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

For as low as £408, Scandinavian Airlines can have you in London Heathrow Airport from California in 15h 10m. Airlines will cover a distance of 5469 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 WestJet, with whom users have recently found tickets for as low as £190. However, be on the lookout for offers from JetBlue and TAP AIR PORTUGAL, 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 £1,229, our data indicates the cheapest price to be £262. The most popular route (Los Angeles - London Heathrow), is priced around £353.

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 (94%), Air France (94%), Delta (94%).

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: Air France, Finnair or British Airways.

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

Travelers have found it’s best to book a flight 32 days in advance to save up to 23% compared to booking the same week of travel. As your travel date approaches, the cost of this flight route may potentially increase. While opting to book 32 days out may not be an option for all, there are still additional ways to secure a deal in the near future. You might find a flight from California to London Heathrow Airport 1-2 weeks in advance for as low as £512, or £633 for flights within the next 24 hours.

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

September is one of the best times of the year to fly to London Heathrow Airport from California. Prices for September average £525 per person but you can even find prices for as low as £298. The most expensive prices can be found in the month of December. Opting for a September flight can save you 39% on your journey compared to booking in December

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.

£134+ Flights from California to London Heathrow Airport

Q: 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 £428 and £590 in October. The cheapest return flight price found within the last 3 days was £369 on TAP AIR PORTUGAL (18 Oct-31 Oct).

Cheap flight deals from California to Heathrow

Round-trip from	£369
One-way from	£134
Popular in	December
Cheapest in	September
Average price	£445
Good round-trip deal	£401 or less
Good one-way deal	£295 or less

TAP AIR PORTUGAL
18/10-31/10
2 total stops
48h 25m total
California to London

Search Deals

TAP AIR PORTUGAL
5/10
1 total stop
17h 05m total
California to London

Search Deals

Highest demand for flights based on searches. 12% potential increase in price (£54 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 3% potential price decrease (£14 potential savings vs. average return price).

Search Deals

Average for round-trip flights in September 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

Find flight deals from California to Heathrow

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 15 September 2025.

