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

Flying on PLAY is currently your cheapest option to Washington, D.C., with prices starting at $542. Additional round-trip tickets that might be worth considering are offered by Icelandair and Scandinavian Airlines, with the lowest prices starting at $630 and $632, respectively. These flights start at 26% lower than the current average price 3 months from now.

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

One-way options have recently been found by users for as low as $352 on PLAY. Other airlines that offer cheap prices include TAP AIR PORTUGAL from $445 and WestJet from $467 one-way.

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

While some choose either London Heathrow - Baltimore/Washington or London Heathrow - Washington, D.C. Reagan-National, London Heathrow - Washington, D.C. Dulles Intl is the most popular route from London to Washington, D.C..

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

Looking at all options, your cheapest flight can be booked for $484. While the most popular route (London Heathrow - Washington, D.C. Dulles Intl) can be booked for $565 on average our data indicates $1,589 when flying from London to Washington, D.C..

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

Before booking your flight to Washington, D.C. from London, check out the most reliable airlines to get you to your destination on time: United Airlines (92%), Air Canada (90%), Austrian Airlines( 90%).

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

When booking a flight from London 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 to Washington, D.C.?

It’s generally more expensive to depart on a Monday, if you have to leave on this day you can still search on Cheapflights to find great options that meet your needs.

How far in advance should I book a flight from London to Washington, D.C.?

Find a great deal and save up to 34% by booking at least 50 days prior to your desired departure date, rather than waiting until the week of travel. According to our data, there are a number of flights available from London to Washington, D.C. within the next two weeks, with the cheapest ticket starting at $722.

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

February is one of the best times of the year to fly to Washington, D.C. from London. Prices for February average $735 per person but you can even find prices for as low as $305. The most expensive prices can be found in the month of July. Opting for a February flight can save you 17% on your journey compared to booking in July

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

Most trusted provider : When it comes to deals on London-Washington, D.C. flights, Cheapflights users trust AranGrant the most. AranGrant 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-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 London to Washington, D.C. that include hotel bookings?

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

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

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

Yes. Cheapflights offers flight deals from London 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.

$329+ Flights from London to Washington, D.C.

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Find cheap flights from London 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 to Washington, D.C. are usually found in February or September, booked 70 days in advance, depart on a Tuesday or Thursday and return on a Wednesday

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

Most accurate provider	AranGrant 3 stars
Most trusted provider	AranGrant 3 stars
Round-trip from	$542 (Mytrip)
One-way from	$329 (Kiwi.com)
Popular in	July
Cheapest in	February
Average price	$710
Good round-trip deal	$730 or less
Good one-way deal	$668 or less

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

Search Deals

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

Search Deals

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

Search Deals

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

Search Deals

Highest demand for flights based on searches. 11% potential increase in price ($99 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 1% potential price decrease ($12 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 (LON) to Washington, D.C. (WAS).

Search Deals

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

Search Deals

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

Cheapest flights from London to Washington, D.C.
Explore the most affordable flight options available from London to Washington, D.C.. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 29, 2025.

