How long is the flight from London Heathrow Airport to Washington, D.C.?

Icelandair, United Airlines, and Finnair can get you from London Heathrow Airport to Washington, D.C. in just under 11h 25m. Your travel time can differ by up to 11h 09m. The distance between London Heathrow Airport and Washington, D.C. is about 3622 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 London Heathrow Airport to Washington, D.C. round-trip?

Currently priced at $320, Delta will fly you from London Heathrow Airport to Washington, D.C. and back. In addition to Delta, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Scandinavian Airlines and Austrian Airlines - these airlines can fly you to your destination from $390 and $431, respectively. Delta is 58% cheaper than the average price of flights available within the next 90 days to this destination.

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

For one-way options, check prices for TAP AIR PORTUGAL. According to our data, you can fly for as low as $512. Users have also found prices from $518 and $523 on JetBlue and Icelandair, respectively.

In terms of precipitation, rainfall in Washington, D.C. 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. when rainfall is around 2.6 in.

If weather is an important factor for your trip to Washington, D.C., 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 routes from London Heathrow Airport to Washington, D.C.?

When deciding which route to take from London Heathrow Airport to Washington, D.C. consider London Heathrow - Washington, D.C. Dulles Intl, London Heathrow - Baltimore/Washington or London Heathrow - Washington, D.C. Reagan-National as they are the most popular.

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

Looking at all options, your cheapest flight can be booked for $560. While the most popular route (London Heathrow - Washington, D.C. Dulles Intl) can be booked for $435 on average our data indicates $2,877 when flying from London Heathrow Airport to Washington, D.C..

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

Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from London Heathrow Airport to Washington, D.C. on time: KLM (75%), Air France (75%), Delta (75%).

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

When booking a flight from London Heathrow Airport to Washington, D.C., you may want to consider flying on American Airlines, Air Canada or British Airways 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.?

Flights from London Heathrow Airport to Washington, D.C. are found to be more expensive on Saturday. This shouldn't discourage you from searching as you can still find great deals by being flexible with your options. Use our search form to find deals on tickets to Washington, D.C..

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

February can be a great time to fly to Washington, D.C. from London Heathrow Airport with a flight ticket averaging about $734. Cheapflights users have found deals in the month of February for as cheap as $305. The most expensive prices can be found in the month of July.

Can I find deals for flights from Heathrow to Washington, D.C. that include hotel bookings?

Yes. In addition to deals on Heathrow to Washington, D.C. flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from Heathrow to Washington, D.C.?

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

Can I find deals for business class flights from Heathrow to Washington, D.C.?

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

$435+ Flights from London Heathrow Airport to Washington, D.C.

Q: How much does it cost to fly round-trip from London Heathrow Airport to Washington, D.C.?

Airfare is below average for this route at the moment. London Heathrow Airport to Washington, D.C. flights typically cost between $638 and $820 in September. The cheapest round-trip price found within the last 3 days was $549 on Virgin Atlantic (Sep 15-Oct 6).

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Find cheap flights from Heathrow to Washington, D.C. 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

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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. are usually found in February or September, booked 44 days in advance, depart on a Thursday or Tuesday and return on a Wednesday

Cheap flight deals from Heathrow to Washington, D.C.

Round-trip from	$549 (TravelUp)
One-way from	$435 (Kiwi.com)
Popular in	July
Cheapest in	February
Average price	$865
Good round-trip deal	$675 or less
Good one-way deal	$681 or less

From London Heathrow to Washington, D.C. (WAS)

Search Deals

One-way flight from London Heathrow to Washington, D.C. (WAS)

Search Deals

Highest demand for flights based on searches. 10% potential increase in price ($91 potential increase over avg. RT price).

Search Deals

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 August 2025

Search Deals

Price to beat on a round-trip flight from London Heathrow to Washington, D.C. (WAS).

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Price to beat on a one-way flight from London Heathrow to Washington, D.C. (WAS).

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Find flight deals from Heathrow to Washington, D.C.

Cheapest flights from Heathrow to Washington, D.C.
Explore the most affordable flight options available from Heathrow to Washington, D.C.. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 28, 2025.

