Find flights
Deals
When to book
Airlines
FAQs

Cheap flights from London to Washington, D.C. from £242

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 5/5. Fares are subject to change and may not be available on all flights or dates of travel.
LON — WAS
4 May — 11 May1
1 adult

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 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 29 April 2025.

Round-trip from

£406

One-way from

£242

Popular in

July

Cheapest in

February

Average price

£531

Good round-trip deal

£524 or less

Good one-way deal

£586 or less
Icelandair
  • Icelandair
  • 5/5-12/5
  • 2 total stops
  • 45h 50m total
  • London to Washington, D.C.
Search Deals
5/5
  • 5/5
  • 1 total stop
  • 27h 20m total
  • London to Washington, D.C.
Search Deals
Highest demand for flights based on searches. 11% potential increase in price (£55 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (£8 potential savings vs. average return 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 29 April 2025.

Tue 28/1010:55STN - BWI
1 stop11h 00mPLAY
Tue 18/1118:05BWI - STN
1 stop10h 50mPLAY
Deal found 28/4£406
Mon 5/521:25LHR - BWI
1 stop27h 00mIcelandair
Mon 12/520:30BWI - LHR
1 stop10h 25mIcelandair
Deal found 29/4£409
Sun 4/512:10LGW - BWI
2 stops34h 30mMultiple Airlines
Tue 13/518:50BWI - LGW
2 stops15h 20mMultiple Airlines
Deal found 28/4£413
Mon 5/506:25STN - BWI
2 stops16h 15mMultiple Airlines
Tue 13/518:50BWI - STN
2 stops23h 05mMultiple Airlines
Deal found 28/4£415
Tue 29/415:40LGW - BWI
1 stop32h 45mIcelandair
Mon 5/520:30BWI - LGW
1 stop13h 05mIcelandair
Deal found 28/4£426
Sat 14/610:00LGW - IAD
1 stop13h 30mMultiple Airlines
Sun 17/822:20IAD - LGW
1 stop11h 50mMultiple Airlines
Deal found 28/4£470
Fri 9/513:05LHR - IAD
1 stop11h 15mIcelandair
Mon 12/520:30IAD - LHR
1 stop10h 25mIcelandair
Deal found 28/4£472
Thu 6/1108:25LHR - DCA
1 stop12h 35mJetBlue
Mon 10/1115:10DCA - LHR
1 stop9h 45mJetBlue
Deal found 28/4£472
Fri 5/906:40LHR - IAD
1 stop18h 19mScandinavian Airlines
Thu 25/922:05IAD - LHR
1 stop12h 55mScandinavian Airlines
Deal found 28/4£473
Mon 5/509:00LTN - IAD
2 stops15h 20mMultiple Airlines
Sun 11/520:30IAD - LTN
2 stops14h 10mMultiple Airlines
Deal found 28/4£473
Sat 24/506:50LHR - IAD
1 stop11h 40mLufthansa
Sat 31/522:11IAD - LHR
1 stop32h 39mLufthansa
Deal found 28/4£476
Fri 5/912:10LGW - DCA
1 stop13h 41mJetBlue
Sat 27/918:55DCA - LGW
1 stop9h 40mJetBlue
Deal found 28/4£477

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 29 April 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

Thu 29/5

11:40-17:40

1 stop11h 00m

Baltimore/Washington

Tue 26/8

18:50-10:40

1 stop10h 50m

£423

LondonBaltimore

LHR - BWI

LHRBWI

London Heathrow

Fri 9/5

13:05-19:25

1 stop11h 20m

Baltimore/Washington

Sun 11/5

20:30-11:55

1 stop10h 25m

£434

LondonBaltimore

STN - BWI

STNBWI

London Stansted

Mon 12/5

11:00-19:25

2 stops13h 25m

Baltimore/Washington

Mon 19/5

20:30-22:10

2 stops20h 40m

£436

LondonBaltimore

LGW - BWI

LGWBWI

London Gatwick

Mon 12/5

08:40-19:25

2 stops15h 45m

Baltimore/Washington

Mon 19/5

20:30-18:35

2 stops17h 05m

£441

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Sat 14/6

10:00-18:30

1 stop13h 30m

Washington, D.C. Dulles Intl

Sun 17/8

22:20-15:10

1 stop11h 50m

£470

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Fri 9/5

13:05-19:20

1 stop11h 15m

Washington, D.C. Dulles Intl

Mon 12/5

20:30-11:55

1 stop10h 25m

£472

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Fri 5/9

06:40-19:59

1 stop18h 19m

Washington, D.C. Dulles Intl

Thu 25/9

22:05-16:00

1 stop12h 55m

£473

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Thu 22/5

07:30-15:15

1 stop12h 45m

Washington, D.C. Dulles Intl

Sat 31/5

22:11-09:35

1 stop30h 24m

£475

LondonWashington, D.C.

