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$271+ Cheap flights from Washington to London (LON)

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 3/11. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — LON
Jan 26 — Feb 21
Sun 1/26
Sun 2/2
1 adult, Economy
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Cheap flight deals from Washington to London

Discover tips and strategies to find the most affordable flight options for your journey from Washington (USWA) to London (LON). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated January 21, 2025.

Round-trip from

$585
(CrystalTravel)

One-way from

$272
(Kiwi.com)

Good round-trip deal

$709 or less

Good one-way deal

$466 or less
From Washington to London (LON)
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One-way flight from Washington to London (LON)
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Price to beat on a round-trip flight from Washington to London (LON).
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Price to beat on a one-way flight from Washington to London (LON).
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Find flight deals from Washington to London

Cheapest flights from Washington to London
Explore the most affordable flight options available from Washington to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 21, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 1/21. 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.
Mon 10/2710:00 amSEA - LHR
1 stop14h 20mIberia
Fri 11/712:10 pmLHR - SEA
1 stop17h 05mIberia
Deal found 1/21$586
This lol.travel deal was found by Cheapflights users on 1/20. 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.
Tue 3/45:45 pmSEA - LHR
Nonstop9h 25mVirgin Atlantic
Tue 3/116:20 amLHR - SEA
1 stop13h 00mVirgin Atlantic
Deal found 1/20$587
This oojo deal was found by Cheapflights users on 1/20. 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.
Mon 9/223:45 pmSEA - LGW
1 stop14h 55mIcelandair
Wed 10/13:40 pmLGW - SEA
1 stop13h 00mIcelandair
Deal found 1/20$591
This oojo deal was found by Cheapflights users on 1/19. 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.
Thu 10/27:00 pmSEA - LHR
1 stop17h 20mIcelandair
Sat 10/119:25 pmLHR - SEA
1 stop31h 15mIcelandair
Deal found 1/19$591
This Mytrip deal was found by Cheapflights users on 1/21. 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.
Tue 2/49:45 amSEA - LGW
1 stop16h 50mMultiple Airlines
Tue 2/1112:00 pmLGW - SEA
1 stop20h 19mMultiple Airlines
Deal found 1/21$598
This Booking.com deal was found by Cheapflights users on 1/20. 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.
Tue 3/410:35 amSEA - LHR
2 stops14h 45mAir Canada
Wed 3/123:00 pmLHR - SEA
2 stops30h 30mAir Canada
Deal found 1/20$608
This Cheapflightsfares deal was found by Cheapflights users on 1/19. 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.
Tue 2/257:00 amSEA - LHR
1 stop15h 20mBritish Airways
Tue 3/49:25 amLHR - SEA
Nonstop9h 55mBritish Airways
Deal found 1/19$612
This Delta deal was found by Cheapflights users on 1/21. 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.
Mon 2/105:45 pmSEA - LHR
Nonstop9h 25mDelta
Thu 2/206:30 amLHR - SEA
1 stop13h 16mDelta
Deal found 1/21$613
This Kiwi.com deal was found by Cheapflights users on 1/20. 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.
Tue 4/16:45 pmSEA - STN
1 stop13h 50mMultiple Airlines
Tue 4/811:15 amSTN - SEA
1 stop13h 44mMultiple Airlines
Deal found 1/20$620
This Kiwi.com deal was found by Cheapflights users on 1/20. 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.
Tue 4/16:45 pmSEA - LTN
1 stop19h 25mMultiple Airlines
Tue 4/810:00 amLTN - SEA
1 stop14h 59mMultiple Airlines
Deal found 1/20$620
This Air Canada deal was found by Cheapflights users on 1/20. 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.
Tue 3/410:35 amSEA - LHR
1 stop15h 35mMultiple Airlines
Wed 3/126:30 amLHR - SEA
2 stops18h 55mMultiple Airlines
Deal found 1/20$629
This Lufthansa deal was found by Cheapflights users on 1/21. 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.
Tue 4/1510:35 amSEA - LHR
1 stop18h 45mLufthansa
Tue 5/66:30 amLHR - SEA
2 stops23h 43mLufthansa
Deal found 1/21$632

