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$545+ 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 6/23. Fares are subject to change and may not be available on all flights or dates of travel.
LON — SEA
May 4 — May 111
Sun 5/4
Sun 5/11
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 April 29, 2025.

Most accurate provider

AranGrant
3 stars

Most trusted provider

AranGrant
3 stars

Round-trip from

$616
(lastminute.com)

One-way from

$545
(Kiwi.com)

Popular in

August

Cheapest in

January

Average price

$709

Good round-trip deal

$694 or less

Good one-way deal

$765 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. 16% potential increase in price ($147 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($24 potential savings vs. average RT price).
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Average for round-trip flights in April 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 April 29, 2025.

This Gotogate deal was found by Cheapflights users on 4/29. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/203:40 pmLGW - SEA
1 stop13h 00mIcelandair
Sat 10/113:45 pmSEA - LGW
1 stop14h 55mIcelandair
Deal found 4/29$613
This lastminute.com deal was found by Cheapflights users on 4/29. 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 lastminute.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/89:25 pmLHR - SEA
1 stop28h 25mIcelandair
Thu 5/2211:30 pmSEA - LHR
1 stop12h 50mIcelandair
Deal found 4/29$616
This Lufthansa deal was found by Cheapflights users on 4/29. 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.
Wed 9/179:00 amLHR - SEA
1 stop15h 59mMultiple Airlines
Thu 9/2510:55 amSEA - LHR
1 stop13h 25mMultiple Airlines
Deal found 4/29$618
This Cheapflightsfares deal was found by Cheapflights users on 4/29. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/177:40 amLHR - SEA
1 stop18h 10mBritish Airways
Thu 9/258:20 pmSEA - LHR
Nonstop9h 20mBritish Airways
Deal found 4/29$619
This lol.travel deal was found by Cheapflights users on 4/29. 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 lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/57:30 pmLHR - SEA
1 stop26h 20mScandinavian Airlines
Mon 6/94:00 pmSEA - LHR
1 stop18h 30mScandinavian Airlines
Deal found 4/29$621
This Mytrip deal was found by Cheapflights users on 4/29. 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 5/87:35 amSTN - SEA
2 stops18h 15mMultiple Airlines
Thu 5/223:45 pmSEA - STN
2 stops17h 40mMultiple Airlines
Deal found 4/29$623
This United Airlines deal was found by Cheapflights users on 4/29. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/107:25 amLHR - SEA
1 stop17h 34mUnited Airlines
Mon 9/1510:55 pmSEA - LHR
1 stop24h 00mUnited Airlines
Deal found 4/29$623
This Gotogate deal was found by Cheapflights users on 4/29. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/88:30 amLHR - SEA
2 stops19h 07mAir Canada
Thu 5/227:20 amSEA - LHR
1 stop18h 40mAir Canada
Deal found 4/29$635
This The Travel House deal was found by Cheapflights users on 4/29. 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.
Tue 5/136:35 pmLGW - SEA
2 stops34h 56mSWISS
Sun 5/1812:45 pmSEA - LGW
2 stops45h 05mSWISS
Deal found 4/29$641
This World Air Fares deal was found by Cheapflights users on 4/29. 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 World Air Fares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/299:15 amLHR - SEA
2 stops19h 15mFinnair
Wed 9/1711:59 pmSEA - LHR
2 stops25h 46mFinnair
Deal found 4/29$644
This EaseMyTrip deal was found by Cheapflights users on 4/29. 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 EaseMyTrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/136:15 amLHR - SEA
1 stop13h 00mVirgin Atlantic
Fri 5/238:20 pmSEA - LHR
Nonstop9h 55mVirgin Atlantic
Deal found 4/29$656
This Cheapflightsfares deal was found by Cheapflights users on 4/29. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/179:05 amLCY - SEA
1 stop16h 45mBritish Airways
Thu 9/257:35 pmSEA - LCY
1 stop14h 45mBritish Airways
Deal found 4/29$658

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 April 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