Sat 18/1016:40LAX - LHR

1 stop21h 20mTAP AIR PORTUGAL

Fri 31/1019:55LHR - LAX

1 stop27h 05mTAP AIR PORTUGAL

Deal found 14/9£369

Fri 24/1016:40LAX - LHR

1 stop21h 20mTAP AIR PORTUGAL

Fri 31/1019:55LHR - LAX

1 stop27h 05mTAP AIR PORTUGAL

Deal found 13/9£370

Sun 19/1016:40LAX - LHR

1 stop22h 15mTAP AIR PORTUGAL

Fri 31/1008:15LHR - LAX

1 stop38h 45mTAP AIR PORTUGAL

Deal found 13/9£375

Tue 23/907:30LAX - LHR

2 stops18h 05mAustrian Airlines

Tue 7/1006:00LHR - LAX

1 stop15h 05mAustrian Airlines

Deal found 14/9£377

Tue 11/1116:45LAX - LHR

1 stop16h 45mTAP AIR PORTUGAL

Mon 17/1118:30LHR - LAX

1 stop28h 30mTAP AIR PORTUGAL

Deal found 14/9£378

Wed 29/1006:35SJC - LHR

1 stop16h 50mVirgin Atlantic

Wed 5/1110:45LHR - SJC

1 stop18h 46mVirgin Atlantic

Deal found 14/9£380

Sat 18/1016:40LAX - LHR

1 stop18h 10mTAP AIR PORTUGAL

Sat 1/1106:00LHR - LAX

1 stop17h 00mTAP AIR PORTUGAL

Deal found 13/9£383

Mon 13/1015:30SFO - LHR

2 stops18h 10mScandinavian Airlines

Mon 10/1106:40LHR - SFO

1 stop15h 55mScandinavian Airlines

Deal found 14/9£383

Wed 19/1117:45LAX - LHR

Nonstop10h 35mIberia

Tue 25/1111:50LHR - LAX

Nonstop11h 30mIberia

Deal found 12/9£384

Sun 21/908:30SFO - LHR

1 stop14h 00mMultiple Airlines

Tue 7/1020:05LHR - SFO

1 stop28h 05mMultiple Airlines

Deal found 13/9£385

Thu 6/1116:45LAX - LHR

1 stop34h 40mTAP AIR PORTUGAL

Mon 17/1118:30LHR - LAX

1 stop28h 30mTAP AIR PORTUGAL

Deal found 14/9£386

Sun 21/920:15LAX - LHR

1 stop15h 10mAer Lingus

Tue 7/1012:00LHR - LAX

1 stop14h 25mAer Lingus

Deal found 13/9£386

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 15 September 2025.

Mon 20/1015:30SFO - LHR

2 stops18h 10mScandinavian Airlines

Thu 30/1007:05LHR - SFO

2 stops19h 20mScandinavian Airlines

Deal found 13/9£404

Tue 30/906:15SAN - LHR

1 stop19h 35mDelta

Tue 7/1006:30LHR - SAN

1 stop13h 30mDelta

Deal found 14/9£408

Wed 1/1011:03SAN - LHR

1 stop16h 17mVirgin Atlantic

Mon 13/1019:15LHR - SAN

1 stop24h 45mVirgin Atlantic

Deal found 13/9£408

Mon 27/1020:00LAX - LHR

Nonstop10h 30mUnited Airlines

Tue 11/1109:00LHR - LAX

1 stop15h 35mUnited Airlines

Deal found 14/9£408

Wed 12/1109:33LAS - LHR

1 stop13h 32mKLM

Tue 18/1108:40LHR - LAS

1 stop13h 35mKLM

Deal found 14/9£416

Mon 27/1012:35BUR - LHR

1 stop13h 00mMultiple Airlines

Fri 7/1110:05LHR - BUR

1 stop18h 21mMultiple Airlines

Deal found 13/9£444

Mon 27/1014:42SNA - LHR

1 stop13h 58mBritish Airways

Fri 7/1110:05LHR - SNA

1 stop17h 58mBritish Airways

Deal found 13/9£444

Wed 22/1012:35SFO - LHR

2 stops21h 05mScandinavian Airlines

Mon 27/1019:50LHR - SFO

2 stops27h 20mScandinavian Airlines

Deal found 14/9£404

Mon 9/219:00LAX - LHR

Nonstop10h 30mUnited Airlines

Fri 20/206:35LHR - LAX

1 stop16h 40mUnited Airlines

Deal found 13/9£412

Wed 1/1021:10LAS - LHR

Nonstop9h 55mVirgin Atlantic

Wed 22/1006:30LHR - LAS

1 stop20h 05mVirgin Atlantic

Deal found 13/9£413

Wed 15/1021:10LAS - LHR

Nonstop9h 55mDelta

Thu 23/1006:30LHR - LAS

1 stop20h 05mDelta

Deal found 13/9£413

Mon 1/1209:40SJC - LHR

1 stop16h 20mKLM

Fri 12/1208:55LHR - SJC

1 stop19h 47mKLM

Deal found 14/9£437

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 15 September 2025.