Find flights from Washington to London within your budget

Customize your flight search to find flights from Washington to London 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 January 21, 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Fri 3/7

2:35 pm-10:55 am

1 stop12h 20m

London Gatwick

Wed 3/12

11:55 am-6:00 pm

1 stop13h 05m

$584

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Tue 3/4

5:45 pm-11:10 am

Nonstop9h 25m

London Heathrow

Tue 3/11

6:20 am-12:20 pm

1 stop13h 00m

$587

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Tue 3/4

6:50 pm-12:15 pm

Nonstop9h 25m

London Heathrow

Wed 3/12

3:00 pm-5:55 pm

Nonstop9h 55m

$588

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Tue 2/4

9:45 am-10:35 am

1 stop16h 50m

London Gatwick

Tue 2/11

12:00 pm-12:19 am

1 stop20h 19m

$598

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Mon 2/3

10:35 am-9:20 am

2 stops14h 45m

London Heathrow

Tue 2/18

1:25 pm-10:07 pm

2 stops16h 42m

$602

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Sat 3/1

2:35 pm-10:50 am

1 stop12h 15m

London Heathrow

Wed 3/5

12:15 pm-5:00 pm

1 stop12h 45m

$607

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Tue 2/25

7:00 am-6:20 am

1 stop15h 20m

London Heathrow

Tue 3/4

9:25 am-11:20 am

Nonstop9h 55m

$612

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Mon 2/10

5:45 pm-11:10 am

Nonstop9h 25m

London Heathrow

Fri 2/21

6:30 am-11:46 am

1 stop13h 16m

$613

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

Tue 4/1

6:45 pm-4:35 pm

1 stop13h 50m

London Stansted

Tue 4/8

11:15 am-4:59 pm

1 stop13h 44m

$620

SeattleLondon

SEA - LTN

SEALTN

Seattle/Tacoma Intl

Tue 4/1

6:45 pm-10:10 pm

1 stop19h 25m

London Luton

Tue 4/8

10:00 am-4:59 pm

1 stop14h 59m

$620

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/19

Showing 1-10 of 60 results
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Best time to book a flight from Washington to London

Have a flexible travel schedule? Discover the best time to fly to London from Washington 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.

Travel insights for flights from Washington to London

Get recent, data-driven insights about flights from Washington to London including ideal travel times, pricing trends, and more.

What is the cheapest month to book a flight from State of Washington to London?

Currently, November is the cheapest month in which you can book a flight from State of Washington to London (average of $661). Flying from State of Washington to London in June is currently the most expensive (average of $1,137). 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 WA to LON?

Find hourly flight availability from Washington to London. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated January 21, 2025.

When flying from State of Washington to London, 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 State of Washington to London

Explore weekly flight availability from Washington to London. 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 January 21, 2025.

The most flights from USWA to LON are scheduled on a Friday (22 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (6 on average).

Rainfall in London by month

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

In terms of precipitation, rainfall in London ranges from 1.6 - 2.8 inches per month. January is typically the wettest month, when rainfall can reach 2.8 in. July is typically the driest time to visit London when rainfall is around 1.6 in.

Temperature in London by month

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

If weather is an important factor for your trip to London, 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 62.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 39.2 F).

