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 16/5. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — LON
21 Feb — 28 Feb1
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 22 January 2026.

Wed 6/515:40
SEA
-
LGW
1 stop15h 00m
Icelandair
Sun 10/515:40
LGW
-
SEA
1 stop13h 00m
Icelandair
Deal found 21/1£408
Wed 16/915:40
SEA
-
LHR
1 stop20h 40m
Icelandair
Wed 30/921:25
LHR
-
SEA
1 stop28h 30m
Icelandair
Deal found 21/1£408
Fri 1/515:40
SEA
-
LGW
1 stop15h 00m
Icelandair
Sun 3/513:00
LGW
-
SEA
1 stop12h 55m
Icelandair
Deal found 20/1£409
Wed 25/205:45
SEA
-
LTN
3 stops29h 40m
Multiple Airlines
Sat 28/220:50
LTN
-
SEA
2 stops24h 30m
Multiple Airlines
Deal found 22/1£409
Wed 11/215:40
SEA
-
LHR
1 stop12h 10m
Lufthansa
Tue 17/220:15
LHR
-
SEA
1 stop25h 05m
Lufthansa
Deal found 20/1£409
Sat 2/515:40
SEA
-
LGW
1 stop12h 05m
Icelandair
Wed 6/515:40
LGW
-
SEA
1 stop13h 00m
Icelandair
Deal found 21/1£409
Tue 5/519:00
SEA
-
LHR
1 stop17h 20m
Icelandair
Fri 15/513:05
LHR
-
SEA
1 stop12h 50m
Icelandair
Deal found 21/1£409
Wed 25/215:10
SEA
-
STN
2 stops23h 30m
Multiple Airlines
Sat 28/218:00
STN
-
SEA
2 stops27h 20m
Multiple Airlines
Deal found 22/1£410
Thu 30/419:00
SEA
-
LGW
1 stop32h 45m
Icelandair
Sun 10/515:40
LGW
-
SEA
1 stop13h 00m
Icelandair
Deal found 21/1£410
Sun 15/215:40
SEA
-
LHR
1 stop12h 10m
Lufthansa
Fri 27/207:40
LHR
-
SEA
1 stop13h 40m
Lufthansa
Deal found 22/1£410
Fri 8/519:00
SEA
-
LHR
1 stop17h 20m
Icelandair
Fri 15/513:05
LHR
-
SEA
1 stop12h 50m
Icelandair
Deal found 21/1£411
Mon 2/214:35
SEA
-
STN
2 stops19h 45m
Multiple Airlines
Mon 9/206:30
STN
-
SEA
2 stops18h 30m
Multiple Airlines
Deal found 19/1£412

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 22 January 2026.

Round-trip from

£408

One-way from

£201

Popular in

June

Cheapest in

February

Average price

£482

Good round-trip deal

£519 or less

Good one-way deal

£381 or less
Icelandair
  • Icelandair
  • 6/5-10/5
  • 2 total stops
  • 28h 00m total
  • Washington to London
Search Deals
16/5
  • 16/5
  • 2 total stops
  • 23h 45m 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 (£14 potential savings vs. average return price).
Search Deals
Average for round-trip flights in January 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 22 January 2026.
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 - STN

