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$523+ 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 9/24. Fares are subject to change and may not be available on all flights or dates of travel.
LON — SEA
Aug 4 — Aug 111
Mon 8/4
Mon 8/11
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 July 30, 2025.

Round-trip from

$650
(ChecknFly)

One-way from

$523
(Kiwi.com)

Popular in

July

Cheapest in

January

Average price

$950

Good round-trip deal

$743 or less

Good one-way deal

$802 or less
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. 15% potential increase in price ($132 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($19 potential savings vs. average RT price).
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Average for round-trip flights in July 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 July 30, 2025.

This ChecknFly deal was found by Cheapflights users on 7/30. 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 ChecknFly is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/279:50 amLHR - SEA
Nonstop9h 45mFinnair
Thu 9/116:00 amSEA - LHR
1 stop19h 05mFinnair
Deal found 7/30$650
This The Travel House deal was found by Cheapflights users on 7/30. 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.
Sat 8/231:00 pmLGW - SEA
1 stop12h 50mIcelandair
Mon 8/2511:30 pmSEA - LGW
1 stop31h 10mIcelandair
Deal found 7/30$652
This Cheapflightsfares deal was found by Cheapflights users on 7/30. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/109:50 amLHR - SEA
Nonstop9h 45mBritish Airways
Mon 9/151:30 pmSEA - LHR
Nonstop9h 20mBritish Airways
Deal found 7/30$652
This The Travel House deal was found by Cheapflights users on 7/29. 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.
Wed 8/276:05 pmLHR - SEA
2 stops51h 45mScandinavian Airlines
Wed 9/104:00 pmSEA - LHR
2 stops21h 35mScandinavian Airlines
Deal found 7/29$655
This Kiwi.com deal was found by Cheapflights users on 7/29. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/17:45 amLHR - SEA
2 stops20h 57mBrussels Airlines
Mon 9/1510:55 amSEA - LHR
1 stop13h 25mBrussels Airlines
Deal found 7/29$657
This SWISS deal was found by Cheapflights users on 7/30. 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 SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/169:25 amLCY - SEA
2 stops17h 11mSWISS
Tue 9/3010:50 amSEA - LCY
2 stops22h 40mSWISS
Deal found 7/30$658
This Expedia deal was found by Cheapflights users on 7/30. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/279:50 amLHR - SEA
Nonstop9h 45mMultiple Airlines
Wed 9/103:00 pmSEA - LHR
1 stop13h 15mMultiple Airlines
Deal found 7/30$658
This Kiwi.com deal was found by Cheapflights users on 7/28. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1110:45 amLGW - SEA
1 stop16h 51mMultiple Airlines
Tue 9/166:05 pmSEA - LGW
2 stops28h 15mMultiple Airlines
Deal found 7/28$659
This Mytrip deal was found by Cheapflights users on 7/29. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/136:15 pmLCY - SEA
1 stop25h 55mLufthansa
Mon 11/172:00 pmSEA - LCY
1 stop19h 40mLufthansa
Deal found 7/29$659
This Icelandair deal was found by Cheapflights users on 7/29. 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 Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/189:25 pmLHR - SEA
1 stop22h 00mIcelandair
Mon 8/2511:30 pmSEA - LHR
1 stop28h 25mIcelandair
Deal found 7/29$659
This Lufthansa deal was found by Cheapflights users on 7/29. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/89:25 amLCY - SEA
1 stop13h 30mMultiple Airlines
Sun 9/212:20 pmSEA - LCY
1 stop20h 15mMultiple Airlines
Deal found 7/29$660
This United Airlines deal was found by Cheapflights users on 7/30. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/279:30 amLHR - SEA
1 stop19h 15mUnited Airlines
Tue 9/97:10 amSEA - LHR
2 stops17h 10mUnited Airlines
Deal found 7/30$660

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 July 30, 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

