How long is the flight from California to London Heathrow Airport?

For as low as £639, Alaska Airlines can have you in London Heathrow Airport from California in 16h 45m. 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 JetBlue and Virgin Atlantic, as they are both options that can get you from California to London Heathrow Airport for a low price.

In terms of precipitation, rainfall in London Heathrow Airport 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 Heathrow Airport when rainfall is around 40.0 mm.

If weather is an important factor for your trip to London Heathrow Airport, 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).

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 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 £1,372, our data indicates the cheapest price to be £232. The most popular route (Los Angeles - London Heathrow), is priced around £451.

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: SAUDIA (96%), SriLankan Airlines (92%), Air Canada (92%).

What are the most popular airlines that fly from California to London Heathrow Airport?

Before booking your flight from California to London Heathrow Airport check out the most popular airlines for this route: Virgin Atlantic, British Airways or United Airlines.

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.

£211+ Cheap Flights from California to London Heathrow Airport

Cheap flight deals from California to Heathrow

Enter your travel dates to find the best prices.

Cheapest

Best

Direct

Last-minute

One-way

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 10 August 2026.

Wed 18/1119:30 -

1 stop18h 10m

Thu 26/1110:20 -

1 stop14h 40m

Deal found 7/8£451

Sun 4/1017:05 -

Nonstop10h 30m

Tue 2/310:05 -

Nonstop11h 20m

Deal found 9/8£474

Fri 25/910:20 -

1 stop23h 25m

Mon 28/918:10 -

1 stop22h 10m

Deal found 8/8£476

Mon 21/916:30 -

1 stop18h 20m

Tue 6/1019:50 -

1 stop26h 45m

Deal found 7/8£477

Tue 22/910:20 -

1 stop23h 25m

Thu 24/918:10 -

1 stop22h 10m

Deal found 10/8£479

Mon 21/916:30 -

1 stop22h 25m

Tue 29/913:45 -

1 stop32h 50m

Deal found 7/8£479

Sun 22/1109:20 -

1 stop22h 30m

Sat 28/1117:10 -

1 stop22h 10m

Deal found 7/8£483

Fri 25/910:20 -

1 stop23h 25m

Thu 1/1018:10 -

1 stop22h 10m

Deal found 6/8£486

Tue 22/910:20 -

1 stop23h 25m

Sat 10/1018:10 -

1 stop22h 10m

Deal found 7/8£487

Fri 9/1010:20 -

1 stop23h 25m

Sat 7/1118:00 -

1 stop21h 20m

Deal found 5/8£488

Mon 21/916:30 -

1 stop17h 15m

Mon 28/918:45 -

1 stop26h 50m

Deal found 6/8£488

Tue 20/1010:20 -

1 stop23h 25m

Thu 5/1117:10 -

1 stop22h 10m

Deal found 9/8£489

Best flights from California to Heathrow
Discover carefully curated flight deals from California to Heathrow that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 10 August 2026.

