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Cheap flights from London to Washington, D.C. from £233

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 18/5. Fares are subject to change and may not be available on all flights or dates of travel.
LON — WAS
1 Apr — 8 Apr1
1 adult

Cheapflights Tip: The best prices from London to Washington, D.C. are usually found in February or September, booked 82 days in advance, depart on a Wednesday or Tuesday and return on a Monday

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

Discover tips and strategies to find the most affordable flight options for your journey from London (LON) to Washington, D.C. (WAS). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 27 March 2025.

Round-trip from

£353

One-way from

£236

Popular in

July

Cheapest in

February

Average price

£526

Good round-trip deal

£542 or less

Good one-way deal

£632 or less
PLAY
  • PLAY
  • 3/5-12/5
  • 2 total stops
  • 21h 50m total
  • London to Washington, D.C.
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2/5
  • 2/5
  • 2 total stops
  • 15h 56m total
  • London to Washington, D.C.
Search Deals
Highest demand for flights based on searches. 12% potential increase in price (£62 potential increase over avg. return price).
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Cheapest flight prices on average. 1% potential price decrease (£8 potential savings vs. average return price).
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Average for round-trip flights in March 2025
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Price to beat on a round-trip flight from London (LON) to Washington, D.C. (WAS).
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Price to beat on a one-way flight from London (LON) to Washington, D.C. (WAS).
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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 27 March 2025.

Sat 3/511:40STN - BWI
1 stop11h 00mPLAY
Mon 12/518:50BWI - STN
1 stop10h 50mPLAY
Deal found 26/3£353
Thu 10/414:50STN - BWI
2 stops31h 50mMultiple Airlines
Sat 19/418:50BWI - STN
2 stops13h 50mMultiple Airlines
Deal found 25/3£354
Tue 11/1108:00LGW - BWI
1 stop13h 55mMultiple Airlines
Tue 2/1218:05BWI - LGW
1 stop22h 05mMultiple Airlines
Deal found 26/3£360
Thu 24/406:40LHR - BWI
2 stops16h 00mMultiple Airlines
Fri 2/518:50BWI - LHR
2 stops16h 10mMultiple Airlines
Deal found 26/3£380
Thu 24/413:05LHR - BWI
1 stop11h 20mIcelandair
Wed 30/420:30BWI - LHR
1 stop18h 50mIcelandair
Deal found 26/3£425
Sat 3/515:40LGW - IAD
1 stop32h 40mIcelandair
Sun 11/520:30IAD - LGW
1 stop13h 10mIcelandair
Deal found 26/3£436
Thu 28/813:00LGW - BWI
1 stop11h 25mIcelandair
Fri 5/920:30BWI - LGW
1 stop10h 15mIcelandair
Deal found 26/3£436
Fri 19/906:40LHR - IAD
1 stop18h 19mScandinavian Airlines
Tue 7/1022:05IAD - LHR
1 stop12h 55mScandinavian Airlines
Deal found 26/3£438
Tue 6/510:45STN - IAD
1 stop13h 45mMultiple Airlines
Sun 11/517:20IAD - STN
1 stop12h 15mMultiple Airlines
Deal found 26/3£442
Sat 3/518:00LHR - IAD
1 stop18h 10mLufthansa
Sun 11/518:30IAD - LHR
Nonstop7h 25mLufthansa
Deal found 26/3£442
Wed 30/411:55LHR - DCA
1 stop16h 04mIcelandair
Tue 6/517:40DCA - LHR
1 stop31h 50mIcelandair
Deal found 27/3£446
Wed 7/508:25LHR - DCA
1 stop16h 35mJetBlue
Wed 14/506:09DCA - LHR
1 stop9h 36mJetBlue
Deal found 26/3£446

Cheapflights Fare Finder

Customise your flight search to find flights from London to Washington, D.C. that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 27 March 2025.
Use the filters below to find and compare flights from London to Washington, D.C. that are best for you.

Fly from

London

Fly to

Washington, D.C.

