What’s the top layover airport for flights from London Heathrow Airport to Washington, D.C. Dulles Intl Airport?

Reykjavik (KEF) – chosen by Cheapflights users on 44% of 1-stop itineraries from London Heathrow Airport to Washington, D.C. Dulles Intl Airport on Cheapflights.

What day of the week experiences the fewest flight delays on this route?

Tuesday tends to have the lowest number of delays on this route, whereas Thursday has historically faced a higher average of delays compared to other days of the week.

How often are flights from London to Washington, D.C. delayed?

About 18% of weekly flights between London and Washington, D.C. have experienced delays in the past year, with the average delay time being 136 minutes.

What’s the fastest layover option from London Heathrow Airport to Washington, D.C. Dulles Intl Airport?

Flights via Dublin (DUB) have the shortest average one-way travel time for 1-stop routes: 11h 00m.

What’s the cheapest layover airport for flights from London Heathrow Airport to Washington, D.C. Dulles Intl Airport?

Lisbon (LIS) is the most affordable 1-stop option, with an average round-trip price of $546.

What is the most punctual flight time for London to Washington, D.C. flights?

Historically, flights departing in the early afternoon are less likely to be delayed, whereas flights leaving in the morning tend to experience delays more often.

Which airport typically offers the quickest layover for flights from London Heathrow Airport to Washington, D.C. Dulles Intl Airport?

Flights via Reykjavik (KEF) offer the fastest connection on this route, with an average layover time of 1h 21m.

Which airline has the best punctuality record on London to Washington, D.C. flights?

Over the last year, Air Canada have had the lowest number of delays on this route, with just 12% of flights being delayed.

What are the cheapest airlines to fly from London Heathrow Airport to Washington, D.C. Dulles Intl Airport one-way?

One-way options have recently been found by users for as low as $538 on SWISS. Other airlines that offer cheap prices include Austrian Airlines from $540 and United Airlines from $550 one-way.

Weekly flight availability from London Heathrow Airport to Washington, D.C. Dulles Intl Airport

The most flights from LHR to IAD are scheduled on a Monday (26 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (20 on average).

In terms of precipitation, rainfall in Washington, D.C. Dulles Intl Airport ranges from 2.6 - 4.0 inches per month. May is typically the wettest month, when rainfall can reach 4.0 in. February is typically the driest time to visit Washington, D.C. Dulles Intl Airport when rainfall is around 2.6 in.

If weather is an important factor for your trip to Washington, D.C. Dulles Intl Airport, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 35.6 F).

What are the most popular airlines that fly from London Heathrow Airport to Washington, D.C. Dulles Intl Airport?

When booking a flight from London Heathrow Airport to Washington, D.C. Dulles Intl Airport, you may want to consider flying on British Airways, United Airlines or Virgin Atlantic as they are the most popular for this route.

Most accurate provider : When it comes to deals on London Heathrow Airport-Washington, D.C. Dulles Intl Airport flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on London Heathrow Airport-Washington, D.C. Dulles Intl Airport flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from London Heathrow Airport-Washington, D.C. Dulles Intl Airport flight searches over the past month and is updated monthly.

Most trusted provider : When it comes to deals on London Heathrow Airport-Washington, D.C. Dulles Intl 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 London Heathrow Airport-Washington, D.C. Dulles Intl Airport flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Can I find deals for flights from Heathrow to Dulles Intl that include hotel bookings?

Yes. In addition to deals on Heathrow to Dulles Intl flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from Heathrow to Dulles Intl?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Heathrow to Dulles Intl.

Can I find deals for business class flights from Heathrow to Dulles Intl?

Yes. Cheapflights offers flight deals from Heathrow to Dulles Intl by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

$495+ Cheap Flights from London Heathrow Airport to Washington, D.C. Dulles Intl Airport

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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

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Cheapflights Tip: The best prices from London Heathrow to Washington, D.C. Dulles Intl are usually found in September or February, booked 65 days in advance, depart on a Thursday or Wednesday and return on a Wednesday

Cheap flight deals from Heathrow to Dulles Intl

Most accurate provider	FlightHub 3 stars
Most trusted provider	FlightHub 3 stars
Round-trip from	$543 (Justfly.com)
One-way from	$495 (Kiwi.com)
Popular in	July
Cheapest in	September
Average price	$773
Good round-trip deal	$755 or less
Good one-way deal	$686 or less

Provider with most accurate pricing for London Heathrow-Washington, D.C. Dulles Intl flight deals.

