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 United Airlines (94%), Air Canada (92%) or Austrian Airlines (92%) as they are the most reliable in getting you off to your destination on time.

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 American Airlines, British Airways or Delta as they are the most popular for this route.

What is the cheapest day to fly round-trip from London Heathrow Airport to Washington, D.C. Dulles Intl Airport?

Users have found that flying from London Heathrow Airport to Washington, D.C. Dulles Intl Airport on a Sunday typically leans towards higher prices. However, this doesn’t mean you still can’t find a deal. Flexibility with other aspects of your flight can still land a great price for your trip.

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

The best pricing can be found in the month of February. Prices to Washington, D.C. Dulles Intl Airport from London Heathrow Airport average $733. You can even find prices in February for less than $733, as users have found deals to Washington, D.C. Dulles Intl Airport from as low as $305. The month of July appears to be one of the more expensive times to travel to Washington, D.C. Dulles Intl Airport from London Heathrow Airport. Flying in the targeted month can save you up to 17%.

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.

$411+ Flights from London Heathrow Airport to Washington, D.C. Dulles Intl Airport

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Find cheap flights from Heathrow to Dulles Intl 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 London Heathrow to Washington, D.C. Dulles Intl are usually found in February or March, booked 68 days in advance, depart on a Tuesday or Thursday 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	$610 (EaseMyTrip)
One-way from	$411 (Kiwi.com)
Popular in	August
Cheapest in	February
Average price	$759
Good round-trip deal	$697 or less
Good one-way deal	$792 or less

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

Search Deals

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

Search Deals

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

Search Deals

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

Search Deals

Highest demand for flights based on searches. 13% potential increase in price ($125 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease ($21 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in April 2025

Search Deals

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 April 11, 2025.

Thu 11/67:05 amLHR - IAD

2 stops15h 10mScandinavian Airlines

Mon 11/108:30 pmIAD - LHR

1 stop20h 10mScandinavian Airlines

Deal found 4/10

$606

Sat 5/2412:15 pmLHR - IAD

Nonstop8h 20mLufthansa

Sat 5/3110:23 pmIAD - LHR

2 stops27h 12mLufthansa

Deal found 4/10

$611

Sat 4/261:05 pmLHR - IAD

1 stop30h 45mAustrian Airlines

Sun 4/275:10 pmIAD - LHR

1 stop13h 35mAustrian Airlines

Deal found 4/11

$645

Mon 5/56:45 pmLHR - IAD

1 stop25h 35mTAP AIR PORTUGAL

Thu 5/85:50 pmIAD - LHR

1 stop23h 15mTAP AIR PORTUGAL

Deal found 4/10

$653

Wed 5/78:50 amLHR - IAD

2 stops15h 30mMultiple Airlines

Wed 5/148:30 pmIAD - LHR

2 stops14h 25mMultiple Airlines

Deal found 4/10

$657

Wed 4/239:25 pmLHR - IAD

1 stop26h 55mIcelandair

Wed 4/308:30 pmIAD - LHR

1 stop18h 50mIcelandair

Deal found 4/10

$663

Wed 4/2312:35 pmLHR - IAD

Nonstop8h 25mVirgin Atlantic

Wed 4/305:50 pmIAD - LHR

Nonstop7h 30mVirgin Atlantic

Deal found 4/10

$674

Sun 4/278:45 amLHR - IAD

1 stop12h 30mSWISS

Sun 5/48:45 pmIAD - LHR

1 stop11h 15mSWISS

Deal found 4/10

$677

Wed 4/3012:10 pmLHR - IAD

1 stop33h 05mUnited Airlines

Wed 5/75:44 pmIAD - LHR

1 stop11h 16mUnited Airlines

Deal found 4/10

$684

Thu 4/248:50 amLHR - IAD

1 stop12h 00mBritish Airways

Sun 4/275:40 pmIAD - LHR

Nonstop7h 35mBritish Airways

Deal found 4/10

$685

Fri 4/185:50 pmLHR - IAD

1 stop24h 40mBrussels Airlines

Sun 4/275:30 pmIAD - LHR

1 stop13h 50mBrussels Airlines

Deal found 4/10

$704

Thu 4/248:40 amLHR - IAD

1 stop11h 55mDelta

Wed 4/305:50 pmIAD - LHR

Nonstop7h 30mDelta

Deal found 4/9

$711

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 April 11, 2025.

