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Cheap flights from California to London from £159

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
18 Jun — 25 Jun1
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 13 June 2025.

Round-trip from

£385

One-way from

£159

Popular in

December

Cheapest in

October

Average price

£615

Good round-trip deal

£353 or less

Good one-way deal

£194 or less
Delta
  • Delta
  • 15/10-11/11
  • 3 total stops
  • 34h 48m total
  • California to London
Search Deals
9/7
  • 9/7
  • 2 total stops
  • 27h 40m 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 (£13 potential savings vs. average return price).
Search Deals
Average for round-trip flights in June 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).
Search Deals

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 13 June 2025.

Wed 15/1011:29ONT - LHR
1 stop15h 51mDelta
Tue 11/1106:20LHR - ONT
2 stops18h 57mDelta
Deal found 13/6£385
Tue 21/1013:00ONT - LHR
1 stop12h 50mKLM
Wed 29/1009:20LHR - ONT
1 stop17h 22mKLM
Deal found 12/6£391
Thu 24/716:45LAX - LHR
Nonstop10h 25mUnited Airlines
Tue 5/808:30LHR - LAX
1 stop15h 56mUnited Airlines
Deal found 12/6£437
Mon 8/919:45LAX - LGW
1 stop15h 25mMultiple Airlines
Fri 19/910:55LGW - LAX
Nonstop11h 15mMultiple Airlines
Deal found 11/6£437
Sun 5/1021:25LAX - LTN
1 stop27h 50mMultiple Airlines
Thu 9/1019:30LTN - LAX
1 stop31h 35mMultiple Airlines
Deal found 12/6£438
Wed 17/906:00LAX - LHR
2 stops19h 35mAir Canada
Sun 28/909:30LHR - LAX
2 stops19h 23mAir Canada
Deal found 12/6£439
Mon 4/819:35LAX - LCY
1 stop32h 55mSWISS
Wed 20/809:25LCY - LAX
1 stop15h 05mSWISS
Deal found 12/6£439
Mon 21/711:35LAX - LGW
1 stop14h 25mDelta
Tue 5/812:00LGW - LAX
2 stops19h 51mDelta
Deal found 12/6£440
Thu 4/919:35LAX - LGW
1 stop14h 15mSWISS
Sun 14/918:40LGW - LAX
1 stop29h 50mSWISS
Deal found 13/6£441
Thu 7/816:50LAX - LCY
1 stop18h 50mVirgin Atlantic
Thu 21/809:20LCY - LAX
1 stop13h 30mVirgin Atlantic
Deal found 12/6£442
Sun 27/716:30LAX - LGW
Nonstop10h 25mNorse Atlantic UK
Thu 14/810:45LGW - LAX
Nonstop11h 15mNorse Atlantic UK
Deal found 12/6£442
Thu 31/709:10LAX - LHR
1 stop14h 05mDelta
Wed 13/812:25LHR - LAX
1 stop17h 03mDelta
Deal found 13/6£444

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 13 June 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 15/10