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Provider most trusted by Cheapflights users for London Heathrow-Washington, D.C. Dulles Intl flights.

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From London Heathrow to Washington, D.C. Dulles Intl

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One-way flight from London Heathrow to Washington, D.C. Dulles Intl

Search Deals

Highest demand for flights based on searches. 12% potential increase in price ($108 potential increase over avg. RT price).

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Cheapest flight prices on average. 1% potential price decrease ($15 potential savings vs. average RT price).

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Average for round-trip flights in October 2025

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Price to beat on a round-trip flight from London Heathrow to Washington, D.C. Dulles Intl.

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Price to beat on a one-way flight from London Heathrow to Washington, D.C. Dulles Intl.

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Find flight deals from Heathrow to Dulles Intl

Cheapest flights from Heathrow to Dulles Intl
Explore the most affordable flight options available from Heathrow to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 27, 2025.

Sun 12/78:15 amLHR - IAD

1 stop17h 45mTAP AIR PORTUGAL

Fri 12/1210:30 pmIAD - LHR

1 stop14h 00mTAP AIR PORTUGAL

Deal found 10/27

$543

Fri 12/1212:25 pmLHR - IAD

1 stop13h 35mTAP AIR PORTUGAL

Sat 1/245:30 pmIAD - LHR

1 stop12h 55mTAP AIR PORTUGAL

Deal found 10/27

$545

Thu 12/46:00 amLHR - IAD

1 stop14h 15mTAP AIR PORTUGAL

Fri 12/1210:30 pmIAD - LHR

1 stop19h 10mTAP AIR PORTUGAL

Deal found 10/27

$561

Sun 12/147:55 pmLHR - IAD

1 stop24h 20mTAP AIR PORTUGAL

Wed 1/1410:30 pmIAD - LHR

1 stop12h 00mTAP AIR PORTUGAL

Deal found 10/26

$591

Mon 12/156:00 amLHR - IAD

1 stop14h 15mTAP AIR PORTUGAL

Sun 1/2510:30 pmIAD - LHR

1 stop14h 00mTAP AIR PORTUGAL

Deal found 10/27

$592

Tue 12/26:30 pmLHR - IAD

1 stop31h 30mTAP AIR PORTUGAL

Sat 1/105:30 pmIAD - LHR

1 stop23h 05mTAP AIR PORTUGAL

Deal found 10/25

$599

Thu 11/276:40 amLHR - IAD

1 stop15h 35mScandinavian Airlines

Wed 12/38:30 pmIAD - LHR

1 stop14h 30mScandinavian Airlines

Deal found 10/25

$600

Thu 12/46:40 amLHR - IAD

2 stops15h 35mScandinavian Airlines

Wed 12/108:30 pmIAD - LHR

2 stops14h 55mScandinavian Airlines

Deal found 10/27

$613

Best flights from Heathrow to Dulles Intl
Discover carefully curated flight deals from Heathrow to Dulles Intl that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 27, 2025.