LGW - DCA

LGWDCA

London Gatwick

Fri 5/9

12:10-20:51

1 stop13h 41m

Washington, D.C. Reagan-National

Sat 27/9

18:55-09:35

1 stop9h 40m

£477

LondonWashington, D.C.

LHR - DCA

LHRDCA

London Heathrow

Fri 5/9

08:25-16:13

1 stop12h 48m

Washington, D.C. Reagan-National

Thu 25/9

06:30-20:45

1 stop9h 15m

£479

Flights are sorted by cheapest return flights first.

Deals found on 28/4

Showing 1-10 of 60 results
1
2
3
...
6

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 25 April 2025.

Booking 70 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 29 April 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.

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

Explore weekly flight availability from London to Washington, D.C.. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 29 April 2025.

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

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 29 April 2025.
Get a feel of what it's like to fly with Delta, KLM and Finnair 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
7,929 reviews
Check prices

Food

7.3

Entertainment

7.9

Crew

8.5

Overall

8.0

Boarding

8.2

Comfort

7.9

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
Check prices

Food

7.3

Entertainment

7.9

Crew

8.5

Overall

8.0

Boarding

8.2

Comfort

7.9

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
1,333 reviews
Delta
8.0
Very Good
7,929 reviews
Check prices

Food

7.3

Entertainment

7.9

Crew

8.5

Overall

8.0

Boarding

8.2

Comfort

7.9

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
1,273 reviews
Delta
8.0
Very Good
7,929 reviews
Check prices

Food

7.3

Entertainment

7.9

Crew

8.5

Overall

8.0

Boarding

8.2

Comfort

7.9

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
Check prices

Food

7.3

Entertainment

7.9

Crew

8.5

Overall

8.0

Boarding

8.2

Comfort

7.9

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
Check prices

Food

7.3

Entertainment

7.9

Crew

8.5

Overall

8.0

Boarding

8.2

Comfort

7.9

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, Icelandair (£406), PLAY (£412), and Scandinavian Airlines (£473) offers the cheapest pricing from London to Washington, D.C.. Users have found that Icelandair is 26% 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 £274. Users have also found prices from £333 and £350 on TAP AIR PORTUGAL and WestJet, 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 Heathrow - Washington, D.C. Reagan-National 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: United Airlines (92%), Air Canada (90%), Austrian Airlines (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 £1,227, our data shows the cheapest flight currently is £349. When looking at the most popular route, (London Heathrow - Washington, D.C. Dulles Intl), you can expect to pay £423 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 £40 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

Travelling to a place near London?

Book flights to London if you plan to visit one of these locations
Silver Spring
Arlington
Woodbridge
College Park
Laurel
Tysons

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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 29 April 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 29 April 2025.
AirlineCheapestAverageFlexibilityOn-time
PLAYCheapest£250Average£462FlexibilityNo cancel feeOn-timeN/A
Search PLAY flights
DeltaCheapest£320Average£765FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
TAP AIR PORTUGALCheapest£352Average£592FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
IcelandairCheapest£358Average£533FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
British AirwaysCheapest£369Average£625FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Brussels AirlinesCheapest£383Average£718FlexibilityNo cancel feeOn-timeN/A
Search Brussels Airlines flights
JetBlueCheapest£383Average£589FlexibilityNo cancel feeOn-time62%
Search JetBlue flights
Scandinavian AirlinesCheapest£440Average£584FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
Air FranceCheapest£442Average£612FlexibilityNo cancel feeOn-time77%
Search Air France flights
FinnairCheapest£451Average£637FlexibilityNo cancel feeOn-time76%
Search Finnair 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.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.
Site
©2025 Cheapflights