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

Currently priced at $560, Icelandair will fly you from London Heathrow Airport to Washington, D.C. and back. In addition to Icelandair, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Scandinavian Airlines and JetBlue - these airlines can fly you to your destination from $565 and $576, respectively. Icelandair is 30% 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 $435. Users have also found prices from $531 and $567 on WestJet 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 cheapest flights from London Heathrow Airport to Washington, D.C.?

Looking at all options, your cheapest flight can be booked for $619. While the most popular route (London Heathrow - Washington, D.C. Dulles Intl) can be booked for $221 on average our data indicates $1,588 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 (90%), Air France (90%), Delta (90%).

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, 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.?

Flights from London Heathrow Airport to Washington, D.C. are found to be more expensive on Sunday. 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 $732. 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.

Most accurate provider : When it comes to deals on London Heathrow Airport-Washington, D.C. 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. flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from London Heathrow Airport-Washington, D.C. 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. 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. 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 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.

$325+ Flights from London Heathrow Airport to Washington, D.C.

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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

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. are usually found in February or January, booked 52 days in advance, depart on a Tuesday or Thursday and return on a Tuesday

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

Most accurate provider	FlightHub 3 stars
Most trusted provider	FlightHub 3 stars
Round-trip from	$559 (Kiwi.com)
One-way from	$325 (Kiwi.com)
Popular in	August
Cheapest in	February
Average price	$732
Good round-trip deal	$694 or less
Good one-way deal	$780 or less

Provider with most accurate pricing for London Heathrow-Washington, D.C. (WAS) flight deals.

Search Deals

Provider most trusted by Cheapflights users for London Heathrow-Washington, D.C. (WAS) flights.

Search Deals

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. 9% potential increase in price ($83 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 1% potential price decrease ($14 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in March 2025

Search Deals

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

Search Deals

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 March 26, 2025.

Wed 4/239:25 pmLHR - BWI

1 stop25h 15mMultiple Airlines

Wed 4/306:50 pmBWI - LHR

2 stops21h 45mMultiple Airlines

Deal found 3/24

$559

Thu 4/249:25 pmLHR - BWI

1 stop27h 00mIcelandair

Wed 4/308:30 pmBWI - LHR

1 stop10h 25mIcelandair

Deal found 3/25

$560

Sat 5/2412:40 pmLHR - DCA

1 stop28h 21mLufthansa

Sat 5/316:00 amDCA - LHR

1 stop9h 40mLufthansa

Deal found 3/24

$561

Wed 5/146:40 amLHR - IAD

1 stop18h 19mScandinavian Airlines

Wed 10/810:05 pmIAD - LHR

1 stop18h 35mScandinavian Airlines

Deal found 3/25

$565

Wed 4/308:25 amLHR - DCA

1 stop13h 30mIcelandair

Tue 5/610:10 amDCA - LHR

1 stop15h 20mIcelandair

Deal found 3/24

$565

Wed 5/78:25 amLHR - DCA

1 stop13h 30mJetBlue

Wed 5/146:09 amDCA - LHR

1 stop9h 36mJetBlue

Deal found 3/24

$575

Sat 5/36:30 amLHR - IAD

1 stop12h 00mLufthansa

Sat 5/2410:23 pmIAD - LHR

2 stops29h 12mLufthansa

Deal found 3/25

$589

Fri 4/259:25 pmLHR - IAD

1 stop26h 55mIcelandair

Tue 4/298:30 pmIAD - LHR

1 stop10h 25mIcelandair

Deal found 3/25

$594

Wed 6/118:40 amLHR - DCA

2 stops30h 39mAir Canada

Wed 6/186:00 amDCA - LHR

3 stops21h 35mAir Canada

Deal found 3/25

$622

Mon 5/56:00 amLHR - IAD

1 stop13h 35mAustrian Airlines

Sat 5/105:50 pmIAD - LHR

2 stops45h 50mAustrian Airlines

Deal found 3/25

$634

Thu 4/2410:30 amLHR - DCA

2 stops15h 38mMultiple Airlines

Wed 4/3012:55 pmDCA - LHR

2 stops12h 35mMultiple Airlines

Deal found 3/24

$663

Fri 4/258:40 amLHR - IAD

3 stops18h 44mMultiple Airlines

Sun 4/272:00 pmIAD - LHR

2 stops15h 00mMultiple Airlines

Deal found 3/25

$664

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 March 26, 2025.

