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Cheap flights from California to London Heathrow Airport from £243

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 31/8. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — LHR
4 Jun — 11 Jun1
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 May 2026.

Tue 6/1016:45
SFO
-
LHR
1 stop15h 15m
Scandinavian Airlines
Tue 20/1019:50
LHR
-
SFO
2 stops26h 50m
Scandinavian Airlines
Deal found 1/5£564
Thu 24/916:45
SFO
-
LHR
1 stop15h 15m
Scandinavian Airlines
Mon 28/919:50
LHR
-
SFO
2 stops26h 50m
Scandinavian Airlines
Deal found 4/5£564
Wed 30/916:45
SFO
-
LHR
1 stop32h 35m
Scandinavian Airlines
Sun 11/1019:50
LHR
-
SFO
2 stops26h 50m
Scandinavian Airlines
Deal found 1/5£565
Wed 4/1116:40
SFO
-
LHR
2 stops32h 55m
Scandinavian Airlines
Sat 7/1106:40
LHR
-
SFO
2 stops21h 38m
Scandinavian Airlines
Deal found 3/5£566
Wed 7/1016:45
SFO
-
LHR
1 stop15h 15m
Scandinavian Airlines
Tue 13/1006:40
LHR
-
SFO
1 stop16h 00m
Scandinavian Airlines
Deal found 2/5£566
Tue 22/916:45
SFO
-
LHR
1 stop20h 55m
Scandinavian Airlines
Thu 1/1006:40
LHR
-
SFO
1 stop16h 00m
Scandinavian Airlines
Deal found 30/4£567
Mon 21/916:45
SFO
-
LHR
1 stop16h 55m
Scandinavian Airlines
Tue 29/919:50
LHR
-
SFO
2 stops26h 50m
Scandinavian Airlines
Deal found 4/5£568
Mon 21/916:45
SFO
-
LHR
1 stop15h 15m
Scandinavian Airlines
Tue 20/1019:50
LHR
-
SFO
2 stops26h 50m
Scandinavian Airlines
Deal found 1/5£569
Tue 18/816:45
SFO
-
LHR
2 stops20h 50m
Scandinavian Airlines
Wed 14/1006:40
LHR
-
SFO
1 stop16h 00m
Scandinavian Airlines
Deal found 1/5£569
Tue 18/816:45
SFO
-
LHR
1 stop17h 45m
Scandinavian Airlines
Mon 31/819:50
LHR
-
SFO
2 stops26h 50m
Scandinavian Airlines
Deal found 2/5£570
Thu 5/1119:30
LAX
-
LHR
2 stops17h 50m
Scandinavian Airlines
Tue 10/1107:05
LHR
-
LAX
2 stops17h 55m
Scandinavian Airlines
Deal found 3/5£571
Tue 15/916:45
SFO
-
LHR
1 stop15h 15m
Scandinavian Airlines
Wed 23/921:05
LHR
-
SFO
2 stops25h 35m
Scandinavian Airlines
Deal found 3/5£571

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 May 2026.

Round-trip from

£564

One-way from

£243

Popular in

December

Cheapest in

September

Average price

£547

Good round-trip deal

£599 or less

Good one-way deal

£248 or less
Scandinavian Airlines
  • Scandinavian Airlines
  • 29/10-9/11
  • 2 total stops
  • 33h 45m total
  • California to London
Search Deals
Air Canada
  • Air Canada
  • 31/8
  • 2 total stops
  • 33h 50m total
  • California to London
Search Deals
Highest demand for flights based on searches. 12% potential increase in price (£58 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 May 2026
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 May 2026.
Use the filters below to find and compare flights from California to London Heathrow Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Wed 16/9

