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Cheap flights from California to London Heathrow Airport from £145

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 30/1. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — LHR
4 Jan — 11 Jan1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from California to Heathrow

Enter your travel dates to find the best prices.

Cheapest flights from California to Heathrow
Explore the most affordable flight options available from California to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 5 December 2025.

Wed 10/1212:50SFO - LHR
Nonstop10h 35mUnited Airlines
Fri 9/110:00LHR - SFO
1 stop20h 59mUnited Airlines
Deal found 2/12£444
Wed 10/1216:30SFO - LHR
Nonstop10h 10mDelta
Thu 18/1217:20LHR - SFO
1 stop22h 10mDelta
Deal found 4/12£444
Tue 30/1220:40SFO - LHR
Nonstop10h 30mBritish Airways
Mon 26/115:25LHR - SFO
Nonstop11h 20mBritish Airways
Deal found 2/12£445
Thu 4/1216:15SFO - LHR
1 stop13h 15mLufthansa
Thu 11/1207:30LHR - SFO
1 stop16h 25mLufthansa
Deal found 3/12£446
Tue 9/1212:50SFO - LHR
Nonstop10h 35mLufthansa
Tue 16/1210:05LHR - SFO
Nonstop11h 15mLufthansa
Deal found 2/12£447
Wed 31/1209:53SNA - LHR
1 stop16h 07mDelta
Fri 9/117:20LHR - SNA
1 stop23h 56mDelta
Deal found 4/12£447
Wed 10/1210:40SFO - LHR
1 stop16h 15mDelta
Fri 9/120:00LHR - SFO
1 stop22h 45mDelta
Deal found 2/12£447
Wed 10/1213:29ONT - LHR
1 stop12h 31mDelta
Wed 24/1210:45LHR - ONT
1 stop19h 48mDelta
Deal found 3/12£448
Mon 8/1207:00BUR - LHR
1 stop19h 00mDelta
Wed 24/1210:45LHR - BUR
1 stop19h 07mDelta
Deal found 1/12£448
Tue 30/1210:43LAS - LHR
1 stop18h 47mMultiple Airlines
Tue 27/114:30LHR - LAS
2 stops17h 29mMultiple Airlines
Deal found 3/12£448
Wed 3/1213:30SFO - LHR
1 stop18h 20mLufthansa
Wed 10/1206:35LHR - SFO
2 stops17h 20mLufthansa
Deal found 3/12£449
Tue 30/1212:00SFO - LHR
2 stops35h 10mAustrian Airlines
Sat 10/108:00LHR - SFO
1 stop19h 55mAustrian Airlines
Deal found 3/12£450

Find flight deals from California to Heathrow

Keep the following information in mind while searching for California to Heathrow flight deals. Data was last updated 5 December 2025.

Round-trip from

£425

One-way from

£145

Popular in

December

Cheapest in

September

Average price

£775

Good round-trip deal

£488 or less

Good one-way deal

£288 or less
Air Canada
  • Air Canada
  • 18/1-25/1
  • 2 total stops
  • 44h 20m total
  • California to London
Search Deals
30/1
  • 30/1
  • 3 total stops
  • 57h 35m total
  • California to London
Search Deals
Highest demand for flights based on searches. 13% potential increase in price (£63 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£17 potential savings vs. average return price).
Search Deals
Average for round-trip flights in December 2025
Search Deals
Price to beat on a round-trip flight from California to London Heathrow.
Search Deals
Price to beat on a one-way flight from California to London Heathrow.
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from California to Heathrow 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 5 December 2025.
Use the filters below to find and compare flights from California to London Heathrow Airport that are best for you.

