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Cheap flights from Washington to London from £211

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 23/3. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — LON
22 Jan — 29 Jan1
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 23 December 2025.

Mon 29/1214:35SEA - LHR
1 stop20h 55mIcelandair
Wed 14/112:15LHR - SEA
1 stop12h 45mIcelandair
Deal found 23/12£471
Tue 30/1214:35SEA - LHR
1 stop12h 15mIcelandair
Thu 22/112:15LHR - SEA
1 stop12h 45mIcelandair
Deal found 21/12£474
Mon 29/1214:35SEA - LHR
1 stop20h 55mIcelandair
Mon 19/120:35LHR - SEA
1 stop28h 25mIcelandair
Deal found 21/12£475
Tue 30/1214:35SEA - LHR
1 stop12h 15mIcelandair
Mon 19/120:35LHR - SEA
1 stop28h 25mIcelandair
Deal found 21/12£476
Mon 29/1214:35SEA - LHR
1 stop20h 55mIcelandair
Mon 12/120:35LHR - SEA
1 stop28h 25mIcelandair
Deal found 22/12£490
Mon 29/1206:50PDX - LHR
1 stop22h 00mDelta
Fri 23/106:30LHR - PDX
1 stop12h 55mDelta
Deal found 21/12£558
Mon 29/1207:30PDX - LHR
1 stop20h 30mLufthansa
Fri 23/106:35LHR - PDX
2 stops19h 55mLufthansa
Deal found 21/12£561
Tue 30/1205:30PDX - LHR
2 stops17h 35mDelta
Tue 20/108:40LHR - PDX
1 stop34h 45mDelta
Deal found 21/12£562
Mon 29/1209:00PDX - LHR
1 stop16h 40mUnited Airlines
Thu 22/106:35LHR - PDX
2 stops20h 20mUnited Airlines
Deal found 21/12£565
Tue 30/1219:00PDX - LHR
2 stops30h 20mAir Canada
Wed 21/114:30LHR - PDX
2 stops30h 03mAir Canada
Deal found 21/12£566
Sun 28/1219:30PDX - LHR
1 stop31h 00mDelta
Thu 22/108:40LHR - PDX
1 stop34h 45mDelta
Deal found 21/12£567
Tue 30/1207:10PDX - LHR
1 stop14h 45mLufthansa
Sun 8/208:45LHR - PDX
2 stops23h 54mLufthansa
Deal found 21/12£568

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 23 December 2025.

Round-trip from

£428

One-way from

£211

Popular in

June

Cheapest in

November

Average price

£734

Good round-trip deal

£587 or less

Good one-way deal

£287 or less
Icelandair
  • Icelandair
  • 20/4-7/5
  • 2 total stops
  • 25h 05m total
  • Washington to London
Search Deals
23/3
  • 23/3
  • 2 total stops
  • 23h 20m total
  • Washington to London
Search Deals
Highest demand for flights based on searches. 15% potential increase in price (£77 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£13 potential savings vs. average return price).
Search Deals
Average for round-trip flights in December 2025
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 23 December 2025.
Use the filters below to find and compare flights from Washington to London that are best for you.

Fly from

Washington

Fly to

London

Route

Depart

Return

Price

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Sun 15/2

14:35-10:55

1 stop12h 20m

London Gatwick

Thu 19/2

11:55-17:00

1 stop13h 05m

£430

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Tue 17/2

14:35-10:55

1 stop12h 20m

London Gatwick

Mon 23/2

11:55-17:00

1 stop13h 05m

£430

SeattleLondon

SEA - LTN

SEALTN

Seattle/Tacoma Intl

Tue 10/2

14:35-20:05

2 stops21h 30m

London Luton

Tue 17/2

09:00-17:00

2 stops16h 00m

£434

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Thu 16/4

19:00-14:40

1 stop11h 40m

London Gatwick

Sun 3/5

13:00-17:55

1 stop12h 55m

£447

SeattleLondon

SEA - LTN

SEALTN

Seattle/Tacoma Intl

Sat 17/1

14:00-22:55

2 stops24h 55m

London Luton

Fri 30/1

20:50-12:10

2 stops23h 20m

£449

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Thu 26/2

18:25-11:55

Nonstop9h 30m

London Heathrow

Mon 2/3

06:30-11:35

1 stop13h 05m

£458

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Wed 18/2

16:55-10:30

Nonstop9h 35m

London Heathrow

Fri 27/2

06:30-11:40

1 stop13h 10m

£458

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Tue 20/1

18:25-11:55

Nonstop9h 30m

London Heathrow

Tue 27/1

06:30-11:50

1 stop13h 20m

£458

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Mon 2/3

16:45-10:30

Nonstop9h 45m

London Heathrow

Fri 13/3

06:30-12:35

1 stop13h 05m

£458

SeattleLondon

SEA - LTN

SEALTN

Seattle/Tacoma Intl

Sun 1/3

15:10-20:10

2 stops21h 00m

London Luton

Mon 9/3

15:20-19:16

3 stops34h 56m

£459

Flights are sorted by cheapest return flights first.

Deals found on 20/12

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 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

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

Currently, May is the cheapest month in which you can book a flight from State of Washington to London (average of £368). Flying from State of Washington to London in June is currently the most expensive (average of £588). 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 23 December 2025.

Unlike in the morning, when flights are generally more expensive, you can save up to 21% on flights from State of Washington to London by exploring options for tickets in the afternoon.

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 23 December 2025.

The most flights from USWA to LON are scheduled on a Tuesday (21 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (11 on average).

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?

    Icelandair, KLM, and Delta can get you from State of Washington to London in just under 9h 30m. Your travel time can differ by up to 2h 50m. 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 £163. Virgin Atlantic flights start at £292 while deals on British Airways start at £293 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?

    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: Air France (81%), KLM (81%), Delta (80%).

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

    On average you can expect to pay £624 for a flight from State of Washington to London. The cheapest flight overall is £238 while the most popular route, (Seattle/Tacoma Intl - London Heathrow) is currently priced at £371.

  • 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, May is the cheapest month in which you can book a flight from State of Washington to London (average of £368). Flying from State of Washington to London in June is currently the most expensive (average of £588). 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

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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 23 December 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest£353Average£519FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Virgin AtlanticCheapest£368Average£588FlexibilityNo 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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