11:29-11:20

1 stop15h 51m

London Heathrow

Tue 11/11

06:20-17:17

2 stops18h 57m

£385

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Tue 21/10

13:00-09:50

1 stop12h 50m

London Heathrow

Wed 29/10

09:20-19:42

1 stop17h 22m

£391

Los AngelesLondon

LAX - LHR

LAXLHR

Los Angeles

Thu 24/7

16:45-11:10

Nonstop10h 25m

London Heathrow

Tue 5/8

08:30-16:26

1 stop15h 56m

£437

Los AngelesLondon

LAX - LGW

LAXLGW

Los Angeles

Mon 8/9

19:45-19:10

1 stop15h 25m

London Gatwick

Fri 19/9

10:55-14:10

Nonstop11h 15m

£437

Los AngelesLondon

LAX - LTN

LAXLTN

Los Angeles

Sun 5/10

21:25-09:15

1 stop27h 50m

London Luton

Thu 9/10

19:30-19:05

1 stop31h 35m

£438

Los AngelesLondon

LAX - LHR

LAXLHR

Los Angeles

Wed 17/9

06:00-09:35

2 stops19h 35m

London Heathrow

Sun 28/9

09:30-20:53

2 stops19h 23m

£439

Los AngelesLondon

LAX - LCY

LAXLCY

Los Angeles

Mon 4/8

19:35-12:30

1 stop32h 55m

London City

Wed 20/8

09:25-16:30

1 stop15h 05m

£439

Los AngelesLondon

LAX - LGW

LAXLGW

Los Angeles

Mon 21/7

11:35-10:00

1 stop14h 25m

London Gatwick

Tue 5/8

12:00-23:51

2 stops19h 51m

£440

Los AngelesLondon

LAX - LGW

LAXLGW

Los Angeles

Thu 4/9

19:35-17:50

1 stop14h 15m

London Gatwick

Sun 14/9

18:40-16:30

1 stop29h 50m

£441

Los AngelesLondon

LAX - LCY

LAXLCY

Los Angeles

Thu 7/8

16:50-19:40

1 stop18h 50m

London City

Thu 21/8

09:20-14:50

1 stop13h 30m

£442

Flights are sorted by cheapest return flights first.

Deals found on 11/6

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 13 June 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 13 June 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 (44 on average).

Rainfall in London by month

Plan your trip to London by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in London ranges from 40.0 - 70.0 inches per month. January is typically the wettest month, when rainfall can reach 70.0 mm. July is typically the driest time to visit London when rainfall is around 40.0 mm.

Temperature in London by month

Plan your trip to London by taking into account the average temperature totals by month.

If weather is an important factor for your trip to London, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 17.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 4.0 C).

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 13 June 2025.
See what other customers who have flown with Delta, Alaska Airlines and Porter Airlines from California to London have to say. 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
7,950 reviews
Check prices

Food

7.3

Boarding

8.2

Entertainment

7.9

Overall

8.0

Comfort

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
7,950 reviews
Delta
8.0
Very Good
7,950 reviews
Check prices

Food

7.3

Boarding

8.2

Entertainment

7.9

Overall

8.0

Comfort

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
7,950 reviews
Check prices

Food

7.3

Boarding

8.2

Entertainment

7.9

Overall

8.0

Comfort

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.
Porter Airlines
8.0
Very Good
288 reviews
Delta
8.0
Very Good
7,950 reviews
Check prices

Food

7.3

Boarding

8.2

Entertainment

7.9

Overall

8.0

Comfort

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
1,358 reviews
Delta
8.0
Very Good
7,950 reviews
Check prices

Food

7.3

Boarding

8.2

Entertainment

7.9

Overall

8.0

Comfort

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
802 reviews
Delta
8.0
Very Good
7,950 reviews
Check prices

Food

7.3

Boarding

8.2

Entertainment

7.9

Overall

8.0

Comfort

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 £161 on Norse Atlantic UK. Other airlines that offer cheap prices include TAP AIR PORTUGAL from £171 and A.P.G. from £227 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 (83%), Austrian Airlines (83%), United Airlines( 83%).

  • What are the cheapest flights from California to London?

    Looking for the cheapest flight from California to London? While on average our users pay £1,930, our data indicates the cheapest price to be £293. The most popular route (Los Angeles - London Heathrow), is priced around £319.

  • 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
Deal
Hounslow
Croydon
Milton Keynes
Gatwick
Luton
Slough
Wembley
Crawley
Eastbourne
Ilford
Southend-on-Sea
Watford
Hayes
Ipswich
Winchester
Folkestone
Maidstone
Dartford
Guildford

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 13 June 2025.
AirlineCheapestAverageFlexibilityOn-time
Scandinavian AirlinesCheapest£300Average£449FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
Norse Atlantic UKCheapest£354Average£506FlexibilityNo cancel feeOn-timeN/A
Search Norse Atlantic UK flights
KLMCheapest£378Average£521FlexibilityNo cancel feeOn-time75%
Search KLM flights
Virgin AtlanticCheapest£381Average£619FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
TAP AIR PORTUGALCheapest£386Average£402FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
Air FranceCheapest£388Average£530FlexibilityNo cancel feeOn-time77%
Search Air France flights
LufthansaCheapest£413Average£671FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
IberiaCheapest£422Average£536FlexibilityNo cancel feeOn-time77%
Search Iberia flights
British AirwaysCheapest£425Average£620FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Air CanadaCheapest£429Average£604FlexibilityNo 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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