Reviews of airlines servicing London

Get insights into the airlines that provide service to London. 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 London. Reviews last updated January 21, 2025.
Peruse reviews from past customers who have flown with Icelandair, British Airways and Lufthansa from Washington to London to help guide your decision. 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
8,521 reviews

Comfort

8.0

Crew

8.6

Food

7.3

Boarding

8.2

Entertainment

7.9

Overall

8.0

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Delta
8.0
Very good
8,521 reviews
Delta
8.0
Very good
8,521 reviews

Comfort

8.0

Crew

8.6

Food

7.3

Boarding

8.2

Entertainment

7.9

Overall

8.0

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Alaska Airlines
8.0
Very good
9,706 reviews
Delta
8.0
Very good
8,521 reviews

Comfort

8.0

Crew

8.6

Food

7.3

Boarding

8.2

Entertainment

7.9

Overall

8.0

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

KLM
7.8
Good
1,341 reviews
Delta
8.0
Very good
8,521 reviews

Comfort

8.0

Crew

8.6

Food

7.3

Boarding

8.2

Entertainment

7.9

Overall

8.0

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Finnair
7.6
Good
1,286 reviews
Delta
8.0
Very good
8,521 reviews

Comfort

8.0

Crew

8.6

Food

7.3

Boarding

8.2

Entertainment

7.9

Overall

8.0

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Austrian Airlines
7.6
Good
786 reviews
Delta
8.0
Very good
8,521 reviews

Comfort

8.0

Crew

8.6

Food

7.3

Boarding

8.2

Entertainment

7.9

Overall

8.0

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Related info for your journey

Find useful and relevant information for your journey from Washington to London. 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 State of Washington to London one-way?

    One-way options have recently been found by users for as low as $277 on Icelandair. Other airlines that offer cheap prices include WestJet from $280 and Lufthansa from $315 one-way.

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

    The most popular route from State of Washington to London is Seattle/Tacoma Intl - London Heathrow. You may also consider Seattle/Tacoma Intl - London Gatwick or Seattle/Tacoma Intl - London City.

  • What are the most reliable airlines from State of Washington to London?

    No one likes to see their flight delayed. When booking a flight from State of Washington to London consider choosing Singapore Airlines (85%), Aeromexico (85%) or KLM (80%) as they are the most reliable in getting you off to your destination on time.

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

    The cheapest flight price from State of Washington to London is $410. On average you can expect to pay $1,691. The most popular route, (Seattle/Tacoma Intl - London Heathrow), can usually be booked for $452.

  • Can I find deals for flights from Washington to London that include hotel bookings?

    Yes. In addition to deals on Washington to London flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Washington to London?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Washington to London.

  • Can I find deals for business class flights from Washington to London?

    Yes. Cheapflights offers flight deals from Washington to London 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 State of Washington to London?

    Currently, November is the cheapest month in which you can book a flight from State of Washington to London (average of $661). Flying from State of Washington to London in June is currently the most expensive (average of $1,137). 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

Traveling to a place near Washington?

Book flights to Washington if you plan to visit one of these locations
Hayes
Hounslow
Thornton Heath
Harrow
Luton
Wembley
Canterbury
Gatwick
Horley
Milton Keynes
Dover
Watford
Orpington
Croydon
Borehamwood
Bromley
Folkestone
Ilford
Aylesbury
Chelmsford

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Washington to London

See prices for flight routes from nearby airports that may be better suited for you.
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Top 10 airlines flying from Washington to London

Discover the top 10 airlines that operate flights from Washington to London. 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 January 21, 2025.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest$384Average$690FlexibilityNo cancel feeOn-time76%
FinnairCheapest$493Average$762FlexibilityNo cancel feeOn-time76%
IcelandairCheapest$498Average$688FlexibilityNo cancel feeOn-time76%
American AirlinesCheapest$572Average$892FlexibilityNo cancel feeOn-time71%
IberiaCheapest$582Average$751FlexibilityNo cancel feeOn-time77%
Air FranceCheapest$588Average$901FlexibilityNo cancel feeOn-time77%
Aer LingusCheapest$588Average$855FlexibilityNo cancel feeOn-timeN/A
KLMCheapest$597Average$844FlexibilityNo cancel feeOn-time75%
DeltaCheapest$599Average$879FlexibilityNo cancel feeOn-timeN/A
Virgin AtlanticCheapest$601Average$864FlexibilityNo cancel feeOn-time72%
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