Mon 9/2210:20 amLHR - IAD

1 stop14h 39mScandinavian Airlines

Wed 10/810:05 pmIAD - LHR

1 stop12h 55mScandinavian Airlines

Deal found 4/10

$610

Sat 5/2412:15 pmLHR - IAD

Nonstop8h 20mLufthansa

Sat 5/3110:23 pmIAD - LHR

2 stops27h 12mLufthansa

Deal found 4/10

$611

Sat 4/261:05 pmLHR - IAD

1 stop30h 45mAustrian Airlines

Sun 4/275:10 pmIAD - LHR

1 stop13h 35mAustrian Airlines

Deal found 4/11

$645

Mon 5/56:45 pmLHR - IAD

1 stop25h 35mTAP AIR PORTUGAL

Thu 5/85:50 pmIAD - LHR

1 stop23h 15mTAP AIR PORTUGAL

Deal found 4/10

$653

Wed 5/78:50 amLHR - IAD

2 stops15h 30mMultiple Airlines

Wed 5/148:30 pmIAD - LHR

2 stops14h 25mMultiple Airlines

Deal found 4/10

$657

Wed 4/239:25 pmLHR - IAD

1 stop26h 55mIcelandair

Wed 4/308:30 pmIAD - LHR

1 stop18h 50mIcelandair

Deal found 4/10

$663

Thu 4/248:40 amLHR - IAD

1 stop11h 55mVirgin Atlantic

Sun 4/275:50 pmIAD - LHR

Nonstop7h 30mVirgin Atlantic

Deal found 4/11

$673

Sun 4/278:45 amLHR - IAD

1 stop12h 30mSWISS

Sun 5/48:45 pmIAD - LHR

1 stop11h 15mSWISS

Deal found 4/10

$677

Wed 4/3012:10 pmLHR - IAD

1 stop33h 05mUnited Airlines

Wed 5/75:44 pmIAD - LHR

1 stop11h 16mUnited Airlines

Deal found 4/10

$684

Thu 4/248:50 amLHR - IAD

1 stop12h 00mBritish Airways

Sun 4/275:40 pmIAD - LHR

Nonstop7h 35mBritish Airways

Deal found 4/10

$685

Thu 4/2412:35 pmLHR - IAD

Nonstop8h 25mAir France

Fri 5/25:50 pmIAD - LHR

Nonstop7h 30mAir France

Deal found 4/10

$689

Thu 4/2412:05 pmLHR - IAD

2 stops14h 10mAir Canada

Tue 4/294:07 pmIAD - LHR

1 stop9h 23mAir Canada

Deal found 4/9

$704

Last-minute flights from Heathrow to Dulles Intl
Discover last-minute flight deals from Heathrow to Dulles Intl. Data last updated April 11, 2025 and is based on user searches.

Wed 4/1612:35 pmLHR - IAD

Nonstop8h 25mDelta

Wed 4/235:50 pmIAD - LHR

Nonstop7h 30mDelta

Deal found 4/9

$720

Wed 4/169:05 pmLHR - IAD

2 stops27h 54mScandinavian Airlines

Wed 9/2410:05 pmIAD - LHR

1 stop14h 35mScandinavian Airlines

Deal found 4/10

$739

Wed 4/166:45 pmLHR - IAD

1 stop25h 35mTAP AIR PORTUGAL

Wed 9/245:50 pmIAD - LHR

1 stop11h 30mTAP AIR PORTUGAL

Deal found 4/10

$754

Fri 4/189:15 amLHR - IAD

1 stop12h 07mBritish Airways

Sat 4/262:12 pmIAD - LHR

1 stop13h 53mBritish Airways

Deal found 4/10

$699

Fri 4/185:50 pmLHR - IAD

1 stop24h 40mBrussels Airlines

Sun 4/275:30 pmIAD - LHR

1 stop13h 50mBrussels Airlines

Deal found 4/10

$704

Fri 4/187:15 pmLHR - IAD

1 stop24h 00mSWISS

Mon 4/2810:15 pmIAD - LHR

Nonstop7h 25mSWISS

Deal found 4/10

$726

Fri 4/189:15 amLHR - IAD

1 stop15h 26mAmerican Airlines

Sun 4/277:25 pmIAD - LHR

Nonstop7h 20mAmerican Airlines

Deal found 4/10

$729

Fri 4/1812:15 pmLHR - IAD

Nonstop8h 10mLufthansa

Sun 4/2710:15 pmIAD - LHR

Nonstop7h 25mLufthansa

Deal found 4/10

$793

Fri 4/1811:45 amLHR - IAD

2 stops17h 43mAir France

Sun 4/275:32 pmIAD - LHR

2 stops34h 18mAir France

Deal found 4/10

$891

Sat 4/197:00 amLHR - IAD

1 stop12h 15mMultiple Airlines

Fri 5/26:30 pmIAD - LHR

Nonstop7h 25mMultiple Airlines

Deal found 4/10

$695

Sat 4/197:00 amLHR - IAD

1 stop12h 15mUnited Airlines

Fri 5/23:18 pmIAD - LHR

1 stop10h 12mUnited Airlines

Deal found 4/10

$696

Sun 4/208:30 amLHR - IAD

1 stop34h 41mAustrian Airlines

Sat 4/266:05 pmIAD - LHR

1 stop32h 20mAustrian Airlines

Deal found 4/10

$795

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 April 11, 2025.