Fri 5/911:40 amSTN - BWI

1 stop11h 00mPLAY

Sat 5/106:50 pmBWI - STN

1 stop10h 50mPLAY

Deal found 4/29

$542

Mon 5/53:40 pmLGW - BWI

1 stop32h 45mIcelandair

Mon 5/128:30 pmBWI - LGW

1 stop13h 05mIcelandair

Deal found 4/29

$542

Tue 10/288:00 amLGW - BWI

1 stop13h 55mMultiple Airlines

Thu 11/136:05 pmBWI - LGW

1 stop16h 30mMultiple Airlines

Deal found 4/29

$545

Mon 5/59:25 pmLHR - BWI

1 stop27h 00mIcelandair

Mon 5/128:30 pmBWI - LHR

1 stop10h 25mIcelandair

Deal found 4/29

$546

Tue 5/2010:35 pmSTN - BWI

2 stops25h 50mMultiple Airlines

Tue 5/278:30 pmBWI - STN

2 stops12h 50mMultiple Airlines

Deal found 4/29

$572

Sat 11/17:35 amLHR - BWI

1 stop14h 20mMultiple Airlines

Sun 11/96:05 pmBWI - LHR

2 stops16h 55mMultiple Airlines

Deal found 4/29

$619

Sat 6/1410:00 amLGW - IAD

1 stop13h 30mMultiple Airlines

Sun 8/1710:20 pmIAD - LGW

1 stop11h 50mMultiple Airlines

Deal found 4/28

$628

Fri 5/91:05 pmLHR - IAD

1 stop11h 15mIcelandair

Mon 5/128:30 pmIAD - LHR

1 stop10h 25mIcelandair

Deal found 4/28

$630

Thu 11/68:25 amLHR - DCA

1 stop12h 35mJetBlue

Mon 11/103:10 pmDCA - LHR

1 stop9h 45mJetBlue

Deal found 4/28

$631

Fri 9/56:40 amLHR - IAD

1 stop18h 19mScandinavian Airlines

Thu 9/2510:05 pmIAD - LHR

1 stop12h 55mScandinavian Airlines

Deal found 4/28

$632

Mon 5/59:00 amLTN - IAD

2 stops15h 20mMultiple Airlines

Sun 5/118:30 pmIAD - LTN

2 stops14h 10mMultiple Airlines

Deal found 4/28

$632

Sat 5/246:50 amLHR - IAD

1 stop11h 40mLufthansa

Sat 5/3110:11 pmIAD - LHR

1 stop32h 39mLufthansa

Deal found 4/28

$636

Best flights from London to Washington, D.C.
Discover carefully curated flight deals from London to Washington, D.C. that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 29, 2025.

Fri 5/911:40 amSTN - BWI

1 stop11h 00mPLAY

Sat 5/106:50 pmBWI - STN

1 stop10h 50mPLAY

Deal found 4/29

$542

Mon 5/121:00 pmLGW - BWI

2 stops23h 31mMultiple Airlines

Tue 7/152:59 pmBWI - LGW

1 stop14h 01mMultiple Airlines

Deal found 4/29

$558

Fri 5/91:05 pmLHR - IAD

1 stop11h 15mIcelandair

Mon 5/128:30 pmIAD - LHR

1 stop10h 25mIcelandair

Deal found 4/28

$630

Fri 9/56:40 amLHR - IAD

1 stop18h 19mScandinavian Airlines

Thu 9/2510:05 pmIAD - LHR

1 stop12h 55mScandinavian Airlines

Deal found 4/28

$632

Thu 5/227:30 amLHR - IAD

1 stop12h 45mLufthansa

Sat 5/3110:11 pmIAD - LHR

1 stop30h 24mLufthansa

Deal found 4/28

$635

Fri 9/512:10 pmLGW - DCA

1 stop13h 41mJetBlue

Sat 9/276:55 pmDCA - LGW

1 stop9h 40mJetBlue

Deal found 4/28

$638

Fri 5/91:45 pmLHR - IAD

1 stop31h 30mUnited Airlines

Sat 5/107:59 pmIAD - LHR

1 stop32h 41mUnited Airlines

Deal found 4/29

$651

Thu 10/2310:35 amLGW - IAD

1 stop15h 15mTAP AIR PORTUGAL

Sat 11/16:30 pmIAD - LGW

1 stop11h 20mTAP AIR PORTUGAL

Deal found 4/28

$654

Fri 5/98:30 amLHR - IAD

1 stop34h 40mAustrian Airlines

Sat 5/105:50 pmIAD - LHR

1 stop36h 20mAustrian Airlines

Deal found 4/29

$664

Mon 6/26:50 amLHR - IAD

3 stops33h 24mAir Canada

Tue 6/103:30 pmIAD - LHR

1 stop13h 05mAir Canada

Deal found 4/28

$669

Fri 9/56:40 pmLGW - IAD

1 stop26h 35mSWISS

Tue 9/238:45 pmIAD - LGW

1 stop16h 05mSWISS

Deal found 4/28

$706

Fri 5/99:00 amLHR - IAD

1 stop12h 20mVirgin Atlantic

Fri 5/1612:25 pmIAD - LHR

1 stop13h 00mVirgin Atlantic

Deal found 4/28

$707

Last-minute flights from London to Washington, D.C.
Discover last-minute flight deals from London to Washington, D.C.. Data last updated April 29, 2025 and is based on user searches.

