Find flights
Deals
When to book
FAQs

Cheap flights from Washington to London from £201

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 24/2. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — LON
30 11월 — 7 12월1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Washington to London

Keep the following information in mind while searching for Washington to London flight deals. Data was last updated 31 10월 2025.

Round-trip from

£393

One-way from

£201

Popular in

June

Cheapest in

October

Average price

£503

Good round-trip deal

£495 or less

Good one-way deal

£466 or less
Icelandair
  • Icelandair
  • 15/3-25/3
  • 2 total stops
  • 49h 20m total
  • Washington to London
Search Deals
24/2
  • 24/2
  • 2 total stops
  • 36h 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 October 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

Find 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 31 10월 2025.

화 4/1114:35SEA - LHR
1 stop20h 55mIcelandair
화 11/1120:35LHR - SEA
1 stop28h 25mIcelandair
Deal found 28/10£394
수 12/1114:35SEA - LGW
2 stops20h 20mMultiple Airlines
수 19/1108:50LGW - SEA
2 stops16h 10mMultiple Airlines
Deal found 29/10£395
월 24/1114:35SEA - LHR
1 stop12h 15mIcelandair
일 7/1212:15LHR - SEA
1 stop12h 45mIcelandair
Deal found 29/10£395
월 24/1114:35SEA - LHR
1 stop12h 15mIcelandair
토 6/1220:35LHR - SEA
1 stop28h 25mIcelandair
Deal found 29/10£396
수 12/1114:35SEA - LTN
2 stops18h 30mMultiple Airlines
수 19/1106:50LTN - SEA
2 stops18h 10mMultiple Airlines
Deal found 29/10£397
목 13/1114:35SEA - STN
2 stops24h 45mMultiple Airlines
화 18/1106:30STN - SEA
2 stops18h 30mMultiple Airlines
Deal found 29/10£401
토 6/1214:35SEA - STN
2 stops21h 30mMultiple Airlines
일 14/1206:10STN - SEA
2 stops18h 50mMultiple Airlines
Deal found 30/10£402
월 3/1120:05SEA - STN
1 stop14h 15mMultiple Airlines
수 5/1106:30STN - SEA
1 stop15h 40mMultiple Airlines
Deal found 30/10£407
목 13/1114:35SEA - STN
2 stops16h 15mMultiple Airlines
목 27/1106:30STN - SEA
2 stops18h 30mMultiple Airlines
Deal found 29/10£408
월 24/1114:35SEA - LGW
1 stop12h 20mIcelandair
월 8/1211:55LGW - SEA
1 stop13h 05mIcelandair
Deal found 29/10£410
목 13/1114:35SEA - LGW
2 stops15h 50mMultiple Airlines
화 18/1108:50LGW - SEA
2 stops16h 10mMultiple Airlines
Deal found 29/10£411
토 8/1114:45PDX - LHR
1 stop12h 05mIcelandair
목 13/1120:35LHR - PDX
1 stop28h 25mIcelandair
Deal found 30/10£412

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 31 10월 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 - LHR