Mon 9/151:05 pmLHR - BWI

1 stop16h 23mVirgin Atlantic

Mon 10/66:22 pmBWI - LHR

1 stop11h 48mVirgin Atlantic

Deal found 8/27

$549

Tue 10/76:40 amLHR - BWI

2 stops17h 45mMultiple Airlines

Mon 10/138:30 pmBWI - LHR

2 stops19h 50mMultiple Airlines

Deal found 8/28

$551

Mon 9/86:50 amLHR - BWI

2 stops15h 39mUnited Airlines

Tue 9/305:20 pmBWI - LHR

1 stop13h 25mUnited Airlines

Deal found 8/28

$553

Mon 9/811:00 amLHR - BWI

1 stop11h 47mMultiple Airlines

Thu 11/138:35 pmBWI - LHR

Nonstop7h 05mMultiple Airlines

Deal found 8/28

$554

Tue 9/237:40 amLHR - BWI

2 stops28h 21mMultiple Airlines

Tue 9/305:45 amBWI - LHR

2 stops32h 10mMultiple Airlines

Deal found 8/28

$555

Wed 9/248:50 amLHR - BWI

2 stops27h 11mMultiple Airlines

Wed 10/15:45 amBWI - LHR

2 stops33h 35mMultiple Airlines

Deal found 8/27

$556

Tue 9/98:40 amLHR - IAD

1 stop11h 55mDelta

Wed 10/15:50 pmIAD - LHR

Nonstop7h 30mDelta

Deal found 8/28

$558

Thu 9/187:40 amLHR - BWI

2 stops15h 00mMultiple Airlines

Sun 9/216:50 pmBWI - LHR

2 stops20h 30mMultiple Airlines

Deal found 8/27

$558

Tue 9/29:25 pmLHR - IAD

1 stop29h 45mIcelandair

Wed 9/178:30 pmIAD - LHR

1 stop10h 25mIcelandair

Deal found 8/28

$559

Tue 11/2512:15 pmLHR - BWI

1 stop11h 25mIcelandair

Thu 12/117:40 pmBWI - LHR

1 stop18h 50mIcelandair

Deal found 8/27

$559

Sun 12/149:05 pmLHR - IAD

2 stops25h 10mScandinavian Airlines

Wed 12/318:30 pmIAD - LHR

1 stop14h 30mScandinavian Airlines

Deal found 8/28

$560

Sat 9/272:05 pmLHR - DCA

1 stop12h 46mAir Canada

Sat 10/44:35 pmDCA - LHR

1 stop12h 00mAir Canada

Deal found 8/28

$560

Best flights from Heathrow to Washington, D.C.
Discover carefully curated flight deals from Heathrow to Washington, D.C. that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 28, 2025.