Sun 8/221:00LAX - LHR

Nonstop10h 30mIberia

Tue 17/216:55LHR - LAX

Nonstop11h 30mIberia

Deal found 13/9£373

Wed 19/1117:45LAX - LHR

Nonstop10h 35mIberia

Tue 25/1111:50LHR - LAX

Nonstop11h 30mIberia

Deal found 12/9£384

Tue 28/1020:00LAX - LHR

Nonstop10h 30mLufthansa

Tue 4/1115:20LHR - LAX

Nonstop11h 25mLufthansa

Deal found 13/9£391

Tue 28/1018:25SFO - LHR

Nonstop10h 35mLufthansa

Tue 4/1110:05LHR - SFO

Nonstop11h 15mLufthansa

Deal found 13/9£401

Tue 28/1020:00LAX - LHR

Nonstop10h 30mUnited Airlines

Tue 4/1115:20LHR - LAX

Nonstop11h 25mUnited Airlines

Deal found 13/9£402

Mon 29/916:40LAX - LHR

Nonstop10h 30mUnited Airlines

Wed 15/1013:05LHR - LAX

Nonstop11h 10mUnited Airlines

Deal found 15/9£403

Fri 14/1119:30LAX - LHR

Nonstop10h 30mIberia

Tue 25/1116:55LHR - LAX

Nonstop11h 30mIberia

Deal found 14/9£405

Wed 29/1017:35LAX - LHR

Nonstop10h 20mVirgin Atlantic

Wed 5/1117:20LHR - LAX

Nonstop11h 20mVirgin Atlantic

Deal found 14/9£408

Tue 4/1118:00SAN - LHR

Nonstop10h 35mBritish Airways

Thu 13/1112:50LHR - SAN

Nonstop11h 20mBritish Airways

Deal found 15/9£410

Mon 6/1016:40SAN - LHR

Nonstop10h 45mAmerican Airlines

Wed 22/1011:30LHR - SAN

Nonstop11h 20mAmerican Airlines

Deal found 14/9£412

Wed 3/1220:55LAS - LHR

Nonstop9h 55mBritish Airways

Tue 9/1216:05LHR - LAS

Nonstop10h 45mBritish Airways

Deal found 13/9£414

Tue 7/1021:20SFO - LHR

Nonstop10h 20mVirgin Atlantic

Tue 14/1016:25LHR - SFO

Nonstop11h 05mVirgin Atlantic

Deal found 12/9£414

Last-minute flights from California to Heathrow
Discover last-minute flight deals from California to Heathrow. Data last updated 15 September 2025 and is based on user searches.

