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Cheap flights from London to Washington from £296

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 31/8. Fares are subject to change and may not be available on all flights or dates of travel.
LON — SEA
15 Jul — 22 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 15 June 2026.

Mon 7/908:25
LCY
-
SEA
1 stop16h 10m
KLM
Wed 16/910:45
SEA
-
LCY
2 stops14h 05m
KLM
Deal found 11/6£516
Fri 4/911:40
LHR
-
SEA
Nonstop10h 20m
KLM
Mon 7/918:20
SEA
-
LHR
Nonstop9h 50m
KLM
Deal found 15/6£516
Fri 25/915:40
LGW
-
SEA
1 stop13h 00m
Icelandair
Fri 12/314:35
SEA
-
LGW
1 stop12h 20m
Icelandair
Deal found 11/6£517
Fri 14/810:00
LCY
-
SEA
1 stop14h 27m
Delta
Sun 30/813:50
SEA
-
LCY
1 stop11h 40m
Delta
Deal found 11/6£517
Tue 28/717:45
LHR
-
SEA
Nonstop10h 18m
Delta
Fri 14/821:45
SEA
-
LHR
Nonstop9h 50m
Delta
Deal found 11/6£517
Fri 4/910:25
LGW
-
SEA
2 stops20h 55m
Virgin Atlantic
Thu 10/913:30
SEA
-
LGW
1 stop18h 30m
Virgin Atlantic
Deal found 12/6£517
Mon 20/709:20
LCY
-
SEA
1 stop34h 13m
Virgin Atlantic
Thu 6/817:45
SEA
-
LCY
1 stop31h 05m
Virgin Atlantic
Deal found 11/6£517
Mon 31/820:45
STN
-
SEA
3 stops32h 22m
Multiple Airlines
Wed 9/1214:35
SEA
-
STN
2 stops25h 00m
Multiple Airlines
Deal found 11/6£517
Thu 6/806:30
LHR
-
SEA
1 stop13h 07m
Delta
Mon 10/821:45
SEA
-
LHR
1 stop28h 30m
Delta
Deal found 11/6£517
Tue 7/713:00
LGW
-
SEA
1 stop15h 40m
Icelandair
Fri 24/719:00
SEA
-
LGW
1 stop11h 40m
Icelandair
Deal found 12/6£518
Mon 17/810:00
LCY
-
SEA
1 stop14h 27m
KLM
Mon 24/813:50
SEA
-
LCY
1 stop11h 40m
KLM
Deal found 11/6£518
Mon 13/721:25
LHR
-
SEA
1 stop22h 20m
Icelandair
Sun 26/715:40
SEA
-
LHR
1 stop12h 15m
Icelandair
Deal found 12/6£518

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 15 June 2026.

Round-trip from

£495

One-way from

£296

Popular in

July

Cheapest in

February

Average price

£619

Good round-trip deal

£568 or less

Good one-way deal

£599 or less
British Airways
  • British Airways
  • 15/10-19/10
  • Nonstop
  • 19h 00m total
  • London to Washington
Search Deals
31/8
  • 31/8
  • 3 total stops
  • 39h 20m total
  • London to Washington
Search Deals
Highest demand for flights based on searches. 10% potential increase in price (£51 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 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 15 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

LHR - SEA

LHRSEA

London Heathrow

Fri 4/9

17:45-20:10

Nonstop10h 25m

Seattle/Tacoma Intl

Wed 16/9

18:20-12:10

Nonstop9h 50m

£517

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Fri 4/9

11:40-14:00

Nonstop10h 20m

Seattle/Tacoma Intl

Mon 7/9

18:20-12:10

Nonstop9h 50m

£522

LondonSeattle

LCY - SEA

LCYSEA

London City

Mon 13/7

07:45-16:20

1 stop16h 35m

Seattle/Tacoma Intl

Mon 20/7

13:45-09:30

1 stop11h 45m

£523

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Tue 11/8

06:20-17:10

1 stop18h 50m

Seattle/Tacoma Intl

Sun 6/9

20:20-13:45

Nonstop9h 25m

£526

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Wed 19/8

07:25-19:07

2 stops19h 42m

Seattle/Tacoma Intl

Sun 30/8

18:15-20:40

2 stops18h 25m

£527

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Mon 17/8

07:45-19:08

2 stops19h 23m

Seattle/Tacoma Intl

Fri 4/9

18:10-20:40

2 stops18h 30m

£527

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Wed 29/7

08:40-16:20

1 stop15h 40m

Seattle/Tacoma Intl

Wed 5/8

21:45-15:35

Nonstop9h 50m

£532

LondonSeattle

LCY - SEA

LCYSEA

London City

Thu 6/8

10:00-16:27

1 stop14h 27m

Seattle/Tacoma Intl

Fri 14/8

09:35-08:50

2 stops15h 15m

£532

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Tue 21/7

06:30-11:33

1 stop13h 03m

Seattle/Tacoma Intl

Mon 7/12

13:30-10:00

1 stop12h 30m

£533

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Sun 13/9

09:05-18:32

2 stops17h 27m

Seattle/Tacoma Intl

Mon 21/9

07:00-08:25

2 stops17h 25m

£535

Flights are sorted by cheapest return flights first.

Deals found on 11/6

Showing 1-10 of 60 resultsSorted by cheapest first
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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 November is currently the most expensive (average of £1,214). 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 15 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 15 June 2026.

