Find flights
Deals
When to book
Airlines
FAQs

Cheap flights from London to Washington from £271

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 17/1. Fares are subject to change and may not be available on all flights or dates of travel.
LON — SEA
14 Dec — 21 Dec1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from London to Washington

Keep the following information in mind while searching for London to Washington flight deals. Data was last updated 14 November 2025.

Round-trip from

£473

One-way from

£271

Popular in

July

Cheapest in

January

Average price

£544

Good round-trip deal

£559 or less

Good one-way deal

£489 or less
British Airways
  • British Airways
  • 13/3-14/4
  • Nonstop
  • 19h 20m total
  • London to Washington
Search Deals
17/1
  • 17/1
  • 2 total stops
  • 29h 51m total
  • London to Washington
Search Deals
Highest demand for flights based on searches. 12% potential increase in price (£58 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£10 potential savings vs. average return price).
Search Deals
Average for round-trip flights in November 2025
Search Deals
Price to beat on a round-trip flight from London (LON) to Washington.
Search Deals
Price to beat on a one-way flight from London (LON) to Washington.
Search Deals

Find flight deals from London to Washington

Enter your travel dates to find the best prices.

Cheapest flights from London to Washington
Explore the most affordable flight options available from London to Washington. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 14 November 2025.

Wed 19/1111:55LGW - SEA
1 stop13h 05mIcelandair
Wed 31/1214:35SEA - LGW
1 stop12h 20mIcelandair
Deal found 13/11£474
Wed 24/1211:55LGW - SEA
1 stop13h 05mIcelandair
Tue 6/114:35SEA - LGW
1 stop12h 20mIcelandair
Deal found 13/11£476
Sat 6/1211:55LGW - SEA
1 stop13h 05mIcelandair
Tue 6/114:35SEA - LGW
1 stop12h 20mIcelandair
Deal found 12/11£477
Thu 4/1220:35LHR - SEA
1 stop28h 25mIcelandair
Tue 6/114:35SEA - LHR
1 stop20h 55mIcelandair
Deal found 12/11£480
Sat 6/1212:15LHR - SEA
1 stop12h 45mIcelandair
Tue 6/114:35SEA - LHR
1 stop20h 55mIcelandair
Deal found 12/11£480
Tue 16/1220:35LHR - SEA
1 stop28h 25mIcelandair
Thu 15/114:35SEA - LHR
1 stop12h 15mIcelandair
Deal found 13/11£482
Tue 16/1220:35LHR - SEA
1 stop28h 25mIcelandair
Mon 5/114:35SEA - LHR
1 stop12h 15mIcelandair
Deal found 13/11£486
Tue 2/1220:35LHR - SEA
1 stop28h 25mIcelandair
Sat 6/1214:35SEA - LHR
1 stop20h 55mIcelandair
Deal found 13/11£489
Mon 8/1208:30STN - SEA
1 stop17h 50mMultiple Airlines
Sun 14/1220:05SEA - STN
1 stop12h 30mMultiple Airlines
Deal found 12/11£490
Sun 23/1120:35LHR - SEA
1 stop28h 25mIcelandair
Sun 30/1114:35SEA - LHR
1 stop12h 15mIcelandair
Deal found 12/11£490
Mon 8/1209:40LGW - SEA
1 stop16h 40mMultiple Airlines
Sun 14/1220:05SEA - LGW
1 stop13h 05mMultiple Airlines
Deal found 12/11£494
Tue 18/1120:35LHR - SEA
1 stop28h 25mIcelandair
Wed 31/1214:35SEA - LHR
1 stop12h 15mIcelandair
Deal found 12/11£496

Cheapflights Fare Finder

 
Customise your flight search to find flights from London to Washington 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 14 November 2025.
Use the filters below to find and compare flights from London to Washington that are best for you.

