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Cheap flights from London to Washington from £307

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 30/5. Fares are subject to change and may not be available on all flights or dates of travel.
LON — SEA
4 Mar — 11 Mar1
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 2 February 2026.

Thu 3/921:25
LHR
-
SEA
1 stop22h 20m
Icelandair
Thu 17/919:00
SEA
-
LHR
1 stop17h 20m
Icelandair
Deal found 31/1£352
Mon 16/212:10
LHR
-
SEA
1 stop14h 10m
Aer Lingus
Mon 2/320:05
SEA
-
LHR
1 stop11h 30m
Aer Lingus
Deal found 31/1£360
Tue 9/612:25
LHR
-
SEA
1 stop15h 59m
Delta
Thu 10/921:50
SEA
-
LHR
Nonstop9h 45m
Delta
Deal found 31/1£361
Tue 17/206:20
LHR
-
SEA
1 stop13h 05m
Virgin Atlantic
Tue 24/208:30
SEA
-
LHR
1 stop16h 15m
Virgin Atlantic
Deal found 1/2£365
Sat 25/415:40
LGW
-
SEA
1 stop13h 00m
Icelandair
Sat 2/519:00
SEA
-
LGW
1 stop11h 40m
Icelandair
Deal found 2/2£366
Mon 16/206:30
LHR
-
SEA
1 stop13h 40m
Lufthansa
Mon 2/315:40
SEA
-
LHR
1 stop12h 10m
Lufthansa
Deal found 1/2£367
Thu 9/413:05
LHR
-
SEA
1 stop12h 50m
Icelandair
Mon 4/515:40
SEA
-
LHR
1 stop20h 40m
Icelandair
Deal found 31/1£369
Wed 9/915:40
LGW
-
SEA
1 stop13h 00m
Icelandair
Thu 24/919:00
SEA
-
LGW
1 stop11h 40m
Icelandair
Deal found 1/2£372
Sun 6/915:40
LGW
-
SEA
1 stop34h 15m
Icelandair
Sun 20/915:40
SEA
-
LGW
1 stop15h 00m
Icelandair
Deal found 1/2£373
Fri 9/1021:25
LHR
-
SEA
1 stop31h 15m
Icelandair
Mon 12/1019:00
SEA
-
LHR
1 stop17h 20m
Icelandair
Deal found 1/2£373
Fri 4/915:40
LGW
-
SEA
1 stop13h 00m
Icelandair
Sun 27/919:00
SEA
-
LGW
1 stop11h 40m
Icelandair
Deal found 31/1£374
Wed 18/212:20
LHR
-
SEA
Nonstop10h 25m
Virgin Atlantic
Wed 25/213:38
SEA
-
LHR
1 stop12h 22m
Virgin Atlantic
Deal found 1/2£374

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 2 February 2026.

Round-trip from

£360

One-way from

£307

Popular in

July

Cheapest in

February

Average price

£450

Good round-trip deal

£447 or less

Good one-way deal

£451 or less
Aer Lingus
  • Aer Lingus
  • 16/2-2/3
  • 2 total stops
  • 25h 40m total
  • London to Washington
Search Deals
27/5
  • 27/5
  • 3 total stops
  • 47h 05m total
  • London to Washington
Search Deals
Highest demand for flights based on searches. 13% potential increase in price (£57 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 February 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 2 February 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