Thu 11/612:15 pmLHR - BWI

1 stop11h 25mIcelandair

Mon 11/107:40 pmBWI - LHR

1 stop10h 10mIcelandair

Deal found 8/28

$551

Mon 9/86:50 amLHR - BWI

2 stops15h 39mUnited Airlines

Tue 9/3010:51 amBWI - LHR

2 stops14h 54mUnited Airlines

Deal found 8/28

$553

Wed 9/107:05 pmLHR - BWI

2 stops22h 34mFinnair

Tue 9/3011:23 amBWI - LHR

2 stops13h 57mFinnair

Deal found 8/28

$554

Tue 9/237:40 amLHR - BWI

2 stops28h 21mMultiple Airlines

Tue 9/305:45 amBWI - LHR

2 stops32h 10mMultiple Airlines

Deal found 8/28

$555

Wed 9/106:30 amLHR - IAD

1 stop14h 05mDelta

Mon 9/295:50 pmIAD - LHR

Nonstop7h 30mDelta

Deal found 8/28

$558

Sat 9/272:05 pmLHR - DCA

1 stop12h 46mAir Canada

Sat 10/44:35 pmDCA - LHR

1 stop12h 00mAir Canada

Deal found 8/28

$560

Wed 10/84:35 pmLHR - BWI

Nonstop8h 10mBritish Airways

Mon 10/139:35 pmBWI - LHR

Nonstop7h 15mBritish Airways

Deal found 8/28

$561

Mon 9/84:35 pmLHR - BWI

Nonstop8h 10mAmerican Airlines

Mon 10/69:35 pmBWI - LHR

Nonstop7h 15mAmerican Airlines

Deal found 8/28

$561

Sat 1/106:40 amLHR - IAD

2 stops17h 10mScandinavian Airlines

Sat 1/248:30 pmIAD - LHR

1 stop20h 10mScandinavian Airlines

Deal found 8/27

$568

Mon 9/86:30 amLHR - IAD

1 stop14h 05mVirgin Atlantic

Mon 9/155:50 pmIAD - LHR

Nonstop7h 30mVirgin Atlantic

Deal found 8/28

$570

Tue 11/1812:15 pmLHR - BWI

1 stop11h 25mIcelandair

Sun 11/307:40 pmBWI - LHR

1 stop10h 10mIcelandair

Deal found 8/28

$553

Sat 11/226:50 amLHR - BWI

2 stops15h 24mMultiple Airlines

Sun 11/3010:56 amBWI - LHR

1 stop13h 59mMultiple Airlines

Deal found 8/28

$556

Last-minute flights from Heathrow to Washington, D.C.
Discover last-minute flight deals from Heathrow to Washington, D.C.. Data last updated August 28, 2025 and is based on user searches.

Tue 9/29:25 pmLHR - IAD

1 stop29h 45mIcelandair

Wed 9/178:30 pmIAD - LHR

1 stop10h 25mIcelandair

Deal found 8/28

$559

Mon 9/86:50 amLHR - BWI

2 stops15h 39mUnited Airlines

Tue 9/305:20 pmBWI - LHR

1 stop13h 25mUnited Airlines

Deal found 8/28

$553

Mon 9/811:00 amLHR - BWI

1 stop11h 47mFinnair

Mon 10/66:13 pmBWI - LHR

1 stop11h 17mFinnair

Deal found 8/28

$554

Mon 9/812:35 pmLHR - IAD

Nonstop8h 25mDelta

Mon 9/155:50 pmIAD - LHR

Nonstop7h 30mDelta

Deal found 8/28

$561

Mon 9/84:35 pmLHR - BWI

Nonstop8h 10mBritish Airways

Tue 9/169:35 pmBWI - LHR

Nonstop7h 15mBritish Airways

Deal found 8/28

$561

Mon 9/84:35 pmLHR - BWI

Nonstop8h 10mAmerican Airlines

Thu 11/138:35 pmBWI - LHR

Nonstop7h 05mAmerican Airlines

Deal found 8/28

$562

Tue 9/96:30 amLHR - IAD

1 stop14h 05mDelta

Tue 9/305:50 pmIAD - LHR

Nonstop7h 30mDelta

Deal found 8/28

$558

Mon 9/151:05 pmLHR - BWI

1 stop16h 23mVirgin Atlantic

Mon 10/66:22 pmBWI - LHR

1 stop11h 48mVirgin Atlantic

Deal found 8/27

$549

Thu 9/187:40 amLHR - BWI

2 stops15h 00mMultiple Airlines

Sun 9/216:50 pmBWI - LHR

2 stops20h 30mMultiple Airlines

Deal found 8/27

$558

Tue 9/237:40 amLHR - BWI

2 stops28h 21mMultiple Airlines

Tue 9/305:45 amBWI - LHR

2 stops32h 10mMultiple Airlines

Deal found 8/28

$555

Wed 9/248:50 amLHR - BWI

2 stops27h 11mMultiple Airlines

Wed 10/15:45 amBWI - LHR

2 stops33h 35mMultiple Airlines

Deal found 8/27

$556

Sat 9/272:05 pmLHR - DCA

1 stop12h 46mAir Canada

Sat 10/44:35 pmDCA - LHR

1 stop12h 00mAir Canada

Deal found 8/28

$560

One-way flights from Heathrow to Washington, D.C.
Search for one-way flight options from Heathrow to Washington, D.C.. Find affordable one-way fares based on user searches. Data last updated August 28, 2025.