Mon 21/916:45 -

1 stop16h 55m

Tue 6/1019:50 -

2 stops26h 50m

Deal found 6/8£635

Mon 23/1109:55 -

2 stops16h 45m

Fri 27/1106:30 -

1 stop13h 15m

Deal found 7/8£639

Sun 15/1107:00 -

1 stop21h 20m

Wed 18/1114:45 -

1 stop15h 54m

Deal found 5/8£651

Tue 6/1012:55 -

Nonstop10h 30m

Wed 14/1007:25 -

1 stop15h 05m

Deal found 6/8£660

Sat 26/923:35 -

1 stop13h 10m

Fri 2/1011:55 -

1 stop18h 02m

Deal found 9/8£664

Sun 10/109:29 -

1 stop18h 46m

Wed 13/109:35 -

2 stops18h 58m

Deal found 9/8£674

Wed 23/918:02 -

1 stop13h 33m

Wed 30/911:15 -

1 stop18h 49m

Deal found 9/8£693

Wed 3/218:00 -

Nonstop10h 40m

Sun 7/212:45 -

Nonstop11h 25m

Deal found 8/8£704

Tue 22/915:07 -

2 stops18h 43m

Tue 29/920:05 -

1 stop27h 45m

Deal found 8/8£719

Sun 13/913:21 -

1 stop14h 54m

Sun 27/908:55 -

1 stop15h 44m

Deal found 8/8£756

Sun 25/1012:18 -

1 stop13h 42m

Mon 16/1110:50 -

1 stop15h 41m

Deal found 5/8£779

Sun 13/922:39 -

2 stops34h 01m

Tue 29/918:00 -

2 stops34h 57m

Deal found 10/8£925

Sun 10/107:00 -

1 stop21h 20m

Wed 13/114:45 -

1 stop15h 13m

Deal found 9/8£651

Sun 22/1123:59 -

1 stop23h 06m

Tue 1/1206:30 -

1 stop13h 15m

Deal found 9/8£657

Tue 22/923:35 -

1 stop13h 10m

Mon 28/911:55 -

1 stop17h 17m

Deal found 9/8£664

Wed 4/1111:12 -

1 stop16h 03m

Thu 19/1109:00 -

2 stops20h 59m

Deal found 8/8£671

Fri 4/1217:10 -

Nonstop10h 25m

Thu 10/1206:20 -

1 stop14h 40m

Deal found 10/8£674

Fri 25/906:23 -

2 stops23h 12m

Tue 6/1019:50 -

2 stops26h 50m

Deal found 8/8£677

Sun 10/115:02 -

1 stop13h 18m

Wed 13/114:45 -

1 stop15h 45m

Deal found 9/8£651

Wed 14/1021:00 -

Nonstop10h 25m

Mon 19/1015:05 -

Nonstop11h 20m

Deal found 8/8£719

Wed 7/1023:15 -

Nonstop10h 20m

Wed 14/1006:30 -

1 stop16h 15m

Deal found 7/8£660

Tue 22/923:35 -

1 stop13h 10m

Fri 2/1008:15 -

1 stop21h 42m

Deal found 9/8£664

Tue 22/913:30 -

1 stop15h 45m

Tue 29/917:25 -

Nonstop10h 45m

Deal found 8/8£734

Tue 10/1116:08 -

1 stop33h 32m

Tue 1/1214:30 -

1 stop32h 51m

Deal found 7/8£679

Wed 7/1016:45 -

1 stop14h 20m

Tue 13/1012:55 -

1 stop15h 37m

Deal found 6/8£687

Mon 21/906:10 -

2 stops19h 25m

Mon 5/1007:05 -

2 stops21h 45m

Deal found 6/8£699

Tue 22/919:40 -

Nonstop10h 40m

Tue 6/1014:25 -

1 stop15h 21m

Deal found 8/8£724

Fri 25/922:39 -

1 stop14h 06m

Thu 1/1011:55 -

1 stop17h 02m

Deal found 8/8£664

Tue 22/920:41 -

1 stop12h 54m

Wed 30/909:55 -

2 stops18h 15m

Deal found 9/8£671

Tue 1/1210:00 -

1 stop14h 25m

Fri 18/1211:35 -

1 stop13h 50m

Deal found 8/8£683

Find flight deals from California to Heathrow

Round-trip from	£451
One-way from	£211
Popular in	June
Cheapest in	September
Average price	£638
Good round-trip deal	£660 or less
Good one-way deal	£294 or less

Scandinavian Airlines
18/11-26/11
2 total stops
32h 50m total
California to London

Search Deals

11/11
3 total stops
31h 00m total
California to London

Search Deals

Highest demand for flights based on searches. 21% potential increase in price (£125 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 3% potential price decrease (£16 potential savings vs. average return price).

Search Deals

Average for round-trip flights in August 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

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 San Francisco - LHR London Heathrow