Fly from

California

Fly to

Heathrow

Route

Depart

Return

Price

Santa AnaLondon

SNA - LHR

SNALHR

Santa Ana J. Wayne/Orange Cnty

Mon 2/2

08:05-08:15

1 stop16h 10m

London Heathrow

Thu 19/2

14:10-21:32

1 stop15h 22m

£447

Santa AnaLondon

SNA - LHR

SNALHR

Santa Ana J. Wayne/Orange Cnty

Wed 31/12

09:53-10:00

1 stop16h 07m

London Heathrow

Fri 9/1

17:20-09:16

1 stop23h 56m

£447

Santa AnaLondon

SNA - LHR

SNALHR

Santa Ana J. Wayne/Orange Cnty

Wed 31/12

08:00-07:05

1 stop15h 05m

London Heathrow

Fri 9/1

11:05-20:32

1 stop17h 27m

£447

Las VegasLondon

LAS - LHR

LASLHR

Las Vegas Harry Reid Intl

Wed 4/2

13:10-21:40

2 stops24h 30m

London Heathrow

Mon 9/2

06:40-20:55

2 stops22h 15m

£449

OaklandLondon

OAK - LHR

OAKLHR

Oakland

Tue 13/1

05:55-10:00

1 stop20h 05m

London Heathrow

Tue 20/1

17:50-16:14

2 stops30h 24m

£449

Las VegasLondon

LAS - LHR

LASLHR

Las Vegas Harry Reid Intl

Wed 21/1

09:40-17:40

2 stops24h 00m

London Heathrow

Thu 29/1

06:40-22:16

2 stops23h 36m

£449

Las VegasLondon

LAS - LHR

LASLHR

Las Vegas Harry Reid Intl

Wed 4/3

13:55-17:40

2 stops19h 45m

London Heathrow

Mon 16/3

10:20-23:12

2 stops19h 52m

£449

Las VegasLondon

LAS - LHR

LASLHR

Las Vegas Harry Reid Intl

Wed 11/3

07:00-09:20

2 stops19h 20m

London Heathrow

Mon 16/3

06:40-21:59

2 stops22h 19m

£449

San JoseLondon

SJC - LHR

SJCLHR

San Jose

Sun 18/1

18:00-16:50

1 stop14h 50m

London Heathrow

Sun 25/1

06:30-16:20

2 stops17h 50m

£452

San JoseLondon

SJC - LHR

SJCLHR

San Jose

Mon 12/1

09:15-16:50

1 stop23h 35m

London Heathrow

Mon 2/2

06:30-22:12

2 stops23h 42m

£452

Flights are sorted by cheapest return flights first.

Deals found on 2/12

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

Have a flexible travel schedule? Discover the best time to fly to Heathrow 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 Heathrow Airport

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

Currently, December is the cheapest month in which you can book a flight from California to London Heathrow Airport (average of £352). Flying from California to London Heathrow Airport in June is currently the most expensive (average of £524). 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 LHR?

Find hourly flight availability from California to Heathrow. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 5 December 2025.

A simple way to save on the total cost of your ticket is to fly from California to London Heathrow Airport at midday. If you’re flexible enough to do this you can expect to save up to 10% on your trip compared to booking a flight in the morning.

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

Use this chart to determine the cheapest time to fly return from California to Heathrow. Price data was last updated on 16 December 2024.

Travellers seeking maximum savings on their California to London Heathrow Airport flight should consider departing on Wednesday evenings when fares are most often at their lowest. Saturday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from California to London Heathrow Airport

Explore weekly flight availability from California to Heathrow. 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 5 December 2025.

The most flights from USCA to LHR are scheduled on a Monday (46 on average). You will have fewer flight options on Friday, which is when the least amount of flights are scheduled (45 on average).

Related info for your journey

Find useful and relevant information for your journey from California to Heathrow. 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 Heathrow Airport?

    For as low as £447, British Airways can have you in London Heathrow Airport from California in 15h 05m. Airlines will cover a distance of 5437 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

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

    The cheapest airline one-way is TAP AIR PORTUGAL, with whom users have recently found tickets for as low as £121. However, be on the lookout for offers from Scandinavian Airlines and JetBlue, as they are both options that can get you from California to London Heathrow Airport for a low price.

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

    Most travelers choose Los Angeles - London Heathrow, San Francisco - London Heathrow or San Diego - London Heathrow when deciding on the best route from California to London Heathrow Airport.

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

    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 California to London Heathrow Airport on time: Air Canada (90%), Austrian Airlines (90%), United Airlines (90%).

  • What are the cheapest flights from California to London Heathrow Airport?

    Looking for the cheapest flight from California to London Heathrow Airport? While on average our users pay £1,307, our data indicates the cheapest price to be £291. The most popular route (Los Angeles - London Heathrow), is priced around £318.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from California to Heathrow 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 Heathrow Airport?

    Currently, December is the cheapest month in which you can book a flight from California to London Heathrow Airport (average of £352). Flying from California to London Heathrow Airport in June is currently the most expensive (average of £524). 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 Heathrow Airport?

Book flights to London Heathrow Airport if you plan to visit one of these locations
Milton Keynes
Croydon
Northampton
Hounslow
Slough
Gatwick
Luton
Ilford
Wembley
Colchester
Brentford
Watford
Hayes
Crawley
Deal
Winchester
Swindon
Romford
Bedford
Chichester

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for California to Heathrow

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 Heathrow

Discover the top 10 airlines that operate flights from California to Heathrow. 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 5 December 2025.
AirlineCheapestAverageFlexibilityOn-time
Scandinavian AirlinesCheapest£306Average£454FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
TAP AIR PORTUGALCheapest£317Average£573FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
KLMCheapest£367Average£530FlexibilityNo cancel feeOn-time75%
Search KLM flights
LufthansaCheapest£370Average£537FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Virgin AtlanticCheapest£371Average£566FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
Aer LingusCheapest£378Average£513FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
British AirwaysCheapest£389Average£610FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Air FranceCheapest£396Average£602FlexibilityNo cancel feeOn-time77%
Search Air France flights
United AirlinesCheapest£398Average£587FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
FinnairCheapest£407Average£557FlexibilityNo 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 Heathrow?

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to Heathrow from California today with Cheapflights!

Why should you use Cheapflights to find cheap flight tickets from California to Heathrow?

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from California to Heathrow.

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

Yes! Cheapflights helps users easily find flights from California to Heathrow with no change fees.

Can Cheapflights notify me if prices for flights from California to Heathrow become cheaper?

Of course! You can now track prices for flights from California to Heathrow and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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