Tue 10/79:25 pmLHR - BWI

1 stop25h 15mMultiple Airlines

Deal found 8/28

$435

Wed 10/226:15 amLHR - BWI

2 stops16h 25mMultiple Airlines

Deal found 8/26

$436

Fri 9/266:00 amLHR - BWI

2 stops30h 01mMultiple Airlines

Deal found 8/27

$437

Fri 9/129:10 pmLHR - BWI

2 stops25h 30mMultiple Airlines

Deal found 8/27

$438

Wed 9/39:55 amLHR - BWI

3 stops40h 19mMultiple Airlines

Deal found 8/26

$441

Sun 10/56:30 amLHR - BWI

2 stops40h 10mMultiple Airlines

Deal found 8/27

$444

Fri 9/56:00 amLHR - BWI

2 stops22h 37mMultiple Airlines

Deal found 8/27

$445

Mon 9/87:50 pmLHR - BWI

3 stops31h 43mMultiple Airlines

Deal found 8/26

$446

Sun 9/143:05 pmLHR - BWI

3 stops30h 41mMultiple Airlines

Deal found 8/28

$449

Tue 9/29:25 pmLHR - BWI

1 stop25h 15mMultiple Airlines

Deal found 8/26

$450

Fri 11/146:00 amLHR - BWI

3 stops23h 15mMultiple Airlines

Deal found 8/26

$452

Wed 9/107:50 pmLHR - BWI

3 stops49h 56mMultiple Airlines

Deal found 8/26

$453

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

LondonBaltimore

LHR - BWI

LHRBWI

London Heathrow

Thu 11/6

12:15 pm-6:40 pm

1 stop11h 25m

Baltimore/Washington

Mon 11/10

7:40 pm-10:50 am

1 stop10h 10m

$551

LondonBaltimore

LHR - BWI

LHRBWI

London Heathrow

Mon 9/8

6:50 am-5:29 pm

2 stops15h 39m

Baltimore/Washington

Tue 9/30

10:51 am-6:45 am

2 stops14h 54m

$553

LondonBaltimore

LHR - BWI

LHRBWI

London Heathrow

Tue 11/18

12:15 pm-6:40 pm

1 stop11h 25m

Baltimore/Washington

Sun 11/30

7:40 pm-10:50 am

1 stop10h 10m

$553

LondonBaltimore

LHR - BWI

LHRBWI

London Heathrow

Wed 9/10

7:05 pm-12:39 pm

2 stops22h 34m

Baltimore/Washington

Tue 9/30

11:23 am-6:20 am

2 stops13h 57m

$554

LondonBaltimore

LHR - BWI

LHRBWI

London Heathrow

Tue 9/23

7:40 am-7:01 am

2 stops28h 21m

Baltimore/Washington

Tue 9/30

5:45 am-6:55 pm

2 stops32h 10m

$555

LondonBaltimore

LHR - BWI

LHRBWI

London Heathrow

Sat 11/22

6:50 am-5:14 pm

2 stops15h 24m

Baltimore/Washington

Sun 11/30

10:56 am-5:55 am

1 stop13h 59m

$556

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Wed 9/10

6:30 am-3:35 pm

1 stop14h 05m

Washington, D.C. Dulles Intl

Mon 9/29

5:50 pm-6:20 am

Nonstop7h 30m

$558

LondonBaltimore

LHR - BWI

LHRBWI

London Heathrow

Mon 9/8

4:35 pm-7:45 pm

Nonstop8h 10m

Baltimore/Washington

Mon 10/6

1:05 pm-9:05 am

1 stop15h 00m

$559

LondonWashington, D.C.

LHR - DCA

LHRDCA

London Heathrow

Sat 9/27

2:05 pm-9:51 pm

1 stop12h 46m

Washington, D.C. Reagan-National

Sat 10/4

4:35 pm-9:35 am

1 stop12h 00m

$560

LondonBaltimore

LHR - BWI

LHRBWI

London Heathrow

Wed 10/8

4:35 pm-7:45 pm

Nonstop8h 10m

Baltimore/Washington

Mon 10/13

9:35 pm-9:50 am

Nonstop7h 15m

$561

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/28

Showing 1-10 of 60 results

...

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

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

Airlines

British Airways

BA's Club Suite offers private pods with a door, enhancing comfort on long-haul flights.

BA's World Traveller Plus offers extra seat width and legroom, ideal for long-haul comfort.

Read more about British Airwaysby Gabriel Leigh

United Airlines

United's Polaris Business Class features lie-flat seats, Saks Fifth Avenue bedding, and upscale amenities.

United's Premium Plus offers 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 the Cathay Pacific lounge in Terminal 3, known for its dan dan noodles.

IAD

Upon arriving at IAD, take the Silver Line Metro for a cost-effective and quick 40-minute ride to 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 Washington, D.C.

Have a flexible travel schedule? Discover the best time to fly to Washington, D.C. 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.

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

Booking 44 days in advance of your planned departure date is, on average, the best time to get cheap flights from London Heathrow Airport to Washington, D.C.. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

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

Currently, August is the cheapest month in which you can book a flight from London Heathrow Airport to Washington, D.C. (average of $300). Flying from London Heathrow Airport to Washington, D.C. in April is currently the most expensive (average of $337). 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 WAS?

When flying from London Heathrow Airport to Washington, D.C., 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 15% versus a flight at noon.