Fly from

London

Fly to

Washington

Route

Depart

Return

Price

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Tue 16/12

20:35-17:00

1 stop28h 25m

Seattle/Tacoma Intl

Thu 15/1

14:35-10:50

1 stop12h 15m

£482

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Tue 16/12

20:35-17:00

1 stop28h 25m

Seattle/Tacoma Intl

Wed 14/1

14:35-19:30

1 stop20h 55m

£483

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Fri 13/2

14:55-16:55

Nonstop10h 00m

Seattle/Tacoma Intl

Thu 19/2

13:39-11:35

1 stop13h 56m

£495

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Wed 21/1

12:20-14:53

Nonstop10h 33m

Seattle/Tacoma Intl

Sat 24/1

22:59-06:25

1 stop23h 26m

£499

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Thu 27/11

12:15-17:00

1 stop12h 45m

Seattle/Tacoma Intl

Mon 1/12

14:35-10:50

1 stop12h 15m

£504

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Tue 13/1

13:00-10:26

1 stop29h 26m

Seattle/Tacoma Intl

Thu 29/1

23:10-10:00

1 stop26h 50m

£511

LondonSeattle

LCY - SEA

LCYSEA

London City

Mon 2/2

08:40-20:46

2 stops20h 06m

Seattle/Tacoma Intl

Tue 10/2

07:10-08:10

2 stops17h 00m

£518

LondonSeattle

LCY - SEA

LCYSEA

London City

Thu 15/1

20:05-11:50

1 stop23h 45m

Seattle/Tacoma Intl

Thu 22/1

15:10-16:35

1 stop17h 25m

£519

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Tue 5/5

13:00-17:50

1 stop12h 50m

Seattle/Tacoma Intl

Sat 9/5

19:00-14:40

1 stop11h 40m

£524

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Mon 2/2

06:30-12:10

1 stop13h 40m

Seattle/Tacoma Intl

Tue 10/2

10:58-11:15

1 stop16h 17m

£526

Flights are sorted by cheapest return flights first.

Deals found on 11/11

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

Best time to book a flight from London to Washington

Have a flexible travel schedule? Discover the best time to fly to Washington 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

What is the cheapest month to book a flight from London to State of Washington?

Currently, March is the cheapest month in which you can book a flight from London to State of Washington (average of £310). Flying from London to State of Washington in December is currently the most expensive (average of £473). 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 WA?

Find hourly flight availability from London to Washington. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 14 November 2025.

When flying from London to State of Washington, 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 1% versus a flight in the afternoon.

What is the cheapest day to fly from London to State of Washington?

Use this chart to determine the cheapest time to fly return from London to Washington. Price data was last updated on 16 December 2024.

Travellers seeking maximum savings on their London to State of Washington flight should consider departing on Wednesday mornings when fares are most often at their lowest. Friday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from London to State of Washington

Explore weekly flight availability from London to Washington. 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 14 November 2025.

The most flights from LON to USWA are scheduled on a Friday (17 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (6 on average).

How much does it cost for a return flight from London to State of Washington?

Reviews of airlines servicing Washington

Get insights into the airlines that provide service to Washington. 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. Reviews last updated 14 November 2025.
Check out reviews from past customers who have flown with KLM, Virgin Atlantic, andAir France from London to Washington to help guide your decision. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
KLM
7.7
Good
1,411 reviews
Check prices

Comfort

7.7

Crew

8.4

Food

7.3

Boarding

7.8

Entertainment

7.1

Overall

7.7

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.
KLM
7.7
Good
1,411 reviews
KLM
7.7
Good
1,411 reviews
Check prices

Comfort

7.7

Crew

8.4

Food

7.3

Boarding

7.8

Entertainment

7.1

Overall

7.7

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.
Virgin Atlantic
7.5
Good
673 reviews
KLM
7.7
Good
1,411 reviews
Check prices

Comfort

7.7

Crew

8.4

Food

7.3

Boarding

7.8

Entertainment

7.1

Overall

7.7

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.
Air France
7.4
Good
1,487 reviews
KLM
7.7
Good
1,411 reviews
Check prices

Comfort

7.7

Crew

8.4

Food

7.3

Boarding

7.8

Entertainment

7.1

Overall

7.7

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.
Icelandair
7.1
Good
578 reviews
KLM
7.7
Good
1,411 reviews
Check prices

Comfort

7.7

Crew

8.4

Food

7.3

Boarding

7.8

Entertainment

7.1

Overall

7.7

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.
British Airways
6.7
Okay
7,521 reviews
KLM
7.7
Good
1,411 reviews
Check prices

Comfort

7.7

Crew

8.4

Food

7.3

Boarding

7.8

Entertainment

7.1

Overall

7.7

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.

Related info for your journey

Find useful and relevant information for your journey from London to Washington. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from London to State of Washington?

    There are many flights that can get you from London to State of Washington in 10h. Fly via Icelandair, British Airways, or Delta to get the fastest option. The distance between London and State of Washington is about 4783 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines to fly from London to State of Washington one-way?