17:55-12:15

Nonstop10h 20m

London Heathrow

Wed 23/9

06:30-11:45

1 stop13h 15m

£629

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Wed 2/9

17:55-12:15

Nonstop10h 20m

London Heathrow

Tue 8/9

06:30-11:45

1 stop13h 15m

£629

SacramentoLondon

SMF - LHR

SMFLHR

Sacramento Intl

Mon 10/8

19:03-11:10

1 stop32h 07m

London Heathrow

Wed 26/8

15:05-17:23

1 stop34h 18m

£651

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Thu 20/8

13:05-07:25

Nonstop10h 20m

London Heathrow

Mon 24/8

16:25-14:20

1 stop29h 55m

£659

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Tue 22/9

16:45-11:10

Nonstop10h 25m

London Heathrow

Sat 10/10

07:30-19:50

1 stop20h 20m

£659

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Mon 3/8

22:00-06:25

1 stop24h 25m

London Heathrow

Thu 20/8

06:30-21:52

2 stops23h 22m

£661

BurbankLondon

BUR - LHR

BURLHR

Burbank Bob Hope

Sat 22/8

16:13-20:40

2 stops20h 27m

London Heathrow

Tue 8/9

07:25-17:33

2 stops18h 08m

£665

BurbankLondon

BUR - LHR

BURLHR

Burbank Bob Hope

Sat 22/8

14:00-06:25

1 stop32h 25m

London Heathrow

Wed 9/9

09:55-21:42

2 stops19h 47m

£666

San JoseLondon

SJC - LHR

SJCLHR

San Jose

Mon 31/8

18:37-10:00

2 stops31h 23m

London Heathrow

Mon 7/9

08:30-12:04

2 stops35h 34m

£674

San DiegoLondon

SAN - LHR

SANLHR

San Diego

Thu 13/8

14:00-13:15

1 stop15h 15m

London Heathrow

Thu 20/8

06:30-11:50

1 stop13h 20m

£677

Flights are sorted by cheapest return flights first.

Deals found on 30/4

Showing 1-10 of 60 resultsSorted by cheapest first
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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

How far ahead should I book a flight from California to London Heathrow Airport?

The price you pay for your flight from California to London Heathrow Airport may vary depending on when you book. For the best chance of a lower fare, look to book 14 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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

Currently, February is the cheapest month in which you can book a flight from California to London Heathrow Airport (average of £475). Flying from California to London Heathrow Airport in December is currently the most expensive (average of £763). 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 May 2026.

A simple way to save on the total cost of your ticket is to fly from California to London Heathrow Airport in the morning. If you’re flexible enough to do this you can expect to save up to 5% on your trip compared to booking a flight at midday.

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 2 May 2026.

Travellers seeking maximum savings on their California to London Heathrow Airport flight should consider departing on Tuesday at midday 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 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 May 2026.

The most flights from USCA to LHR are scheduled on a Monday (54 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (50 on average).

How much does it cost for a return flight from California to London Heathrow Airport?

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 £629, Delta can have you in London Heathrow Airport from California in 10h 20m. Airlines will cover a distance of 5350 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 £120. However, be on the lookout for offers from United Airlines and British Airways, 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: KLM (90%), Air France (90%), Delta (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 £1,560, our data indicates the cheapest price to be £346. The most popular route (Los Angeles - London Heathrow), is priced around £521.

  • 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, February is the cheapest month in which you can book a flight from California to London Heathrow Airport (average of £475). Flying from California to London Heathrow Airport in December is currently the most expensive (average of £763). 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
Wembley
Croydon
Northampton
Hounslow
Luton
Gatwick
Ilford
Slough
Hayes
Brentford
Colchester
Romford
Watford
Kingston upon Thames
Eastbourne
Swindon
Ipswich
Southend-on-Sea
Guildford

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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Philadelphia to Heathrow flights
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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 May 2026.
AirlineCheapestAverageFlexibilityOn-time
TAP AIR PORTUGALCheapest£235Average£474FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
LufthansaCheapest£316Average£503FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Virgin AtlanticCheapest£365Average£551FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
KLMCheapest£366Average£659FlexibilityNo cancel feeOn-time75%
Search KLM flights
Aer LingusCheapest£372Average£489FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
FinnairCheapest£378Average£667FlexibilityNo cancel feeOn-time76%
Search Finnair flights
British AirwaysCheapest£383Average£591FlexibilityNo cancel feeOn-time70%
Search British Airways flights
United AirlinesCheapest£384Average£557FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
DeltaCheapest£470Average£1,099FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
American AirlinesCheapest£471Average£672FlexibilityNo cancel feeOn-time71%
Search American Airlines 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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