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$393+ Cheap flights from London (LON) to Washington

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 1/22. Fares are subject to change and may not be available on all flights or dates of travel.
LON — SEA
Nov 28 — Dec 51
Fri 11/28
Fri 12/5
1 adult, Economy
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Cheap flight deals from London to Washington

Keep the following information in mind while searching for London to Washington flight deals. Data was last updated October 29, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$595
(Gotogate)

One-way from

$393
(Kiwi.com)

Popular in

July

Cheapest in

January

Average price

$726

Good round-trip deal

$787 or less

Good one-way deal

$679 or less
Provider with most accurate pricing for London (LON)-Seattle/Tacoma Intl flight deals.
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Provider most trusted by Cheapflights users for London (LON)-Seattle/Tacoma Intl flights.
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From London (LON) to Washington
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One-way flight from London (LON) to Washington
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Highest demand for flights based on searches. 12% potential increase in price ($104 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($15 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
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Price to beat on a round-trip flight from London (LON) to Washington.
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Price to beat on a one-way flight from London (LON) to Washington.
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Find flight deals from London to Washington

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 October 29, 2025.

This Gotogate deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/2511:55 amLGW - SEA
1 stop13h 05mIcelandair
Tue 12/22:35 pmSEA - LGW
1 stop12h 20mIcelandair
Deal found 10/28$595
This Gotogate deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/158:35 pmLHR - SEA
1 stop28h 25mIcelandair
Thu 1/152:35 pmSEA - LHR
1 stop20h 55mIcelandair
Deal found 10/28$595
This Gotogate deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/168:35 pmLHR - SEA
1 stop28h 25mIcelandair
Wed 1/142:35 pmSEA - LHR
1 stop20h 55mIcelandair
Deal found 10/27$596
This Gotogate deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/248:35 pmLHR - SEA
1 stop28h 25mIcelandair
Mon 12/82:35 pmSEA - LHR
1 stop20h 55mIcelandair
Deal found 10/27$599
This Travelis deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Travelis is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/2411:55 amLGW - SEA
1 stop13h 05mIcelandair
Mon 12/82:35 pmSEA - LGW
1 stop12h 20mIcelandair
Deal found 10/27$600
This Gotogate deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/118:35 pmLHR - SEA
1 stop28h 25mIcelandair
Tue 11/182:35 pmSEA - LHR
1 stop12h 15mIcelandair
Deal found 10/28$600
This Gotogate deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1212:15 pmLHR - SEA
1 stop12h 45mIcelandair
Thu 11/202:35 pmSEA - LHR
1 stop20h 55mIcelandair
Deal found 10/27$601
This Gotogate deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/512:15 pmLHR - SEA
1 stop12h 45mIcelandair
Thu 11/132:35 pmSEA - LHR
1 stop20h 55mIcelandair
Deal found 10/27$602
This The Travel House deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure The Travel House is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/28:35 pmLHR - SEA
1 stop28h 25mIcelandair
Tue 12/92:35 pmSEA - LHR
1 stop20h 55mIcelandair
Deal found 10/28$605
This Justfly.com deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/2411:55 amLGW - SEA
1 stop13h 05mIcelandair
Mon 12/12:35 pmSEA - LGW
1 stop12h 20mIcelandair
Deal found 10/27$611
This FlightHub deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1211:55 amLGW - SEA
1 stop13h 05mIcelandair
Wed 12/32:35 pmSEA - LGW
1 stop12h 20mIcelandair
Deal found 10/27$612
This oojo deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/511:55 amLGW - SEA
1 stop13h 05mIcelandair
Thu 11/132:35 pmSEA - LGW
1 stop12h 20mIcelandair
Deal found 10/27$613

Cheapflights Fare Finder

 
Customize 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 2,558,603 searches. Data last updated October 29, 2025.
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

