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$529+ 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 7/31. Fares are subject to change and may not be available on all flights or dates of travel.
LON — SEA
jun. 17 — jun. 241
mar. 6/17
mar. 6/24
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 junio 12, 2025.

Round-trip from

$646
(Cheapflightsfares)

One-way from

$529
(Mytrip)

Popular in

August

Cheapest in

January

Average price

$757

Good round-trip deal

$668 or less

Good one-way deal

$621 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 ($140 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($23 potential savings vs. average RT price).
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Average for round-trip flights in June 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 junio 12, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 6/11. 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.
mié. 9/104:30 pmLHR - SEA
Nonstop9h 50mBritish Airways
dom. 9/148:20 pmSEA - LHR
Nonstop9h 20mBritish Airways
Deal found 6/11$646
This Bravofly deal was found by Cheapflights users on 6/11. 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 Bravofly is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 7/103:40 pmLGW - SEA
1 stop13h 00mIcelandair
jue. 7/2411:30 pmSEA - LGW
1 stop28h 15mIcelandair
Deal found 6/11$647
This TravelUp deal was found by Cheapflights users on 6/10. 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 TravelUp is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 6/176:30 amLHR - SEA
1 stop13h 10mKLM
mar. 6/241:55 pmSEA - LHR
1 stop12h 50mKLM
Deal found 6/10$647
This Booking.com deal was found by Cheapflights users on 6/12. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 7/96:15 amLHR - SEA
1 stop13h 00mVirgin Atlantic
mar. 7/225:35 pmSEA - LHR
Nonstop9h 45mVirgin Atlantic
Deal found 6/12$649
This Delta deal was found by Cheapflights users on 6/11. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 8/3111:45 amLHR - SEA
1 stop32h 00mDelta
lun. 9/88:25 pmSEA - LHR
Nonstop9h 50mDelta
Deal found 6/11$652
This The Travel House deal was found by Cheapflights users on 6/10. 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.
mié. 10/16:40 amLHR - SEA
1 stop15h 20mScandinavian Airlines
mié. 10/2912:00 pmSEA - LHR
2 stops45h 00mScandinavian Airlines
Deal found 6/10$653
This Gotogate deal was found by Cheapflights users on 6/12. 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.
mié. 7/99:25 pmLHR - SEA
1 stop22h 00mIcelandair
lun. 7/2111:30 pmSEA - LHR
1 stop28h 25mIcelandair
Deal found 6/12$654
This SWISS deal was found by Cheapflights users on 6/12. 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.
mié. 10/291:30 pmLCY - SEA
2 stops40h 45mSWISS
sáb. 11/153:37 pmSEA - LCY
2 stops17h 28mSWISS
Deal found 6/12$655
This American Airlines deal was found by Cheapflights users on 6/10. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 8/181:10 pmLHR - SEA
1 stop14h 52mAmerican Airlines
jue. 9/111:07 pmSEA - LHR
1 stop15h 08mAmerican Airlines
Deal found 6/10$656
This Mytrip deal was found by Cheapflights users on 6/12. 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.
vie. 8/225:05 pmSTN - SEA
3 stops28h 45mMultiple Airlines
sáb. 8/304:00 pmSEA - STN
2 stops24h 20mMultiple Airlines
Deal found 6/12$660
This Air Canada deal was found by Cheapflights users on 6/12. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 8/227:30 amLHR - SEA
2 stops19h 06mMultiple Airlines
dom. 9/145:30 amSEA - LHR
2 stops17h 00mMultiple Airlines
Deal found 6/12$662
This Air Canada deal was found by Cheapflights users on 6/11. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 9/108:40 amLHR - SEA
2 stops18h 51mAir Canada
dom. 9/145:30 amSEA - LHR
2 stops17h 00mAir Canada
Deal found 6/11$665

