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Cheap flights from California to London from £175

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 2/2. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — LON
6 Feb — 13 Feb1
1 adult
1 adult, Economy, 0 bags

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 7 January 2026.

Round-trip from

£421

One-way from

£175

Popular in

December

Cheapest in

September

Average price

£541

Good round-trip deal

£446 or less

Good one-way deal

£284 or less
British Airways
  • British Airways
  • 24/2-3/3
  • 3 total stops
  • 46h 29m total
  • California to London
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WestJet
  • WestJet
  • 2/2
  • 1 total stop
  • 16h 15m total
  • California to London
Search Deals
Highest demand for flights based on searches. 13% potential increase in price (£60 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£16 potential savings vs. average return price).
Search Deals
Average for round-trip flights in January 2026
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Price to beat on a round-trip flight from California to London (LON).
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Price to beat on a one-way flight from California to London (LON).
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Find flight deals from California to London

Enter your travel dates to find the best prices.

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 7 January 2026.

Tue 13/110:58ONT - LHR
1 stop13h 37mIberia
Tue 20/120:50LHR - ONT
2 stops33h 58mIberia
Deal found 6/1£427
Wed 1/410:56ONT - LHR
1 stop12h 59mBritish Airways
Tue 7/419:10LHR - ONT
2 stops33h 56mBritish Airways
Deal found 6/1£433
Tue 20/115:09ONT - LHR
1 stop13h 06mBritish Airways
Tue 17/211:45LHR - ONT
1 stop16h 00mBritish Airways
Deal found 6/1£435
Wed 25/214:39ONT - LHR
1 stop13h 01mBritish Airways
Tue 3/311:45LHR - ONT
1 stop16h 00mBritish Airways
Deal found 6/1£440
Sun 18/112:41ONT - LHR
1 stop14h 59mDelta
Tue 3/212:30LHR - ONT
1 stop16h 35mDelta
Deal found 6/1£443
Fri 20/320:10SFO - LGW
1 stop30h 40mTAP AIR PORTUGAL
Thu 2/410:35LGW - SFO
1 stop38h 15mTAP AIR PORTUGAL
Deal found 5/1£446
Thu 15/116:40SFO - LHR
1 stop17h 50mScandinavian Airlines
Sun 25/118:40LHR - SFO
1 stop27h 55mScandinavian Airlines
Deal found 6/1£446
Sun 11/119:25SFO - LGW
1 stop14h 25mSWISS
Tue 27/118:40LGW - SFO
1 stop29h 50mSWISS
Deal found 5/1£447
Wed 18/318:30SFO - LHR
Nonstop10h 30mBritish Airways
Tue 31/308:55LHR - SFO
1 stop16h 11mBritish Airways
Deal found 6/1£447
Mon 13/419:35SFO - LGW
1 stop14h 15mSWISS
Thu 23/409:25LGW - SFO
1 stop14h 50mSWISS
Deal found 6/1£447
Sun 1/216:40SFO - STN
2 stops18h 50mMultiple Airlines
Sun 15/211:55STN - SFO
2 stops34h 40mMultiple Airlines
Deal found 5/1£447
Wed 7/122:40SFO - LHR
Nonstop10h 10mVirgin Atlantic
Tue 20/115:45LHR - SFO
1 stop28h 05mVirgin Atlantic
Deal found 5/1£447

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 7 January 2026.
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 25/2

17:02-13:15

1 stop12h 13m

London Heathrow

Fri 6/3

16:30-23:59

1 stop15h 29m

£450

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Sun 22/2

17:02-13:15

1 stop12h 13m

London Heathrow

Wed 4/3

11:45-19:45

1 stop16h 00m

£450

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Sun 15/3

17:30-10:40

Nonstop10h 10m

London Heathrow

Wed 8/4

12:45-15:45

Nonstop11h 00m

£451

San FranciscoLondon

SFO - LGW

SFOLGW

San Francisco

Wed 11/2

16:35-09:50

1 stop33h 15m

London Gatwick

Wed 18/2

09:35-16:05

2 stops62h 30m

£452

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Sat 28/2

12:50-07:25

Nonstop10h 35m

London Heathrow

Sat 7/3

06:35-14:50

1 stop16h 15m

£455

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Wed 11/3

13:50-07:25

Nonstop10h 35m

London Heathrow

Fri 20/3

06:35-20:35

1 stop21h 00m

£455

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Tue 17/2

17:25-12:00

Nonstop10h 35m

London Heathrow

Mon 23/2

07:40-19:35

1 stop19h 55m

£455

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Wed 6/5

07:00-06:25

1 stop15h 25m

London Heathrow

Tue 9/6

09:50-15:50

1 stop14h 00m

£455

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Sat 28/2

16:30-10:40

Nonstop10h 10m

London Heathrow

Sun 8/3

06:30-11:50

1 stop13h 20m

£456

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Mon 23/2

16:30-10:40

Nonstop10h 10m

London Heathrow

Sat 7/3

06:30-11:50

1 stop13h 20m

£456

Flights are sorted by cheapest return flights first.

Deals found on 4/1

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, October is the cheapest month in which you can book a flight from California to London (average of £164). Flying from California to London in June is currently the most expensive (average of £417). 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 7 January 2026.

It’s typically best to fly out from California to London in the afternoon. Doing so could potentially save you 23% on the flight price compared to flying at midday, which is usually more expensive.

What is the cheapest day to fly from California to London?

Use this chart to determine the cheapest time to fly return from California to London. Price data was last updated on 3 January 2026.

Travellers seeking maximum savings on their California to London flight should consider departing on Tuesday afternoons when fares are most often at their lowest. Monday at midday flights should be avoided if possible as fares are typically the most expensive at this time.

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 7 January 2026.

The most flights from USCA to LON are scheduled on a Tuesday (39 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (33 on average).

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.

  • How long is the flight from California to London?

    Departing from California to London will take you 10h 10m. Airlines will cover a distance of 5350 mi. This flight may include one or multiple stops.

  • 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 £120 on TAP AIR PORTUGAL. Other airlines that offer cheap prices include Norse Atlantic UK from £126 and Scandinavian Airlines from £169 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 Gatwick.

  • 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 (92%), Austrian Airlines (92%), United Airlines( 92%).

  • What are the cheapest flights from California to London?

    Looking for the cheapest flight from California to London? While on average our users pay £1,379, our data indicates the cheapest price to be £272. The most popular route (Los Angeles - London Heathrow), is priced around £348.

  • 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, October is the cheapest month in which you can book a flight from California to London (average of £164). Flying from California to London in June is currently the most expensive (average of £417). 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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Gatwick
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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 7 January 2026.
AirlineCheapestAverageFlexibilityOn-time
TAP AIR PORTUGALCheapest£313Average£566FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
Scandinavian AirlinesCheapest£353Average£468FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
KLMCheapest£362Average£523FlexibilityNo cancel feeOn-time75%
Search KLM flights
LufthansaCheapest£365Average£505FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Virgin AtlanticCheapest£365Average£540FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
Aer LingusCheapest£373Average£506FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
British AirwaysCheapest£384Average£577FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Air FranceCheapest£390Average£576FlexibilityNo cancel feeOn-time77%
Search Air France flights
United AirlinesCheapest£393Average£559FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
FinnairCheapest£401Average£681FlexibilityNo 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 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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