Mon 5/53:40 pmLGW - BWI

1 stop32h 45mIcelandair

Mon 5/128:30 pmBWI - LGW

1 stop13h 05mIcelandair

Deal found 4/29

$542

Mon 5/59:25 pmLHR - BWI

1 stop27h 00mIcelandair

Mon 5/128:30 pmBWI - LHR

1 stop10h 25mIcelandair

Deal found 4/29

$546

Mon 5/56:25 amSTN - BWI

2 stops16h 15mMultiple Airlines

Tue 5/136:50 pmBWI - STN

2 stops23h 05mMultiple Airlines

Deal found 4/28

$554

Mon 5/58:40 amLGW - BWI

2 stops14h 00mMultiple Airlines

Tue 5/136:50 pmBWI - LGW

2 stops20h 25mMultiple Airlines

Deal found 4/29

$626

Mon 5/59:00 amLTN - IAD

2 stops15h 20mMultiple Airlines

Sun 5/118:30 pmIAD - LTN

2 stops14h 10mMultiple Airlines

Deal found 4/28

$632

Mon 5/59:45 amLGW - IAD

2 stops14h 35mMultiple Airlines

Tue 5/138:30 pmIAD - LGW

2 stops13h 40mMultiple Airlines

Deal found 4/28

$637

Thu 5/81:00 pmLGW - IAD

1 stop11h 20mIcelandair

Wed 5/148:30 pmIAD - LGW

1 stop13h 10mIcelandair

Deal found 4/29

$640

Thu 5/810:55 pmSTN - IAD

2 stops22h 20mMultiple Airlines

Sun 5/1810:20 pmIAD - STN

2 stops17h 55mMultiple Airlines

Deal found 4/28

$646

Fri 5/911:40 amSTN - BWI

1 stop11h 00mPLAY

Sat 5/106:50 pmBWI - STN

1 stop10h 50mPLAY

Deal found 4/29

$542

Fri 5/91:05 pmLHR - IAD

1 stop11h 15mIcelandair

Mon 5/128:30 pmIAD - LHR

1 stop10h 25mIcelandair

Deal found 4/28

$630

Fri 5/91:45 pmLHR - IAD

1 stop31h 30mUnited Airlines

Sat 5/107:59 pmIAD - LHR

1 stop32h 41mUnited Airlines

Deal found 4/29

$651

Fri 5/98:30 amLHR - IAD

1 stop34h 40mAustrian Airlines

Sat 5/105:50 pmIAD - LHR

1 stop36h 20mAustrian Airlines

Deal found 4/29

$664

One-way flights from London to Washington, D.C.
Search for one-way flight options from London to Washington, D.C.. Find affordable one-way fares based on user searches. Data last updated April 29, 2025.

