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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 3/6. Fares are subject to change and may not be available on all flights or dates of travel.
LON — SEA
11 May — 18 May1
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 11 April 2026.

Thu 21/508:30
STN
-
SEA
2 stops35h 15m
Multiple Airlines
Thu 28/515:40
SEA
-
STN
2 stops23h 40m
Multiple Airlines
Deal found 6/4£475
Mon 2/1120:35
LHR
-
SEA
1 stop28h 25m
Icelandair
Mon 16/1114:35
SEA
-
LHR
1 stop20h 55m
Icelandair
Deal found 6/4£477
Thu 1/1015:40
LGW
-
SEA
1 stop13h 00m
Icelandair
Thu 15/1019:00
SEA
-
LGW
1 stop11h 40m
Icelandair
Deal found 6/4£477
Mon 2/1111:55
LGW
-
SEA
1 stop13h 05m
Icelandair
Mon 16/1114:35
SEA
-
LGW
1 stop12h 20m
Icelandair
Deal found 6/4£479
Mon 4/515:40
LGW
-
SEA
1 stop13h 00m
Icelandair
Fri 8/519:00
SEA
-
LGW
1 stop11h 40m
Icelandair
Deal found 6/4£480
Thu 1/1021:25
LHR
-
SEA
1 stop31h 15m
Icelandair
Thu 15/1015:40
SEA
-
LHR
1 stop12h 15m
Icelandair
Deal found 6/4£480
Thu 21/509:25
LTN
-
SEA
2 stops34h 20m
Multiple Airlines
Thu 28/515:40
SEA
-
LTN
2 stops23h 45m
Multiple Airlines
Deal found 6/4£480
Thu 8/1015:40
LGW
-
SEA
1 stop13h 00m
Icelandair
Thu 15/1019:00
SEA
-
LGW
1 stop11h 40m
Icelandair
Deal found 7/4£483
Thu 1/1021:25
LHR
-
SEA
1 stop31h 15m
Icelandair
Tue 6/1019:00
SEA
-
LHR
1 stop17h 20m
Icelandair
Deal found 6/4£483
Thu 8/1013:05
LHR
-
SEA
1 stop12h 50m
Icelandair
Thu 15/1015:40
SEA
-
LHR
1 stop12h 15m
Icelandair
Deal found 7/4£483
Wed 22/413:05
LHR
-
SEA
1 stop15h 35m
Icelandair
Sat 2/519:00
SEA
-
LHR
1 stop17h 20m
Icelandair
Deal found 6/4£485
Sat 16/521:25
LHR
-
SEA
1 stop31h 15m
Icelandair
Mon 3/823:25
SEA
-
LHR
1 stop28h 30m
Icelandair
Deal found 6/4£486

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 11 April 2026.

Round-trip from

£475

One-way from

£295

Popular in

July

Cheapest in

February

Average price

£538

Good round-trip deal

£651 or less

Good one-way deal

£533 or less
21/5-28/5
  • 21/5-28/5
  • 4 total stops
  • 58h 55m total
  • London to Washington
Search Deals
3/6
  • 3/6
  • 3 total stops
  • 43h 12m total
  • London to Washington
Search Deals
Highest demand for flights based on searches. 11% potential increase in price (£53 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 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 11 April 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

