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Cheap flights from London to Washington from £295

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 31/3. Fares are subject to change and may not be available on all flights or dates of travel.
LON — SEA
3 Feb — 10 Feb1
1 adult
1 adult, Economy, 0 bags

Cheap 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 4 January 2026.

Mon 12/112:05LHR - SEA
2 stops35h 56mUnited Airlines
Mon 26/108:10SEA - LHR
2 stops39h 20mUnited Airlines
Deal found 3/1£398
Wed 22/417:50LHR - SEA
2 stops36h 01mAir Canada
Mon 27/405:50SEA - LHR
1 stop23h 30mAir Canada
Deal found 2/1£399
Tue 17/211:55LGW - SEA
1 stop13h 05mIcelandair
Tue 24/214:35SEA - LGW
1 stop12h 20mIcelandair
Deal found 2/1£400
Sun 8/311:45LHR - SEA
1 stop31h 50mScandinavian Airlines
Tue 31/320:25SEA - LHR
Nonstop9h 50mScandinavian Airlines
Deal found 2/1£400
Wed 11/209:20LCY - SEA
2 stops19h 52mSWISS
Sun 15/212:32SEA - LCY
2 stops20h 38mSWISS
Deal found 1/1£400
Sat 31/115:05LHR - SEA
Nonstop10h 05mVirgin Atlantic
Mon 2/316:45SEA - LHR
Nonstop9h 45mVirgin Atlantic
Deal found 1/1£400
Mon 7/909:15LGW - SEA
1 stop13h 15mSWISS
Mon 21/913:45SEA - LGW
2 stops20h 05mSWISS
Deal found 2/1£401
Fri 9/118:00LHR - SEA
1 stop36h 16mAir Canada
Sun 11/105:50SEA - LHR
1 stop22h 00mAir Canada
Deal found 2/1£401
Mon 23/309:30LHR - SEA
1 stop34h 40mUnited Airlines
Tue 14/414:10SEA - LHR
1 stop14h 30mUnited Airlines
Deal found 3/1£402
Tue 14/407:30LHR - SEA
2 stops19h 48mMultiple Airlines
Wed 29/410:10SEA - LHR
2 stops15h 50mMultiple Airlines
Deal found 3/1£403
Tue 17/308:20LHR - SEA
2 stops19h 46mAmerican Airlines
Tue 14/414:05SEA - LHR
1 stop14h 05mAmerican Airlines
Deal found 3/1£403
Thu 23/409:15LCY - SEA
2 stops19h 38mLufthansa
Mon 27/414:10SEA - LCY
1 stop19h 45mLufthansa
Deal found 2/1£404

Find flight deals from London to Washington

Keep the following information in mind while searching for London to Washington flight deals. Data was last updated 4 January 2026.

Round-trip from

£398

One-way from

£295

Popular in

July

Cheapest in

February

Average price

£482

Good round-trip deal

£484 or less

Good one-way deal

£458 or less
KLM
  • KLM
  • 16/2-23/2
  • Nonstop
  • 20h 00m total
  • London to Washington
Search Deals
31/3
  • 31/3
  • 3 total stops
  • 55h 39m total
  • London to Washington
Search Deals
Highest demand for flights based on searches. 13% potential increase in price (£60 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£9 potential savings vs. average return price).
Search Deals
Average for round-trip flights in January 2026
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

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 4 January 2026.
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

