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Cheap flights from London to Washington from £315

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 23/9. Fares are subject to change and may not be available on all flights or dates of travel.
LON — SEA
10 Jul — 17 Jul1
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 10 June 2026.

Fri 25/915:40
LGW
-
SEA
1 stop13h 00m
Icelandair
Thu 11/314:35
SEA
-
LGW
1 stop12h 20m
Icelandair
Deal found 9/6£518
Sat 5/910:00
LCY
-
SEA
1 stop14h 35m
Virgin Atlantic
Sat 12/917:45
SEA
-
LCY
1 stop18h 30m
Virgin Atlantic
Deal found 9/6£518
Tue 22/917:45
LHR
-
SEA
Nonstop10h 25m
Delta
Thu 4/316:45
SEA
-
LHR
Nonstop9h 45m
Delta
Deal found 9/6£518
Mon 7/910:25
LGW
-
SEA
2 stops21h 32m
Virgin Atlantic
Wed 7/1018:45
SEA
-
LGW
1 stop13h 15m
Virgin Atlantic
Deal found 9/6£518
Mon 7/912:00
LHR
-
SEA
1 stop13h 10m
British Airways
Wed 16/913:30
SEA
-
LHR
Nonstop9h 15m
British Airways
Deal found 10/6£518
Thu 24/906:15
LHR
-
SEA
1 stop13h 00m
Air France
Tue 2/316:45
SEA
-
LHR
Nonstop9h 45m
Air France
Deal found 9/6£519
Wed 8/715:40
LGW
-
SEA
1 stop13h 00m
Icelandair
Wed 15/719:00
SEA
-
LGW
1 stop11h 40m
Icelandair
Deal found 9/6£520
Thu 18/617:45
LHR
-
SEA
Nonstop10h 16m
Delta
Mon 29/622:05
SEA
-
LHR
Nonstop9h 30m
Delta
Deal found 10/6£520
Tue 7/713:00
LGW
-
SEA
1 stop12h 55m
Icelandair
Tue 14/719:00
SEA
-
LGW
1 stop32h 45m
Icelandair
Deal found 9/6£521
Wed 22/717:45
LHR
-
SEA
Nonstop10h 18m
Air France
Sun 26/718:20
SEA
-
LHR
Nonstop9h 50m
Air France
Deal found 9/6£521
Mon 14/917:00
LGW
-
SEA
1 stop26h 15m
Virgin Atlantic
Tue 22/913:30
SEA
-
LGW
1 stop11h 55m
Virgin Atlantic
Deal found 9/6£521
Sun 23/811:40
LHR
-
SEA
Nonstop10h 20m
Delta
Sun 30/821:45
SEA
-
LHR
Nonstop9h 50m
Delta
Deal found 8/6£521

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 10 June 2026.

Round-trip from

£518

One-way from

£315

Popular in

July

Cheapest in

February

Average price

£625

Good round-trip deal

£597 or less

Good one-way deal

£604 or less
Icelandair
  • Icelandair
  • 25/9-9/3
  • 2 total stops
  • 25h 20m total
  • London to Washington
Search Deals
23/9
  • 23/9
  • 3 total stops
  • 48h 20m total
  • London to Washington
Search Deals
Highest demand for flights based on searches. 11% potential increase in price (£55 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (£7 potential savings vs. average return price).
Search Deals
Average for round-trip flights in June 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 10 June 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

LGW - SEA

LGWSEA

London Gatwick

Mon 7/9

10:25-23:57

2 stops21h 32m

Seattle/Tacoma Intl

Wed 7/10

18:45-16:00

1 stop13h 15m

£518

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Thu 24/9

17:45-20:10

Nonstop10h 25m

Seattle/Tacoma Intl

Sun 7/3

16:45-10:30

Nonstop9h 45m

£524

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Fri 17/7

10:35-21:59

2 stops19h 24m

Seattle/Tacoma Intl

Sun 26/7

05:15-07:25

1 stop18h 10m

£526

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Tue 4/8

17:45-20:03

Nonstop10h 18m

Seattle/Tacoma Intl

Wed 19/8

14:30-13:05

1 stop14h 35m

£527

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Sun 26/7

16:15-01:15

1 stop17h 00m

Seattle/Tacoma Intl

Fri 11/9

18:15-21:25

2 stops19h 10m

£527

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Sat 5/9

10:25-23:20

2 stops20h 55m

Seattle/Tacoma Intl

Sat 12/9

13:30-09:20

1 stop11h 50m

£531

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Sat 11/7

17:45-20:03

Nonstop10h 18m

Seattle/Tacoma Intl

Sat 18/7

21:50-15:35

Nonstop9h 45m

£538

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Fri 4/9

06:30-11:47

1 stop13h 17m

Seattle/Tacoma Intl

Mon 7/9

21:50-15:35

Nonstop9h 45m

£539

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Tue 29/9

06:00-18:52

2 stops20h 52m

Seattle/Tacoma Intl

Mon 5/10

07:00-07:55

2 stops16h 55m

£540

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Fri 7/8

07:45-19:36

1 stop19h 51m

Seattle/Tacoma Intl

Fri 21/8

05:00-06:45

2 stops17h 45m

£553

Flights are sorted by cheapest return flights first.

Deals found on 8/6

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 £291). Flying from London to State of Washington in November is currently the most expensive (average of £1,238). 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 June 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 10 June 2026.

The most flights from LON to USWA are scheduled on a Tuesday (22 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (16 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 10 June 2026.
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
7.8
Good
1,527 reviews
Check prices

Crew

8.4

Comfort

7.7

Boarding

7.8

Entertainment

7.2

Food

7.3

Overall

7.8

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
1,527 reviews
KLM
7.8
Good
1,527 reviews
Check prices

Crew

8.4

Comfort

7.7

Boarding

7.8

Entertainment

7.2

Food

7.3

Overall

7.8

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
7.5
Good
1,602 reviews
KLM
7.8
Good
1,527 reviews
Check prices

Crew

8.4

Comfort

7.7

Boarding

7.8

Entertainment

7.2

Food

7.3

Overall

7.8

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
1,527 reviews
Check prices

Crew

8.4

Comfort

7.7

Boarding

7.8

Entertainment

7.2

Food

7.3

Overall

7.8

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
672 reviews
KLM
7.8
Good
1,527 reviews
Check prices

Crew

8.4

Comfort

7.7

Boarding

7.8

Entertainment

7.2

Food

7.3

Overall

7.8

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
8,044 reviews
KLM
7.8
Good
1,527 reviews
Check prices

Crew

8.4

Comfort

7.7

Boarding

7.8

Entertainment

7.2

Food

7.3

Overall

7.8

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 25m. Fly via Virgin Atlantic, Delta, 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: KLM (88%), Air France (88%), Delta (88%).

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

    On average you can expect to pay £1,728 for a flight from London to State of Washington. The cheapest flight overall is £447 while the most popular route, (London Heathrow - Seattle/Tacoma Intl) is currently priced at £373.

  • 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 £291). Flying from London to State of Washington in November is currently the most expensive (average of £1,238). 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 June 2026.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest£335Average£504FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
IcelandairCheapest£342Average£513FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Aer LingusCheapest£419Average£698FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
Virgin AtlanticCheapest£427Average£641FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
KLMCheapest£438Average£763FlexibilityNo cancel feeOn-time75%
Search KLM flights
Air FranceCheapest£451Average£650FlexibilityNo cancel feeOn-time77%
Search Air France flights
DeltaCheapest£464Average£615FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
British AirwaysCheapest£465Average£639FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Air CanadaCheapest£465Average£499FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapest£468Average£615FlexibilityNo 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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