LHR - SEA

LHRSEA

London Heathrow

Mon 5/10

21:25-20:40

1 stop31h 15m

Seattle/Tacoma Intl

Sat 17/10

15:40-11:55

1 stop12h 15m

£512

LondonSeattle

LTN - SEA

LTNSEA

London Luton

Tue 26/5

09:40-17:10

1 stop15h 30m

Seattle/Tacoma Intl

Tue 2/6

19:10-22:10

1 stop19h 00m

£518

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Mon 11/5

15:40-20:40

1 stop13h 00m

Seattle/Tacoma Intl

Thu 4/6

19:00-14:40

1 stop11h 40m

£536

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Sun 10/5

15:40-17:55

1 stop34h 15m

Seattle/Tacoma Intl

Wed 3/6

23:25-14:40

1 stop31h 15m

£540

LondonSeattle

LTN - SEA

LTNSEA

London Luton

Fri 12/6

06:20-17:10

1 stop18h 50m

Seattle/Tacoma Intl

Fri 19/6

19:10-17:25

1 stop14h 15m

£547

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Wed 1/7

12:50-22:58

1 stop18h 08m

Seattle/Tacoma Intl

Wed 8/7

07:15-06:20

1 stop15h 05m

£566

LondonSeattle

LTN - SEA

LTNSEA

London Luton

Fri 22/5

06:20-17:10

1 stop18h 50m

Seattle/Tacoma Intl

Fri 29/5

19:10-17:25

1 stop14h 15m

£586

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Mon 18/5

14:25-22:58

1 stop16h 33m

Seattle/Tacoma Intl

Mon 1/6

20:20-13:45

Nonstop9h 25m

£594

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Thu 18/6

06:30-11:37

1 stop13h 07m

Seattle/Tacoma Intl

Fri 26/6

18:20-12:10

Nonstop9h 50m

£602

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Sat 9/5

08:40-11:42

1 stop35h 02m

Seattle/Tacoma Intl

Wed 3/6

22:35-20:10

1 stop13h 35m

£606

Flights are sorted by cheapest return flights first.

Deals found on 6/4

Showing 1-10 of 60 resultsSorted by cheapest first
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2
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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, January is the cheapest month in which you can book a flight from London to State of Washington (average of £348). Flying from London to State of Washington in July is currently the most expensive (average of £511). 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 11 April 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 11 April 2026.

The most flights from LON to USWA are scheduled on a Monday (21 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (15 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 11 April 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
1,493 reviews
Check prices

Comfort

7.6

Food

7.3

Overall

7.7

Entertainment

7.1

Boarding

7.8

Crew

8.4

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas
KLM
7.7
Good
1,493 reviews
KLM
7.7
Good
1,493 reviews
Check prices

Comfort

7.6

Food

7.3

Overall

7.7

Entertainment

7.1

Boarding

7.8

Crew

8.4

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas
Virgin Atlantic
7.5
Good
685 reviews
KLM
7.7
Good
1,493 reviews
Check prices

Comfort

7.6

Food

7.3

Overall

7.7

Entertainment

7.1

Boarding

7.8

Crew

8.4

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas
Air France
7.4
Good
1,564 reviews
KLM
7.7
Good
1,493 reviews
Check prices

Comfort

7.6

Food

7.3

Overall

7.7

Entertainment

7.1

Boarding

7.8

Crew

8.4

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas
Icelandair
7.0
Good
632 reviews
KLM
7.7
Good
1,493 reviews
Check prices

Comfort

7.6

Food

7.3

Overall

7.7

Entertainment

7.1

Boarding

7.8

Crew

8.4

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas
British Airways
6.7
Okay
7,871 reviews
KLM
7.7
Good
1,493 reviews
Check prices

Comfort

7.6

Food

7.3

Overall

7.7

Entertainment

7.1

Boarding

7.8

Crew

8.4

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas

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 16h 33m. Fly via Icelandair, Delta, or British Airways 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 £352. British Airways flights start at £370 while deals on Aer Lingus start at £386 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: KLM (96%), Delta (94%), Virgin Atlantic (94%).

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

    On average you can expect to pay £1,767 for a flight from London to State of Washington. The cheapest flight overall is £413 while the most popular route, (London Heathrow - Seattle/Tacoma Intl) is currently priced at £469.

  • 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, January is the cheapest month in which you can book a flight from London to State of Washington (average of £348). Flying from London to State of Washington in July is currently the most expensive (average of £511). 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 11 April 2026.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest£334Average£541FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
IcelandairCheapest£340Average£473FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Aer LingusCheapest£417Average£670FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
Virgin AtlanticCheapest£426Average£615FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
United AirlinesCheapest£430Average£610FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
KLMCheapest£441Average£634FlexibilityNo cancel feeOn-time75%
Search KLM flights
British AirwaysCheapest£447Average£626FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Air FranceCheapest£449Average£643FlexibilityNo cancel feeOn-time77%
Search Air France flights
FinnairCheapest£460Average£669FlexibilityNo cancel feeOn-time76%
Search Finnair flights
Air CanadaCheapest£463Average£497FlexibilityNo cancel feeOn-time67%
Search Air Canada 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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