SFOLHR

San Francisco

Mon 21/9

16:45-17:40

1 stop16h 55m

London Heathrow

Tue 6/10

19:50-14:40

2 stops26h 50m

£635

San FranciscoLondon

SFO San Francisco - LHR London Heathrow

SFOLHR

San Francisco

Mon 23/11

09:55-10:40

2 stops16h 45m

London Heathrow

Fri 27/11

06:30-11:45

1 stop13h 15m

£639

OaklandLondon

OAK Oakland - LHR London Heathrow

OAKLHR

Oakland

Sun 15/11

07:00-12:20

1 stop21h 20m

London Heathrow

Wed 18/11

14:45-22:39

1 stop15h 54m

£651

BurbankLondon

BUR Burbank Bob Hope - LHR London Heathrow

BURLHR

Burbank Bob Hope

Sun 10/1

07:00-12:20

1 stop21h 20m

London Heathrow

Wed 13/1

14:45-21:58

1 stop15h 13m

£651

Santa AnaLondon

SNA Santa Ana J. Wayne/Orange Cnty - LHR London Heathrow

SNALHR

Santa Ana J. Wayne/Orange Cnty

Sun 10/1

15:02-12:20

1 stop13h 18m

London Heathrow

Wed 13/1

14:45-22:30

1 stop15h 45m

£651

San FranciscoLondon

SFO San Francisco - LHR London Heathrow

SFOLHR

San Francisco

Sun 22/11

23:59-07:05

1 stop23h 06m

London Heathrow

Tue 1/12

06:30-11:45

1 stop13h 15m

£657

San FranciscoLondon

SFO San Francisco - LHR London Heathrow

SFOLHR

San Francisco

Tue 6/10

12:55-07:25

Nonstop10h 30m

London Heathrow

Wed 14/10

07:25-14:30

1 stop15h 05m

£660

Los AngelesLondon

LAX Los Angeles - LHR London Heathrow

LAXLHR

Los Angeles

Wed 7/10

23:15-17:35

Nonstop10h 20m

London Heathrow

Wed 14/10

06:30-14:45

1 stop16h 15m

£660

SacramentoLondon

SMF Sacramento Intl - LHR London Heathrow

SMFLHR

Sacramento Intl

Sat 26/9

23:35-20:45

1 stop13h 10m

London Heathrow

Fri 2/10

11:55-21:57

1 stop18h 02m

£664

SacramentoLondon

SMF Sacramento Intl - LHR London Heathrow

SMFLHR

Sacramento Intl

Tue 22/9

23:35-20:45

1 stop13h 10m

London Heathrow

Mon 28/9

11:55-21:12

1 stop17h 17m

£664

Flights are sorted by cheapest return flights first.

Deals found on 5/8

Showing 1-10 of 60 resultsSorted by cheapest first

...

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.

SFO-LHR

OAK-LHR

SMF-LHR

BUR-LHR

SNA-LHR

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

USCA-LHR

SFO-LHR

OAK-LHR

SMF-LHR

BUR-LHR

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 £498). Flying from California to London Heathrow Airport in June is currently the most expensive (average of £1,026). 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?

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 13% on your trip compared to booking a flight in the evening.

Weekly flight availability from California to London Heathrow Airport

The most flights from USCA to LHR are scheduled on a Monday (57 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (52 on average).

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

Airfare is below average for this route at the moment.

California to London Heathrow Airport flights typically cost between £571 and £833 in November.
The cheapest return price found within the last 5 days was £451 on Scandinavian Airlines (18 Nov–26 Nov).

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 day to fly from California to London Heathrow Airport?

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

Related info for your journey

How long is the flight from California to London Heathrow Airport?
For as low as £639, Alaska Airlines can have you in London Heathrow Airport from California in 16h 45m. 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 JetBlue and Virgin Atlantic, 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: SAUDIA (96%), SriLankan Airlines (92%), Air Canada (92%).
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 £1,372, our data indicates the cheapest price to be £232. The most popular route (Los Angeles - London Heathrow), is priced around £451.
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 £498). Flying from California to London Heathrow Airport in June is currently the most expensive (average of £1,026). 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

