Find flights
Deals
When to book
FAQs

Cheap flights from Washington to London from £183

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 5/10. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — LON
15 Jul — 22 Jul1
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 15 June 2026.

Sun 6/919:00
SEA
-
STN
2 stops20h 20m
Multiple Airlines
Sat 12/911:25
STN
-
SEA
2 stops17h 15m
Multiple Airlines
Deal found 11/6£649
Mon 6/719:00
SEA
-
LGW
1 stop11h 40m
Icelandair
Thu 16/715:40
LGW
-
SEA
1 stop13h 00m
Icelandair
Deal found 12/6£649
Tue 11/815:55
SEA
-
LHR
2 stops18h 55m
Scandinavian Airlines
Tue 18/806:40
LHR
-
SEA
1 stop15h 05m
Scandinavian Airlines
Deal found 11/6£649
Thu 20/815:40
SEA
-
LGW
1 stop15h 00m
Icelandair
Sun 30/815:40
LGW
-
SEA
1 stop28h 05m
Icelandair
Deal found 10/6£650
Tue 7/723:25
SEA
-
LHR
1 stop12h 55m
Icelandair
Mon 13/721:25
LHR
-
SEA
1 stop22h 20m
Icelandair
Deal found 12/6£650
Mon 6/719:00
SEA
-
LGW
1 stop11h 40m
Icelandair
Wed 15/715:40
LGW
-
SEA
1 stop13h 00m
Icelandair
Deal found 10/6£651
Mon 7/919:00
SEA
-
LTN
2 stops14h 10m
Multiple Airlines
Wed 16/905:40
LTN
-
SEA
3 stops36h 12m
Multiple Airlines
Deal found 11/6£651
Sun 9/815:55
SEA
-
LHR
2 stops18h 55m
Scandinavian Airlines
Sat 22/813:55
LHR
-
SEA
2 stops31h 50m
Scandinavian Airlines
Deal found 11/6£651
Sun 19/715:40
SEA
-
STN
2 stops23h 40m
Multiple Airlines
Thu 23/722:05
STN
-
SEA
3 stops30h 55m
Multiple Airlines
Deal found 12/6£651
Mon 6/718:10
SEA
-
LGW
1 stop16h 40m
Condor
Wed 22/710:20
LGW
-
SEA
1 stop13h 20m
Condor
Deal found 10/6£651
Mon 20/710:45
SEA
-
LHR
2 stops21h 40m
Air Canada
Wed 22/709:30
LHR
-
SEA
2 stops36h 52m
Air Canada
Deal found 11/6£651
Thu 1/1019:15
SEA
-
STN
1 stop30h 40m
Turkish Airlines
Tue 6/1017:35
STN
-
SEA
1 stop31h 45m
Turkish Airlines
Deal found 13/6£652

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 15 June 2026.

Round-trip from

£649

One-way from

£183

Popular in

June

Cheapest in

January

Average price

£871

Good round-trip deal

£763 or less

Good one-way deal

£464 or less
6/9-12/9
  • 6/9-12/9
  • 4 total stops
  • 37h 35m total
  • Washington to London
Search Deals
5/10
  • 5/10
  • 2 total stops
  • 19h 20m total
  • Washington to London
Search Deals
Highest demand for flights based on searches. 22% potential increase in price (£126 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£20 potential savings vs. average return price).
Search Deals
Average for round-trip flights in June 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 15 June 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 - LGW

