your layover. Hallgrímskirkja, Harpa and Laugardalslaug Geothermal Pool are located about 23.2 mi, 23.3 mi, and 24.6 mi, respectively from Reykjavik Keflavik Intl if you are interested in checking them out. Travelers can book a car rental at Reykjavik Keflavik Intl for about $54 per day to make their sightseeing more efficient.

  • Where are the least popular layover locations for Washington, D.C. Dulles Intl Airport to London Heathrow Airport flights?

    Flights departing from Washington, D.C. Dulles Intl Airport and landing in London Heathrow Airport layover in Dublin least frequently.

  • 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 $434). Flying from Washington, D.C. Dulles Intl Airport to London Heathrow Airport in June is currently the most expensive (average of $726). 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
Croydon
Hounslow
Southend-on-Sea
Harrow
Eastleigh
Gatwick
Dartford
Dover
Winchester
Orpington
Northampton
Watford
Hayes
Borehamwood
Broadway
Aylesbury
Chipping Norton
Horley
Kingston upon Thames

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 February 11, 2026.
AirlineCheapestAverageFlexibilityOn-time
TAP AIR PORTUGALCheapest$411Average$550FlexibilityNo cancel feeOn-timeN/A
IcelandairCheapest$415Average$584FlexibilityNo cancel feeOn-time76%
Air FranceCheapest$442Average$868FlexibilityNo cancel feeOn-time77%
LufthansaCheapest$447Average$1,138FlexibilityNo cancel feeOn-time76%
Scandinavian AirlinesCheapest$454Average$597FlexibilityNo cancel feeOn-time77%
KLMCheapest$488Average$647FlexibilityNo cancel feeOn-time75%
DeltaCheapest$516Average$788FlexibilityNo cancel feeOn-timeN/A
British AirwaysCheapest$541Average$748FlexibilityNo cancel feeOn-time70%
Air CanadaCheapest$549Average$761FlexibilityNo cancel feeOn-time67%
Virgin AtlanticCheapest$554Average$792FlexibilityNo cancel feeOn-time72%

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