Sun 21/908:30SFO - LHR

1 stop14h 00mMultiple Airlines

Tue 7/1020:05LHR - SFO

1 stop28h 05mMultiple Airlines

Deal found 13/9£385

Sun 21/920:15LAX - LHR

1 stop15h 10mAer Lingus

Tue 7/1012:00LHR - LAX

1 stop14h 25mAer Lingus

Deal found 13/9£386

Tue 23/907:30LAX - LHR

2 stops18h 05mAustrian Airlines

Tue 7/1006:00LHR - LAX

1 stop15h 05mAustrian Airlines

Deal found 14/9£377

Mon 6/1011:50LAX - LHR

1 stop14h 10mMultiple Airlines

Mon 13/1020:05LHR - LAX

1 stop28h 25mMultiple Airlines

Deal found 14/9£389

Mon 13/1015:30SFO - LHR

2 stops18h 10mScandinavian Airlines

Mon 10/1106:40LHR - SFO

1 stop15h 55mScandinavian Airlines

Deal found 14/9£383

Sat 18/1016:40LAX - LHR

1 stop21h 20mTAP AIR PORTUGAL

Fri 31/1019:55LHR - LAX

1 stop27h 05mTAP AIR PORTUGAL

Deal found 14/9£369

Sat 18/1016:40LAX - LHR

1 stop17h 05mTAP AIR PORTUGAL

Thu 30/1006:00LHR - LAX

1 stop16h 40mTAP AIR PORTUGAL

Deal found 13/9£383

Sun 19/1016:40LAX - LHR

1 stop22h 15mTAP AIR PORTUGAL

Fri 31/1008:15LHR - LAX

1 stop38h 45mTAP AIR PORTUGAL

Deal found 13/9£375

Fri 24/1016:40LAX - LHR

1 stop21h 20mTAP AIR PORTUGAL

Fri 31/1019:55LHR - LAX

1 stop27h 05mTAP AIR PORTUGAL

Deal found 13/9£370

Fri 24/1016:40LAX - LHR

1 stop17h 05mTAP AIR PORTUGAL

Sat 1/1106:00LHR - LAX

1 stop17h 00mTAP AIR PORTUGAL

Deal found 14/9£379

Wed 29/1017:35SFO - LHR

1 stop34h 50mTAP AIR PORTUGAL

Sat 8/1106:00LHR - SFO

1 stop16h 45mTAP AIR PORTUGAL

Deal found 13/9£388

Thu 30/1017:45LAX - LHR

1 stop20h 50mTAP AIR PORTUGAL

Thu 6/1106:00LHR - LAX

1 stop16h 40mTAP AIR PORTUGAL

Deal found 15/9£380

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 15 September 2025.