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

Travelers seeking maximum savings on their London Heathrow Airport to Washington, D.C. flight should consider departing on Tuesday at noon when fares are most often at their lowest. Sunday afternoons 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.

The most flights from LHR to WAS are scheduled on a Wednesday (28 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (6 on average).

How much does it cost to fly round-trip from London Heathrow Airport to Washington, D.C.?

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

Reykjavik (KEF) – chosen by Cheapflights users on 62% of 1-stop itineraries from London Heathrow Airport to Washington, D.C. on Cheapflights.

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

Reykjavik (KEF) is the most affordable 1-stop option, with an average round-trip price of $478.

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

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

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

Flights via Reykjavik (KEF) offer the fastest connection on this route, with an average layover time of 1h 20m.

Reviews of airlines servicing Washington, D.C.

Read reviews from past customers who have flown Delta, United Airlines, and American Airlines from London Heathrow Airport to Washington, D.C.. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.

Delta

8.0

Very good

7,977 reviews

Reviews

1 / 20

6.0

Good

Morgan Rae,Aug 2025

BRU - JFK

Typically I choose delta because they do a great job but this time the flight attendant in my zone was very rude and didnt offer the same treatment as she did to others

Delta

8.0

Very good

7,977 reviews

Delta

8.0

Very good

7,977 reviews

Reviews

1 / 20

6.0

Good

Morgan Rae,Aug 2025

BRU - JFK

Typically I choose delta because they do a great job but this time the flight attendant in my zone was very rude and didnt offer the same treatment as she did to others

United Airlines

7.4

Good

8,944 reviews

Delta

8.0

Very good

7,977 reviews

Reviews

1 / 20

6.0

Good

Morgan Rae,Aug 2025

BRU - JFK

Typically I choose delta because they do a great job but this time the flight attendant in my zone was very rude and didnt offer the same treatment as she did to others

American Airlines

7.2

Good

10,000 reviews

Delta

8.0

Very good

7,977 reviews

Reviews

1 / 20

6.0

Good

Morgan Rae,Aug 2025

BRU - JFK

Typically I choose delta because they do a great job but this time the flight attendant in my zone was very rude and didnt offer the same treatment as she did to others

Icelandair

7.0

Good

537 reviews

Delta

8.0

Very good

7,977 reviews

Reviews

1 / 20

6.0

Good

Morgan Rae,Aug 2025

BRU - JFK

Typically I choose delta because they do a great job but this time the flight attendant in my zone was very rude and didnt offer the same treatment as she did to others

British Airways

6.7

Okay

7,316 reviews

Delta

8.0

Very good

7,977 reviews

Reviews

1 / 20

6.0

Good

Morgan Rae,Aug 2025

BRU - JFK

Typically I choose delta because they do a great job but this time the flight attendant in my zone was very rude and didnt offer the same treatment as she did to others

Related info for your journey

How long is the flight from London Heathrow Airport to Washington, D.C.?
Icelandair, United Airlines, and Finnair can get you from London Heathrow Airport to Washington, D.C. in just under 11h 25m. Your travel time can differ by up to 11h 09m. The distance between London Heathrow Airport and Washington, D.C. is about 3622 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 London Heathrow Airport to Washington, D.C. round-trip?
Currently priced at $320, Delta will fly you from London Heathrow Airport to Washington, D.C. and back. In addition to Delta, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Scandinavian Airlines and Austrian Airlines - these airlines can fly you to your destination from $390 and $431, respectively. Delta is 58% cheaper than the average price of flights available within the next 90 days to this destination.
What are the cheapest airlines to fly from London Heathrow Airport to Washington, D.C. one-way?
For one-way options, check prices for TAP AIR PORTUGAL. According to our data, you can fly for as low as $512. Users have also found prices from $518 and $523 on JetBlue and Icelandair, respectively.
What are the most popular routes from London Heathrow Airport to Washington, D.C.?
When deciding which route to take from London Heathrow Airport to Washington, D.C. consider London Heathrow - Washington, D.C. Dulles Intl, London Heathrow - Baltimore/Washington or London Heathrow - Washington, D.C. Reagan-National as they are the most popular.
What are the most reliable airlines from London Heathrow Airport to Washington, D.C.?
Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from London Heathrow Airport to Washington, D.C. on time: KLM (75%), Air France (75%), Delta (75%).
What are the cheapest flights from London Heathrow Airport to Washington, D.C.?
Looking at all options, your cheapest flight can be booked for $560. While the most popular route (London Heathrow - Washington, D.C. Dulles Intl) can be booked for $435 on average our data indicates $2,877 when flying from London Heathrow Airport to Washington, D.C..
Can I find deals for flights from Heathrow to Washington, D.C. that include hotel bookings?
Yes. In addition to deals on Heathrow to Washington, D.C. flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Heathrow to Washington, D.C.?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Heathrow to Washington, D.C..
Can I find deals for business class flights from Heathrow to Washington, D.C.?
Yes. Cheapflights offers flight deals from Heathrow to Washington, D.C. 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.?
Currently, August is the cheapest month in which you can book a flight from London Heathrow Airport to Washington, D.C. (average of $300). Flying from London Heathrow Airport to Washington, D.C. in April is currently the most expensive (average of $337). 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

