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Cheap flights from London to Washington from £269

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 21/1. Fares are subject to change and may not be available on all flights or dates of travel.
LON — SEA
9 Nov — 16 Nov1
1 adult
1 adult, Economy

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 10 October 2025.

Round-trip from

£447

One-way from

£269

Popular in

July

Cheapest in

January

Average price

£538

Good round-trip deal

£500 or less

Good one-way deal

£570 or less
Icelandair
  • Icelandair
  • 12/11-26/11
  • 2 total stops
  • 25h 25m total
  • London to Washington
Search Deals
21/1
  • 21/1
  • 2 total stops
  • 47h 10m total
  • London to Washington
Search Deals
Highest demand for flights based on searches. 12% potential increase in price (£59 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 October 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.
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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 10 October 2025.

Wed 12/1111:55LGW - SEA
1 stop13h 05mIcelandair
Wed 26/1114:35SEA - LGW
1 stop12h 20mIcelandair
Deal found 9/10£447
Thu 6/1105:55STN - SEA
2 stops19h 05mMultiple Airlines
Thu 13/1114:35SEA - STN
2 stops16h 40mMultiple Airlines
Deal found 9/10£448
Mon 10/1111:55LGW - SEA
1 stop13h 05mIcelandair
Wed 19/1114:35SEA - LGW
1 stop12h 20mIcelandair
Deal found 10/10£448
Wed 12/1112:15LHR - SEA
1 stop12h 45mIcelandair
Wed 26/1114:35SEA - LHR
1 stop20h 55mIcelandair
Deal found 9/10£449
Mon 24/1107:40LGW - SEA
1 stop17h 20mMultiple Airlines
Mon 1/1214:35SEA - LGW
1 stop16h 55mMultiple Airlines
Deal found 9/10£450
Mon 24/1112:15LHR - SEA
1 stop12h 45mIcelandair
Mon 1/1214:35SEA - LHR
1 stop12h 15mIcelandair
Deal found 9/10£450
Mon 24/1111:55LGW - SEA
1 stop13h 05mIcelandair
Mon 1/1214:35SEA - LGW
1 stop12h 20mIcelandair
Deal found 10/10£451
Mon 3/1111:55LGW - SEA
1 stop13h 05mIcelandair
Thu 6/1114:35SEA - LGW
1 stop12h 20mIcelandair
Deal found 9/10£453
Mon 10/1120:35LHR - SEA
1 stop28h 25mIcelandair
Wed 19/1114:35SEA - LHR
1 stop20h 55mIcelandair
Deal found 10/10£453
Tue 2/1211:55LGW - SEA
1 stop13h 05mIcelandair
Tue 9/1214:35SEA - LGW
1 stop12h 20mIcelandair
Deal found 8/10£454
Tue 4/1112:15LHR - SEA
1 stop12h 45mIcelandair
Wed 12/1114:35SEA - LHR
1 stop12h 15mIcelandair
Deal found 9/10£454
Mon 24/1106:40LHR - SEA
2 stops18h 20mMultiple Airlines
Mon 1/1214:35SEA - LHR
2 stops22h 45mMultiple Airlines
Deal found 10/10£455

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 10 October 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