Tue 11/11

11:55 am-5:00 pm

1 stop13h 05m

Seattle/Tacoma Intl

Mon 11/17

2:35 pm-10:55 am

1 stop12h 20m

$635

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Wed 11/12

11:55 am-5:00 pm

1 stop13h 05m

Seattle/Tacoma Intl

Wed 11/19

2:35 pm-10:55 am

1 stop12h 20m

$635

LondonSeattle

LTN - SEA

LTNSEA

London Luton

Thu 12/4

6:00 am-5:00 pm

1 stop19h 00m

Seattle/Tacoma Intl

Mon 12/8

2:35 pm-2:00 pm

1 stop15h 25m

$637

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Wed 11/12

12:15 pm-5:00 pm

1 stop12h 45m

Seattle/Tacoma Intl

Thu 11/20

2:35 pm-10:50 am

1 stop12h 15m

$639

LondonSeattle

LTN - SEA

LTNSEA

London Luton

Wed 11/12

8:00 am-5:00 pm

1 stop17h 00m

Seattle/Tacoma Intl

Sun 11/30

2:35 pm-2:50 pm

1 stop16h 15m

$642

LondonSeattle

STN - SEA

STNSEA

London Stansted

Mon 11/17

10:15 am-6:20 pm

1 stop16h 05m

Seattle/Tacoma Intl

Sun 11/30

8:05 pm-4:35 pm

1 stop12h 30m

$644

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Wed 2/25

11:45 am-11:40 am

1 stop31h 55m

Seattle/Tacoma Intl

Wed 3/4

4:45 pm-10:30 am

Nonstop9h 45m

$653

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Thu 2/26

6:30 am-11:40 am

1 stop13h 10m

Seattle/Tacoma Intl

Mon 3/9

5:40 pm-10:30 am

Nonstop9h 50m

$653

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Wed 2/25

6:30 am-11:40 am

1 stop13h 10m

Seattle/Tacoma Intl

Thu 3/5

7:20 pm-12:50 pm

Nonstop9h 30m

$653

LondonSeattle

LTN - SEA

LTNSEA

London Luton

Fri 11/21

5:50 am-6:20 pm

1 stop20h 30m

Seattle/Tacoma Intl

Sun 11/30

8:05 pm-4:45 pm

1 stop12h 40m

$653

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/28

Showing 1-10 of 60 results
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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 round-trip 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 $410). Flying from London to State of Washington in August is currently the most expensive (average of $617). 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 October 29, 2025.

It’s optimal to fly from London to State of Washington in the morning. By choosing this option you can save up to 13% on the cost of your flight, compared to a flight in the evening.

What is the cheapest day to fly from London to State of Washington?

Use this chart to determine the cheapest time to fly round-trip from London to Washington. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their London to State of Washington flight should consider departing on Monday mornings when fares are most often at their lowest. Thursday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

How much does it cost to fly round-trip 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 October 29, 2025.
Read through reviews of airlines operating flights from London to Washington, such as Delta, Virgin Atlantic, and United Airlines. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
7,993 reviews

Overall

7.9

Boarding

8.2

Entertainment

7.9

Crew

8.5

Food

7.3

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Mary,Oct 2025

AMS - PDX

It's specail being able to fly non-stop from Amsterdam all the way home to Portland, Oregon!
Delta
7.9
Good
7,993 reviews
Delta
7.9
Good
7,993 reviews

Overall

7.9

Boarding

8.2

Entertainment

7.9

Crew

8.5

Food

7.3

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Mary,Oct 2025

AMS - PDX

It's specail being able to fly non-stop from Amsterdam all the way home to Portland, Oregon!
Virgin Atlantic
7.5
Good
670 reviews
Delta
7.9
Good
7,993 reviews

Overall

7.9

Boarding

8.2

Entertainment

7.9

Crew

8.5

Food

7.3

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Mary,Oct 2025

AMS - PDX

It's specail being able to fly non-stop from Amsterdam all the way home to Portland, Oregon!
United Airlines
7.4
Good
8,998 reviews
Delta
7.9
Good
7,993 reviews

Overall

7.9

Boarding

8.2

Entertainment

7.9

Crew

8.5

Food

7.3

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Mary,Oct 2025

AMS - PDX

It's specail being able to fly non-stop from Amsterdam all the way home to Portland, Oregon!
Icelandair
7.1
Good
562 reviews
Delta
7.9
Good
7,993 reviews

Overall

7.9

Boarding

8.2

Entertainment

7.9

Crew

8.5

Food

7.3

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Mary,Oct 2025

AMS - PDX

It's specail being able to fly non-stop from Amsterdam all the way home to Portland, Oregon!
British Airways
6.7
Okay
7,487 reviews
Delta
7.9
Good
7,993 reviews

Overall

7.9

Boarding

8.2

Entertainment

7.9

Crew

8.5

Food

7.3

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Mary,Oct 2025

AMS - PDX

It's specail being able to fly non-stop from Amsterdam all the way home to Portland, Oregon!

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 13h 05m. Fly via Icelandair, Delta, or Virgin Atlantic to get the fastest option. There are 4807 mi between London and State of Washington. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines to fly from London to State of Washington one-way?

    The cheapest airline one-way is Lufthansa, with whom users have recently found tickets for as low as $534. However, be on the lookout for offers from British Airways and Delta, as they are both options that can get you from London to State of Washington for a low price.

  • What are the most popular routes from London to State of Washington?

    While some choose either London Gatwick - Seattle/Tacoma Intl or London Heathrow - Portland, 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?

    The top 3 most reliable airlines when flying from London to State of Washington are Scandinavian Airlines (95%), KLM (87%) and Air France (87%).

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

    Looking for the cheapest flight from London to State of Washington? While on average our users pay $2,172, our data indicates the cheapest price to be $592. The most popular route (London Heathrow - Seattle/Tacoma Intl), is priced around $528.

  • 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 vacation 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 $410). Flying from London to State of Washington in August is currently the most expensive (average of $617). 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 5 airlines flying from London to Washington

Discover the top 5 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 2,558,603 searches. Data last updated October 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$418Average$771FlexibilityNo cancel feeOn-time76%
British AirwaysCheapest$553Average$751FlexibilityNo cancel feeOn-time70%
American AirlinesCheapest$589Average$813FlexibilityNo cancel feeOn-time71%
Virgin AtlanticCheapest$594Average$878FlexibilityNo cancel feeOn-time72%
DeltaCheapest$594Average$826FlexibilityNo cancel feeOn-timeN/A

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