Find flights
Deals
When to book
Airlines
FAQs

Cheap flights from London to Washington from £300

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 28/8. Fares are subject to change and may not be available on all flights or dates of travel.
LON — SEA
22 Jul — 29 Jul1
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 22 June 2026.

Sat 4/717:45
LHR
-
SEA
Nonstop10h 18m
Virgin Atlantic
Mon 13/722:40
SEA
-
LHR
1 stop13h 30m
Virgin Atlantic
Deal found 19/6£478
Mon 24/806:55
LHR
-
SEA
2 stops18h 47m
United Airlines
Fri 4/918:10
SEA
-
LHR
2 stops18h 30m
United Airlines
Deal found 19/6£479
Tue 27/1014:55
LHR
-
SEA
Nonstop10h 00m
British Airways
Sun 8/1118:50
SEA
-
LHR
Nonstop9h 30m
British Airways
Deal found 21/6£480
Mon 7/915:40
LGW
-
SEA
1 stop34h 15m
Icelandair
Wed 16/915:40
SEA
-
LGW
1 stop15h 00m
Icelandair
Deal found 21/6£480
Thu 1/1006:50
LHR
-
SEA
2 stops19h 29m
United Airlines
Tue 13/1008:10
SEA
-
LHR
2 stops18h 15m
United Airlines
Deal found 20/6£480
Mon 21/906:50
LHR
-
SEA
2 stops19h 51m
United Airlines
Mon 28/912:43
SEA
-
LHR
1 stop15h 42m
United Airlines
Deal found 21/6£481
Mon 31/815:40
LGW
-
SEA
1 stop28h 05m
Icelandair
Tue 8/919:00
SEA
-
LGW
1 stop11h 40m
Icelandair
Deal found 17/6£482
Fri 3/706:30
LHR
-
SEA
1 stop13h 03m
KLM
Sat 11/718:20
SEA
-
LHR
Nonstop9h 50m
KLM
Deal found 19/6£482
Sat 4/706:55
LHR
-
SEA
1 stop18h 04m
United Airlines
Fri 17/707:05
SEA
-
LHR
1 stop16h 50m
United Airlines
Deal found 19/6£483
Sat 27/610:00
LCY
-
SEA
1 stop14h 24m
Delta
Fri 3/707:30
SEA
-
LCY
2 stops17h 20m
Delta
Deal found 17/6£483
Thu 2/709:55
LHR
-
SEA
1 stop14h 25m
Delta
Mon 13/721:50
SEA
-
LHR
Nonstop9h 45m
Delta
Deal found 19/6£483
Sat 4/710:25
LGW
-
SEA
1 stop15h 02m
Delta
Mon 13/718:35
SEA
-
LGW
1 stop13h 25m
Delta
Deal found 17/6£484

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 22 June 2026.

Round-trip from

£478

One-way from

£300

Popular in

July

Cheapest in

February

Average price

£632

Good round-trip deal

£551 or less

Good one-way deal

£593 or less
Virgin Atlantic
  • Virgin Atlantic
  • 4/7-13/7
  • 1 total stop
  • 23h 48m total
  • London to Washington
Search Deals
28/8
  • 28/8
  • 3 total stops
  • 39h 15m total
  • London to Washington
Search Deals
Highest demand for flights based on searches. 11% potential increase in price (£53 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (£8 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 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 22 June 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