LGW - SEA

LGWSEA

London Gatwick

Sat 25/4

15:40-20:40

1 stop13h 00m

Seattle/Tacoma Intl

Sat 2/5

19:00-14:40

1 stop11h 40m

£366

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Wed 18/3

12:20-15:40

Nonstop10h 20m

Seattle/Tacoma Intl

Wed 25/3

13:32-10:00

1 stop13h 28m

£374

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Mon 2/3

06:30-11:35

1 stop13h 05m

Seattle/Tacoma Intl

Mon 16/3

17:40-10:30

Nonstop9h 50m

£384

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Wed 18/3

06:35-14:20

1 stop14h 45m

Seattle/Tacoma Intl

Wed 25/3

12:36-13:30

2 stops17h 54m

£394

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Tue 5/5

06:30-16:30

1 stop18h 00m

Seattle/Tacoma Intl

Mon 11/5

05:30-07:10

1 stop17h 40m

£395

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Wed 25/2

12:20-14:45

Nonstop10h 25m

Seattle/Tacoma Intl

Wed 11/3

17:40-10:30

Nonstop9h 50m

£397

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Wed 22/4

11:30-17:38

1 stop14h 08m

Seattle/Tacoma Intl

Tue 28/4

21:45-15:35

Nonstop9h 50m

£400

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Mon 16/2

12:20-14:45

Nonstop10h 25m

Seattle/Tacoma Intl

Mon 2/3

16:45-10:30

Nonstop9h 45m

£400

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Tue 24/2

11:55-17:00

1 stop13h 05m

Seattle/Tacoma Intl

Tue 3/3

14:35-10:55

1 stop12h 20m

£402

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Sat 14/2

06:30-12:10

1 stop13h 40m

Seattle/Tacoma Intl

Sat 21/2

10:55-07:55

1 stop13h 00m

£407

Flights are sorted by cheapest return flights first.

Deals found on 31/1

Showing 1-10 of 60 results
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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, March is the cheapest month in which you can book a flight from London to State of Washington (average of £297). Flying from London to State of Washington in August is currently the most expensive (average of £451). 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 2 February 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 2 February 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).

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 2 February 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
1,446 reviews
Check prices

Comfort

7.6

Crew

8.4

Food

7.3

Overall

7.7

Entertainment

7.1

Boarding

7.8

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.
KLM
7.7
Good
1,446 reviews
KLM
7.7
Good
1,446 reviews
Check prices

Comfort

7.6

Crew

8.4

Food

7.3

Overall

7.7

Entertainment

7.1

Boarding

7.8

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.
Virgin Atlantic
7.5
Good
678 reviews
KLM
7.7
Good
1,446 reviews
Check prices

Comfort

7.6

Crew

8.4

Food

7.3

Overall

7.7

Entertainment

7.1

Boarding

7.8

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.
Air France
7.4
Good
1,530 reviews
KLM
7.7
Good
1,446 reviews
Check prices

Comfort

7.6

Crew

8.4

Food

7.3

Overall

7.7

Entertainment

7.1

Boarding

7.8

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.
Icelandair
7.1
Good
606 reviews
KLM
7.7
Good
1,446 reviews
Check prices

Comfort

7.6

Crew

8.4

Food

7.3

Overall

7.7

Entertainment

7.1

Boarding

7.8

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.
British Airways
6.7
Okay
7,707 reviews
KLM
7.7
Good
1,446 reviews
Check prices

Comfort

7.6

Crew

8.4

Food

7.3

Overall

7.7

Entertainment

7.1

Boarding

7.8

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.

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 20m. Fly via Icelandair, 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 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: KLM (89%), Air France (89%), Delta (89%).

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

    On average you can expect to pay £1,685 for a flight from London to State of Washington. The cheapest flight overall is £390 while the most popular route, (London Heathrow - Seattle/Tacoma Intl) is currently priced at £305.

  • 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 £297). Flying from London to State of Washington in August is currently the most expensive (average of £451). 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 2 February 2026.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest£329Average£524FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
IcelandairCheapest£336Average£475FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
IberiaCheapest£398Average£611FlexibilityNo cancel feeOn-time77%
Search Iberia flights
Aer LingusCheapest£409Average£658FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
Air CanadaCheapest£412Average£488FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapest£422Average£592FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Virgin AtlanticCheapest£422Average£600FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
FinnairCheapest£428Average£573FlexibilityNo cancel feeOn-time76%
Search Finnair flights
DeltaCheapest£432Average£602FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
KLMCheapest£433Average£600FlexibilityNo cancel feeOn-time75%
Search KLM 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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