Sat 6/710:15 pmSTN - BWI

2 stops48h 25mMultiple Airlines

Deal found 4/28

$329

Wed 5/72:00 pmLGW - BWI

1 stop26h 46mMultiple Airlines

Deal found 4/29

$345

Fri 5/99:25 pmLHR - BWI

1 stop25h 15mMultiple Airlines

Deal found 4/29

$349

Wed 10/811:40 amSTN - BWI

1 stop11h 00mPLAY

Deal found 4/28

$352

Fri 5/910:00 amLGW - IAD

2 stops35h 34mMultiple Airlines

Deal found 4/29

$425

Sat 5/319:15 pmSTN - IAD

2 stops47h 05mMultiple Airlines

Deal found 4/29

$425

Thu 5/86:40 amLTN - IAD

2 stops19h 10mMultiple Airlines

Deal found 4/28

$426

Fri 6/1310:00 pmLGW - DCA

3 stops28h 53mMultiple Airlines

Deal found 4/28

$429

Mon 5/198:50 pmLHR - IAD

2 stops23h 30mMultiple Airlines

Deal found 4/28

$432

Wed 5/78:00 amLHR - IAD

1 stop12h 20mTAP AIR PORTUGAL

Deal found 4/27

$445

Tue 5/64:25 pmLGW - IAD

1 stop27h 55mTAP AIR PORTUGAL

Deal found 4/29

$449

Tue 5/132:10 pmLHR - IAD

1 stop32h 44mWestJet

Deal found 4/29

$467

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

LondonBaltimore

STN - BWI

STNBWI

London Stansted

Fri 5/9

11:40 am-5:40 pm

1 stop11h 00m

Baltimore/Washington

Sat 5/10

6:50 pm-10:40 am

1 stop10h 50m

$542

LondonBaltimore

LGW - BWI

LGWBWI

London Gatwick

Mon 5/12

1:00 pm-7:31 am

2 stops23h 31m

Baltimore/Washington

Tue 7/15

2:59 pm-10:00 am

1 stop14h 01m

$558

LondonBaltimore

STN - BWI

STNBWI

London Stansted

Tue 5/20

10:35 pm-7:25 pm

2 stops25h 50m

Baltimore/Washington

Tue 5/27

8:30 pm-2:20 pm

2 stops12h 50m

$572

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Sat 6/14

10:00 am-6:30 pm

1 stop13h 30m

Washington, D.C. Dulles Intl

Sun 8/17

10:20 pm-3:10 pm

1 stop11h 50m

$628

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Fri 5/9

1:05 pm-7:20 pm

1 stop11h 15m

Washington, D.C. Dulles Intl

Mon 5/12

8:30 pm-11:55 am

1 stop10h 25m

$630

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Fri 9/5

6:40 am-7:59 pm

1 stop18h 19m

Washington, D.C. Dulles Intl

Thu 9/25

10:05 pm-4:00 pm

1 stop12h 55m

$632

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Thu 5/22

7:30 am-3:15 pm

1 stop12h 45m

Washington, D.C. Dulles Intl

Sat 5/31

10:11 pm-9:35 am

1 stop30h 24m

$635

LondonWashington, D.C.

LGW - DCA

LGWDCA

London Gatwick

Fri 9/5

12:10 pm-8:51 pm

1 stop13h 41m

Washington, D.C. Reagan-National

Sat 9/27

6:55 pm-9:35 am

1 stop9h 40m

$638

LondonWashington, D.C.

LHR - DCA

LHRDCA

London Heathrow

Fri 9/5

8:25 am-4:13 pm

1 stop12h 48m

Washington, D.C. Reagan-National

Thu 9/25

6:30 am-8:45 pm

1 stop9h 15m

$640

LondonWashington, D.C.

LHR - DCA

LHRDCA

London Heathrow

Wed 5/14

8:15 am-10:58 pm

1 stop19h 43m

Washington, D.C. Reagan-National

Sun 5/18

6:00 am-9:30 am

1 stop22h 30m

$647

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/28

Showing 1-10 of 60 results

...

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

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

Provider	Price Accuracy	Trust Score*
eDreams	Price Accuracy3 stars	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*2 stars
AranGrant	Price Accuracy3 stars	Trust Score*3 stars
Mytrip	Price Accuracy3 stars	Trust Score*3 stars
OneTravel	Price Accuracy2 stars	Trust Score*3 stars
Cheapflightsfares	Price Accuracy3 stars	Trust Score*2 stars
Priceline	Price Accuracy2 stars	Trust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

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

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

Airlines

British Airways

BA's Club Suite offers private pods with doors for enhanced privacy on long-haul flights.

BA's World Traveller Plus provides extra seat width, legroom, and upgraded service on long-haul flights.

Read more about British Airwaysby Gabriel Leigh

United Airlines

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

United's Premium Plus offers bigger seats, extra legroom, and upgraded meals on international flights.

Read more about United Airlinesby Harriet Baskas

Airports

LHR

Heathrow's strict security means long lines; ensure liquids are in one bag to avoid delays. Allow extra time for terminal changes.

IAD

At IAD, use the Silver Line Metro for a cost-effective ride to Washington, D.C. It takes less than 40 minutes to reach the city.

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 London to Washington, D.C.

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

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

To ensure you get the cheapest price possible for a flight from London to Washington, D.C., you should look to book at least 70 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

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

Currently, August is the cheapest month in which you can book a flight from London to Washington, D.C. (average of $309). Flying from London to Washington, D.C. in June is currently the most expensive (average of $373). 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 LON to WAS?

A simple way to save on the total cost of your ticket is to fly from London to Washington, D.C. in the evening. If you’re flexible enough to do this you can expect to save up to 18% on your trip compared to booking a flight in the afternoon.

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

Travelers seeking maximum savings on their London to Washington, D.C. 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 to Washington, D.C.

The most flights from LON to WAS are scheduled on a Monday (27 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (16 on average).

