Find flights
Deals
When to book
FAQs

Cheap flights from Washington to London from £179

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 15/10. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — LON
13 Sep — 20 Sep1
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 14 August 2026.

Fri 25/915:55 -
1 stop15h 30m
Fri 2/1006:20 -
1 stop15h 25m
Deal found 11/8£476
Sat 3/1023:08 -
2 stops32h 52m
Tue 6/1006:40 -
2 stops15h 05m
Deal found 10/8£477
Sun 27/915:55 -
1 stop15h 45m
Sun 4/1007:05 -
1 stop14h 40m
Deal found 13/8£480
Tue 24/1108:31 -
2 stops15h 34m
Mon 30/1112:15 -
1 stop13h 40m
Deal found 10/8£480
Sun 27/915:55 -
1 stop17h 20m
Sun 11/1007:05 -
1 stop14h 40m
Deal found 10/8£480
Sun 27/915:55 -
1 stop17h 20m
Fri 2/1006:20 -
1 stop15h 25m
Deal found 12/8£483
Mon 21/908:00 -
3 stops27h 15m
Mon 5/1020:45 -
3 stops28h 14m
Deal found 11/8£483
Wed 9/905:50 -
3 stops29h 25m
Tue 15/919:55 -
2 stops29h 04m
Deal found 11/8£483
Mon 21/908:00 -
3 stops29h 20m
Mon 5/1021:05 -
2 stops27h 54m
Deal found 11/8£484
Thu 15/1008:00 -
2 stops27h 15m
Thu 22/1022:05 -
3 stops32h 37m
Deal found 12/8£485
Mon 24/808:00 -
2 stops30h 25m
Sat 5/920:55 -
2 stops28h 04m
Deal found 12/8£488
Fri 2/1015:55 -
1 stop15h 30m
Sun 4/1007:05 -
1 stop14h 40m
Deal found 13/8£490

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 14 August 2026.

Round-trip from

£476

One-way from

£179

Popular in

June

Cheapest in

January

Average price

£627

Good round-trip deal

£704 or less

Good one-way deal

£276 or less
25/9-2/10
  • 25/9-2/10
  • 2 total stops
  • 30h 55m total
  • Washington to London
Search Deals
15/10
  • 15/10
  • 2 total stops
  • 25h 00m total
  • Washington to London
Search Deals
Highest demand for flights based on searches. 20% potential increase in price (£119 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£18 potential savings vs. average return price).
Search Deals
Average for round-trip flights in August 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 14 August 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 Seattle/Tacoma Intl - LHR London Heathrow