SEALHR

Seattle/Tacoma Intl

목 27/11

14:35-10:50

1 stop12h 15m

London Heathrow

목 4/12

12:15-17:00

1 stop12h 45m

£395

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

수 26/11

14:35-10:50

1 stop12h 15m

London Heathrow

목 4/12

12:15-17:00

1 stop12h 45m

£395

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

월 24/11

14:35-10:55

1 stop12h 20m

London Gatwick

월 8/12

11:55-17:00

1 stop13h 05m

£410

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

수 26/11

14:35-10:55

1 stop12h 20m

London Gatwick

월 8/12

11:55-17:00

1 stop13h 05m

£410

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

목 13/11

14:35-18:20

2 stops19h 45m

London Stansted

화 18/11

08:30-17:00

2 stops16h 30m

£423

SeattleLondon

SEA - LTN

SEALTN

Seattle/Tacoma Intl

목 13/11

14:35-13:20

2 stops14h 45m

London Luton

화 18/11

09:00-17:00

2 stops16h 00m

£423

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

월 17/11

10:05-18:20

3 stops24h 15m

London Stansted

화 25/11

21:45-19:16

3 stops29h 31m

£427

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

목 13/11

14:35-19:45

2 stops21h 10m

London Gatwick

화 18/11

08:50-17:00

2 stops16h 10m

£436

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

화 2/12

19:20-12:50

Nonstop9h 30m

London Heathrow

목 11/12

06:20-11:25

1 stop13h 05m

£438

PortlandLondon

PDX - LHR

PDXLHR

Portland

수 10/12

07:15-10:30

1 stop19h 15m

London Heathrow

수 24/12

06:30-11:25

1 stop12h 55m

£442

Flights are sorted by cheapest return flights first.

Deals found on 29/10

Showing 1-10 of 60 results
1
2
3
...
6

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, April 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 £601). 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 31 10월 2025.

Unlike in the morning, when flights are generally more expensive, you can save up to 22% on flights from State of Washington to London by exploring options for tickets in the afternoon.

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, Delta, and Finnair can get you from State of Washington to London in just under 9h 30m. Your travel time can differ by up to 2h 45m. 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 £257. Aer Lingus flights start at £285 while deals on Virgin Atlantic start at £291 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: KLM (86%), Air France (86%), Delta (86%).

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

    On average you can expect to pay £529 for a flight from State of Washington to London. The cheapest flight overall is £397 while the most popular route, (Seattle/Tacoma Intl - London Heathrow) is currently priced at £361.

  • 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, April 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 £601). 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

Travelling to a place near London?

Book flights to London if you plan to visit one of these locations
Milton Keynes
Croydon
Slough
Gatwick
Hounslow
Luton
Ilford
Wembley
Deal
Hayes
Colchester
Watford
Winchester
Chichester
Crawley
Romford
Brentford
Ipswich
Bedford
Eastbourne

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Washington to London

See prices for flight routes from nearby airports that may be better suited for you.
John F Kennedy Intl to Heathrow flights
Newark to Heathrow flights
John F Kennedy Intl to Gatwick flights
John F Kennedy Intl to London City flights
Newark to Gatwick flights
LaGuardia to Heathrow flights
Boston to Heathrow flights
Dulles Intl to Heathrow flights
Los Angeles to Heathrow flights
LaGuardia to Gatwick flights
John F Kennedy Intl to Stansted flights
Newark to London City flights
San Francisco to Heathrow flights
O'Hare Intl to Heathrow flights
Dallas/Fort Worth to Heathrow flights
Newark to Luton flights
Newark to Stansted flights
Baltimore to Heathrow flights
Seattle to Heathrow flights
Atlanta to Heathrow flights
Miami to Heathrow flights
Dulles Intl to Gatwick flights
Boston to Gatwick flights
Los Angeles to Gatwick flights
Boston to London City flights
Dulles Intl to London City flights
Orlando to Heathrow flights
Hobby to Heathrow flights
Reagan-National to Heathrow flights
Los Angeles to London City flights
San Francisco to Gatwick flights
Philadelphia to Heathrow flights
Baltimore to Gatwick flights
Boston to Stansted flights
Denver to Heathrow flights
Newark to Edinburgh flights
San Francisco to London City flights
Reagan-National to Gatwick flights
George Bush Intcntl to Heathrow flights
O'Hare Intl to Gatwick flights
Boston to Luton flights
Dallas/Fort Worth to Gatwick flights
O'Hare Intl to London City flights
Minneapolis to Heathrow flights
Seattle to Gatwick flights
Los Angeles to Stansted flights
Tampa to Heathrow flights

Top 3 airlines flying from Washington to London

Discover the top 3 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 31 10월 2025.
AirlineCheapestAverageFlexibilityOn-time
Aer LingusCheapest£355Average£521FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
British AirwaysCheapest£360Average£605FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Virgin AtlanticCheapest£375Average£626FlexibilityNo 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.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.