Thu 24/9

09:30-21:59

2 stops20h 29m

Seattle/Tacoma Intl

Thu 8/10

05:00-12:25

1 stop23h 25m

£486
Fastest return journey

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Thu 15/10

09:50-11:35

Nonstop9h 45m

Seattle/Tacoma Intl

Mon 19/10

13:30-06:45

Nonstop9h 15m

£496

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Tue 7/7

17:45-20:03

Nonstop10h 18m

Seattle/Tacoma Intl

Mon 13/7

18:15-12:05

Nonstop9h 50m

£507

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Sat 4/7

09:30-17:40

1 stop16h 10m

Seattle/Tacoma Intl

Fri 17/7

14:33-12:25

1 stop13h 52m

£509

LondonSeattle

LCY - SEA

LCYSEA

London City

Thu 15/10

06:45-17:10

1 stop18h 25m

Seattle/Tacoma Intl

Mon 19/10

19:10-20:45

1 stop17h 35m

£513

LondonSeattle

LCY - SEA

LCYSEA

London City

Thu 2/7

10:00-16:20

1 stop14h 20m

Seattle/Tacoma Intl

Thu 9/7

13:45-09:30

1 stop11h 45m

£517

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Mon 23/11

10:00-15:21

1 stop13h 21m

Seattle/Tacoma Intl

Mon 30/11

14:05-15:45

1 stop17h 40m

£528

LondonSeattle

LCY - SEA

LCYSEA

London City

Tue 18/8

09:20-16:27

1 stop15h 07m

Seattle/Tacoma Intl

Mon 21/9

17:45-16:40

1 stop14h 55m

£537

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Fri 10/7

17:45-20:03

Nonstop10h 18m

Seattle/Tacoma Intl

Sat 10/4

21:50-15:35

Nonstop9h 45m

£548

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Mon 10/8

08:00-16:09

1 stop16h 09m

Seattle/Tacoma Intl

Wed 19/8

15:54-12:35

1 stop12h 41m

£554

Flights are sorted by cheapest return flights first.

Deals found on 21/6

Showing 1-10 of 60 resultsSorted by cheapest first
1
2
3
...
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, February is the cheapest month in which you can book a flight from London to State of Washington (average of £295). Flying from London to State of Washington in November is currently the most expensive (average of £1,252). 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 22 June 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 22 June 2026.

The most flights from LON to USWA are scheduled on a Monday (22 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (22 on average).

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

How far ahead should I book a flight from London to State of Washington?

The best time to book flights from London to State of Washington is 80 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.

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 22 June 2026.
Check out reviews from past customers who have flown with Alaska Airlines,KLM, andVirgin Atlantic 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.
Alaska Airlines
7.9
Good
12,563 reviews
Check prices

Comfort

7.8

Food

7.0

Boarding

8.1

Overall

7.9

Crew

8.5

Entertainment

7.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Jun 2026

LHR - SEA

It's my first time flying with Alaska Airlines. All in all it was very good. Excellent crew and the meal was really good .. best mashed potato!! Black point: not waking me up for breakfast. Having departed late from London and arriving in Seattle late at night, it would have been nice to have found a meal on the table when i woke up. Although the crew was very lovely, kind and helpful, I did find it a little regimented in their approach. Also the constant interruptions announcing what we were eating next and unnecessary announcements.
Alaska Airlines
7.9
Good
12,563 reviews
Alaska Airlines
7.9
Good
12,563 reviews
Check prices

Comfort

7.8

Food

7.0

Boarding

8.1

Overall

7.9

Crew

8.5

Entertainment

7.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Jun 2026

LHR - SEA

It's my first time flying with Alaska Airlines. All in all it was very good. Excellent crew and the meal was really good .. best mashed potato!! Black point: not waking me up for breakfast. Having departed late from London and arriving in Seattle late at night, it would have been nice to have found a meal on the table when i woke up. Although the crew was very lovely, kind and helpful, I did find it a little regimented in their approach. Also the constant interruptions announcing what we were eating next and unnecessary announcements.
KLM
7.8
Good
1,530 reviews
Alaska Airlines
7.9
Good
12,563 reviews
Check prices

Comfort

7.8

Food

7.0

Boarding

8.1

Overall

7.9

Crew

8.5

Entertainment

7.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Jun 2026

LHR - SEA

It's my first time flying with Alaska Airlines. All in all it was very good. Excellent crew and the meal was really good .. best mashed potato!! Black point: not waking me up for breakfast. Having departed late from London and arriving in Seattle late at night, it would have been nice to have found a meal on the table when i woke up. Although the crew was very lovely, kind and helpful, I did find it a little regimented in their approach. Also the constant interruptions announcing what we were eating next and unnecessary announcements.
Virgin Atlantic
7.5
Good
690 reviews
Alaska Airlines
7.9
Good
12,563 reviews
Check prices

Comfort

7.8

Food

7.0

Boarding

8.1

Overall

7.9

Crew

8.5

Entertainment

7.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Jun 2026

LHR - SEA

It's my first time flying with Alaska Airlines. All in all it was very good. Excellent crew and the meal was really good .. best mashed potato!! Black point: not waking me up for breakfast. Having departed late from London and arriving in Seattle late at night, it would have been nice to have found a meal on the table when i woke up. Although the crew was very lovely, kind and helpful, I did find it a little regimented in their approach. Also the constant interruptions announcing what we were eating next and unnecessary announcements.
Icelandair
7.0
Good
683 reviews
Alaska Airlines
7.9
Good
12,563 reviews
Check prices