Wed 4/239:25 pmLHR - BWI

1 stop25h 15mMultiple Airlines

Wed 4/306:50 pmBWI - LHR

2 stops21h 45mMultiple Airlines

Deal found 3/24

$559

Thu 4/249:25 pmLHR - BWI

1 stop27h 00mIcelandair

Wed 4/308:30 pmBWI - LHR

1 stop10h 25mIcelandair

Deal found 3/25

$560

Wed 5/146:40 amLHR - IAD

1 stop18h 19mScandinavian Airlines

Wed 10/810:05 pmIAD - LHR

1 stop18h 35mScandinavian Airlines

Deal found 3/25

$565

Wed 5/78:25 amLHR - DCA

1 stop14h 35mJetBlue

Thu 5/156:09 amDCA - LHR

1 stop9h 36mJetBlue

Deal found 3/25

$576

Sat 5/36:00 pmLHR - IAD

1 stop18h 10mLufthansa

Sat 5/246:35 pmIAD - LHR

Nonstop7h 20mLufthansa

Deal found 3/25

$589

Wed 6/118:40 amLHR - DCA

2 stops30h 39mAir Canada

Wed 6/186:00 amDCA - LHR

3 stops21h 35mAir Canada

Deal found 3/25

$622

Mon 5/56:00 amLHR - IAD

1 stop13h 35mAustrian Airlines

Sat 5/105:50 pmIAD - LHR

2 stops45h 50mAustrian Airlines

Deal found 3/25

$634

Fri 5/28:40 amLHR - IAD

1 stop11h 55mKLM

Sun 5/115:50 pmIAD - LHR

Nonstop7h 30mKLM

Deal found 3/25

$669

Fri 5/29:45 amLHR - DCA

1 stop11h 11mAmerican Airlines

Sat 5/102:54 pmDCA - LHR

1 stop14h 21mAmerican Airlines

Deal found 3/25

$680

Fri 5/27:40 amLHR - IAD

1 stop13h 10mBritish Airways

Mon 5/55:40 pmIAD - LHR

Nonstop7h 35mBritish Airways

Deal found 3/26

$682

Thu 6/191:00 pmLHR - DCA

1 stop13h 38mUnited Airlines

Wed 6/252:00 pmDCA - LHR

1 stop11h 20mUnited Airlines

Deal found 3/25

$685

Tue 4/228:05 pmLHR - IAD

1 stop25h 10mSWISS

Tue 4/298:45 pmIAD - LHR

1 stop16h 05mSWISS

Deal found 3/26

$691

Last-minute flights from Heathrow to Washington, D.C.
Discover last-minute flight deals from Heathrow to Washington, D.C.. Data last updated March 26, 2025 and is based on user searches.

Tue 4/19:25 pmLHR - BWI

1 stop27h 00mIcelandair

Wed 10/18:30 pmBWI - LHR

1 stop10h 25mIcelandair

Deal found 3/25

$624

Tue 4/19:25 pmLHR - BWI

2 stops31h 33mMultiple Airlines

Tue 4/810:45 pmBWI - LHR

2 stops32h 10mMultiple Airlines

Deal found 3/25

$643

Tue 4/19:25 pmLHR - IAD

1 stop26h 55mIcelandair

Wed 10/18:30 pmIAD - LHR

1 stop10h 25mIcelandair

Deal found 3/25

$678

Tue 4/18:25 amLHR - DCA

1 stop13h 33mJetBlue

Thu 5/226:09 amDCA - LHR

1 stop9h 36mJetBlue

Deal found 3/24

$734

Tue 4/19:25 pmLHR - DCA

2 stops23h 35mIcelandair

Tue 4/83:45 pmDCA - LHR

2 stops23h 35mIcelandair

Deal found 3/25

$745

Tue 4/12:05 pmLHR - DCA

1 stop12h 03mAir Canada

Tue 4/84:10 pmDCA - LHR

1 stop9h 20mAir Canada

Deal found 3/25

$779

Wed 4/21:25 pmLHR - IAD

1 stop11h 05mBritish Airways

Tue 4/2210:40 pmIAD - LHR

Nonstop7h 25mBritish Airways

Deal found 3/25

$750

Wed 4/28:40 amLHR - IAD

1 stop12h 35mUnited Airlines

Thu 5/110:15 pmIAD - LHR

Nonstop7h 25mUnited Airlines

Deal found 3/25

$767

Wed 4/24:35 pmLHR - BWI

Nonstop8h 00mBritish Airways

Tue 4/229:20 pmBWI - LHR

Nonstop7h 15mBritish Airways

Deal found 3/25

$779

Wed 4/26:50 amLHR - IAD

2 stops14h 18mAir Canada

Tue 4/84:07 pmIAD - LHR

1 stop12h 53mAir Canada

Deal found 3/25

$780

Thu 4/38:40 amLHR - IAD

1 stop12h 35mMultiple Airlines

Wed 4/306:30 pmIAD - LHR

Nonstop7h 25mMultiple Airlines

Deal found 3/25

$744

Fri 4/46:40 amLHR - IAD

1 stop18h 19mScandinavian Airlines

Mon 9/2910:05 pmIAD - LHR

1 stop14h 35mScandinavian Airlines

Deal found 3/25

$656

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 March 26, 2025.