The most flights from LON to USWA are scheduled on a Monday (22 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (22 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 15 June 2026.
Check out reviews from past customers who have flown with Alaska Airlines,KLM, 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.
Alaska Airlines
7.9
Good
12,521 reviews
Check prices

Crew

8.5

Overall

7.9

Comfort

7.8

Entertainment

7.0

Food

7.1

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Jun 2026

LHR - SEA

It's my first time flying with Alaska Airlines. All in all it was very good. Excellent crew and the meal was really good .. best mashed potato!! Black point: not waking me up for breakfast. Having departed late from London and arriving in Seattle late at night, it would have been nice to have found a meal on the table when i woke up. Although the crew was very lovely, kind and helpful, I did find it a little regimented in their approach. Also the constant interruptions announcing what we were eating next and unnecessary announcements.
Alaska Airlines
7.9
Good
12,521 reviews
Alaska Airlines
7.9
Good
12,521 reviews
Check prices

Crew

8.5

Overall

7.9

Comfort

7.8

Entertainment

7.0

Food

7.1

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Jun 2026

LHR - SEA

It's my first time flying with Alaska Airlines. All in all it was very good. Excellent crew and the meal was really good .. best mashed potato!! Black point: not waking me up for breakfast. Having departed late from London and arriving in Seattle late at night, it would have been nice to have found a meal on the table when i woke up. Although the crew was very lovely, kind and helpful, I did find it a little regimented in their approach. Also the constant interruptions announcing what we were eating next and unnecessary announcements.
KLM
7.8
Good
1,528 reviews
Alaska Airlines
7.9
Good
12,521 reviews
Check prices

Crew

8.5

Overall

7.9

Comfort

7.8

Entertainment

7.0

Food

7.1

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Jun 2026

LHR - SEA

It's my first time flying with Alaska Airlines. All in all it was very good. Excellent crew and the meal was really good .. best mashed potato!! Black point: not waking me up for breakfast. Having departed late from London and arriving in Seattle late at night, it would have been nice to have found a meal on the table when i woke up. Although the crew was very lovely, kind and helpful, I did find it a little regimented in their approach. Also the constant interruptions announcing what we were eating next and unnecessary announcements.
Virgin Atlantic
7.5
Good
690 reviews
Alaska Airlines
7.9
Good
12,521 reviews
Check prices

Crew

8.5

Overall

7.9

Comfort

7.8

Entertainment

7.0

Food

7.1

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Jun 2026

LHR - SEA

It's my first time flying with Alaska Airlines. All in all it was very good. Excellent crew and the meal was really good .. best mashed potato!! Black point: not waking me up for breakfast. Having departed late from London and arriving in Seattle late at night, it would have been nice to have found a meal on the table when i woke up. Although the crew was very lovely, kind and helpful, I did find it a little regimented in their approach. Also the constant interruptions announcing what we were eating next and unnecessary announcements.
Icelandair
7.0
Good
677 reviews
Alaska Airlines
7.9
Good
12,521 reviews
Check prices

Crew

8.5

Overall

7.9

Comfort

7.8

Entertainment

7.0

Food

7.1

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Jun 2026

LHR - SEA

It's my first time flying with Alaska Airlines. All in all it was very good. Excellent crew and the meal was really good .. best mashed potato!! Black point: not waking me up for breakfast. Having departed late from London and arriving in Seattle late at night, it would have been nice to have found a meal on the table when i woke up. Although the crew was very lovely, kind and helpful, I did find it a little regimented in their approach. Also the constant interruptions announcing what we were eating next and unnecessary announcements.
British Airways
6.7
Okay
8,052 reviews
Alaska Airlines
7.9
Good
12,521 reviews
Check prices

Crew

8.5

Overall

7.9

Comfort

7.8

Entertainment

7.0

Food

7.1

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Jun 2026

LHR - SEA

It's my first time flying with Alaska Airlines. All in all it was very good. Excellent crew and the meal was really good .. best mashed potato!! Black point: not waking me up for breakfast. Having departed late from London and arriving in Seattle late at night, it would have been nice to have found a meal on the table when i woke up. Although the crew was very lovely, kind and helpful, I did find it a little regimented in their approach. Also the constant interruptions announcing what we were eating next and unnecessary announcements.

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 Delta, KLM, 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 Alaska Airlines, which is currently one of the cheapest options available, starting at £282. Icelandair flights start at £353 while deals on British Airways start at £370 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: 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 £1,681 for a flight from London to State of Washington. The cheapest flight overall is £429 while the most popular route, (London Heathrow - Seattle/Tacoma Intl) is currently priced at £299.

  • 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 November is currently the most expensive (average of £1,214). 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 15 June 2026.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest£334Average£506FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
IcelandairCheapest£341Average£502FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Aer LingusCheapest£417Average£703FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
Virgin AtlanticCheapest£428Average£756FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
KLMCheapest£436Average£761FlexibilityNo cancel feeOn-time75%
Search KLM flights
DeltaCheapest£441Average£618FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Air FranceCheapest£450Average£655FlexibilityNo cancel feeOn-time77%
Search Air France flights
Air CanadaCheapest£463Average£498FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
British AirwaysCheapest£464Average£637FlexibilityNo cancel feeOn-time70%
Search British Airways flights
United AirlinesCheapest£466Average£613FlexibilityNo 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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