Tue 12/27:50 pmLHR - IAD

2 stops26h 25mScandinavian Airlines

Sat 1/108:30 pmIAD - LHR

2 stops17h 20mScandinavian Airlines

Deal found 10/25

$650

Tue 11/258:40 amLHR - IAD

1 stop12h 25mVirgin Atlantic

Tue 12/25:03 pmIAD - LHR

1 stop10h 42mVirgin Atlantic

Deal found 10/27

$660

Sun 12/146:30 amLHR - IAD

1 stop14h 35mDelta

Thu 12/256:00 amIAD - LHR

2 stops19h 50mDelta

Deal found 10/25

$661

Mon 12/294:50 pmLHR - IAD

Nonstop8h 40mMultiple Airlines

Fri 3/137:59 pmIAD - LHR

1 stop10h 16mMultiple Airlines

Deal found 10/27

$679

Thu 12/256:40 amLHR - IAD

1 stop15h 35mScandinavian Airlines

Wed 12/318:30 pmIAD - LHR

1 stop17h 00mScandinavian Airlines

Deal found 10/25

$654

Thu 11/2710:00 amLHR - IAD

1 stop11h 05mVirgin Atlantic

Wed 12/37:35 pmIAD - LHR

1 stop11h 05mVirgin Atlantic

Deal found 10/25

$661

Tue 12/168:40 amLHR - IAD

1 stop12h 25mDelta

Wed 12/2412:58 pmIAD - LHR

1 stop15h 02mDelta

Deal found 10/25

$664

Thu 3/197:05 amLHR - IAD

2 stops15h 10mScandinavian Airlines

Wed 4/18:20 pmIAD - LHR

1 stop14h 40mScandinavian Airlines

Deal found 10/26

$666

Wed 11/264:50 pmLHR - IAD

Nonstop8h 40mVirgin Atlantic

Wed 12/310:20 pmIAD - LHR

Nonstop7h 30mVirgin Atlantic

Deal found 10/26

$677

Thu 11/274:50 pmLHR - IAD

Nonstop8h 40mDelta

Wed 12/310:20 pmIAD - LHR

Nonstop7h 30mDelta

Deal found 10/27

$677

Fri 12/264:50 pmLHR - IAD

Nonstop8h 40mDelta

Tue 12/3010:20 pmIAD - LHR

Nonstop7h 30mDelta

Deal found 10/25

$680

Last-minute flights from Heathrow to Dulles Intl
Discover last-minute flight deals from Heathrow to Dulles Intl. Data last updated October 27, 2025 and is based on user searches.

Fri 11/78:35 pmLHR - IAD

1 stop26h 55mIcelandair

Fri 11/147:40 pmIAD - LHR

1 stop10h 10mIcelandair

Deal found 10/24

$622

Sat 11/226:30 amLHR - IAD

1 stop14h 35mVirgin Atlantic

Sat 11/2910:20 pmIAD - LHR

Nonstop7h 30mVirgin Atlantic

Deal found 10/24

$620

Mon 11/246:00 amLHR - IAD

1 stop14h 15mTAP AIR PORTUGAL

Thu 12/115:30 pmIAD - LHR

1 stop24h 10mTAP AIR PORTUGAL

Deal found 10/26

$616

Tue 11/255:30 pmLHR - IAD

2 stops52h 45mScandinavian Airlines

Mon 12/18:30 pmIAD - LHR

1 stop20h 10mScandinavian Airlines

Deal found 10/25

$623

Tue 11/258:55 amLHR - IAD

1 stop12h 40mVirgin Atlantic

Tue 12/210:20 pmIAD - LHR

Nonstop7h 30mVirgin Atlantic

Deal found 10/26

$625

Thu 11/276:40 amLHR - IAD

1 stop15h 35mScandinavian Airlines

Wed 12/38:30 pmIAD - LHR

1 stop14h 30mScandinavian Airlines

Deal found 10/25

$600

Thu 11/276:30 amLHR - IAD

1 stop14h 35mVirgin Atlantic

Wed 12/310:20 pmIAD - LHR

Nonstop7h 30mVirgin Atlantic

Deal found 10/26

$619

One-way flights from Heathrow to Dulles Intl
Search for one-way flight options from Heathrow to Dulles Intl. Find affordable one-way fares based on user searches. Data last updated October 27, 2025.