SEALGW

Seattle/Tacoma Intl

Tue 6/10

07:00-08:25

2 stops17h 25m

London Gatwick

Tue 20/10

09:25-22:56

2 stops21h 31m

£652

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Sun 20/9

17:45-18:30

1 stop16h 45m

London City

Mon 28/9

19:00-11:47

1 stop24h 47m

£656

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Mon 14/9

21:50-15:35

Nonstop9h 45m

London Heathrow

Thu 24/9

11:40-14:00

Nonstop10h 20m

£656

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Wed 21/10

13:30-10:00

1 stop12h 30m

London Heathrow

Fri 23/10

17:45-20:14

Nonstop10h 29m

£659

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Tue 24/11

19:05-16:30

1 stop37h 25m

London Gatwick

Tue 8/12

10:05-17:10

1 stop39h 05m

£660

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Sun 13/9

07:00-12:35

2 stops21h 35m

London City

Tue 22/9

09:15-18:32

2 stops17h 17m

£660

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Tue 25/8

18:05-18:50

1 stop16h 45m

London Gatwick

Wed 9/9

10:20-15:40

1 stop13h 20m

£663

SeattleLondon

SEA - LTN

SEALTN

Seattle/Tacoma Intl

Tue 25/8

19:00-22:25

2 stops19h 25m

London Luton

Sun 30/8

19:00-11:45

2 stops24h 45m

£672

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Wed 12/8

08:40-10:25

2 stops17h 45m

London Heathrow

Wed 19/8

09:00-16:59

1 stop15h 59m

£675

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Sun 13/9

13:30-09:25

1 stop11h 55m

London Gatwick

Sat 19/9

10:25-17:43

1 stop15h 18m

£680

Flights are sorted by cheapest return flights first.

Deals found on 9/6

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 £239). Flying from State of Washington to London in November is currently the most expensive (average of £1,940). 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 15 June 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 15 June 2026.

The most flights from USWA to LON are scheduled on a Tuesday (23 on average). You will have fewer flight options on Thursday, 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?

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 82 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?

    SWISS, Virgin Atlantic, and Delta can get you from State of Washington to London in just under 11h 40m. Your travel time can differ by up to 5h 45m. The distance from State of Washington to London is about 4794 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 £127. Virgin Atlantic flights start at £292 while deals on British Airways start at £306 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 (93%), Air France (93%), Delta (93%).

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

    On average you can expect to pay £637 for a flight from State of Washington to London. The cheapest flight overall is £265 while the most popular route, (Seattle/Tacoma Intl - London Heathrow) is currently priced at £466.

  • 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 £239). Flying from State of Washington to London in November is currently the most expensive (average of £1,940). 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
Wembley
Luton
Gatwick
Croydon
Slough
Ilford
Hayes
Brentford
Colchester
Kingston upon Thames
Eastbourne
Watford
Guildford
Romford
Ipswich
Borehamwood
Folkestone
Southall

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
Newark to Gatwick flights
John F Kennedy Intl to London City flights
John F Kennedy Intl to Stansted flights
LaGuardia to Heathrow flights
Boston to Heathrow flights
Dulles Intl to Heathrow flights
Los Angeles to Heathrow flights
LaGuardia to Gatwick flights
Baltimore to Heathrow flights
San Francisco to Heathrow flights
Seattle to Heathrow flights
Boston to Gatwick flights
O'Hare Intl to Heathrow flights
Dallas/Fort Worth to Heathrow flights
Newark to London City flights
Newark to Luton flights
Newark to Stansted flights
Orlando to Heathrow flights
Atlanta to Heathrow flights
Hobby to Heathrow flights
Boston to London City flights
Miami to Heathrow flights
LaGuardia to Stansted flights
Dulles Intl to Gatwick flights
Reagan-National to Heathrow flights
Boston to Stansted flights
Los Angeles to Gatwick flights
John F Kennedy Intl to Edinburgh flights
Denver to Heathrow flights
Philadelphia to Heathrow flights
Newark to Edinburgh flights
Los Angeles to Stansted flights
Dulles Intl to London City flights
George Bush Intcntl to Heathrow flights
Baltimore to Gatwick flights
Boston to Edinburgh flights
Los Angeles to London City flights
Reagan-National to Gatwick flights
San Francisco to Gatwick flights
Seattle to Gatwick flights
Sky Harbor Intl to Heathrow flights
O'Hare Intl to Gatwick flights
Charlotte to Heathrow flights

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 15 June 2026.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest£353Average£616FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Virgin AtlanticCheapest£367Average£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.

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.