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Cheap flights from Washington to London from £199

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 6/5. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — LON
24 May — 31 May1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Washington to London

Enter your travel dates to find the best prices.

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 24 April 2026.

Thu 4/619:00
SEA
-
STN
2 stops19h 55m
Multiple Airlines
Thu 11/607:00
STN
-
SEA
2 stops18h 55m
Multiple Airlines
Deal found 20/4£505
Mon 4/519:00
SEA
-
LGW
3 stops29h 40m
Multiple Airlines
Mon 11/518:05
LGW
-
SEA
2 stops34h 35m
Multiple Airlines
Deal found 20/4£508
Mon 4/515:40
SEA
-
LGW
2 stops20h 30m
Multiple Airlines
Tue 19/509:40
LGW
-
SEA
2 stops17h 05m
Multiple Airlines
Deal found 20/4£514
Mon 4/515:40
SEA
-
LTN
3 stops25h 30m
Multiple Airlines
Tue 19/509:40
LTN
-
SEA
2 stops17h 05m
Multiple Airlines
Deal found 20/4£516
Tue 5/515:40
SEA
-
LGW
2 stops17h 45m
Multiple Airlines
Tue 19/509:40
LGW
-
SEA
2 stops17h 05m
Multiple Airlines
Deal found 21/4£519
Sat 2/515:40
SEA
-
STN
2 stops24h 25m
Multiple Airlines
Tue 12/506:30
STN
-
SEA
3 stops35h 10m
Multiple Airlines
Deal found 21/4£520
Sat 26/915:55
SEA
-
LHR
1 stop33h 25m
Scandinavian Airlines
Tue 29/906:40
LHR
-
SEA
2 stops15h 05m
Scandinavian Airlines
Deal found 20/4£521
Mon 27/415:40
SEA
-
STN
2 stops19h 10m
Multiple Airlines
Fri 1/506:20
STN
-
SEA
2 stops19h 35m
Multiple Airlines
Deal found 20/4£522
Mon 27/415:40
SEA
-
LGW
2 stops16h 40m
Multiple Airlines
Mon 4/518:05
LGW
-
SEA
2 stops34h 35m
Multiple Airlines
Deal found 20/4£522
Fri 8/519:00
SEA
-
LGW
2 stops15h 00m
Multiple Airlines
Tue 12/509:20
LGW
-
SEA
2 stops19h 20m
Multiple Airlines
Deal found 20/4£523
Tue 5/515:40
SEA
-
LTN
3 stops24h 05m
Multiple Airlines
Tue 19/509:40
LTN
-
SEA
2 stops17h 05m
Multiple Airlines
Deal found 21/4£523
Wed 22/417:40
SEA
-
LGW
1 stop17h 05m
Condor
Wed 6/510:20
LGW
-
SEA
1 stop13h 20m
Condor
Deal found 21/4£524

Find flight deals from Washington to London

Keep the following information in mind while searching for Washington to London flight deals. Data was last updated 24 April 2026.

Round-trip from

£505

One-way from

£199

Popular in

June

Cheapest in

January

Average price

£526

Good round-trip deal

£686 or less

Good one-way deal

£407 or less
4/6-11/6
  • 4/6-11/6
  • 4 total stops
  • 38h 50m total
  • Washington to London
Search Deals
6/5
  • 6/5
  • 3 total stops
  • 29h 55m total
  • Washington to London
Search Deals
Highest demand for flights based on searches. 17% potential increase in price (£91 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£15 potential savings vs. average return price).
Search Deals
Average for round-trip flights in April 2026
Search Deals
Price to beat on a round-trip flight from Washington to London (LON).
Search Deals
Price to beat on a one-way flight from Washington to London (LON).
Search Deals

Cheapflights Fare Finder

 
Customise 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 858,174 searches. Data last updated 24 April 2026.
Use the filters below to find and compare flights from Washington to London that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