Sat 11/152:50 pmLHR - IAD

2 stops30h 44mMultiple Airlines

Deal found 10/25

$495

Tue 11/2512:15 pmLHR - IAD

3 stops37h 45mMultiple Airlines

Deal found 10/26

$499

Thu 12/42:50 pmLHR - IAD

2 stops30h 34mMultiple Airlines

Deal found 10/26

$500

Sun 3/13:30 pmLHR - IAD

3 stops28h 45mMultiple Airlines

Deal found 10/25

$503

Thu 11/208:15 amLHR - IAD

3 stops34h 50mMultiple Airlines

Deal found 10/25

$504

Tue 3/108:50 amLHR - IAD

2 stops15h 40mMultiple Airlines

Deal found 10/26

$506

Wed 12/108:35 pmLHR - IAD

1 stop26h 55mIcelandair

Deal found 10/26

$509

Tue 11/46:45 pmLHR - IAD

2 stops29h 00mMultiple Airlines

Deal found 10/26

$510

Sun 3/298:05 amLHR - IAD

2 stops36h 45mMultiple Airlines

Deal found 10/26

$512

Sun 11/233:15 pmLHR - IAD

3 stops52h 20mMultiple Airlines

Deal found 10/26

$513

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Tue 12/2

7:50 pm-5:15 pm

2 stops26h 25m

Washington, D.C. Dulles Intl

Sat 1/10

8:30 pm-6:50 pm

2 stops17h 20m

$650

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Thu 12/25

6:40 am-5:15 pm

1 stop15h 35m

Washington, D.C. Dulles Intl

Wed 12/31

8:30 pm-6:30 pm

1 stop17h 00m

$654

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Tue 11/25

8:40 am-4:05 pm

1 stop12h 25m

Washington, D.C. Dulles Intl

Tue 12/2

5:03 pm-8:45 am

1 stop10h 42m

$660

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Sun 12/14

6:30 am-4:05 pm

1 stop14h 35m

Washington, D.C. Dulles Intl

Thu 12/25

6:00 am-6:50 am

2 stops19h 50m

$661

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Thu 11/27

10:00 am-4:05 pm

1 stop11h 05m

Washington, D.C. Dulles Intl

Wed 12/3

7:35 pm-11:40 am

1 stop11h 05m

$661

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Tue 12/16

8:40 am-4:05 pm

1 stop12h 25m

Washington, D.C. Dulles Intl

Wed 12/24

12:58 pm-9:00 am

1 stop15h 02m

$664

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Thu 3/19

7:05 am-6:15 pm

2 stops15h 10m

Washington, D.C. Dulles Intl

Wed 4/1

8:20 pm-4:00 pm

1 stop14h 40m

$666

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Wed 11/26

4:50 pm-8:30 pm

Nonstop8h 40m

Washington, D.C. Dulles Intl

Wed 12/3

10:20 pm-10:50 am

Nonstop7h 30m

$677

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Thu 11/27

4:50 pm-8:30 pm

Nonstop8h 40m

Washington, D.C. Dulles Intl

Wed 12/3

10:20 pm-10:50 am

Nonstop7h 30m

$677

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Mon 12/29

4:50 pm-8:30 pm

Nonstop8h 40m

Washington, D.C. Dulles Intl

Fri 3/13

7:59 pm-10:15 am

1 stop10h 16m

$679

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/27

Showing 1-10 of 22 results

Compare providers for flights from Heathrow to Dulles Intl

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Heathrow to Dulles Intl in October.

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy2 stars	Trust Score*3 stars
eDreams	Price Accuracy3 stars	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*3 stars
Cheapflightsfares	Price Accuracy3 stars	Trust Score*1 star
AranGrant	Price Accuracy3 stars	Trust Score*3 stars
Thrive Travel	Price Accuracy3 stars	Trust Score*1 star
Gotogate	Price Accuracy2 stars	Trust Score*2 stars
Gurufare	Price Accuracy3 stars	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 London Heathrow Airport-Washington, D.C. Dulles Intl Airport flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on London Heathrow Airport-Washington, D.C. Dulles Intl Airport flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from London Heathrow Airport-Washington, D.C. Dulles Intl Airport flight searches over the past month and is updated monthly.
Most trusted provider: When it comes to deals on London Heathrow Airport-Washington, D.C. Dulles Intl 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 London Heathrow Airport-Washington, D.C. Dulles Intl 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 Heathrow to Dulles Intl

Have a flexible travel schedule? Discover the best time to fly to Dulles Intl from Heathrow 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 London Heathrow Airport to Washington, D.C. Dulles Intl Airport

Prices

Airlines

Delays

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

The best time to book flights from London Heathrow Airport to Washington, D.C. Dulles Intl Airport is 65 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from London Heathrow Airport to Washington, D.C. Dulles Intl Airport?

Currently, September is the cheapest month in which you can book a flight from London Heathrow Airport to Washington, D.C. Dulles Intl Airport (average of $508). Flying from London Heathrow Airport to Washington, D.C. Dulles Intl Airport in July is currently the most expensive (average of $719). 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 LHR to IAD?

When flying from London Heathrow Airport to Washington, D.C. Dulles Intl Airport, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 14% versus a flight in the morning.

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

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

Airlines

British Airways

BA's Club Suite offers private pods with a door, ensuring a more exclusive experience.

World Traveller Plus provides extra seat width and legroom, ideal for long-haul comfort.

Read more about British Airwaysby Gabriel Leigh

United Airlines

Polaris offers lie-flat seats with noise-reducing headphones and large entertainment screens for comfort.

United's Premium Plus seats provide extra legroom, upgraded meals, and two checked bags on international flights.

Read more about United Airlinesby Harriet Baskas

Airports

LHR

Expect long security lines at Heathrow. Ensure all liquids are in one small bag to avoid delays during manual screening.

IAD

Use the Silver Line Metro to reach downtown D.C. from IAD in under 40 minutes, a cost-effective transportation option.