Wed 11/2

12:20-14:45

Nonstop10h 25m

Seattle/Tacoma Intl

Mon 16/2

16:55-10:30

Nonstop9h 35m

£398

LondonSeattle

LCY - SEA

LCYSEA

London City

Mon 16/2

09:15-21:01

2 stops19h 46m

Seattle/Tacoma Intl

Mon 23/2

12:32-17:05

2 stops20h 33m

£411

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Sun 14/6

07:25-16:59

1 stop17h 34m

Seattle/Tacoma Intl

Tue 8/9

08:35-14:10

1 stop21h 35m

£414

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Sat 28/2

07:40-18:03

2 stops18h 23m

Seattle/Tacoma Intl

Sun 15/3

07:00-08:45

2 stops18h 45m

£414

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Sat 14/2

06:30-11:40

1 stop13h 10m

Seattle/Tacoma Intl

Wed 18/2

16:55-10:30

Nonstop9h 35m

£416

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Wed 1/7

07:25-16:59

1 stop17h 34m

Seattle/Tacoma Intl

Wed 22/7

06:57-07:25

1 stop16h 28m

£419

LondonSeattle

LCY - SEA

LCYSEA

London City

Tue 17/2

17:05-11:40

1 stop26h 35m

Seattle/Tacoma Intl

Tue 24/2

06:00-08:10

2 stops18h 10m

£420

LondonSeattle

LCY - SEA

LCYSEA

London City

Mon 16/2

17:50-11:40

1 stop25h 50m

Seattle/Tacoma Intl

Mon 23/2

06:10-08:50

2 stops18h 40m

£420

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Tue 16/6

13:05-23:21

2 stops18h 16m

Seattle/Tacoma Intl

Sun 6/9

06:30-10:10

1 stop19h 40m

£421

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Wed 18/3

11:55-18:00

1 stop13h 05m

Seattle/Tacoma Intl

Tue 14/4

19:00-14:40

1 stop11h 40m

£422

Flights are sorted by cheapest return flights first.

Deals found on 3/1

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 £303). Flying from London to State of Washington in August is currently the most expensive (average of £458). 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 4 January 2026.

When flying from London to State of Washington, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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 4 January 2026.

The most flights from LON to USWA are scheduled on a Saturday (21 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (11 on average).

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 4 January 2026.
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
1,435 reviews
Check prices

Crew

8.4

Comfort

7.6

Overall

7.7

Food

7.2

Entertainment

7.1

Boarding

7.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle
KLM
7.7
Good
1,435 reviews
KLM
7.7
Good
1,435 reviews
Check prices

Crew

8.4

Comfort

7.6

Overall

7.7

Food

7.2

Entertainment

7.1

Boarding

7.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle
Virgin Atlantic
7.5
Good
678 reviews
KLM
7.7
Good
1,435 reviews
Check prices

Crew

8.4

Comfort

7.6

Overall

7.7

Food

7.2

Entertainment

7.1

Boarding

7.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle
Air France
7.4
Good
1,516 reviews
KLM
7.7
Good
1,435 reviews
Check prices

Crew

8.4

Comfort

7.6

Overall

7.7

Food

7.2

Entertainment

7.1

Boarding

7.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle
Icelandair
7.1
Good
593 reviews
KLM
7.7
Good
1,435 reviews
Check prices

Crew

8.4

Comfort

7.6

Overall

7.7

Food

7.2

Entertainment

7.1

Boarding

7.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle
British Airways
6.7
Okay
7,641 reviews
KLM
7.7
Good
1,435 reviews
Check prices

Crew

8.4

Comfort

7.6

Overall

7.7

Food

7.2

Entertainment

7.1

Boarding

7.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle

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 25m. Fly via KLM, SWISS, or United Airlines 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 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 (95%), KLM (95%), Air France (95%).

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

    On average you can expect to pay £1,660 for a flight from London to State of Washington. The cheapest flight overall is £383 while the most popular route, (London Heathrow - Seattle/Tacoma Intl) is currently priced at £316.

  • 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 £303). Flying from London to State of Washington in August is currently the most expensive (average of £458). 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 4 January 2026.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest£324Average£477FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Air FranceCheapest£386Average£612FlexibilityNo cancel feeOn-time77%
Search Air France flights
KLMCheapest£394Average£606FlexibilityNo cancel feeOn-time75%
Search KLM flights
LufthansaCheapest£394Average£544FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
United AirlinesCheapest£404Average£604FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
FinnairCheapest£410Average£579FlexibilityNo cancel feeOn-time76%
Search Finnair flights
Aer LingusCheapest£416Average£668FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
Virgin AtlanticCheapest£434Average£616FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
British AirwaysCheapest£437Average£597FlexibilityNo cancel feeOn-time70%
Search British Airways flights
DeltaCheapest£443Average£581FlexibilityNo cancel feeOn-timeN/A
Search Delta 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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