Thu 5/87:35 amLHR - BWI

1 stop15h 05mMultiple Airlines

Deal found 3/25

$325

Tue 6/107:40 amLHR - DCA

2 stops15h 23mMultiple Airlines

Deal found 3/25

$399

Mon 5/59:40 pmLHR - IAD

3 stops46h 40mMultiple Airlines

Deal found 3/25

$400

Thu 5/88:00 amLHR - IAD

1 stop17h 50mTAP AIR PORTUGAL

Deal found 3/25

$435

Wed 6/182:10 pmLHR - BWI

2 stops38h 31mWestJet

Deal found 3/25

$531

Mon 5/59:25 pmLHR - BWI

1 stop27h 00mIcelandair

Deal found 3/25

$567

Wed 4/239:50 amLHR - IAD

1 stop11h 00mAer Lingus

Deal found 3/24

$577

Sun 4/279:25 pmLHR - IAD

1 stop26h 55mIcelandair

Deal found 3/25

$580

Sat 6/216:40 amLHR - IAD

1 stop18h 19mScandinavian Airlines

Deal found 3/26

$601

Tue 4/19:25 pmLHR - DCA

2 stops23h 35mIcelandair

Deal found 3/25

$624

Tue 8/2612:15 pmLHR - IAD

Nonstop8h 20mLufthansa

Deal found 3/25

$637

Fri 4/182:10 pmLHR - IAD

3 stops26h 13mWestJet

Deal found 3/25

$638

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

Wed 4/23

9:25 pm-5:40 pm

1 stop25h 15m

Baltimore/Washington

Wed 4/30

6:50 pm-9:35 pm

2 stops21h 45m

$559

LondonBaltimore

LHR - BWI

LHRBWI

London Heathrow

Thu 4/24

9:25 pm-7:25 pm

1 stop27h 00m

Baltimore/Washington

Wed 4/30

8:30 pm-11:55 am

1 stop10h 25m

$560

LondonWashington, D.C.

LHR - DCA

LHRDCA

London Heathrow

Sat 5/24

12:40 pm-12:01 pm

1 stop28h 21m

Washington, D.C. Reagan-National

Sat 5/31

6:00 am-8:40 pm

1 stop9h 40m

$561

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Wed 5/14

6:40 am-7:59 pm

1 stop18h 19m

Washington, D.C. Dulles Intl

Wed 10/8

10:05 pm-9:40 pm

1 stop18h 35m

$565

LondonWashington, D.C.

LHR - DCA

LHRDCA

London Heathrow

Wed 4/30

8:25 am-4:55 pm

1 stop13h 30m

Washington, D.C. Reagan-National

Tue 5/6

10:10 am-6:30 am

1 stop15h 20m

$565

LondonWashington, D.C.

LHR - DCA

LHRDCA

London Heathrow

Wed 5/7

8:25 am-4:55 pm

1 stop13h 30m

Washington, D.C. Reagan-National

Wed 5/14

6:09 am-8:45 pm

1 stop9h 36m

$575

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Sat 5/3

6:30 am-1:30 pm

1 stop12h 00m

Washington, D.C. Dulles Intl

Sat 5/24

10:23 pm-8:35 am

2 stops29h 12m

$589

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Fri 4/25

9:25 pm-7:20 pm

1 stop26h 55m

Washington, D.C. Dulles Intl

Tue 4/29

8:30 pm-11:55 am

1 stop10h 25m

$594

LondonWashington, D.C.

LHR - DCA

LHRDCA

London Heathrow

Wed 6/11

8:40 am-10:19 am

2 stops30h 39m

Washington, D.C. Reagan-National

Wed 6/18

6:00 am-8:35 am

3 stops21h 35m

$622

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Mon 5/5

6:00 am-2:35 pm

1 stop13h 35m

Washington, D.C. Dulles Intl

Sat 5/10

5:50 pm-8:40 pm

2 stops45h 50m

$634

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/25

Showing 1-10 of 55 results

...

Compare providers for flights from Heathrow to Washington, D.C.

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Heathrow to Washington, D.C. in March.