SEASTN

Seattle/Tacoma Intl

Wed 4/2

14:35-18:00

2 stops19h 25m

London Stansted

Mon 9/2

21:20-17:00

2 stops27h 40m

£433

SeattleLondon

SEA - LTN

SEALTN

Seattle/Tacoma Intl

Wed 25/2

15:10-19:25

2 stops20h 15m

London Luton

Sat 28/2

20:50-13:20

2 stops24h 30m

£433

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Wed 25/2

09:55-11:50

1 stop17h 55m

London Heathrow

Wed 11/3

13:25-19:03

2 stops36h 38m

£434

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Wed 25/2

18:50-12:20

Nonstop9h 30m

London Heathrow

Fri 6/3

09:25-11:30

Nonstop10h 05m

£441

PortlandLondon

PDX - LHR

PDXLHR

Portland

Tue 10/2

14:13-12:15

1 stop14h 02m

London Heathrow

Wed 4/3

13:45-15:55

Nonstop10h 10m

£445

PortlandLondon

PDX - LHR

PDXLHR

Portland

Wed 11/2

06:00-08:15

1 stop18h 15m

London Heathrow

Wed 4/3

13:45-15:55

Nonstop10h 10m

£445

PortlandLondon

PDX - LHR

PDXLHR

Portland

Tue 10/2

08:30-09:40

1 stop17h 10m

London Heathrow

Wed 25/2

12:05-22:59

1 stop18h 54m

£447

PortlandLondon

PDX - LGW

PDXLGW

Portland

Mon 11/5

15:30-14:40

1 stop15h 10m

London Gatwick

Mon 25/5

15:40-11:45

1 stop28h 05m

£449

PortlandLondon

PDX - LHR

PDXLHR

Portland

Sat 14/2

14:05-06:50

1 stop32h 45m

London Heathrow

Wed 4/3

13:45-15:55

Nonstop10h 10m

£453

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Wed 29/4

20:20-13:45

Nonstop9h 25m

London Heathrow

Wed 6/5

16:30-18:25

Nonstop9h 55m

£454

Flights are sorted by cheapest return flights first.

Deals found on 21/1

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, May is the cheapest month in which you can book a flight from State of Washington to London (average of £367). Flying from State of Washington to London in June is currently the most expensive (average of £590). 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 22 January 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 22 January 2026.

The most flights from USWA to LON are scheduled on a Tuesday (17 on average). You will have fewer flight options on Thursday, 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?

    United Airlines, British Airways, and Icelandair can get you from State of Washington to London in just under 9h 30m. Your travel time can differ by up to 8h 25m. 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. British Airways flights start at £293 while deals on Virgin Atlantic 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 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 (81%), Delta (81%), Virgin Atlantic (81%).

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

    On average you can expect to pay £517 for a flight from State of Washington to London. The cheapest flight overall is £271 while the most popular route, (Seattle/Tacoma Intl - London Heathrow) is currently priced at £368.

  • 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 £367). Flying from State of Washington to London in June is currently the most expensive (average of £590). 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
Luton
Croydon
Wembley
Gatwick
Slough
Hounslow
Ilford
Brentford
Hayes
Colchester
Watford
Crawley
Bedford
Kingston upon Thames
Chelmsford
Eastbourne
Romford
Folkestone
Southend-on-Sea

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
Boston to Heathrow flights
Dulles Intl to Heathrow flights
LaGuardia to Heathrow flights
Los Angeles to Heathrow flights
Newark to Gatwick flights
John F Kennedy Intl to London City flights
John F Kennedy Intl to Gatwick flights
O'Hare Intl to Heathrow flights
San Francisco to Heathrow flights
John F Kennedy Intl to Stansted flights
LaGuardia to Gatwick flights
Dallas/Fort Worth to Heathrow flights
Baltimore to Heathrow flights
Seattle to Heathrow flights
Boston to Gatwick flights
Atlanta to Heathrow flights
Miami to Heathrow flights
Newark to Stansted flights
Orlando to Heathrow flights
Newark to London City flights
Newark to Luton flights
Boston to London City flights
Dulles Intl to Gatwick flights
Hobby to Heathrow flights
Denver to Heathrow flights
Reagan-National to Heathrow flights
Los Angeles to Gatwick flights
Philadelphia to Heathrow flights
Dulles Intl to London City flights
Boston to Stansted flights
Newark to Edinburgh flights
O'Hare Intl to Gatwick flights
Baltimore to Gatwick flights
Los Angeles to London City flights
John F Kennedy Intl to Edinburgh flights
Tampa to Heathrow flights
San Francisco to Gatwick flights
Reagan-National to Gatwick flights
Los Angeles to Stansted flights
O'Hare Intl to London City flights
Minneapolis to Heathrow flights
O'Hare Intl to Stansted flights
Charlotte to Heathrow flights
Detroit to Heathrow flights
San Francisco to London City flights
Boston to Edinburgh 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 22 January 2026.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest£353Average£519FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Virgin AtlanticCheapest£368Average£586FlexibilityNo 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.