Comfort

7.8

Food

7.0

Boarding

8.1

Overall

7.9

Crew

8.5

Entertainment

7.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Jun 2026

LHR - SEA

It's my first time flying with Alaska Airlines. All in all it was very good. Excellent crew and the meal was really good .. best mashed potato!! Black point: not waking me up for breakfast. Having departed late from London and arriving in Seattle late at night, it would have been nice to have found a meal on the table when i woke up. Although the crew was very lovely, kind and helpful, I did find it a little regimented in their approach. Also the constant interruptions announcing what we were eating next and unnecessary announcements.
British Airways
6.7
Okay
8,064 reviews
Alaska Airlines
7.9
Good
12,563 reviews
Check prices

Comfort

7.8

Food

7.0

Boarding

8.1

Overall

7.9

Crew

8.5

Entertainment

7.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Jun 2026

LHR - SEA

It's my first time flying with Alaska Airlines. All in all it was very good. Excellent crew and the meal was really good .. best mashed potato!! Black point: not waking me up for breakfast. Having departed late from London and arriving in Seattle late at night, it would have been nice to have found a meal on the table when i woke up. Although the crew was very lovely, kind and helpful, I did find it a little regimented in their approach. Also the constant interruptions announcing what we were eating next and unnecessary announcements.

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 9h 45m. Fly via United Airlines, British Airways, or Delta to get the fastest option. The distance between London and State of Washington is about 4783 mi. This flight may include one or multiple stops.

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

    While some choose either London Gatwick - Seattle/Tacoma Intl or London City - 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 (85%), Air France (85%), Delta (85%).

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

    On average you can expect to pay £1,693 for a flight from London to State of Washington. The cheapest flight overall is £384 while the most popular route, (London Heathrow - Seattle/Tacoma Intl) is currently priced at £379.

  • 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, February is the cheapest month in which you can book a flight from London to State of Washington (average of £295). Flying from London to State of Washington in November is currently the most expensive (average of £1,252). 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

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 London to Washington

See prices for flight routes from nearby airports that may be better suited for you.
Heathrow to John F Kennedy Intl flights
Heathrow to Newark flights
Gatwick to John F Kennedy Intl flights
Heathrow to LaGuardia flights
Stansted to John F Kennedy Intl flights
London City to John F Kennedy Intl flights
Gatwick to Newark flights
Heathrow to Los Angeles flights
Heathrow to Orlando flights
Gatwick to LaGuardia flights
Heathrow to Miami flights
London City to Newark flights
Luton to John F Kennedy Intl flights
Stansted to Newark flights
Heathrow to Boston flights
Luton to Newark flights
Manchester to John F Kennedy Intl flights
Heathrow to Dallas/Fort Worth flights
Heathrow to San Francisco flights
Manchester to Orlando flights
Heathrow to O'Hare Intl flights
Heathrow to Dulles Intl flights
Gatwick to Orlando flights
Heathrow to Las Vegas flights
Gatwick to Los Angeles flights
Heathrow to Baltimore flights
Gatwick to Miami flights
Stansted to Los Angeles flights
Heathrow to Atlanta flights
London City to Los Angeles flights
Heathrow to Seattle flights
Stansted to Miami flights
Manchester to Newark flights
Stansted to Orlando flights
Gatwick to Boston flights
London City to Miami flights
Edinburgh to Newark flights
Manchester to LaGuardia flights
Heathrow to Tampa flights
Heathrow to Hobby flights
London City to Boston flights
Heathrow to Sky Harbor Intl flights
Heathrow to Ontario flights
Birmingham to LaGuardia flights
London City to Orlando flights
Heathrow to George Bush Intcntl flights
Gatwick to San Francisco flights
Stansted to Boston flights
Luton to Miami flights
Gatwick to Dallas/Fort Worth flights

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 22 June 2026.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest£339Average£513FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
IcelandairCheapest£347Average£506FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Aer LingusCheapest£423Average£662FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
Virgin AtlanticCheapest£435Average£765FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
KLMCheapest£443Average£771FlexibilityNo cancel feeOn-time75%
Search KLM flights
DeltaCheapest£447Average£627FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Air FranceCheapest£456Average£666FlexibilityNo cancel feeOn-time77%
Search Air France flights
British AirwaysCheapest£465Average£647FlexibilityNo cancel feeOn-time70%
Search British Airways flights
United AirlinesCheapest£473Average£600FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
FinnairCheapest£481Average£684FlexibilityNo 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.

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.