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy1 star	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*3 stars
eDreams	Price Accuracy3 stars	Trust Score*3 stars
Cheapflightsfares	Price Accuracy3 stars	Trust Score*2 stars
Flightnetwork	Price Accuracy2 stars	Trust Score*3 stars
oojo	Price Accuracy3 stars	Trust Score*2 stars
AranGrant	Price Accuracy3 stars	Trust Score*1 star
Thrive Travel	Price Accuracy3 stars	Trust Score*2 stars
Kiwi.com	Price Accuracy3 stars	Trust Score*2 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. 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. flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from London Heathrow Airport-Washington, D.C. 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. 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. 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. 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, arrive early to enjoy lounges like the Virgin Atlantic Clubhouse and avoid long security lines.

IAD

Upon arrival at IAD, the Silver Line Metro offers a cost-effective way to reach downtown Washington, D.C. in under 40 minutes.

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 52 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 $309). Flying from London Heathrow Airport to Washington, D.C. in June is currently the most expensive (average of $387). 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 20% versus a flight in the afternoon.

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 Sunday at noon when fares are most often at their lowest. Thursday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Rainfall in Washington, D.C. by month

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.

Temperature in Washington, D.C. by month

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).

Reviews of airlines servicing Washington, D.C.

Peruse reviews from past customers who have flown with Delta, KLM and LOT from London to Washington, D.C. to help guide your decision. 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

7,891 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

7,891 reviews

Delta

8.0

Very good

7,891 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

1,318 reviews

Delta

8.0

Very good

7,891 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

LOT

7.6

Good

1,061 reviews

Delta

8.0

Very good

7,891 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

1,266 reviews

Delta

8.0

Very good

7,891 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

7.5

Good

769 reviews

Delta

8.0

Very good

7,891 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. round-trip?
Currently priced at $560, Icelandair will fly you from London Heathrow Airport to Washington, D.C. and back. In addition to Icelandair, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Scandinavian Airlines and JetBlue - these airlines can fly you to your destination from $565 and $576, respectively. Icelandair is 30% 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 $435. Users have also found prices from $531 and $567 on WestJet 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 (90%), Air France (90%), Delta (90%).
What are the cheapest flights from London Heathrow Airport to Washington, D.C.?
Looking at all options, your cheapest flight can be booked for $619. While the most popular route (London Heathrow - Washington, D.C. Dulles Intl) can be booked for $221 on average our data indicates $1,588 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 $309). Flying from London Heathrow Airport to Washington, D.C. in June is currently the most expensive (average of $387). 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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Arlington

Alexandria

Fairfax

Tysons

Springfield

Rockville

Woodbridge

Gaithersburg

Fredericksburg

Linthicum Heights

Silver Spring

Falls Church

Laurel

Easton

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Gettysburg

National Harbor

Oxon Hill

Reston

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

Airline	Cheapest	Average	Flexibility	On-time
Scandinavian Airlines	Cheapest$390	Average$784	FlexibilityNo cancel fee	On-time77%
PLAY	Cheapest$392	Average$560	FlexibilityNo cancel fee	On-timeN/A
Delta	Cheapest$475	Average$953	FlexibilityNo cancel fee	On-timeN/A
Icelandair	Cheapest$529	Average$1,004	FlexibilityNo cancel fee	On-time76%
TAP AIR PORTUGAL	Cheapest$564	Average$804	FlexibilityNo cancel fee	On-timeN/A
Iberia	Cheapest$586	Average$1,021	FlexibilityNo cancel fee	On-time77%
British Airways	Cheapest$594	Average$894	FlexibilityNo cancel fee	On-time70%
American Airlines	Cheapest$619	Average$839	FlexibilityNo cancel fee	On-time71%
Aer Lingus	Cheapest$660	Average$823	FlexibilityNo cancel fee	On-timeN/A
Lufthansa	Cheapest$691	Average$941	FlexibilityNo cancel fee	On-time76%

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$325+ 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 5/8. 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 January, booked 52 days in advance, depart on a Tuesday or Thursday and return on a Tuesday

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

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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 March 26, 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 March 26, 2025.

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

Compare providers for flights from Heathrow to Washington, D.C.

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 Washington, D.C. in March.

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

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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 March 21, 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 March 26, 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.

Rainfall in Washington, D.C. by month

Plan your trip to Washington, D.C. by taking into account the average rainfall totals by month.

Temperature in Washington, D.C. by month

Plan your trip to Washington, D.C. by taking into account the average temperature totals by month.

Reviews of airlines servicing Washington, D.C.

Peruse reviews from past customers who have flown with Delta, KLM and LOT from London to Washington, D.C. to help guide your decision. 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 Washington, D.C.. 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. 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 London Heathrow Airport?

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Alternative routes for Heathrow to 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 March 26, 2025.