Route

Depart

Return

Price

LondonBaltimore

STN - BWI

STNBWI

London Stansted

Sat 3/5

11:40-17:40

1 stop11h 00m

Baltimore/Washington

Mon 12/5

18:50-10:40

1 stop10h 50m

£353

LondonBaltimore

STN - BWI

STNBWI

London Stansted

Thu 10/4

14:50-17:40

2 stops31h 50m

Baltimore/Washington

Sat 19/4

18:50-13:40

2 stops13h 50m

£354

LondonBaltimore

LGW - BWI

LGWBWI

London Gatwick

Thu 1/5

14:00-13:47

1 stop28h 47m

Baltimore/Washington

Fri 9/5

17:15-10:00

2 stops35h 45m

£372

LondonBaltimore

LHR - BWI

LHRBWI

London Heathrow

Thu 24/4

06:40-17:40

2 stops16h 00m

Baltimore/Washington

Fri 2/5

18:50-16:00

2 stops16h 10m

£380

LondonBaltimore

LHR - BWI

LHRBWI

London Heathrow

Thu 24/4

13:05-19:25

1 stop11h 20m

Baltimore/Washington

Wed 30/4

20:30-20:20

1 stop18h 50m

£425

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Sat 3/5

15:40-19:20

1 stop32h 40m

Washington, D.C. Dulles Intl

Sun 11/5

20:30-14:40

1 stop13h 10m

£436

LondonBaltimore

LGW - BWI

LGWBWI

London Gatwick

Thu 28/8

13:00-19:25

1 stop11h 25m

Baltimore/Washington

Fri 5/9

20:30-11:45

1 stop10h 15m

£436

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Fri 19/9

06:40-19:59

1 stop18h 19m

Washington, D.C. Dulles Intl

Tue 7/10

22:05-16:00

1 stop12h 55m

£438

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Tue 6/5

10:45-19:30

1 stop13h 45m

Washington, D.C. Dulles Intl

Sun 11/5

17:20-10:35

1 stop12h 15m

£442

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Sat 3/5

18:00-07:10

1 stop18h 10m

Washington, D.C. Dulles Intl

Sun 11/5

18:30-06:55

Nonstop7h 25m

£442

Flights are sorted by cheapest return flights first.

Deals found on 25/3

Showing 1-10 of 60 results
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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.
Estimated return 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.?

Use this chart to determine the optimal time to book a return flight from London to Washington, D.C.. Price data was last updated on 21 March 2025.

Booking 82 days in advance of your planned departure date is, on average, the best time to get cheap flights from London 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 to Washington, D.C.?

Currently, January is the cheapest month in which you can book a flight from London to Washington, D.C. (average of £599). Flying from London to Washington, D.C. in July is currently the most expensive (average of £947). 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?

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 27 March 2025.

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 23% on your trip compared to booking a flight in the afternoon.

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

Use this chart to determine the cheapest time to fly return from London to Washington, D.C.. Price data was last updated on 23 June 2024.

Travellers seeking maximum savings on their London to Washington, D.C. flight should consider departing on Tuesday evenings 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.

Rainfall in Washington, D.C. by month

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

In terms of precipitation, rainfall in Washington, D.C. ranges from 66.0 - 102.0 inches per month. May is typically the wettest month, when rainfall can reach 102.0 mm. February is typically the driest time to visit Washington, D.C. when rainfall is around 66.0 mm.

Temperature in Washington, D.C. by month

Plan your trip to Washington, D.C. by taking into account the average temperature totals 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 27.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 2.0 C).

Reviews of airlines servicing Washington, D.C.

Get insights into the airlines that provide service to Washington, D.C.. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Washington, D.C.. Reviews last updated 27 March 2025.
Get a feel of what it's like to fly with Delta, KLM and Air Transat from London to Washington, D.C. by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very Good
7,895 reviews
Check prices

Crew

8.5

Food

7.3

Overall

8.0

Entertainment

7.9

Boarding

8.2

Comfort

8.0

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
7,895 reviews
Delta
8.0
Very Good
7,895 reviews
Check prices

Crew

8.5

Food

7.3

Overall

8.0

Entertainment

7.9

Boarding

8.2

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
KLM
7.8
Good
1,321 reviews
Delta
8.0
Very Good
7,895 reviews
Check prices

Crew

8.5

Food

7.3

Overall

8.0

Entertainment

7.9

Boarding

8.2

Comfort

8.0

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
Air Transat
7.8
Good
381 reviews
Delta
8.0
Very Good
7,895 reviews
Check prices

Crew

8.5

Food

7.3

Overall

8.0

Entertainment

7.9

Boarding

8.2

Comfort

8.0

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
1,063 reviews
Delta
8.0
Very Good
7,895 reviews
Check prices

Crew

8.5

Food

7.3

Overall

8.0

Entertainment

7.9

Boarding

8.2

Comfort

8.0

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
1,267 reviews
Delta
8.0
Very Good
7,895 reviews
Check prices

Crew

8.5

Food

7.3

Overall

8.0

Entertainment

7.9

Boarding

8.2

Comfort

8.0

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

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?