SeattleLondon

SEA - LTN

SEALTN

Seattle/Tacoma Intl

Mon 4/5

15:40-01:10

3 stops25h 30m

London Luton

Tue 19/5

09:40-18:45

2 stops17h 05m

£516

SeattleLondon

SEA - LTN

SEALTN

Seattle/Tacoma Intl

Tue 5/5

15:40-22:10

3 stops22h 30m

London Luton

Mon 11/5

06:05-22:40

3 stops24h 35m

£601

SeattleLondon

SEA - LTN

SEALTN

Seattle/Tacoma Intl

Thu 7/5

18:05-00:50

2 stops22h 45m

London Luton

Sun 10/5

18:15-16:10

2 stops29h 55m

£638

PortlandLondon

PDX - LHR

PDXLHR

Portland

Wed 9/9

09:40-12:10

1 stop18h 30m

London Heathrow

Wed 23/9

06:30-11:10

1 stop12h 40m

£652

PortlandLondon

PDX - LHR

PDXLHR

Portland

Fri 18/9

13:38-18:30

3 stops20h 52m

London Heathrow

Mon 28/9

19:50-16:33

3 stops28h 43m

£662

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Tue 8/9

18:20-12:10

Nonstop9h 50m

London Heathrow

Tue 15/9

06:30-11:47

1 stop13h 17m

£669

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Tue 15/9

18:20-12:10

Nonstop9h 50m

London Heathrow

Wed 23/9

06:30-11:47

1 stop13h 17m

£669

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Tue 1/9

18:20-12:10

Nonstop9h 50m

London Heathrow

Tue 15/9

06:30-11:47

1 stop13h 17m

£669

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Mon 14/9

11:10-17:40

2 stops22h 30m

London Heathrow

Mon 28/9

19:50-13:45

2 stops25h 55m

£684

PortlandLondon

PDX - LHR

PDXLHR

Portland

Mon 31/8

13:25-13:05

1 stop15h 40m

London Heathrow

Wed 9/9

19:15-11:10

1 stop23h 55m

£688

Flights are sorted by cheapest return flights first.

Deals found on 22/4

Showing 1-10 of 60 resultsSorted by cheapest first
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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 return 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 Washington to London

How far ahead should I book a flight from State of Washington to London?

The best time to book flights from State of Washington to London is 64 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

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

Currently, January is the cheapest month in which you can book a flight from State of Washington to London (average of £237). Flying from State of Washington to London in December is currently the most expensive (average of £1,230). 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 24 April 2026.

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 24 April 2026.

The most flights from USWA to LON are scheduled on a Tuesday (22 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (21 on average).

How much does it cost for a return flight from State of Washington to London?

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.

  • How long is the flight from State of Washington to London?

    Delta, Scandinavian Airlines, and KLM can get you from State of Washington to London in just under 9h 50m. Your travel time can differ by up to 11h 02m. The distance from State of Washington to London is about 4783 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

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

    To fly one-way, consider booking your trip with Icelandair, which is currently one of the cheapest options available, starting at £160. Virgin Atlantic flights start at £292 while deals on British Airways start at £296 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 Stansted.

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

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from State of Washington to London on time: KLM (95%), Delta (94%), Virgin Atlantic (94%).

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

    On average you can expect to pay £922 for a flight from State of Washington to London. The cheapest flight overall is £313 while the most popular route, (Seattle/Tacoma Intl - London Heathrow) is currently priced at £513.

  • 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 holiday 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, January is the cheapest month in which you can book a flight from State of Washington to London (average of £237). Flying from State of Washington to London in December is currently the most expensive (average of £1,230). 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 Washington to London

See prices for flight routes from nearby airports that may be better suited for you.
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Top 2 airlines flying from Washington to London

Discover the top 2 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 858,174 searches. Data last updated 24 April 2026.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest£351Average£517FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Virgin AtlanticCheapest£366Average£580FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Washington to London?

When you search for this flight from Washington to London, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

Why should you use Cheapflights to find cheap flight tickets from Washington to London?

Millions of users choose and trust Cheapflights to book the best flight deals from Washington to London for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

Can Cheapflights find flights from Washington to London with no change fees?

Yes! Cheapflights helps users easily find flights from Washington to London with no change fees.

Can Cheapflights notify me if prices for flights from Washington to London become cheaper?

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to London from Washington today and book when prices fit your budget.

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