Woodbridge

Arlington

Alexandria

Tysons

Silver Spring

Springfield

Fredericksburg

Gaithersburg

Linthicum Heights

Fairfax

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Falls Church

Laurel

Rockville

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National Harbor

Dundalk

Waldorf

Bowie

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Top 10 airlines flying from Heathrow to Washington, D.C.

Airline	Cheapest	Average	Flexibility	On-time
Delta	Cheapest$320	Average$949	FlexibilityNo cancel fee	On-timeN/A
Scandinavian Airlines	Cheapest$390	Average$833	FlexibilityNo cancel fee	On-time77%
Austrian Airlines	Cheapest$431	Average$984	FlexibilityNo cancel fee	On-time78%
TAP AIR PORTUGAL	Cheapest$473	Average$714	FlexibilityNo cancel fee	On-timeN/A
Icelandair	Cheapest$510	Average$682	FlexibilityNo cancel fee	On-time76%
British Airways	Cheapest$595	Average$851	FlexibilityNo cancel fee	On-time70%
American Airlines	Cheapest$619	Average$752	FlexibilityNo cancel fee	On-time71%
Air Canada	Cheapest$635	Average$663	FlexibilityNo cancel fee	On-time67%
Aer Lingus	Cheapest$652	Average$802	FlexibilityNo cancel fee	On-timeN/A
United Airlines	Cheapest$663	Average$851	FlexibilityNo cancel fee	On-time69%

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$435+ Cheap flights from Heathrow (LHR) to Washington, D.C. (WAS)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/7. 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. are usually found in February or September, booked 44 days in advance, depart on a Thursday or Tuesday and return on a Wednesday

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Cheapest flights from Heathrow to Washington, D.C.Explore the most affordable flight options available from Heathrow to Washington, D.C.. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 28, 2025.

Explore the most affordable flight options available from Heathrow to Washington, D.C.. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 28, 2025.

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Best time to book a flight from Heathrow to Washington, D.C.

Have a flexible travel schedule? Discover the best time to fly to Washington, D.C. 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.

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

Use this chart to determine the optimal time to book a round-trip flight from Heathrow to Washington, D.C.. Price data was last updated on August 22, 2025.

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

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

Find hourly flight availability from Heathrow to Washington, D.C.. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated August 28, 2025.

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

Use this chart to determine the cheapest time to fly round-trip from Heathrow to Washington, D.C.. Price data was last updated on December 16, 2024.

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

How much does it cost to fly round-trip from London Heathrow Airport to Washington, D.C.?

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

Share of 1-stop round-trip flights from London Heathrow Airport to Washington, D.C. chosen by Cheapflights users in the past 12 months, using the same layover each way.

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

Average round-trip fare for 1-stop flights from London Heathrow Airport to Washington, D.C., chosen by Cheapflights users in the past 12 months, with the same layover each way.

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

Shortest average travel time for 1-stop one-way flights from London Heathrow Airport to Washington, D.C., based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.

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

Average layover duration for 1-stop one-way flights from London Heathrow Airport to Washington, D.C., chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Reviews of airlines servicing Washington, D.C.

Related info for your journey

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

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

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

What are the most popular routes from London Heathrow Airport to Washington, D.C.?

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

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

Can I find deals for flights from Heathrow to Washington, D.C. that include hotel bookings?

How can I find direct flights from Heathrow to Washington, D.C.?

Can I find deals for business class flights from Heathrow to Washington, D.C.?

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

Traveling to a place near Washington, D.C.?

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Top 10 airlines flying from Heathrow to Washington, D.C.

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Cheapest flights from Heathrow to Washington, D.C.
Explore the most affordable flight options available from Heathrow to Washington, D.C.. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 28, 2025.