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Cheap flights from London to Washington from £252

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 5/6. Fares are subject to change and may not be available on all flights or dates of travel.
LON — SEA
3 May — 10 May1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from London to Washington

Enter your travel dates to find the best prices.

Cheapest flights from London to Washington
Explore the most affordable flight options available from London to Washington. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 3 April 2026.

Fri 22/509:50
LHR
-
SEA
Nonstop9h 45m
British Airways
Wed 24/613:30
SEA
-
LHR
Nonstop9h 15m
British Airways
Deal found 29/3£456
Mon 27/406:30
STN
-
SEA
3 stops35h 10m
Multiple Airlines
Mon 4/515:40
SEA
-
STN
2 stops19h 35m
Multiple Airlines
Deal found 30/3£457
Thu 1/1016:30
LHR
-
SEA
Nonstop9h 55m
British Airways
Mon 12/1020:20
SEA
-
LHR
Nonstop9h 25m
British Airways
Deal found 30/3£464
Mon 13/408:30
STN
-
SEA
3 stops37h 49m
Multiple Airlines
Sun 26/415:40
SEA
-
STN
2 stops20h 15m
Multiple Airlines
Deal found 30/3£469
Wed 29/417:45
LHR
-
SEA
Nonstop10h 19m
Delta
Tue 5/512:10
SEA
-
LHR
1 stop16h 55m
Delta
Deal found 2/4£470
Mon 27/414:45
LHR
-
SEA
1 stop17h 51m
American Airlines
Mon 4/511:16
SEA
-
LHR
1 stop15h 14m
American Airlines
Deal found 2/4£472
Mon 27/412:25
LHR
-
SEA
1 stop16h 14m
Delta
Tue 5/515:35
SEA
-
LHR
1 stop13h 30m
Delta
Deal found 2/4£473
Mon 13/421:25
LHR
-
SEA
1 stop31h 15m
Icelandair
Sun 26/415:40
SEA
-
LHR
1 stop12h 15m
Icelandair
Deal found 30/3£480
Thu 23/410:25
LGW
-
SEA
1 stop13h 35m
Condor
Mon 27/418:10
SEA
-
LGW
1 stop16h 40m
Condor
Deal found 31/3£484
Mon 13/415:40
LGW
-
SEA
1 stop13h 00m
Icelandair
Mon 20/415:40
SEA
-
LGW
1 stop15h 00m
Icelandair
Deal found 1/4£485
Sat 16/521:25
LHR
-
SEA
1 stop31h 15m
Icelandair
Mon 3/823:25
SEA
-
LHR
1 stop28h 30m
Icelandair
Deal found 31/3£485
Wed 2/915:40
LGW
-
SEA
1 stop13h 00m
Icelandair
Wed 30/919:00
SEA
-
LGW
1 stop11h 40m
Icelandair
Deal found 1/4£486

Find flight deals from London to Washington

Keep the following information in mind while searching for London to Washington flight deals. Data was last updated 3 April 2026.

Round-trip from

£456

One-way from

£252

Popular in

July

Cheapest in

February

Average price

£537

Good round-trip deal

£663 or less

Good one-way deal

£507 or less
British Airways
  • British Airways
  • 22/5-24/6
  • Nonstop
  • 19h 00m total
  • London to Washington
Search Deals
5/6
  • 5/6
  • 1 total stop
  • 33h 30m total
  • London to Washington
Search Deals
Highest demand for flights based on searches. 11% potential increase in price (£56 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£9 potential savings vs. average return price).
Search Deals
Average for round-trip flights in April 2026
Search Deals
Price to beat on a round-trip flight from London (LON) to Washington.
Search Deals
Price to beat on a one-way flight from London (LON) to Washington.
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from London to Washington 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 3 April 2026.
Use the filters below to find and compare flights from London to Washington that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Mon 20/4

21:25-20:40

1 stop31h 15m

Seattle/Tacoma Intl

Fri 24/4

19:00-20:20

1 stop17h 20m

£502

LondonSeattle

LTN - SEA

LTNSEA

London Luton

Fri 1/5

06:20-09:40

3 stops35h 20m

Seattle/Tacoma Intl

Mon 4/5

15:40-01:10

3 stops25h 30m

£518

LondonSeattle

LTN - SEA

LTNSEA

London Luton

Mon 13/4

08:15-17:10

1 stop16h 55m

Seattle/Tacoma Intl

Sun 26/4

19:10-15:25

1 stop12h 15m

£524

LondonSeattle

LTN - SEA

LTNSEA

London Luton

Wed 29/4

06:15-09:40

3 stops35h 25m

Seattle/Tacoma Intl

Tue 5/5

13:30-20:30

3 stops23h 00m

£573

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Thu 11/6

10:25-17:30

1 stop15h 05m

Seattle/Tacoma Intl

Sun 5/7

18:35-16:00

1 stop13h 25m

£583

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Wed 1/7

11:20-20:19

1 stop16h 59m

Seattle/Tacoma Intl

Wed 8/7

07:15-06:45

1 stop15h 30m

£584

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Fri 15/5

08:40-20:41

2 stops20h 01m

Seattle/Tacoma Intl

Sun 7/6

22:05-15:35

Nonstop9h 30m

£589

LondonSeattle

LCY - SEA

LCYSEA

London City

Wed 3/6

10:00-23:43

2 stops21h 43m

Seattle/Tacoma Intl

Mon 8/6

17:45-17:20

1 stop15h 35m

£604

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Thu 28/5

19:50-13:45

2 stops25h 55m

Seattle/Tacoma Intl

Sat 6/6

15:55-18:50

2 stops18h 55m

£604

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Fri 15/5

10:25-22:45

2 stops20h 20m

Seattle/Tacoma Intl

Sun 7/6

18:50-16:00

1 stop13h 10m

£605

Flights are sorted by cheapest return flights first.