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 Finnair from London to Washington, D.C. to help guide your decision. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Delta

8.0

Very good

7,929 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

7,929 reviews

Delta

8.0

Very good

7,929 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

1,334 reviews

Delta

8.0

Very good

7,929 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

1,275 reviews

Delta

8.0

Very good

7,929 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

780 reviews

Delta

8.0

Very good

7,929 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

1,588 reviews

Delta

8.0

Very good

7,929 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 to Washington, D.C. round-trip?
Flying on PLAY is currently your cheapest option to Washington, D.C., with prices starting at $542. Additional round-trip tickets that might be worth considering are offered by Icelandair and Scandinavian Airlines, with the lowest prices starting at $630 and $632, respectively. These flights start at 26% lower than the current average price 3 months from now.
What are the cheapest airlines to fly from London to Washington, D.C. one-way?
One-way options have recently been found by users for as low as $352 on PLAY. Other airlines that offer cheap prices include TAP AIR PORTUGAL from $445 and WestJet from $467 one-way.
What are the most popular routes from London to Washington, D.C.?
While some choose either London Heathrow - Baltimore/Washington or London Heathrow - Washington, D.C. Reagan-National, London Heathrow - Washington, D.C. Dulles Intl is the most popular route from London to Washington, D.C..
What are the most reliable airlines from London to Washington, D.C.?
Before booking your flight to Washington, D.C. from London, check out the most reliable airlines to get you to your destination on time: United Airlines (92%), Air Canada (90%), Austrian Airlines( 90%).
What are the cheapest flights from London to Washington, D.C.?
Looking at all options, your cheapest flight can be booked for $484. While the most popular route (London Heathrow - Washington, D.C. Dulles Intl) can be booked for $565 on average our data indicates $1,589 when flying from London to Washington, D.C..
Can I find deals for flights from London to Washington, D.C. that include hotel bookings?
Yes. In addition to deals on London to Washington, D.C. flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from London 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 London to Washington, D.C..
Can I find deals for business class flights from London to Washington, D.C.?
Yes. Cheapflights offers flight deals from London 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 to Washington, D.C.?
Currently, August is the cheapest month in which you can book a flight from London to Washington, D.C. (average of $309). Flying from London to Washington, D.C. in June is currently the most expensive (average of $373). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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

Airline	Cheapest	Average	Flexibility	On-time
PLAY	Cheapest$304	Average$458	FlexibilityNo cancel fee	On-timeN/A
Scandinavian Airlines	Cheapest$390	Average$833	FlexibilityNo cancel fee	On-time77%
Austrian Airlines	Cheapest$431	Average$986	FlexibilityNo cancel fee	On-time78%
Icelandair	Cheapest$486	Average$853	FlexibilityNo cancel fee	On-time76%
TAP AIR PORTUGAL	Cheapest$564	Average$814	FlexibilityNo cancel fee	On-timeN/A
Iberia	Cheapest$586	Average$1,021	FlexibilityNo cancel fee	On-time77%
British Airways	Cheapest$595	Average$875	FlexibilityNo cancel fee	On-time70%
American Airlines	Cheapest$619	Average$829	FlexibilityNo cancel fee	On-time71%
Delta	Cheapest$652	Average$951	FlexibilityNo cancel fee	On-timeN/A
Aer Lingus	Cheapest$660	Average$809	FlexibilityNo cancel fee	On-timeN/A

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$329+ Cheap flights from London (LON) 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 6/7. 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 to Washington, D.C. are usually found in February or September, booked 70 days in advance, depart on a Tuesday or Thursday and return on a Wednesday

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Cheapest flights from London to Washington, D.C.Explore the most affordable flight options available from London to Washington, D.C.. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 29, 2025.

Explore the most affordable flight options available from London to Washington, D.C.. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 29, 2025.

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

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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 London to Washington, D.C. in April.

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

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

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

Have a flexible travel schedule? Discover the best time to fly to Washington, D.C. from London with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from London to Washington, D.C.

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

Use this chart to determine the optimal time to book a round-trip flight from London to Washington, D.C.. Price data was last updated on April 25, 2025.

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

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

Find hourly flight availability from London 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 April 29, 2025.

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

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

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

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 Finnair from London to Washington, D.C. to help guide your decision. In addition to providing an overall rating, users have also rated airlines 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 London 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 to Washington, D.C. round-trip?

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

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

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

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

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

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

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

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

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Cheapest flights from London to Washington, D.C.
Explore the most affordable flight options available from London to Washington, D.C.. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 29, 2025.