Tue 5/278:50 pmLHR - IAD

2 stops23h 30mMultiple Airlines

Deal found 4/9

$411

Thu 5/88:00 amLHR - IAD

1 stop12h 20mTAP AIR PORTUGAL

Deal found 4/10

$432

Wed 4/309:50 amLHR - IAD

1 stop11h 00mAer Lingus

Deal found 4/10

$572

Sat 4/197:00 amLHR - IAD

1 stop12h 15mSWISS

Deal found 4/10

$597

Fri 5/99:25 pmLHR - IAD

1 stop26h 55mIcelandair

Deal found 4/10

$599

Tue 4/2912:15 pmLHR - IAD

Nonstop8h 10mLufthansa

Deal found 4/10

$640

Fri 4/2512:15 pmLHR - IAD

Nonstop8h 10mAustrian Airlines

Deal found 4/10

$641

Wed 4/305:00 pmLHR - IAD

Nonstop8h 10mFinnair

Deal found 4/10

$663

Sun 7/66:10 pmLHR - IAD

1 stop29h 55mRoyal Air Maroc

Deal found 4/10

$672

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

Mon 9/22

10:20 am-7:59 pm

1 stop14h 39m

Washington, D.C. Dulles Intl

Wed 10/8

10:05 pm-4:00 pm

1 stop12h 55m

$610

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Sat 5/24

12:15 pm-3:35 pm

Nonstop8h 20m

Washington, D.C. Dulles Intl

Sat 5/31

10:23 pm-6:35 am

2 stops27h 12m

$611

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Sat 4/26

1:05 pm-2:50 pm

1 stop30h 45m

Washington, D.C. Dulles Intl

Sun 4/27

5:10 pm-11:45 am

1 stop13h 35m

$645

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Mon 5/5

6:45 pm-3:20 pm

1 stop25h 35m

Washington, D.C. Dulles Intl

Thu 5/8

5:50 pm-10:05 pm

1 stop23h 15m

$653

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Wed 5/7

8:50 am-7:20 pm

2 stops15h 30m

Washington, D.C. Dulles Intl

Wed 5/14

8:30 pm-3:55 pm

2 stops14h 25m

$657

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Wed 4/23

9:25 pm-7:20 pm

1 stop26h 55m

Washington, D.C. Dulles Intl

Wed 4/30

8:30 pm-8:20 pm

1 stop18h 50m

$663

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Sat 5/3

8:40 am-3:35 pm

1 stop11h 55m

Washington, D.C. Dulles Intl

Sun 5/11

5:50 pm-6:20 am

Nonstop7h 30m

$668

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Sun 4/27

8:45 am-4:15 pm

1 stop12h 30m

Washington, D.C. Dulles Intl

Sun 5/4

8:45 pm-1:00 pm

1 stop11h 15m

$677

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Wed 4/30

12:10 pm-4:15 pm

1 stop33h 05m

Washington, D.C. Dulles Intl

Wed 5/7

5:44 pm-10:00 am

1 stop11h 16m

$684

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Thu 4/24

8:50 am-3:50 pm

1 stop12h 00m

Washington, D.C. Dulles Intl

Sun 4/27

5:40 pm-6:15 am

Nonstop7h 35m

$685

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/9

Showing 1-10 of 26 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 April.

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy1 star	Trust Score*3 stars
eDreams	Price Accuracy3 stars	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*3 stars
Cheapflightsfares	Price Accuracy1 star	Trust Score*2 stars
AranGrant	Price Accuracy3 stars	Trust Score*1 star
oojo	Price Accuracy3 stars	Trust Score*2 stars
Thrive Travel	Price Accuracy3 stars	Trust Score*2 stars
Gotogate	Price Accuracy3 stars	Trust Score*3 stars
Mytrip	Price Accuracy3 stars	Trust Score*3 stars
Flightnetwork	Price 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 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.

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

For a smooth departure from Heathrow, arrive early to enjoy lounges like Cathay Pacific's with its famous dan dan noodles.

IAD

Upon arrival at Dulles, use the Silver Line Metro for a cost-effective ride to downtown Washington, D.C.

Our travel experts

Gabriel Leigh

Expert on British Airways

Harriet Baskas

Expert on United Airlines

Ramsey Qubein

Expert on LHR and IAD

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

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 68 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, August is the cheapest month in which you can book a flight from London Heathrow Airport to Washington, D.C. Dulles Intl Airport (average of $309). Flying from London Heathrow Airport to Washington, D.C. Dulles Intl Airport in June is currently the most expensive (average of $383). 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 20% versus a flight in the afternoon.