    To fly one-way, consider booking your trip with British Airways, which is currently one of the cheapest options available, starting at £397. Virgin Atlantic flights start at £405 while deals on Lufthansa start at £410 one-way.

  • What are the most popular routes from London to State of Washington?

    While some choose either London Gatwick - Seattle/Tacoma Intl or London City - Seattle/Tacoma Intl, London Heathrow - Seattle/Tacoma Intl is the most popular route from London to State of Washington.

  • What are the most reliable airlines from London to State of Washington?

    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 State of Washington on time: Scandinavian Airlines (97%), Air France (89%), KLM (88%).

  • What are the cheapest flights from London to State of Washington?

    On average you can expect to pay £1,555 for a flight from London to State of Washington. The cheapest flight overall is £422 while the most popular route, (London Heathrow - Seattle/Tacoma Intl) is currently priced at £374.

  • Can I find deals for flights from London to Washington that include hotel bookings?

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

  • How can I find direct flights from London to Washington?

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

  • Can I find deals for business class flights from London to Washington?

    Yes. Cheapflights offers flight deals from London to Washington 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 State of Washington?

    Currently, March is the cheapest month in which you can book a flight from London to State of Washington (average of £310). Flying from London to State of Washington in December is currently the most expensive (average of £473). 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

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.

Alternative routes for London to Washington

See prices for flight routes from nearby airports that may be better suited for you.
Heathrow to John F Kennedy Intl flights
Heathrow to Newark flights
Heathrow to LaGuardia flights
London City to John F Kennedy Intl flights
Gatwick to Newark flights
Gatwick to John F Kennedy Intl flights
Stansted to John F Kennedy Intl flights
Heathrow to Miami flights
Gatwick to LaGuardia flights
London City to Newark flights
Luton to John F Kennedy Intl flights
Stansted to Newark flights
Heathrow to Los Angeles flights
Luton to Newark flights
Heathrow to Orlando flights
Manchester to John F Kennedy Intl flights
Heathrow to Boston flights
Heathrow to San Francisco flights
Heathrow to Dulles Intl flights
Heathrow to Las Vegas flights
London City to LaGuardia flights
Heathrow to Dallas/Fort Worth flights
Gatwick to Miami flights
London City to Miami flights
Manchester to Orlando flights
Heathrow to O'Hare Intl flights
Heathrow to Baltimore flights
Heathrow to Tampa flights
Heathrow to Hobby flights
Gatwick to Orlando flights
Gatwick to Los Angeles flights
Heathrow to Atlanta flights
Heathrow to Seattle flights
London City to Los Angeles flights
Stansted to Miami flights
Manchester to Newark flights
Heathrow to George Bush Intcntl flights
Gatwick to Boston flights
London City to Orlando flights
Manchester to LaGuardia flights
Heathrow to Philadelphia flights
Luton to Miami flights
London City to Boston flights
Gatwick to Las Vegas flights
Edinburgh to Newark flights
Gatwick to San Francisco flights
Gatwick to Dulles Intl flights
Heathrow to Santa Ana flights
Stansted to Los Angeles flights
Heathrow to Ontario flights

Top 10 airlines flying from London to Washington

Discover the top 10 airlines that operate flights from London to Washington. 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 14 November 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest£350Average£499FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Air FranceCheapest£393Average£611FlexibilityNo cancel feeOn-time77%
Search Air France flights
FinnairCheapest£406Average£576FlexibilityNo cancel feeOn-time76%
Search Finnair flights
LufthansaCheapest£407Average£571FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
KLMCheapest£411Average£614FlexibilityNo cancel feeOn-time75%
Search KLM flights
United AirlinesCheapest£414Average£629FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
British AirwaysCheapest£449Average£615FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Virgin AtlanticCheapest£451Average£675FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
DeltaCheapest£454Average£608FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Aer LingusCheapest£466Average£678FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus 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?

Deals for London to Washington flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

Why should you use Cheapflights to find cheap flight tickets from London to Washington?

Cheapflights simply makes it quick and affordable to book flights from London to Washington 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 with no change fees?

Yes, we can. To see specific flights from London to Washington with no change fees, users can toggle flexible booking options after using the search form above to find flights.

Can Cheapflights notify me if prices for flights from London to Washington become cheaper?

Yes! Start tracking prices for London to Washington flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your 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.