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Cheap flights from California to London from £138

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 9/7. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — LON
8 Jul — 15 Jul1
1 adult

Cheap flight deals from California to London

Keep the following information in mind while searching for California to London flight deals. Data was last updated 3 July 2025.

Round-trip from

£385

One-way from

£138

Popular in

December

Cheapest in

October

Average price

£595

Good round-trip deal

£388 or less

Good one-way deal

£193 or less
Air France
  • Air France
  • 24/9-16/10
  • 2 total stops
  • 25h 54m total
  • California to London
Search Deals
Norse Atlantic UK
  • Norse Atlantic UK
  • 9/7
  • Nonstop
  • 10h 25m total
  • California to London
Search Deals
Highest demand for flights based on searches. 9% potential increase in price (£40 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£12 potential savings vs. average return price).
Search Deals
Average for round-trip flights in July 2025
Search Deals
Price to beat on a round-trip flight from California to London (LON).
Search Deals
Price to beat on a one-way flight from California to London (LON).
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Find flight deals from California to London

Cheapest flights from California to London
Explore the most affordable flight options available from California to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 3 July 2025.

Wed 24/913:15ONT - LHR
1 stop12h 35mMultiple Airlines
Thu 16/1010:55LHR - ONT
1 stop13h 19mMultiple Airlines
Deal found 1/7£385
Wed 24/906:00ONT - LHR
1 stop21h 20mDelta
Thu 23/1009:55LHR - ONT
2 stops20h 47mDelta
Deal found 1/7£385
Tue 18/1112:00ONT - LHR
1 stop14h 35mKLM
Wed 26/1114:20LHR - ONT
1 stop16h 21mKLM
Deal found 1/7£390
Sun 31/806:10LAX - LHR
1 stop16h 30mBritish Airways
Thu 13/1110:00LHR - LAX
Nonstop11h 30mBritish Airways
Deal found 2/7£408
Wed 6/811:50LAX - LTN
2 stops24h 55mMultiple Airlines
Mon 18/821:55LTN - LAX
2 stops29h 45mMultiple Airlines
Deal found 2/7£408
Mon 8/914:30LAX - LGW
1 stop24h 15mMultiple Airlines
Sat 20/909:50LGW - LAX
Nonstop11h 15mMultiple Airlines
Deal found 2/7£408
Sun 21/912:05LAX - LHR
1 stop13h 30mAir Canada
Sat 4/1009:30LHR - LAX
2 stops17h 28mAir Canada
Deal found 2/7£409
Thu 14/812:57LAX - LHR
1 stop12h 43mMultiple Airlines
Mon 1/917:50LHR - LAX
2 stops33h 50mMultiple Airlines
Deal found 1/7£409
Tue 16/911:25LAX - LGW
2 stops22h 25mSWISS
Wed 24/918:35LGW - LAX
1 stop29h 55mSWISS
Deal found 3/7£410
Tue 12/820:15LAX - STN
1 stop13h 55mMultiple Airlines
Thu 21/822:55STN - LAX
2 stops26h 33mMultiple Airlines
Deal found 1/7£410
Mon 21/719:50LAX - LGW
1 stop19h 00mIberia
Thu 31/710:25LGW - LAX
1 stop35h 36mIberia
Deal found 1/7£411
Sat 19/723:55LAX - LHR
1 stop22h 30mDelta
Thu 14/809:55LHR - LAX
Nonstop11h 20mDelta
Deal found 1/7£412

Cheapflights Fare Finder

Customise your flight search to find flights from California 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 3 July 2025.
Use the filters below to find and compare flights from California to London that are best for you.

Fly from

California

Fly to

London

Route

Depart

Return

Price

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Wed 24/9

13:15-09:50

1 stop12h 35m

London Heathrow

Thu 16/10

10:55-16:14

1 stop13h 19m

£385

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Wed 24/9

06:00-11:20

1 stop21h 20m

London Heathrow

Thu 23/10

09:55-22:42

2 stops20h 47m

£385

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Tue 18/11

12:00-10:35

1 stop14h 35m

London Heathrow

Wed 26/11

14:20-22:41

1 stop16h 21m

£390

Los AngelesLondon

LAX - LHR

LAXLHR

Los Angeles

Sun 31/8

06:10-06:40

1 stop16h 30m

London Heathrow

Thu 13/11

10:00-13:30

Nonstop11h 30m

£408

Los AngelesLondon

LAX - LTN

LAXLTN

Los Angeles

Wed 6/8

11:50-20:45

2 stops24h 55m

London Luton

Mon 18/8

21:55-19:40

2 stops29h 45m

£408

Los AngelesLondon

LAX - LHR

LAXLHR

Los Angeles

Sun 21/9

12:05-09:35

1 stop13h 30m

London Heathrow

Sat 4/10

09:30-18:58

2 stops17h 28m

£409

Los AngelesLondon

LAX - LHR

LAXLHR

Los Angeles

Thu 14/8

10:15-07:25

1 stop13h 10m

London Heathrow

Fri 29/8

16:15-23:02

1 stop14h 47m

£409

Los AngelesLondon

LAX - LGW

LAXLGW

Los Angeles

Tue 16/9

11:25-17:50

2 stops22h 25m

London Gatwick

Tue 23/9

18:35-16:30

1 stop29h 55m

£410

Los AngelesLondon

LAX - LHR

LAXLHR

Los Angeles

Sat 30/8

10:33-09:00

1 stop14h 27m

London Heathrow

Sat 20/9

10:20-17:05

1 stop14h 45m

£411

Los AngelesLondon

LAX - LGW

LAXLGW

Los Angeles

Mon 21/7

19:50-22:50

1 stop19h 00m

London Gatwick

Thu 31/7

10:25-14:01

1 stop35h 36m

£411

Flights are sorted by cheapest return flights first.