Sun 5/1016:40LAX - LHR

1 stop17h 05mTAP AIR PORTUGAL

Deal found 13/9£134

Sat 11/1016:40LAX - LHR

1 stop22h 15mTAP AIR PORTUGAL

Deal found 14/9£135

Fri 10/1016:40LAX - LHR

1 stop17h 05mTAP AIR PORTUGAL

Deal found 14/9£142

Tue 30/916:40LAX - LHR

1 stop21h 20mTAP AIR PORTUGAL

Deal found 13/9£147

Sat 27/916:40LAX - LHR

1 stop33h 40mTAP AIR PORTUGAL

Deal found 14/9£152

Mon 8/1210:50LAX - LHR

3 stops42h 00mMultiple Airlines

Deal found 13/9£155

Fri 5/1210:50LAX - LHR

3 stops42h 00mMultiple Airlines

Deal found 13/9£156

Mon 10/1110:50LAX - LHR

3 stops42h 00mMultiple Airlines

Deal found 13/9£161

Wed 15/1019:45LAX - LHR

1 stop34h 30mMultiple Airlines

Deal found 12/9£162

Fri 7/1110:50LAX - LHR

3 stops42h 00mMultiple Airlines

Deal found 13/9£163

Thu 2/1017:46SMF - LHR

2 stops39h 59mMultiple Airlines

Deal found 13/9£169

Thu 16/1018:16SMF - LHR

2 stops39h 29mMultiple Airlines

Deal found 14/9£174

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

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Mon 20/10

15:30-17:40

2 stops18h 10m

London Heathrow

Thu 30/10

07:05-19:25

2 stops19h 20m

£404

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Wed 22/10

12:35-17:40

2 stops21h 05m

London Heathrow

Mon 27/10

19:50-16:10

2 stops27h 20m

£404

San DiegoLondon

SAN - LHR

SANLHR

San Diego

Tue 30/9

06:15-09:50

1 stop19h 35m

London Heathrow

Tue 7/10

06:30-12:00

1 stop13h 30m

£408

San DiegoLondon

SAN - LHR

SANLHR

San Diego

Wed 1/10

11:03-11:20

1 stop16h 17m

London Heathrow

Mon 13/10

19:15-12:00

1 stop24h 45m

£408

Los AngelesLondon

LAX - LHR

LAXLHR

Los Angeles

Mon 27/10

20:00-13:30

Nonstop10h 30m

London Heathrow

Tue 11/11

09:00-16:35

1 stop15h 35m

£408

Los AngelesLondon

LAX - LHR

LAXLHR

Los Angeles

Mon 9/2

19:00-13:30

Nonstop10h 30m

London Heathrow

Fri 20/2

06:35-15:15

1 stop16h 40m

£412

Las VegasLondon

LAS - LHR

LASLHR

Las Vegas Harry Reid Intl

Wed 1/10

21:10-15:05

Nonstop9h 55m

London Heathrow

Wed 22/10

06:30-18:35

1 stop20h 05m

£413

Las VegasLondon

LAS - LHR

LASLHR

Las Vegas Harry Reid Intl

Wed 15/10

21:10-15:05

Nonstop9h 55m

London Heathrow

Thu 23/10

06:30-18:35

1 stop20h 05m

£413

Las VegasLondon

LAS - LHR

LASLHR

Las Vegas Harry Reid Intl

Tue 14/10

21:10-15:05

Nonstop9h 55m

London Heathrow

Wed 22/10

06:30-18:35

1 stop20h 05m

£413

Las VegasLondon

LAS - LHR

LASLHR

Las Vegas Harry Reid Intl

Wed 3/12

20:45-14:40

Nonstop9h 55m

London Heathrow

Tue 9/12

08:40-14:15

1 stop13h 35m

£413

Flights are sorted by cheapest return flights first.

Deals found on 13/9

Showing 1-10 of 60 results

...

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, January is the cheapest month in which you can book a flight from California to London Heathrow Airport (average of £112). Flying from California to London Heathrow Airport in August is currently the most expensive (average of £164). 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?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from California to London Heathrow Airport as you normally would.

Weekly flight availability from California to London Heathrow Airport

The most flights from USCA to LHR are scheduled on a Monday (56 on average). You will have fewer flight options on Tuesday, 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?

Related info for your journey

How long is the flight from California to London Heathrow Airport?
For as low as £408, Scandinavian Airlines can have you in London Heathrow Airport from California in 15h 10m. Airlines will cover a distance of 5469 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 WestJet, with whom users have recently found tickets for as low as £190. However, be on the lookout for offers from JetBlue and TAP AIR PORTUGAL, 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 (94%), Air France (94%), Delta (94%).
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 £1,229, our data indicates the cheapest price to be £262. The most popular route (Los Angeles - London Heathrow), is priced around £353.
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, January is the cheapest month in which you can book a flight from California to London Heathrow Airport (average of £112). Flying from California to London Heathrow Airport in August is currently the most expensive (average of £164). 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

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Gatwick

Northampton

Luton

Deal

Wembley

Ilford

Crawley

Hayes

Watford

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Ipswich

Swindon

Dartford

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Brentford

Browse thousands of different options on Cheapflights for your next trip

Top 10 airlines flying from California to Heathrow

Airline	Cheapest	Average	Flexibility	On-time
Scandinavian Airlines	Cheapest£301	Average£442	FlexibilityNo cancel fee	On-time77%	Search Scandinavian Airlines flights
Lufthansa	Cheapest£316	Average£614	FlexibilityNo cancel fee	On-time76%	Search Lufthansa flights
Virgin Atlantic	Cheapest£365	Average£631	FlexibilityNo cancel fee	On-time72%	Search Virgin Atlantic flights
KLM	Cheapest£366	Average£501	FlexibilityNo cancel fee	On-time75%	Search KLM flights
Aer Lingus	Cheapest£372	Average£504	FlexibilityNo cancel fee	On-timeN/A	Search Aer Lingus flights
British Airways	Cheapest£383	Average£594	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
TAP AIR PORTUGAL	Cheapest£387	Average£402	FlexibilityNo cancel fee	On-timeN/A	Search TAP AIR PORTUGAL flights
Air France	Cheapest£389	Average£554	FlexibilityNo cancel fee	On-time77%	Search Air France flights
United Airlines	Cheapest£413	Average£644	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights
Finnair	Cheapest£415	Average£688	FlexibilityNo cancel fee	On-time76%	Search Finnair 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.

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Cheap flights from California to London Heathrow Airport from £134

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 5/10. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from California to Heathrow

Keep the following information in mind while searching for California to Heathrow flight deals. Data was last updated 15 September 2025.

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Good round-trip deal

Good one-way deal

Find 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 15 September 2025.

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 15 September 2025.

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

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?

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 15 September 2025.

Weekly flight availability from California to London Heathrow Airport

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?

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?

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Alternative routes for California to Heathrow

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Top 10 airlines flying from California to Heathrow

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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 15 September 2025.