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 junio 12, 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

mié. 9/10

4:30 pm-6:20 pm

Nonstop9h 50m

Seattle/Tacoma Intl

dom. 9/14

8:20 pm-1:40 pm

Nonstop9h 20m

$646

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

jue. 7/10

3:40 pm-8:40 pm

1 stop13h 00m

Seattle/Tacoma Intl

jue. 7/24

11:30 pm-11:45 am

1 stop28h 15m

$647

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

mié. 7/9

9:00 am-5:25 pm

1 stop16h 25m

Seattle/Tacoma Intl

mié. 7/16

8:25 pm-2:15 pm

Nonstop9h 50m

$647

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

mié. 7/9

6:15 am-11:15 am

1 stop13h 00m

Seattle/Tacoma Intl

mar. 7/22

5:35 pm-11:20 am

Nonstop9h 45m

$649

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

dom. 8/31

11:45 am-11:45 am

1 stop32h 00m

Seattle/Tacoma Intl

lun. 9/8

8:25 pm-2:15 pm

Nonstop9h 50m

$652

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

mié. 10/1

6:40 am-2:00 pm

1 stop15h 20m

Seattle/Tacoma Intl

mié. 10/29

12:00 pm-4:00 pm

2 stops45h 00m

$653

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

mié. 7/9

9:25 pm-11:25 am

1 stop22h 00m

Seattle/Tacoma Intl

lun. 7/21

11:30 pm-11:55 am

1 stop28h 25m

$654

LondonSeattle

LCY - SEA

LCYSEA

London City

mié. 10/29

1:30 pm-11:15 pm

2 stops40h 45m

Seattle/Tacoma Intl

sáb. 11/15

3:37 pm-5:05 pm

2 stops17h 28m

$655

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

lun. 8/18

1:10 pm-8:02 pm

1 stop14h 52m

Seattle/Tacoma Intl

jue. 9/11

1:07 pm-12:15 pm

1 stop15h 08m

$656

LondonSeattle

STN - SEA

STNSEA

London Stansted

vie. 8/22

5:05 pm-1:50 pm

3 stops28h 45m

Seattle/Tacoma Intl

sáb. 8/30

4:00 pm-12:20 am

2 stops24h 20m

$660

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/11

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 $391). 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 junio 12, 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 junio 12, 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 junio 12, 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
7,946 reviews

Crew

8.5

Overall

8.0

Boarding

8.2

Comfort

7.9

Food

7.3

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,946 reviews
Delta
8.0
Very good
7,946 reviews

Crew

8.5

Overall

8.0

Boarding

8.2

Comfort

7.9

Food

7.3

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
KLM
7.8
Good
1,358 reviews
Delta
8.0
Very good
7,946 reviews

Crew

8.5

Overall

8.0

Boarding

8.2

Comfort

7.9

Food

7.3

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Finnair
7.6
Good
1,290 reviews
Delta
8.0
Very good
7,946 reviews

Crew

8.5

Overall

8.0

Boarding

8.2

Comfort

7.9

Food

7.3

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Air France
7.5
Good
1,463 reviews
Delta
8.0
Very good
7,946 reviews

Crew

8.5

Overall

8.0

Boarding

8.2

Comfort

7.9

Food

7.3

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
SWISS
7.5
Good
1,623 reviews
Delta
8.0
Very good
7,946 reviews

Crew

8.5

Overall

8.0

Boarding

8.2

Comfort

7.9

Food

7.3

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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 $532. However, be on the lookout for offers from WestJet and Scandinavian Airlines, 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 Aeromexico (97%), KLM (92%) and Air France (92%).

  • 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 $2,306, our data indicates the cheapest price to be $532. The most popular route (London Heathrow - Seattle/Tacoma Intl), is priced around $318.

  • 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 $391). 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 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 junio 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$402Average$792FlexibilityNo cancel feeOn-time76%
British AirwaysCheapest$560Average$763FlexibilityNo cancel feeOn-time70%
IberiaCheapest$575Average$1,001FlexibilityNo cancel feeOn-time77%
Virgin AtlanticCheapest$594Average$941FlexibilityNo cancel feeOn-time72%
American AirlinesCheapest$620Average$889FlexibilityNo cancel feeOn-time71%
DeltaCheapest$632Average$1,018FlexibilityNo cancel feeOn-timeN/A

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