LHR - SEA

LHRSEA

London Heathrow

Wed 8/27

9:50 am-11:35 am

Nonstop9h 45m

Seattle/Tacoma Intl

Thu 9/11

8:03 am-7:40 am

1 stop15h 37m

$650

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Sat 8/23

1:00 pm-5:50 pm

1 stop12h 50m

Seattle/Tacoma Intl

Mon 8/25

11:30 pm-2:40 pm

1 stop31h 10m

$652

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Wed 9/10

9:50 am-11:35 am

Nonstop9h 45m

Seattle/Tacoma Intl

Mon 9/15

1:30 pm-6:50 am

Nonstop9h 20m

$652

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Wed 8/27

6:05 pm-1:50 pm

2 stops51h 45m

Seattle/Tacoma Intl

Wed 9/10

4:00 pm-9:35 pm

2 stops21h 35m

$655

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Mon 9/1

9:30 am-8:45 pm

1 stop19h 15m

Seattle/Tacoma Intl

Mon 9/15

10:00 am-9:35 am

2 stops15h 35m

$657

LondonSeattle

LCY - SEA

LCYSEA

London City

Tue 9/16

9:25 am-6:36 pm

2 stops17h 11m

Seattle/Tacoma Intl

Tue 9/30

10:50 am-5:30 pm

2 stops22h 40m

$658

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Wed 8/27

9:50 am-11:35 am

Nonstop9h 45m

Seattle/Tacoma Intl

Wed 9/10

3:00 pm-12:15 pm

1 stop13h 15m

$658

LondonSeattle

LCY - SEA

LCYSEA

London City

Thu 11/13

6:15 pm-12:10 pm

1 stop25h 55m

Seattle/Tacoma Intl

Mon 11/17

2:00 pm-5:40 pm

1 stop19h 40m

$659

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Thu 9/11

10:45 am-7:36 pm

1 stop16h 51m

Seattle/Tacoma Intl

Tue 9/16

6:05 pm-6:20 am

2 stops28h 15m

$659

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Mon 8/18

9:25 pm-11:25 am

1 stop22h 00m

Seattle/Tacoma Intl

Mon 8/25

11:30 pm-11:55 am

1 stop28h 25m

$659

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/28

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, January is the cheapest month in which you can book a flight from London to State of Washington (average of $238). Flying from London to State of Washington in June is currently the most expensive (average of $389). 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 July 30, 2025.

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 July 30, 2025.

The most flights from LON to USWA are scheduled on a Monday (22 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (11 on average).

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 July 30, 2025.
Read through reviews of airlines operating flights from London to Washington, such as Delta, KLM, and Austrian Airlines. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,980 reviews

Boarding

8.2

Comfort

7.9

Food

7.3

Entertainment

7.9

Overall

8.0

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
Delta
8.0
Very good
7,980 reviews
Delta
8.0
Very good
7,980 reviews

Boarding

8.2

Comfort

7.9

Food

7.3

Entertainment

7.9

Overall

8.0

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
KLM
7.8
Good
1,383 reviews
Delta
8.0
Very good
7,980 reviews

Boarding

8.2

Comfort

7.9

Food

7.3

Entertainment

7.9

Overall

8.0

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
Austrian Airlines
7.6
Good
823 reviews
Delta
8.0
Very good
7,980 reviews

Boarding

8.2

Comfort

7.9

Food

7.3

Entertainment

7.9

Overall

8.0

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
Finnair
7.6
Good
1,316 reviews
Delta
8.0
Very good
7,980 reviews

Boarding

8.2

Comfort

7.9

Food

7.3

Entertainment

7.9

Overall

8.0

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
SWISS
7.5
Good
1,686 reviews
Delta
8.0
Very good
7,980 reviews

Boarding

8.2

Comfort

7.9

Food

7.3

Entertainment

7.9

Overall

8.0

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.

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.

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

    The cheapest airline one-way is Aer Lingus, with whom users have recently found tickets for as low as $543. However, be on the lookout for offers from WestJet and Icelandair, 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 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?

    The top 3 most reliable airlines when flying from London to State of Washington are Scandinavian Airlines (97%), KLM (94%) and Air France (94%).

  • 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 $2,627, our data indicates the cheapest price to be $676. The most popular route (London Heathrow - Seattle/Tacoma Intl), is priced around $538.

  • 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, January is the cheapest month in which you can book a flight from London to State of Washington (average of $238). Flying from London to State of Washington in June is currently the most expensive (average of $389). 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.

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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 6 airlines flying from London to Washington

Discover the top 6 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 July 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$402Average$787FlexibilityNo cancel feeOn-time76%
British AirwaysCheapest$560Average$765FlexibilityNo cancel feeOn-time70%
IberiaCheapest$575Average$781FlexibilityNo cancel feeOn-time77%
Virgin AtlanticCheapest$594Average$918FlexibilityNo cancel feeOn-time72%
American AirlinesCheapest$620Average$813FlexibilityNo cancel feeOn-time71%
DeltaCheapest$632Average$852FlexibilityNo cancel feeOn-timeN/A

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