Sat 9/20

3:40 pm-8:40 pm

1 stop13h 00m

Seattle/Tacoma Intl

Sat 10/11

3:45 pm-2:40 pm

1 stop14h 55m

$613

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Thu 5/8

9:25 pm-5:50 pm

1 stop28h 25m

Seattle/Tacoma Intl

Thu 5/22

11:30 pm-8:20 pm

1 stop12h 50m

$616

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Thu 6/5

7:30 pm-1:50 pm

1 stop26h 20m

Seattle/Tacoma Intl

Mon 6/9

4:00 pm-6:30 pm

1 stop18h 30m

$621

LondonSeattle

STN - SEA

STNSEA

London Stansted

Thu 5/8

7:35 am-5:50 pm

2 stops18h 15m

Seattle/Tacoma Intl

Thu 5/22

3:45 pm-5:25 pm

2 stops17h 40m

$623

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Thu 5/8

6:50 am-6:52 pm

2 stops20h 02m

Seattle/Tacoma Intl

Thu 5/22

7:10 am-7:40 am

1 stop16h 30m

$629

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Thu 5/8

8:30 am-7:37 pm

2 stops19h 07m

Seattle/Tacoma Intl

Thu 5/22

7:20 am-10:00 am

1 stop18h 40m

$635

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Tue 5/13

6:20 am-4:59 pm

1 stop18h 39m

Seattle/Tacoma Intl

Tue 5/20

1:30 pm-6:50 am

Nonstop9h 20m

$639

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Tue 5/13

8:45 am-6:33 pm

2 stops17h 48m

Seattle/Tacoma Intl

Fri 5/23

5:30 am-11:50 am

2 stops22h 20m

$640

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Tue 5/13

6:35 pm-9:31 pm

2 stops34h 56m

Seattle/Tacoma Intl

Sun 5/18

12:45 pm-5:50 pm

2 stops45h 05m

$641

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Tue 5/13

6:15 am-11:15 am

1 stop13h 00m

Seattle/Tacoma Intl

Fri 5/23

8:20 pm-2:15 pm

Nonstop9h 55m

$656

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/28

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 July is currently the most expensive (average of $405). 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 April 29, 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 April 29, 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).

Rainfall in Washington by month

Plan your trip to Washington by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in State of Washington ranges from 0.7 - 6.6 inches per month. November is typically the wettest month, when rainfall can reach 6.6 in. July is typically the driest time to visit State of Washington when rainfall is around 0.7 in.

Temperature in Washington by month

Plan your trip to Washington by taking into account the average temperature totals by month.

If weather is an important factor for your trip to State of Washington, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 66.2 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 41.0 F).

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 April 29, 2025.
See what other customers who have flown with Delta, KLM and Finnair from London to Washington have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,936 reviews

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Food

7.3

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Delta
8.0
Very good
7,936 reviews
Delta
8.0
Very good
7,936 reviews

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Food

7.3

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
KLM
7.8
Good
1,333 reviews
Delta
8.0
Very good
7,936 reviews

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Food

7.3

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Finnair
7.6
Good
1,273 reviews
Delta
8.0
Very good
7,936 reviews

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Food

7.3

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
SWISS
7.5
Good
1,588 reviews
Delta
8.0
Very good
7,936 reviews

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Food

7.3

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Air France
7.4
Good
1,446 reviews
Delta
8.0
Very good
7,936 reviews

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Food

7.3

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

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 $548. 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 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 Singapore Airlines (94%), Aeromexico (92%) and KLM (91%).

  • 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 $1,663, our data indicates the cheapest price to be $661. The most popular route (London Heathrow - Seattle/Tacoma Intl), is priced around $586.

  • 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 July is currently the most expensive (average of $405). 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 7 airlines flying from London to Washington

Discover the top 7 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 April 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$402Average$691FlexibilityNo cancel feeOn-time76%
British AirwaysCheapest$560Average$771FlexibilityNo cancel feeOn-time70%
American AirlinesCheapest$620Average$891FlexibilityNo cancel feeOn-time71%
Virgin AtlanticCheapest$635Average$978FlexibilityNo cancel feeOn-time72%
IberiaCheapest$673Average$1,001FlexibilityNo cancel feeOn-time77%
KLMCheapest$674Average$844FlexibilityNo cancel feeOn-time75%
DeltaCheapest$675Average$871FlexibilityNo cancel feeOn-timeN/A

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