Deals found on 2/4

Showing 1-10 of 60 resultsSorted by cheapest first
1
2
3
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6

Best time to book a flight from London to Washington

Have a flexible travel schedule? Discover the best time to fly to Washington from London 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 London to Washington

What is the cheapest month to book a flight from London to State of Washington?

Currently, January is the cheapest month in which you can book a flight from London to State of Washington (average of £354). Flying from London to State of Washington in August is currently the most expensive (average of £473). 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 LON to WA?

Find hourly flight availability from London to Washington. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 3 April 2026.

When flying from London to State of Washington, 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 London to State of Washington

Explore weekly flight availability from London to Washington. 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 3 April 2026.

The most flights from LON to USWA are scheduled on a Wednesday (21 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (10 on average).

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

Reviews of airlines servicing Washington

Get insights into the airlines that provide service to Washington. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Washington. Reviews last updated 3 April 2026.
Check out reviews from past customers who have flown with KLM,Virgin Atlantic, andAir France from London to Washington to help guide your decision. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
KLM
7.7
Good
1,485 reviews
Check prices

Boarding

7.8

Overall

7.7

Entertainment

7.1

Food

7.3

Comfort

7.6

Crew

8.4

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas
KLM
7.7
Good
1,485 reviews
KLM
7.7
Good
1,485 reviews
Check prices

Boarding

7.8

Overall

7.7

Entertainment

7.1

Food

7.3

Comfort

7.6

Crew

8.4

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas
Virgin Atlantic
7.5
Good
685 reviews
KLM
7.7
Good
1,485 reviews
Check prices

Boarding

7.8

Overall

7.7

Entertainment

7.1

Food

7.3

Comfort

7.6

Crew

8.4

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas
Air France
7.4
Good
1,563 reviews
KLM
7.7
Good
1,485 reviews
Check prices

Boarding

7.8

Overall

7.7

Entertainment

7.1

Food

7.3

Comfort

7.6

Crew

8.4

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas
Icelandair
7.0
Good
630 reviews
KLM
7.7
Good
1,485 reviews
Check prices

Boarding

7.8

Overall

7.7

Entertainment

7.1

Food

7.3

Comfort

7.6

Crew

8.4

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas
British Airways
6.7
Okay
7,848 reviews
KLM
7.7
Good
1,485 reviews
Check prices

Boarding

7.8

Overall

7.7

Entertainment

7.1

Food

7.3

Comfort

7.6

Crew

8.4

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas

Related info for your journey

Find useful and relevant information for your journey from London to Washington. 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 London to State of Washington?

    There are many flights that can get you from London to State of Washington in 15h 05m. Fly via Icelandair, Delta, or Virgin Atlantic to get the fastest option. The distance between London and State of Washington is about 4807 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines to fly from London to State of Washington one-way?

    To fly one-way, consider booking your trip with Icelandair, which is currently one of the cheapest options available, starting at £358. British Airways flights start at £376 while deals on Aer Lingus start at £392 one-way.

  • What are the most popular routes from London to State of Washington?

    While some choose either London Gatwick - Seattle/Tacoma Intl or London Stansted - Seattle/Tacoma Intl, London Heathrow - Seattle/Tacoma Intl is the most popular route from London to State of Washington.

  • What are the most reliable airlines from London to State of Washington?

    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 London to State of Washington on time: KLM (96%), Delta (94%), Virgin Atlantic (94%).

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

    On average you can expect to pay £1,752 for a flight from London to State of Washington. The cheapest flight overall is £420 while the most popular route, (London Heathrow - Seattle/Tacoma Intl) is currently priced at £464.

  • Can I find deals for flights from London to Washington that include hotel bookings?

    Yes. In addition to deals on London to Washington flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from London to Washington?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from London to Washington.

  • Can I find deals for business class flights from London to Washington?

    Yes. Cheapflights offers flight deals from London to Washington 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 London to State of Washington?

    Currently, January is the cheapest month in which you can book a flight from London to State of Washington (average of £354). Flying from London to State of Washington in August is currently the most expensive (average of £473). 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

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Alternative routes for London to Washington

See prices for flight routes from nearby airports that may be better suited for you.
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Top 10 airlines flying from London to Washington

Discover the top 10 airlines that operate flights from London to Washington. 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 3 April 2026.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest£339Average£549FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
IcelandairCheapest£346Average£480FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
IberiaCheapest£412Average£661FlexibilityNo cancel feeOn-time77%
Search Iberia flights
Aer LingusCheapest£424Average£682FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
Virgin AtlanticCheapest£434Average£624FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
United AirlinesCheapest£437Average£620FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
KLMCheapest£448Average£642FlexibilityNo cancel feeOn-time75%
Search KLM flights
British AirwaysCheapest£456Average£637FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Air FranceCheapest£457Average£647FlexibilityNo cancel feeOn-time77%
Search Air France flights
FinnairCheapest£468Average£654FlexibilityNo cancel feeOn-time76%
Search Finnair 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 London to Washington?

Deals for London to Washington flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

Why should you use Cheapflights to find cheap flight tickets from London to Washington?

Cheapflights simply makes it quick and affordable to book flights from London to Washington by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

Can Cheapflights find flights from London to Washington with no change fees?

Yes, we can. To see specific flights from London to Washington with no change fees, users can toggle flexible booking options after using the search form above to find flights.

Can Cheapflights notify me if prices for flights from London to Washington become cheaper?

Yes! Start tracking prices for London to Washington flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

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