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Cheap flights from Washington to London from £165

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 27/4. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — LON
24 Apr — 1 May1
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 25 March 2026.

Mon 20/415:40
SEA
-
LGW
2 stops19h 35m
Multiple Airlines
Mon 27/420:45
LGW
-
SEA
3 stops29h 10m
Multiple Airlines
Deal found 21/3£455
Fri 1/519:00
SEA
-
STN
2 stops21h 50m
Multiple Airlines
Wed 6/507:45
STN
-
SEA
2 stops33h 55m
Multiple Airlines
Deal found 21/3£456
Mon 20/415:40
SEA
-
LHR
3 stops21h 15m
Multiple Airlines
Mon 27/406:40
LHR
-
SEA
2 stops22h 00m
Multiple Airlines
Deal found 21/3£456
Sun 19/419:00
SEA
-
LHR
3 stops18h 35m
Multiple Airlines
Tue 5/506:40
LHR
-
SEA
2 stops22h 00m
Multiple Airlines
Deal found 21/3£457
Fri 24/419:00
SEA
-
STN
2 stops17h 30m
Multiple Airlines
Wed 6/507:45
STN
-
SEA
3 stops22h 55m
Multiple Airlines
Deal found 21/3£458
Wed 6/519:00
SEA
-
STN
3 stops19h 40m
Multiple Airlines
Wed 20/506:30
STN
-
SEA
2 stops20h 15m
Multiple Airlines
Deal found 20/3£458
Tue 21/415:40
SEA
-
LHR
2 stops16h 45m
Multiple Airlines
Tue 28/407:05
LHR
-
SEA
2 stops18h 50m
Multiple Airlines
Deal found 22/3£460
Tue 14/408:00
SEA
-
STN
2 stops22h 35m
Multiple Airlines
Tue 21/407:10
STN
-
SEA
3 stops34h 28m
Multiple Airlines
Deal found 21/3£460
Tue 14/419:00
SEA
-
LGW
2 stops19h 20m
Multiple Airlines
Tue 28/406:25
LGW
-
SEA
2 stops22h 15m
Multiple Airlines
Deal found 20/3£460
Tue 28/415:40
SEA
-
LTN
3 stops20h 50m
Multiple Airlines
Tue 5/509:15
LTN
-
SEA
2 stops32h 25m
Multiple Airlines
Deal found 21/3£460
Sun 26/415:40
SEA
-
STN
2 stops17h 35m
Multiple Airlines
Tue 12/506:30
STN
-
SEA
2 stops20h 15m
Multiple Airlines
Deal found 24/3£461
Tue 21/419:00
SEA
-
LGW
2 stops19h 20m
Multiple Airlines
Tue 28/406:25
LGW
-
SEA
2 stops19h 30m
Multiple Airlines
Deal found 22/3£461

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 25 March 2026.

Round-trip from

£455

One-way from

£165

Popular in

June

Cheapest in

October

Average price

£514

Good round-trip deal

£654 or less

Good one-way deal

£395 or less
20/4-27/4
  • 20/4-27/4
  • 5 total stops
  • 48h 45m total
  • Washington to London
Search Deals
27/4
  • 27/4
  • 2 total stops
  • 24h 50m total
  • Washington to London
Search Deals
Highest demand for flights based on searches. 14% potential increase in price (£70 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 March 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 25 March 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 - LTN

SEALTN

Seattle/Tacoma Intl

Sun 26/4

15:40-20:30

3 stops20h 50m

London Luton

Tue 12/5

09:40-18:45

2 stops17h 05m

£486

PortlandLondon

PDX - LTN

PDXLTN

Portland

Tue 28/4

15:30-15:30

2 stops16h 00m

London Luton

Mon 4/5

08:15-18:00

2 stops17h 45m

£516

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Tue 25/8

15:55-16:00

1 stop16h 05m

London Heathrow

Mon 5/10

21:05-13:45

2 stops24h 40m

£564

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

Sun 19/4

19:10-22:10

1 stop19h 00m

London Stansted

Tue 5/5

06:55-17:15

1 stop18h 20m

£571

PortlandLondon

PDX - LTN

PDXLTN

Portland

Mon 27/4

15:30-01:10

3 stops25h 40m

London Luton

Tue 12/5

09:45-09:30

3 stops31h 45m

£583

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Tue 5/5

18:20-12:10

Nonstop9h 50m

London Heathrow

Tue 12/5

06:30-11:42

1 stop13h 12m

£596
Fastest return journey

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Tue 1/9

18:20-12:10

Nonstop9h 50m

London Heathrow

Tue 8/9

11:40-14:00

Nonstop10h 20m

£618

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Wed 19/8

06:29-09:40

2 stops19h 11m

London Heathrow

Tue 25/8

11:05-18:59

2 stops39h 54m

£620

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Sun 19/4

13:45-18:30

1 stop20h 45m

London City

Tue 5/5

17:50-11:42

1 stop25h 52m

£622

PortlandLondon

PDX - LHR

PDXLHR

Portland

Sat 2/5

22:55-06:25

1 stop23h 30m

London Heathrow

Tue 12/5

06:30-11:10

1 stop12h 40m

£622

Flights are sorted by cheapest return flights first.

Deals found on 24/3

Showing 1-10 of 60 resultsSorted by cheapest first
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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, February is the cheapest month in which you can book a flight from State of Washington to London (average of £369). Flying from State of Washington to London in June is currently the most expensive (average of £564). 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 25 March 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.

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, Turkish Airlines, and KLM can get you from State of Washington to London in just under 9h 50m. Your travel time can differ by up to 9h 10m. 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 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: American Airlines (85%), Alaska Airlines (85%), Aer Lingus (85%).

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

    On average you can expect to pay £802 for a flight from State of Washington to London. The cheapest flight overall is £349 while the most popular route, (Seattle/Tacoma Intl - London Heathrow) is currently priced at £496.

  • 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, February is the cheapest month in which you can book a flight from State of Washington to London (average of £369). Flying from State of Washington to London in June is currently the most expensive (average of £564). 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
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Croydon
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Luton
Gatwick
Slough
Ilford
Hayes
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Colchester
Eastbourne
Guildford
Watford
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Romford
Ipswich
Bedford
Chelmsford
Bishop's Stortford

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Alternative routes for Washington to London

See prices for flight routes from nearby airports that may be better suited for you.
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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 25 March 2026.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest£354Average£520FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Virgin AtlanticCheapest£369Average£584FlexibilityNo 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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