    According to our current data, PLAY (£353), Icelandair (£425), and Lufthansa (£437) offers the cheapest pricing from London to Washington, D.C.. Users have found that PLAY is 37% cheaper than the other options available to this destination.

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

    For one-way options, check prices for PLAY. According to our data, you can fly for as low as £277. Users have also found prices from £325 and £336 on Air Transat and TAP AIR PORTUGAL, respectively.

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

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

  • What are the most reliable airlines from London 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 to Washington, D.C. on time: KLM (90%), Air France (90%), Delta (90%).

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

    While on average a flight from London to Washington, D.C. is generally £1,182, our data shows the cheapest flight currently is £479. When looking at the most popular route, (London Heathrow - Washington, D.C. Dulles Intl), you can expect to pay £171 for that flight.

  • Where are the most common stopover locations when flying from London to Washington, D.C.?

    Most of the time, London to Washington, D.C. flights that have stopovers will stop in Reykjavik.

  • What are some popular things to do or see while on a stopover in Reykjavik?

    If you're on a stopover in Reykjavik and looking for things to do, consider visiting National Cathedral, Hallgrímskirkja, or Harpa. Travelers on a layover in Reykjavik can visit National Cathedral, Hallgrímskirkja, and Harpa, by traveling 23.0 mi, 23.2 mi, and 23.3 mi, respectively after landing at Reykjavik Keflavik Intl. Travellers can book a car hire at Reykjavik Keflavik Intl for about £36 per day to make their sightseeing more efficient.

  • Where are the least popular stopover locations for London to Washington, D.C. flights?

    Flights departing from London and landing in Washington, D.C. stopover in Dublin least frequently.

  • 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 holiday 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, January is the cheapest month in which you can book a flight from London to Washington, D.C. (average of £599). Flying from London to Washington, D.C. in July is currently the most expensive (average of £947). 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

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Fly from London to Washington, D.C. on these airlines

Choose from the following airlines for your flight from London to Washington, D.C.. Flights are based on user searches made on Cheapflights and were last updated on 27 March 2025.
PLAY flights from London to Washington, D.C.
British Airways flights from London to Washington, D.C.
Virgin Atlantic flights from London to Washington, D.C.
Finnair flights from London to Washington, D.C.

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

Discover the top 10 airlines that operate flights from London to Washington, D.C.. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 27 March 2025.
AirlineCheapestAverageFlexibilityOn-time
PLAYCheapest£274Average£485FlexibilityNo cancel feeOn-timeN/A
Search PLAY flights
DeltaCheapest£332Average£791FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
IcelandairCheapest£361Average£555FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
TAP AIR PORTUGALCheapest£365Average£623FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
Brussels AirlinesCheapest£396Average£744FlexibilityNo cancel feeOn-timeN/A
Search Brussels Airlines flights
JetBlueCheapest£397Average£594FlexibilityNo cancel feeOn-time62%
Search JetBlue flights
Scandinavian AirlinesCheapest£456Average£596FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
Air FranceCheapest£457Average£632FlexibilityNo cancel feeOn-time77%
Search Air France flights
FinnairCheapest£470Average£642FlexibilityNo cancel feeOn-time76%
Search Finnair flights
KLMCheapest£478Average£717FlexibilityNo cancel feeOn-time75%
Search KLM flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from London to Washington, D.C.?

When you search for this flight from London to Washington, D.C., Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

Why should you use Cheapflights to find cheap flight tickets from London to Washington, D.C.?

Cheapflights simply makes it quick and affordable to book flights from London to Washington, D.C. by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

Can Cheapflights find flights from London to Washington, D.C. with no change fees?

Need flexible booking options for your flight to Washington, D.C. from London? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

Can Cheapflights notify me if prices for flights from London to Washington, D.C. become cheaper?

Of course! You can now track prices for flights from London to Washington, D.C. and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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