Hounslow

Milton Keynes

Luton

Gatwick

Wembley

Ilford

Slough

Hayes

Croydon

Colchester

Brentford

Eastbourne

Northampton

Watford

Southend-on-Sea

Swindon

Enfield

Kingston upon Thames

Southall

Poole

Browse thousands of different options on Cheapflights for your next trip

Alternative routes

Complete your trip

Direct flights to England

Flights by cabin class

Heathrow flight routes

Other flight options

Popular flights

Top destinations

Alternative routes for California to Heathrow

Newark to Heathrow flights

John F Kennedy Intl to Heathrow flights

Dulles Intl to Heathrow flights

LaGuardia to Heathrow flights

Newark to Gatwick flights

John F Kennedy Intl to Stansted flights

Boston to Heathrow flights

Baltimore to Heathrow flights

John F Kennedy Intl to Gatwick flights

John F Kennedy Intl to London City flights

Los Angeles to Heathrow flights

San Francisco to Heathrow flights

O'Hare Intl to Heathrow flights

LaGuardia to Gatwick flights

Dallas/Fort Worth to Heathrow flights

Seattle to Heathrow flights

Boston to Gatwick flights

Atlanta to Heathrow flights

Newark to London City flights

Newark to Stansted flights

Orlando to Heathrow flights

Reagan-National to Heathrow flights

Miami to Heathrow flights

Dulles Intl to Gatwick flights

Hobby to Heathrow flights

Dulles Intl to London City flights

Newark to Luton flights

Denver to Heathrow flights

Boston to London City flights

Los Angeles to Gatwick flights

Philadelphia to Heathrow flights

Boston to Stansted flights

Los Angeles to Stansted flights

Baltimore to Gatwick flights

George Bush Intcntl to Heathrow flights

San Francisco to Gatwick flights

Reagan-National to Gatwick flights

O'Hare Intl to Gatwick flights

San Francisco to Stansted flights

Los Angeles to London City flights

O'Hare Intl to Stansted flights

San Francisco to London City flights

Charlotte to Heathrow flights

O'Hare Intl to London City flights

Tampa to Heathrow flights

Orlando to Gatwick flights

Minneapolis to Heathrow flights

Raleigh to Heathrow flights

Top 10 airlines flying from California to Heathrow

Airline	Cheapest	Average	Flexibility	On-time
TAP AIR PORTUGAL	Cheapest£236	Average£476	FlexibilityNo cancel fee	On-timeN/A	Search TAP AIR PORTUGAL flights
Lufthansa	Cheapest£370	Average£695	FlexibilityNo cancel fee	On-time76%	Search Lufthansa flights
Finnair	Cheapest£380	Average£717	FlexibilityNo cancel fee	On-time76%	Search Finnair flights
United Airlines	Cheapest£394	Average£786	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights
Virgin Atlantic	Cheapest£403	Average£598	FlexibilityNo cancel fee	On-time72%	Search Virgin Atlantic flights
KLM	Cheapest£452	Average£795	FlexibilityNo cancel fee	On-time75%	Search KLM flights
British Airways	Cheapest£458	Average£740	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
Delta	Cheapest£472	Average£1,027	FlexibilityNo cancel fee	On-timeN/A	Search Delta flights
Air France	Cheapest£546	Average£982	FlexibilityNo cancel fee	On-time77%	Search Air France flights
American Airlines	Cheapest£547	Average£839	FlexibilityNo cancel fee	On-time71%	Search American Airlines flights

Fly with Cheapflights

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.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.

Cheap flights from California to London Heathrow Airport from £211

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 11/11. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from California to Heathrow

Cheapest flights from California to HeathrowExplore 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 10 August 2026.

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 10 August 2026.

Best flights from California to HeathrowDiscover carefully curated flight deals from California to Heathrow that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 10 August 2026.

Discover carefully curated flight deals from California to Heathrow that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 10 August 2026.

Direct flights from California to HeathrowExplore direct flight options from California to Heathrow based on user searches, and compare prices and availability for your desired travel dates. Data last updated 10 August 2026.

Explore direct flight options from California to Heathrow based on user searches, and compare prices and availability for your desired travel dates. Data last updated 10 August 2026.

Last-minute flights from California to HeathrowDiscover last-minute flight deals from California to Heathrow. Data last updated 10 August 2026 and is based on user searches.

Discover last-minute flight deals from California to Heathrow. Data last updated 10 August 2026 and is based on user searches.

One-way flights from California to HeathrowSearch for one-way flight options from California to Heathrow. Find affordable one-way fares based on user searches. Data last updated 10 August 2026.

Search for one-way flight options from California to Heathrow. Find affordable one-way fares based on user searches. Data last updated 10 August 2026.

Find flight deals from California to Heathrow

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Good round-trip deal

Good one-way deal

Cheapflights Fare Finder

Use the filters below to find and compare flights from California to London Heathrow Airport that are best for you.

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.

Cheapflights Insights

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

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 10 August 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 13% on your trip compared to booking a flight in the evening.

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 10 August 2026.

The most flights from USCA to LHR are scheduled on a Monday (57 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (52 on average).

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

Airfare is below average for this route at the moment.

California to London Heathrow Airport flights typically cost between £571 and £833 in November.The cheapest return price found within the last 5 days was £451 on Scandinavian Airlines (18 Nov–26 Nov).

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 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 18 July 2026.

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

Related info for your journey

How long is the flight from California to London Heathrow Airport?

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

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

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

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

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

How can I find direct flights from California to Heathrow?

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

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

Travelling to a place near London Heathrow Airport?

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 Heathrow

See prices for flight routes from nearby airports that may be better suited for you.

Complete your trip

Complete your trip to Heathrow by adding a car hire and/or hotel booking to your travel itinerary.

Direct flights to England

Book a non-stop flight to one of these other cities located in England.

Search flights from California to Heathrow by cabin class

Find flights from California to Heathrow, based on your preferred cabin class, be it economy, premium economy, business, or first class.

Other flights to Heathrow

Explore flights to Heathrow departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 10 August 2026.

California and Heathrow flights

Browse other California and Heathrow flight options. Last updated on 10 August 2026.

Popular flight searches

Check out other popular destinations found by fellow travellers in 2026

California to Heathrow flights

Consider these flights travelling from California to Heathrow.

Top 10 airlines flying from California to Heathrow

Fly with Cheapflights

How does Cheapflights help users find flights from California to Heathrow?

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

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

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

100% Free

Book with Flexibility

Travel Smart

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 10 August 2026.

Best flights from California to Heathrow
Discover carefully curated flight deals from California to Heathrow that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 10 August 2026.

Direct flights from California to Heathrow
Explore direct flight options from California to Heathrow based on user searches, and compare prices and availability for your desired travel dates. Data last updated 10 August 2026.

Last-minute flights from California to Heathrow
Discover last-minute flight deals from California to Heathrow. Data last updated 10 August 2026 and is based on user searches.

One-way flights from California to Heathrow
Search for one-way flight options from California to Heathrow. Find affordable one-way fares based on user searches. Data last updated 10 August 2026.

California to London Heathrow Airport flights typically cost between £571 and £833 in November.
The cheapest return price found within the last 5 days was £451 on Scandinavian Airlines (18 Nov–26 Nov).