SEALHR

Seattle/Tacoma Intl

Tue 22/9

15:55-16:00

1 stop16h 05m

London Heathrow

Thu 1/10

06:40-13:45

2 stops39h 05m

£545

SeattleLondon

SEA Seattle/Tacoma Intl - LHR London Heathrow

SEALHR

Seattle/Tacoma Intl

Wed 14/10

15:40-20:20

1 stop20h 40m

London Heathrow

Thu 22/10

21:25-20:40

1 stop31h 15m

£551

SeattleLondon

SEA Seattle/Tacoma Intl - LHR London Heathrow

SEALHR

Seattle/Tacoma Intl

Thu 12/11

14:35-19:30

1 stop20h 55m

London Heathrow

Sat 21/11

12:15-17:00

1 stop12h 45m

£586

SeattleLondon

SEA Seattle/Tacoma Intl - LTN London Luton

SEALTN

Seattle/Tacoma Intl

Wed 4/11

14:35-13:00

1 stop14h 25m

London Luton

Wed 18/11

08:00-17:00

1 stop17h 00m

£594

SeattleLondon

SEA Seattle/Tacoma Intl - LTN London Luton

SEALTN

Seattle/Tacoma Intl

Wed 18/11

14:35-13:00

1 stop14h 25m

London Luton

Wed 25/11

08:00-17:00

1 stop17h 00m

£597

SeattleLondon

SEA Seattle/Tacoma Intl - LTN London Luton

SEALTN

Seattle/Tacoma Intl

Thu 8/10

19:00-18:25

2 stops15h 25m

London Luton

Sun 18/10

21:50-16:10

2 stops26h 20m

£640

SeattleLondon

SEA Seattle/Tacoma Intl - LCY London City

SEALCY

Seattle/Tacoma Intl

Wed 11/11

14:35-16:35

1 stop18h 00m

London City

Wed 18/11

20:05-11:47

1 stop23h 42m

£654

SpokaneLondon

GEG Spokane - LHR London Heathrow

GEGLHR

Spokane

Wed 18/11

07:00-08:35

2 stops17h 35m

London Heathrow

Wed 25/11

08:40-19:55

2 stops19h 15m

£654

SpokaneLondon

GEG Spokane - LHR London Heathrow

GEGLHR

Spokane

Mon 16/11

11:22-12:00

1 stop16h 38m

London Heathrow

Wed 18/11

13:00-12:29

2 stops31h 29m

£657

SeattleLondon

SEA Seattle/Tacoma Intl - LHR London Heathrow

SEALHR

Seattle/Tacoma Intl

Sat 14/11

22:50-20:10

1 stop13h 20m

London Heathrow

Thu 19/11

12:20-14:50

Nonstop10h 30m

£657

Flights are sorted by cheapest return flights first.

Deals found on 13/8

Showing 1-10 of 60 resultsSorted by cheapest first
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, January is the cheapest month in which you can book a flight from State of Washington to London (average of £488). Flying from State of Washington to London in June is currently the most expensive (average of £901). 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 14 August 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 14 August 2026.

The most flights from USWA to LON are scheduled on a Wednesday (25 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (19 on average).

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

Airfare is below average for this route at the moment.
State of Washington to London flights typically cost between £520 and £729 in September.
The cheapest return price found within the last 5 days was £476 on Multiple Airlines (25 Sept–2 Oct).

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.

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?

    Scandinavian Airlines, Icelandair, and Virgin Atlantic can get you from State of Washington to London in just under 16h 05m. Your travel time can differ by up to 4h 35m. 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 £126. Virgin Atlantic flights start at £217 while deals on British Airways start at £241 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: SAUDIA (100%), KLM (84%), Air France (84%).

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

    On average you can expect to pay £527 for a flight from State of Washington to London. The cheapest flight overall is £241 while the most popular route, (Seattle/Tacoma Intl - London Heathrow) is currently priced at £415.

  • 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 £488). Flying from State of Washington to London in June is currently the most expensive (average of £901). 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
Hounslow
Milton Keynes
Luton
Gatwick
Wembley
Ilford
Slough
Hayes
Croydon
Colchester
Brentford
Eastbourne
Watford
Southend-on-Sea
Enfield
Kingston upon Thames
Southall
Dover
Romford
Borehamwood

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
Dulles Intl to Heathrow flights
LaGuardia to Heathrow flights
Newark to Gatwick flights
John F Kennedy Intl to Stansted flights
John F Kennedy Intl to London City flights
John F Kennedy Intl to Gatwick flights
Boston to Heathrow flights
Baltimore to Heathrow flights
Los Angeles to Heathrow flights
LaGuardia to Gatwick flights
San Francisco to Heathrow flights
O'Hare Intl to Heathrow flights
Dallas/Fort Worth to Heathrow flights
Seattle to Heathrow flights
Atlanta to Heathrow flights
Newark to London City flights
Orlando to Heathrow flights
Dulles Intl to Gatwick flights
Newark to Stansted flights
Reagan-National to Heathrow flights
Miami to Heathrow flights
Newark to Luton flights
Dulles Intl to London City flights
Hobby to Heathrow flights
Boston to Gatwick flights
Boston to London City flights
Los Angeles to Gatwick flights
Philadelphia to Heathrow flights
Denver to Heathrow flights
Newark to Edinburgh flights
Boston to Stansted flights
John F Kennedy Intl to Edinburgh flights
Los Angeles to Stansted flights
Baltimore to Gatwick flights
Los Angeles to London City flights
Reagan-National to Gatwick flights
George Bush Intcntl to Heathrow flights
Raleigh to Heathrow flights
O'Hare Intl to Gatwick flights
San Francisco to Gatwick flights
Sky Harbor Intl to Heathrow flights
Detroit to Heathrow flights
O'Hare Intl to Stansted flights
San Francisco to London City flights
O'Hare Intl to London City flights
Charlotte 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 14 August 2026.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest£458Average£678FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Alaska AirlinesCheapest£489Average£728FlexibilityNo cancel feeOn-time75%
Search Alaska Airlines flights
Virgin AtlanticCheapest£496Average£621FlexibilityNo 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.