Our travel experts

Gabriel Leigh

Expert on British Airways

Harriet Baskas

Expert on United Airlines

Ramsey Qubein

Expert on LHR and IAD

Reviews of airlines servicing Dulles Intl

See what other customers who have flown with Delta, Virgin Atlantic, and United Airlines from London Heathrow Airport to Washington, D.C. Dulles Intl Airport have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Delta

7.9

Good

7,994 reviews

Reviews

1 / 20

10.0

Excellent

Mary,Oct 2025

AMS - PDX

It's specail being able to fly non-stop from Amsterdam all the way home to Portland, Oregon!

Delta

7.9

Good

7,994 reviews

Delta

7.9

Good

7,994 reviews

Reviews

1 / 20

10.0

Excellent

Mary,Oct 2025

AMS - PDX

It's specail being able to fly non-stop from Amsterdam all the way home to Portland, Oregon!

Virgin Atlantic

7.5

Good

670 reviews

Delta

7.9

Good

7,994 reviews

Reviews

1 / 20

10.0

Excellent

Mary,Oct 2025

AMS - PDX

It's specail being able to fly non-stop from Amsterdam all the way home to Portland, Oregon!

United Airlines

7.4

Good

8,996 reviews

Delta

7.9

Good

7,994 reviews

Reviews

1 / 20

10.0

Excellent

Mary,Oct 2025

AMS - PDX

It's specail being able to fly non-stop from Amsterdam all the way home to Portland, Oregon!

Lufthansa

6.8

Okay

7,532 reviews

Delta

7.9

Good

7,994 reviews

Reviews

1 / 20

10.0

Excellent

Mary,Oct 2025

AMS - PDX

It's specail being able to fly non-stop from Amsterdam all the way home to Portland, Oregon!

British Airways

6.7

Okay

7,476 reviews

Delta

7.9

Good

7,994 reviews

Reviews

1 / 20

10.0

Excellent

Mary,Oct 2025

AMS - PDX

It's specail being able to fly non-stop from Amsterdam all the way home to Portland, Oregon!

Related info for your journey

How long is the flight from London Heathrow Airport to Washington, D.C. Dulles Intl Airport?
A quick flight from London Heathrow Airport to Washington, D.C. Dulles Intl Airport can take about 12h 25m. Scandinavian Airlines provides one of the quickest options available for as low as $660. The distance from London Heathrow Airport to Washington, D.C. Dulles Intl Airport is about 3664 mi. Both multi-stop and nonstop flights can be found to your destination and back.
What are the cheapest airlines flying from London Heathrow Airport to Washington, D.C. Dulles Intl Airport round-trip?
Delta, at $320, was found to be the cheapest airline from London Heathrow Airport to Washington, D.C. Dulles Intl Airport.Alternate airlines to your destination round-trip include Scandinavian Airlines and Austrian Airlines. These flights start at 59% lower than the current average price 3 months from now.
What are the cheapest airlines to fly from London Heathrow Airport to Washington, D.C. Dulles Intl Airport one-way?
One-way options have recently been found by users for as low as $538 on SWISS. Other airlines that offer cheap prices include Austrian Airlines from $540 and United Airlines from $550 one-way.
What are the most reliable airlines from London Heathrow Airport to Washington, D.C. Dulles Intl Airport?
No one likes to see their flight delayed. When booking a flight from London Heathrow Airport to Washington, D.C. Dulles Intl Airport consider choosing KLM (89%), Air France (89%) or Delta (89%) as they are the most reliable in getting you off to your destination on time.
What are the cheapest flights from London Heathrow Airport to Washington, D.C. Dulles Intl Airport?
On average you can expect to pay $1,565 for a flight from London Heathrow Airport to Washington, D.C. Dulles Intl Airport. The cheapest flight overall is $559 while the most popular route, (London Heathrow - Washington, D.C. Dulles Intl) is currently priced at $508.
Can I find deals for flights from Heathrow to Dulles Intl that include hotel bookings?
Yes. In addition to deals on Heathrow to Dulles Intl flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Heathrow to Dulles Intl?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Heathrow to Dulles Intl.
Can I find deals for business class flights from Heathrow to Dulles Intl?
Yes. Cheapflights offers flight deals from Heathrow to Dulles Intl 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 London Heathrow Airport to Washington, D.C. Dulles Intl Airport?
Currently, September is the cheapest month in which you can book a flight from London Heathrow Airport to Washington, D.C. Dulles Intl Airport (average of $508). Flying from London Heathrow Airport to Washington, D.C. Dulles Intl Airport in July is currently the most expensive (average of $719). 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.

