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Cheap flights from London to Washington from £305

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 7/6. Fares are subject to change and may not be available on all flights or dates of travel.
LON — SEA
23 Jun — 30 Jun1
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 24 May 2026.

Thu 4/611:05
LGW
-
SEA
1 stop14h 05m
Multiple Airlines
Sun 7/619:10
SEA
-
LGW
1 stop17h 45m
Multiple Airlines
Deal found 19/5£530
Thu 25/609:45
LGW
-
SEA
1 stop15h 25m
Multiple Airlines
Mon 29/619:10
SEA
-
LGW
1 stop13h 45m
Multiple Airlines
Deal found 20/5£532
Sun 21/613:00
LGW
-
SEA
1 stop30h 45m
Icelandair
Sun 5/715:40
SEA
-
LGW
1 stop15h 00m
Icelandair
Deal found 20/5£533
Wed 2/909:00
LHR
-
SEA
1 stop15h 59m
Multiple Airlines
Tue 8/908:10
SEA
-
LHR
1 stop14h 45m
Multiple Airlines
Deal found 19/5£533
Wed 18/1110:00
LGW
-
SEA
1 stop13h 21m
Delta
Mon 23/1114:05
SEA
-
LGW
1 stop17h 40m
Delta
Deal found 23/5£534
Fri 13/1112:20
LHR
-
SEA
Nonstop10h 25m
Virgin Atlantic
Thu 19/1106:05
SEA
-
LHR
1 stop17h 00m
Virgin Atlantic
Deal found 20/5£534
Mon 8/608:15
LTN
-
SEA
1 stop16h 55m
Multiple Airlines
Sun 21/619:10
SEA
-
LTN
1 stop12h 15m
Multiple Airlines
Deal found 19/5£534
Wed 17/609:45
LGW
-
SEA
1 stop15h 25m
Multiple Airlines
Wed 24/619:10
SEA
-
LGW
1 stop14h 40m
Multiple Airlines
Deal found 20/5£535
Sat 26/921:25
LHR
-
SEA
1 stop31h 15m
Icelandair
Thu 22/1019:00
SEA
-
LHR
1 stop17h 20m
Icelandair
Deal found 21/5£535
Thu 22/1015:40
LGW
-
SEA
1 stop13h 00m
Icelandair
Sat 31/1015:35
SEA
-
LGW
1 stop12h 20m
Icelandair
Deal found 21/5£537
Tue 1/913:05
LHR
-
SEA
1 stop15h 35m
Icelandair
Thu 17/919:00
SEA
-
LHR
1 stop17h 20m
Icelandair
Deal found 19/5£537
Thu 1/1006:15
LHR
-
SEA
1 stop13h 00m
Multiple Airlines
Mon 30/1113:30
SEA
-
LHR
1 stop12h 30m
Multiple Airlines
Deal found 22/5£539

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 24 May 2026.

Round-trip from

£530

One-way from

£305

Popular in

July

Cheapest in

February

Average price

£555

Good round-trip deal

£563 or less

Good one-way deal

£551 or less
4/6-7/6
  • 4/6-7/6
  • 2 total stops
  • 31h 50m total
  • London to Washington
Search Deals
7/6
  • 7/6
  • 3 total stops
  • 39h 15m total
  • London to Washington
Search Deals
Highest demand for flights based on searches. 10% potential increase in price (£50 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 May 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 24 May 2026.
Use the filters below to find and compare flights from London to Washington that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonSeattle

LTN - SEA

LTNSEA

London Luton

Wed 17/6

06:15-17:10

1 stop18h 55m

Seattle/Tacoma Intl

Wed 24/6

19:10-15:25

1 stop12h 15m

£546

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Mon 12/10

09:55-16:39

1 stop14h 44m

Seattle/Tacoma Intl

Tue 1/12

16:48-10:30

Nonstop9h 42m

£557

LondonSeattle

LTN - SEA

LTNSEA

London Luton

Wed 19/8

18:10-09:40

3 stops47h 30m

Seattle/Tacoma Intl

Wed 16/9

15:40-21:30

3 stops21h 50m

£562

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Mon 12/10

17:00-10:35

2 stops25h 35m

Seattle/Tacoma Intl

Tue 1/12

13:40-15:45

1 stop18h 05m

£578

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Tue 21/7

17:45-20:03

Nonstop10h 18m

Seattle/Tacoma Intl

Mon 7/12

07:20-06:50

1 stop15h 30m

£604

LondonSeattle

LCY - SEA

LCYSEA

London City

Thu 15/10

09:20-22:12

2 stops20h 52m

Seattle/Tacoma Intl

Sun 1/11

06:00-07:15

2 stops17h 15m

£616

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Wed 2/9

09:00-16:59

1 stop15h 59m

Seattle/Tacoma Intl

Wed 9/9

07:00-07:15

2 stops16h 15m

£624

LondonSeattle

LTN - SEA

LTNSEA

London Luton

Tue 1/9

09:40-09:40

2 stops32h 00m

Seattle/Tacoma Intl

Sun 25/10

15:35-23:55

3 stops25h 20m

£625

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Fri 16/10

10:25-17:47

1 stop15h 22m

Seattle/Tacoma Intl

Mon 2/11

14:05-15:45

1 stop17h 40m

£630

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Thu 25/6

09:55-16:24

1 stop14h 29m

Seattle/Tacoma Intl

Thu 2/7

07:15-06:45

1 stop15h 30m

£641

Flights are sorted by cheapest return flights first.

Deals found on 21/5

Showing 1-10 of 60 resultsSorted by cheapest first
1
2
3
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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, February is the cheapest month in which you can book a flight from London to State of Washington (average of £290). Flying from London to State of Washington in December is currently the most expensive (average of £1,162). 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 24 May 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 24 May 2026.

The most flights from LON to USWA are scheduled on a Tuesday (22 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (18 on average).

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

How far ahead should I book a flight from London to State of Washington?

The best time to book flights from London to State of Washington is 80 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

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 24 May 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
7.8
Good
1,521 reviews
Check prices

Entertainment

7.2

Overall

7.8

Boarding

7.8

Comfort

7.7

Food

7.3

Crew

8.4

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful
KLM
7.8
Good
1,521 reviews
KLM
7.8
Good
1,521 reviews
Check prices

Entertainment

7.2

Overall

7.8

Boarding

7.8

Comfort

7.7

Food

7.3

Crew

8.4

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful
Virgin Atlantic
7.5
Good
689 reviews
KLM
7.8
Good
1,521 reviews
Check prices

Entertainment

7.2

Overall

7.8

Boarding

7.8

Comfort

7.7

Food

7.3

Crew

8.4

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful
Air France
7.4
Good
1,591 reviews
KLM
7.8
Good
1,521 reviews
Check prices

Entertainment

7.2

Overall

7.8

Boarding

7.8

Comfort

7.7

Food

7.3

Crew

8.4

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful
Icelandair
7.0
Good
657 reviews
KLM
7.8
Good
1,521 reviews
Check prices

Entertainment

7.2

Overall

7.8

Boarding

7.8

Comfort

7.7

Food

7.3

Crew

8.4

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful
British Airways
6.7
Okay
7,998 reviews
KLM
7.8
Good
1,521 reviews
Check prices

Entertainment

7.2

Overall

7.8

Boarding

7.8

Comfort

7.7

Food

7.3

Crew

8.4

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful

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 18m. Fly via KLM, Virgin Atlantic, 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 Icelandair, which is currently one of the cheapest options available, starting at £353. British Airways flights start at £370 while deals on KLM start at £388 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 Stansted - 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: Delta (90%), Virgin Atlantic (90%), KLM (90%).

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

    On average you can expect to pay £1,738 for a flight from London to State of Washington. The cheapest flight overall is £446 while the most popular route, (London Heathrow - Seattle/Tacoma Intl) is currently priced at £440.

  • 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, February is the cheapest month in which you can book a flight from London to State of Washington (average of £290). Flying from London to State of Washington in December is currently the most expensive (average of £1,162). 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 24 May 2026.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest£334Average£544FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
IcelandairCheapest£341Average£486FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Aer LingusCheapest£417Average£671FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
Virgin AtlanticCheapest£426Average£641FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
KLMCheapest£436Average£710FlexibilityNo cancel feeOn-time75%
Search KLM flights
Air FranceCheapest£450Average£636FlexibilityNo cancel feeOn-time77%
Search Air France flights
British AirwaysCheapest£456Average£630FlexibilityNo cancel feeOn-time70%
Search British Airways flights
FinnairCheapest£460Average£670FlexibilityNo cancel feeOn-time76%
Search Finnair flights
Air CanadaCheapest£463Average£497FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapest£466Average£630FlexibilityNo cancel feeOn-time69%
Search United Airlines 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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