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Cheap flights from California to London Heathrow Airport from £249

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 28/9. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — LHR
3 May — 10 May1
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 3 April 2026.

Tue 21/416:45
SFO
-
LHR
2 stops39h 40m
Scandinavian Airlines
Fri 24/409:55
LHR
-
SFO
2 stops36h 45m
Scandinavian Airlines
Deal found 30/3£494
Fri 24/420:20
SFO
-
LHR
1 stop17h 40m
TAP AIR PORTUGAL
Thu 30/408:00
LHR
-
SFO
1 stop17h 55m
TAP AIR PORTUGAL
Deal found 2/4£494
Tue 21/416:35
SFO
-
LHR
1 stop18h 15m
TAP AIR PORTUGAL
Tue 2/619:50
LHR
-
SFO
1 stop26h 45m
TAP AIR PORTUGAL
Deal found 2/4£497
Thu 23/419:55
SFO
-
LHR
1 stop30h 25m
TAP AIR PORTUGAL
Thu 30/408:00
LHR
-
SFO
1 stop17h 55m
TAP AIR PORTUGAL
Deal found 30/3£498
Mon 20/413:20
SFO
-
LHR
1 stop16h 00m
Air Canada
Wed 6/509:30
LHR
-
SFO
1 stop19h 32m
Air Canada
Deal found 30/3£500
Sun 19/408:10
SFO
-
LHR
1 stop17h 50m
Air Canada
Fri 8/509:30
LHR
-
SFO
1 stop19h 32m
Air Canada
Deal found 30/3£502
Thu 30/416:45
SFO
-
LHR
2 stops56h 10m
Scandinavian Airlines
Sun 3/518:40
LHR
-
SFO
1 stop28h 00m
Scandinavian Airlines
Deal found 29/3£503
Tue 14/416:35
SFO
-
LHR
1 stop18h 15m
TAP AIR PORTUGAL
Fri 8/506:00
LHR
-
SFO
1 stop18h 50m
TAP AIR PORTUGAL
Deal found 29/3£503
Wed 22/408:10
SFO
-
LHR
1 stop14h 20m
Air Canada
Thu 7/512:05
LHR
-
SFO
1 stop17h 05m
Air Canada
Deal found 30/3£504
Mon 17/816:45
SFO
-
LHR
2 stops36h 10m
Scandinavian Airlines
Thu 20/810:35
LHR
-
SFO
2 stops36h 05m
Scandinavian Airlines
Deal found 2/4£505
Sun 19/408:30
SFO
-
LHR
1 stop16h 05m
Air Canada
Thu 7/512:05
LHR
-
SFO
1 stop17h 05m
Air Canada
Deal found 30/3£507
Thu 1/1016:45
SFO
-
LHR
1 stop15h 15m
Scandinavian Airlines
Sun 11/1019:30
LHR
-
SFO
1 stop27h 10m
Scandinavian Airlines
Deal found 31/3£508

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 3 April 2026.

Round-trip from

£494

One-way from

£249

Popular in

December

Cheapest in

September

Average price

£534

Good round-trip deal

£497 or less

Good one-way deal

£331 or less
Scandinavian Airlines
  • Scandinavian Airlines
  • 21/4-24/4
  • 4 total stops
  • 76h 25m total
  • California to London
Search Deals
Air Canada
  • Air Canada
  • 28/9
  • 2 total stops
  • 33h 50m total
  • California to London
Search Deals
Highest demand for flights based on searches. 13% potential increase in price (£62 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 April 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 3 April 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

Sun 19/4

16:35-11:10

Nonstop10h 35m

London Heathrow

Thu 14/5

07:25-14:30

1 stop15h 05m

£641

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Mon 11/5

17:55-12:15

Nonstop10h 20m

London Heathrow

Thu 21/5

06:30-11:45

1 stop13h 15m

£643

San DiegoLondon

SAN - LHR

SANLHR

San Diego

Tue 15/9

10:00-17:40

2 stops23h 40m

London Heathrow

Tue 6/10

07:05-23:45

3 stops24h 40m

£651

San JoseLondon

SJC - LHR

SJCLHR

San Jose

Wed 5/8

16:30-17:35

1 stop17h 05m

London Heathrow

Wed 2/9

06:30-16:15

2 stops17h 45m

£652

OaklandLondon

OAK - LHR

OAKLHR

Oakland

Wed 15/4

12:34-10:00

1 stop13h 26m

London Heathrow

Tue 28/4

06:30-16:24

2 stops17h 54m

£652

OaklandLondon

OAK - LHR

OAKLHR

Oakland

Tue 14/4

12:34-11:00

1 stop14h 26m

London Heathrow

Tue 28/4

06:30-16:24

2 stops17h 54m

£652

OaklandLondon

OAK - LHR

OAKLHR

Oakland

Tue 14/4

12:34-11:00

1 stop14h 26m

London Heathrow

Wed 29/4

06:30-16:24

2 stops17h 54m

£652

San DiegoLondon

SAN - LHR

SANLHR

San Diego

Wed 16/9

10:00-18:30

2 stops24h 30m

London Heathrow

Wed 7/10

06:40-23:45

3 stops25h 05m

£653

San JoseLondon

SJC - LHR

SJCLHR

San Jose

Wed 22/4

16:00-17:35

1 stop17h 35m

London Heathrow

Thu 30/4

11:45-22:15

2 stops18h 30m

£653

San JoseLondon

SJC - LHR

SJCLHR

San Jose

Wed 15/4

16:00-15:00

1 stop15h 00m

London Heathrow

Fri 1/5

08:40-20:37

2 stops19h 57m

£653

Flights are sorted by cheapest return flights first.

Deals found on 2/4

Showing 1-10 of 60 resultsSorted by cheapest first
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6

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 £355). Flying from California to London Heathrow Airport in June is currently the most expensive (average of £528). 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 3 April 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 15% 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 28 March 2026.

Travellers seeking maximum savings on their California to London Heathrow Airport flight should consider departing on Monday evenings 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 3 April 2026.

The most flights from USCA to LHR are scheduled on a Monday (50 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (33 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 £643, United Airlines 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 £123. However, be on the lookout for offers from JetBlue and United Airlines, 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 Ontario - 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 £1,450, our data indicates the cheapest price to be £264. The most popular route (Los Angeles - London Heathrow), is priced around £425.

  • 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 £355). Flying from California to London Heathrow Airport in June is currently the most expensive (average of £528). 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
Gatwick
Slough
Ilford
Luton
Hayes
Brentford
Colchester
Guildford
Watford
Kingston upon Thames
Romford
Eastbourne
Swindon
Bedford
Chelmsford

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 3 April 2026.
AirlineCheapestAverageFlexibilityOn-time
TAP AIR PORTUGALCheapest£240Average£486FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
LufthansaCheapest£324Average£539FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Virgin AtlanticCheapest£374Average£552FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
KLMCheapest£375Average£631FlexibilityNo cancel feeOn-time75%
Search KLM flights
Aer LingusCheapest£382Average£501FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
FinnairCheapest£387Average£684FlexibilityNo cancel feeOn-time76%
Search Finnair flights
British AirwaysCheapest£392Average£605FlexibilityNo cancel feeOn-time70%
Search British Airways flights
United AirlinesCheapest£401Average£568FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
IberiaCheapest£443Average£652FlexibilityNo cancel feeOn-time77%
Search Iberia flights
Air FranceCheapest£467Average£999FlexibilityNo cancel feeOn-time77%
Search Air France 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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