Deals found on 2/7

Showing 1-10 of 60 results
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Best time to book a flight from California to London

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

What is the cheapest month to book a flight from California to London?

Currently, January is the cheapest month in which you can book a flight from California to London (average of £112). Flying from California to London in August is currently the most expensive (average of £164). 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 CA to LON?

Find hourly flight availability from California 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 3 July 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from California to London as you normally would.

Weekly flight availability from California to London

Explore weekly flight availability from California 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 3 July 2025.

The most flights from USCA to LON are scheduled on a Monday (59 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (35 on average).

Reviews of airlines servicing London

Get insights into the airlines that provide service to London. 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 London. Reviews last updated 3 July 2025.
Get a feel of what it's like to fly with Delta, Alaska Airlines, andKLM from California to London by reading reviews from past customers. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very Good
7,982 reviews
Check prices

Comfort

7.9

Boarding

8.2

Food

7.3

Overall

8.0

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Delta
8.0
Very Good
7,982 reviews
Delta
8.0
Very Good
7,982 reviews
Check prices

Comfort

7.9

Boarding

8.2

Food

7.3

Overall

8.0

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Alaska Airlines
8.0
Very Good
10,000 reviews
Delta
8.0
Very Good
7,982 reviews
Check prices

Comfort

7.9

Boarding

8.2

Food

7.3

Overall

8.0

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
KLM
7.8
Good
1,366 reviews
Delta
8.0
Very Good
7,982 reviews
Check prices

Comfort

7.9

Boarding

8.2

Food

7.3

Overall

8.0

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Austrian Airlines
7.6
Good
809 reviews
Delta
8.0
Very Good
7,982 reviews
Check prices

Comfort

7.9

Boarding

8.2

Food

7.3

Overall

8.0

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Finnair
7.6
Good
1,306 reviews
Delta
8.0
Very Good
7,982 reviews
Check prices

Comfort

7.9

Boarding

8.2

Food

7.3

Overall

8.0

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Related info for your journey

Find useful and relevant information for your journey from California to London. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What are the cheapest airlines to fly from California to London one-way?

    One-way options have recently been found by users for as low as £138 on Norse Atlantic UK. Other airlines that offer cheap prices include TAP AIR PORTUGAL from £150 and A.P.G. from £174 one-way.

  • What are the most popular routes from California to London?

    The most popular flight routes from California to London are Los Angeles - London Heathrow, San Francisco - London Heathrow and Los Angeles - London City.

  • What are the most reliable airlines from California to London?

    Before booking your flight to London from California, check out the most reliable airlines to get you to your destination on time: Air Canada (86%), Austrian Airlines (86%), United Airlines( 86%).

  • What are the cheapest flights from California to London?

    Looking for the cheapest flight from California to London? While on average our users pay £1,787, our data indicates the cheapest price to be £290. The most popular route (Los Angeles - London Heathrow), is priced around £273.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from California 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 California to London?

    Currently, January is the cheapest month in which you can book a flight from California to London (average of £112). Flying from California to London in August is currently the most expensive (average of £164). 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 California?

Book flights to California if you plan to visit one of these locations
Hounslow
Croydon
Milton Keynes
Deal
Gatwick
Luton
Slough
Wembley
Crawley
Eastbourne
Ilford
Hayes
Folkestone
Southend-on-Sea
Watford
Ipswich
Winchester
Maidstone
Guildford
Chichester

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 California to London

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

Discover the top 10 airlines that operate flights from California 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 3 July 2025.
AirlineCheapestAverageFlexibilityOn-time
Scandinavian AirlinesCheapest£298Average£437FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
LufthansaCheapest£313Average£668FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Norse Atlantic UKCheapest£366Average£530FlexibilityNo cancel feeOn-timeN/A
Search Norse Atlantic UK flights
TAP AIR PORTUGALCheapest£384Average£399FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
Air FranceCheapest£386Average£550FlexibilityNo cancel feeOn-time77%
Search Air France flights
Virgin AtlanticCheapest£403Average£625FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
FinnairCheapest£412Average£717FlexibilityNo cancel feeOn-time76%
Search Finnair flights
IberiaCheapest£420Average£534FlexibilityNo cancel feeOn-time77%
Search Iberia flights
British AirwaysCheapest£423Average£603FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Air CanadaCheapest£426Average£600FlexibilityNo cancel feeOn-time67%
Search Air Canada 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 California to London?

Deals for California to London 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 California to London?

Cheapflights helps you find that perfect flight to London from California by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

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

Yes, we can. To see specific flights from California to London 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 California to London become cheaper?

Yes, Cheapflights offers price alerts on California to London flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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