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Top 10 airlines flying from Heathrow to Dulles Intl

Airline	Cheapest	Average	Flexibility	On-time
Delta	Cheapest$320	Average$952	FlexibilityNo cancel fee	On-timeN/A
Scandinavian Airlines	Cheapest$390	Average$833	FlexibilityNo cancel fee	On-time77%
Austrian Airlines	Cheapest$431	Average$858	FlexibilityNo cancel fee	On-time78%
TAP AIR PORTUGAL	Cheapest$473	Average$714	FlexibilityNo cancel fee	On-timeN/A
Icelandair	Cheapest$490	Average$671	FlexibilityNo cancel fee	On-time76%
American Airlines	Cheapest$562	Average$692	FlexibilityNo cancel fee	On-time71%
United Airlines	Cheapest$567	Average$826	FlexibilityNo cancel fee	On-time69%
British Airways	Cheapest$594	Average$831	FlexibilityNo cancel fee	On-time70%
Air Canada	Cheapest$635	Average$663	FlexibilityNo cancel fee	On-time67%
Lufthansa	Cheapest$649	Average$873	FlexibilityNo cancel fee	On-time76%

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$495+ Cheap flights from Heathrow (LHR) to Dulles Intl (IAD)

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 11/15. Fares are subject to change and may not be available on all flights or dates of travel.

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Cheapflights Tip: The best prices from London Heathrow to Washington, D.C. Dulles Intl are usually found in September or February, booked 65 days in advance, depart on a Thursday or Wednesday and return on a Wednesday

Cheap flight deals from Heathrow to Dulles Intl

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Find flight deals from Heathrow to Dulles Intl

Cheapest flights from Heathrow to Dulles IntlExplore the most affordable flight options available from Heathrow to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 27, 2025.

Explore the most affordable flight options available from Heathrow to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 27, 2025.

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

Compare providers for flights from Heathrow to Dulles Intl

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 Heathrow to Dulles Intl in October.

Best time to book a flight from Heathrow to Dulles Intl

Have a flexible travel schedule? Discover the best time to fly to Dulles Intl from Heathrow with our price prediction graph.

Cheapflights Insights

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

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

What is the cheapest month to book a flight from London Heathrow Airport to Washington, D.C. Dulles Intl Airport?

What is the cheapest time of day to fly from LHR to IAD?

Weekly flight availability from London Heathrow Airport to Washington, D.C. Dulles Intl Airport

How often are flights from London to Washington, D.C. delayed?

What is the most punctual flight time for London to Washington, D.C. flights?

What day of the week experiences the fewest flight delays on this route?

Which airline has the best punctuality record on London to Washington, D.C. flights?

What’s the top layover airport for flights from London Heathrow Airport to Washington, D.C. Dulles Intl Airport?

What’s the fastest layover option from London Heathrow Airport to Washington, D.C. Dulles Intl Airport?

What’s the fastest layover option from London Heathrow Airport to Washington, D.C. Dulles Intl Airport?

Which airport typically offers the quickest layover for flights from London Heathrow Airport to Washington, D.C. Dulles Intl Airport?

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

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

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IAD

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Reviews of airlines servicing Dulles Intl

See what other customers who have flown with Delta, Virgin Atlantic, and United Airlines from London Heathrow Airport to Washington, D.C. Dulles Intl Airport have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from Heathrow to Dulles Intl. 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 London Heathrow Airport to Washington, D.C. Dulles Intl Airport?

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

What are the cheapest airlines to fly from London Heathrow Airport to Washington, D.C. Dulles Intl Airport one-way?

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

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

Can I find deals for flights from Heathrow to Dulles Intl that include hotel bookings?

How can I find direct flights from Heathrow to Dulles Intl?

Can I find deals for business class flights from Heathrow to Dulles Intl?

What is the cheapest month to book a flight from London Heathrow Airport to Washington, D.C. Dulles Intl Airport?

Traveling to a place near Washington, D.C. Dulles Intl Airport?

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Alternative routes for Heathrow to Dulles Intl

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Top 10 airlines flying from Heathrow to Dulles Intl

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Cheapest flights from Heathrow to Dulles Intl
Explore the most affordable flight options available from Heathrow to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 27, 2025.