STN - SEA

STNSEA

London Stansted

Thu 6/11

05:55-17:00

2 stops19h 05m

Seattle/Tacoma Intl

Thu 13/11

14:35-15:15

2 stops16h 40m

£448

LondonSeattle

LTN - SEA

LTNSEA

London Luton

Mon 24/11

08:00-17:00

1 stop17h 00m

Seattle/Tacoma Intl

Mon 1/12

14:35-14:00

1 stop15h 25m

£457

LondonSeattle

LTN - SEA

LTNSEA

London Luton

Wed 12/11

08:00-17:00

1 stop17h 00m

Seattle/Tacoma Intl

Wed 26/11

14:35-20:50

1 stop22h 15m

£457

LondonSeattle

STN - SEA

STNSEA

London Stansted

Sat 8/11

13:50-13:20

2 stops31h 30m

Seattle/Tacoma Intl

Sat 15/11

14:00-23:25

2 stops25h 25m

£458

LondonSeattle

LTN - SEA

LTNSEA

London Luton

Sun 23/11

06:00-17:00

1 stop19h 00m

Seattle/Tacoma Intl

Sun 30/11

14:35-14:50

1 stop16h 15m

£465

LondonSeattle

LTN - SEA

LTNSEA

London Luton

Thu 20/11

06:00-17:00

1 stop19h 00m

Seattle/Tacoma Intl

Mon 24/11

14:35-14:00

1 stop15h 25m

£489

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Mon 3/11

11:55-17:00

1 stop13h 05m

Seattle/Tacoma Intl

Mon 10/11

14:35-10:55

1 stop12h 20m

£496

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Tue 23/12

10:00-11:50

1 stop33h 50m

Seattle/Tacoma Intl

Tue 30/12

16:48-10:30

Nonstop9h 42m

£497

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Sun 9/11

20:05-20:51

2 stops32h 46m

Seattle/Tacoma Intl

Mon 24/11

13:20-17:50

2 stops20h 30m

£499

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Sun 9/11

11:55-17:00

1 stop13h 05m

Seattle/Tacoma Intl

Wed 12/11

14:35-10:55

1 stop12h 20m

£503

Flights are sorted by cheapest return flights first.

Deals found on 9/10

Showing 1-10 of 60 results
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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 £308). Flying from London to State of Washington in August is currently the most expensive (average of £463). 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 10 October 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 at midday, which can drop the price by up to 4% 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 10 October 2025.

The most flights from LON to USWA are scheduled on a Monday (21 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (10 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 10 October 2025.
Check out reviews from past customers who have flown with KLM, Air France, andVirgin Atlantic 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
1,401 reviews
Check prices

Comfort

7.6

Overall

7.7

Food

7.2

Crew

8.4

Entertainment

7.1

Boarding

7.8

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
1,401 reviews
KLM
7.7
Good
1,401 reviews
Check prices

Comfort

7.6

Overall

7.7

Food

7.2

Crew

8.4

Entertainment

7.1

Boarding

7.8

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
1,468 reviews
KLM
7.7
Good
1,401 reviews
Check prices

Comfort

7.6

Overall

7.7

Food

7.2

Crew

8.4

Entertainment

7.1

Boarding

7.8

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
7.4
Good
665 reviews
KLM
7.7
Good
1,401 reviews
Check prices

Comfort

7.6

Overall

7.7

Food

7.2

Crew

8.4

Entertainment

7.1

Boarding

7.8

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
7.0
Good
553 reviews
KLM
7.7
Good
1,401 reviews
Check prices

Comfort

7.6

Overall

7.7

Food

7.2

Crew

8.4

Entertainment

7.1

Boarding

7.8

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
7,449 reviews
KLM
7.7
Good
1,401 reviews
Check prices

Comfort

7.6

Overall

7.7

Food

7.2

Crew

8.4

Entertainment

7.1

Boarding

7.8

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 13h 05m. Fly via Icelandair, Delta, or SWISS to get the fastest option. The distance between London and State of Washington is about 4807 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 Icelandair, which is currently one of the cheapest options available, starting at £396. British Airways flights start at £417 while deals on Delta start at £420 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%), KLM (90%), Air France (90%).

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

    On average you can expect to pay £1,587 for a flight from London to State of Washington. The cheapest flight overall is £374 while the most popular route, (London Heathrow - Seattle/Tacoma Intl) is currently priced at £379.

  • 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 £308). Flying from London to State of Washington in August is currently the most expensive (average of £463). 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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Alternative routes for London to Washington

See prices for flight routes from nearby airports that may be better suited for you.
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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 10 October 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest£328Average£494FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Air FranceCheapest£388Average£586FlexibilityNo cancel feeOn-time77%
Search Air France flights
FinnairCheapest£401Average£574FlexibilityNo cancel feeOn-time76%
Search Finnair flights
LufthansaCheapest£402Average£565FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
KLMCheapest£408Average£607FlexibilityNo cancel feeOn-time75%
Search KLM flights
United AirlinesCheapest£409Average£621FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
British AirwaysCheapest£445Average£602FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Virgin AtlanticCheapest£446Average£676FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
DeltaCheapest£448Average£596FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Aer LingusCheapest£460Average£668FlexibilityNo 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.

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