What is the cheapest day to fly from London Heathrow Airport to Washington, D.C. Dulles Intl Airport?

Travelers seeking maximum savings on their London Heathrow Airport to Washington, D.C. Dulles Intl Airport flight should consider departing on Sunday at noon when fares are most often at their lowest. Monday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

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 (25 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (12 on average).

Rainfall in Dulles Intl by month

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.

Temperature in Dulles Intl by month

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).

Reviews of airlines servicing Dulles Intl

To help decide which airline to fly from London to Washington, D.C., see what other customers have to say about Delta, KLM and Finnair. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

Delta

8.0

Very good

7,911 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Delta

8.0

Very good

7,911 reviews

Delta

8.0

Very good

7,911 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

KLM

7.8

Good

1,321 reviews

Delta

8.0

Very good

7,911 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Finnair

7.6

Good

1,269 reviews

Delta

8.0

Very good

7,911 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Austrian Airlines

7.6

Good

774 reviews

Delta

8.0

Very good

7,911 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

SWISS

7.5

Good

1,575 reviews

Delta

8.0

Very good

7,911 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Related info for your journey

What are the cheapest airlines flying from London Heathrow Airport to Washington, D.C. Dulles Intl Airport round-trip?
Scandinavian Airlines, at $610, 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 Lufthansa and Austrian Airlines. These flights start at 26% 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 $432 on TAP AIR PORTUGAL. Other airlines that offer cheap prices include Aer Lingus from $572 and SWISS from $597 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 United Airlines (94%), Air Canada (92%) or Austrian Airlines (92%) 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 $1,396 for a flight from London Heathrow Airport to Washington, D.C. Dulles Intl Airport. The cheapest flight overall is $481 while the most popular route, (London Heathrow - Washington, D.C. Dulles Intl) is currently priced at $452.
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, August is the cheapest month in which you can book a flight from London Heathrow Airport to Washington, D.C. Dulles Intl Airport (average of $309). Flying from London Heathrow Airport to Washington, D.C. Dulles Intl Airport in June is currently the most expensive (average of $383). 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

Arlington

Alexandria

Fairfax

Tysons

Springfield

Rockville

Fredericksburg

Woodbridge

Gaithersburg

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Laurel

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Top 10 airlines flying from Heathrow to Dulles Intl

Airline	Cheapest	Average	Flexibility	On-time
Scandinavian Airlines	Cheapest$390	Average$785	FlexibilityNo cancel fee	On-time77%
PLAY	Cheapest$392	Average$560	FlexibilityNo cancel fee	On-timeN/A
Austrian Airlines	Cheapest$431	Average$1,181	FlexibilityNo cancel fee	On-time78%
Icelandair	Cheapest$529	Average$764	FlexibilityNo cancel fee	On-time76%
TAP AIR PORTUGAL	Cheapest$564	Average$804	FlexibilityNo cancel fee	On-timeN/A
Iberia	Cheapest$586	Average$977	FlexibilityNo cancel fee	On-time77%
British Airways	Cheapest$595	Average$881	FlexibilityNo cancel fee	On-time70%
American Airlines	Cheapest$619	Average$692	FlexibilityNo cancel fee	On-time71%
Delta	Cheapest$652	Average$926	FlexibilityNo cancel fee	On-timeN/A
Aer Lingus	Cheapest$660	Average$821	FlexibilityNo cancel fee	On-timeN/A

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$411+ 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 5/27. 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 February or March, booked 68 days in advance, depart on a Tuesday or Thursday and return on a Wednesday

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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 April 11, 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 April 11, 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 April.

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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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?

Use this chart to determine the optimal time to book a round-trip flight from Heathrow to Dulles Intl. Price data was last updated on April 4, 2025.

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?

Find hourly flight availability from Heathrow to Dulles Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 11, 2025.

What is the cheapest day to fly from London Heathrow Airport to Washington, D.C. Dulles Intl Airport?

Use this chart to determine the cheapest time to fly round-trip from Heathrow to Dulles Intl. Price data was last updated on March 30, 2025.

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

Explore weekly flight availability from Heathrow to Dulles Intl. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated April 11, 2025.

Rainfall in Dulles Intl by month

Plan your trip to Dulles Intl by taking into account the average rainfall totals by month.

Temperature in Dulles Intl by month

Plan your trip to Dulles Intl by taking into account the average temperature totals by month.

Reviews of airlines servicing Dulles Intl

To help decide which airline to fly from London to Washington, D.C., see what other customers have to say about Delta, KLM and Finnair. You can also see how each airline stacks up 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.

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?

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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 April 11, 2025.