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 £171. However, be on the lookout for offers from WestJet and Iberia, 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 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 £1,930, our data indicates the cheapest price to be £293. The most popular route (Los Angeles - London Heathrow), is priced around £319.

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 (83%), Austrian Airlines (83%), United Airlines (83%).

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: American Airlines, Air France or Finnair.

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 56 days in advance to save up to 49% 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 56 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 £521, or £709 for flights within the next 24 hours.

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

October is one of the best times of the year to fly to London Heathrow Airport from California. Prices for October average £535 per person but you can even find prices for as low as £324. The most expensive prices can be found in the month of December. Opting for a October flight can save you 33% 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.

£163+ Flights from California to London Heathrow Airport

Cheap flight deals from California to Heathrow

Round-trip from	£385
One-way from	£163
Popular in	December
Cheapest in	October
Average price	£615
Good round-trip deal	£431 or less
Good one-way deal	£278 or less

Delta
12/8-19/8
3 total stops
40h 52m total
California to London

Search Deals

28/7
1 total stop
32h 50m total
California to London

Search Deals

Highest demand for flights based on searches. 9% potential increase in price (£40 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 3% potential price decrease (£13 potential savings vs. average return price).

Search Deals

Average for round-trip flights in June 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 13 June 2025.

Mon 8/917:44SJC - LHR

1 stop15h 31mDelta

Thu 2/1011:30LHR - SJC

2 stops18h 16mDelta

Deal found 12/6£385

Wed 15/1011:29ONT - LHR

1 stop15h 51mDelta

Tue 11/1106:20LHR - ONT

2 stops18h 57mDelta

Deal found 13/6£385

Wed 20/806:45SNA - LHR

1 stop22h 45mDelta

Fri 29/806:15LHR - SNA

2 stops19h 49mDelta

Deal found 13/6£385

Tue 21/1013:00ONT - LHR

1 stop12h 50mKLM

Wed 29/1009:20LHR - ONT

1 stop17h 22mKLM

Deal found 12/6£391

Tue 8/714:31SJC - LHR

1 stop13h 49mUnited Airlines

Fri 8/814:50LHR - SJC

1 stop14h 12mUnited Airlines

Deal found 11/6£428

Thu 24/716:45LAX - LHR

Nonstop10h 25mUnited Airlines

Tue 5/808:30LHR - LAX

1 stop15h 56mUnited Airlines

Deal found 12/6£437

Mon 28/709:45SNA - LHR

1 stop16h 05mMultiple Airlines

Mon 4/817:25LHR - SNA

1 stop23h 47mMultiple Airlines

Deal found 13/6£438

Wed 17/906:00LAX - LHR

2 stops19h 35mAir Canada

Sun 28/909:30LHR - LAX

2 stops19h 23mAir Canada

Deal found 12/6£439

Tue 15/712:16PSP - LHR

1 stop13h 34mKLM

Fri 25/706:30LHR - PSP

2 stops17h 58mKLM

Deal found 10/6£443

Thu 31/709:10LAX - LHR

1 stop14h 05mDelta

Wed 13/812:25LHR - LAX

1 stop17h 03mDelta

Deal found 13/6£444

Tue 16/915:45SJC - LHR

2 stops33h 50mAir Canada

Tue 23/917:40LHR - SJC

2 stops31h 37mAir Canada

Deal found 12/6£446

Sat 2/816:50LAX - LHR

1 stop13h 00mKLM

Mon 8/906:30LHR - LAX

1 stop13h 20mKLM

Deal found 11/6£447

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 13 June 2025.

Tue 12/806:30SJC - LHR

1 stop23h 00mDelta

Tue 19/806:15LHR - SJC

2 stops17h 52mDelta

Deal found 13/6£385

Tue 21/1013:00ONT - LHR

1 stop12h 50mKLM

Wed 29/1009:20LHR - ONT

1 stop17h 22mKLM

Deal found 12/6£391

Wed 16/714:31SJC - LHR

1 stop13h 49mUnited Airlines

Wed 23/708:30LHR - SJC

1 stop22h 05mUnited Airlines

Deal found 13/6£428

Mon 28/709:45SNA - LHR

1 stop16h 05mMultiple Airlines

Mon 4/817:25LHR - SNA

1 stop23h 47mMultiple Airlines

Deal found 13/6£438

Wed 17/906:00LAX - LHR

2 stops19h 35mAir Canada

Sun 28/909:30LHR - LAX

2 stops19h 23mAir Canada

Deal found 12/6£439

Sun 26/1020:20LAX - LHR

Nonstop10h 40mBritish Airways

Fri 7/1115:05LHR - LAX

Nonstop11h 20mBritish Airways

Deal found 12/6£443

Thu 25/919:35LAX - LHR

1 stop18h 10mSWISS

Fri 3/1008:40LHR - LAX

1 stop15h 50mSWISS

Deal found 11/6£450

Tue 26/806:00OAK - LHR

1 stop19h 50mVirgin Atlantic

Tue 16/912:25LHR - OAK

2 stops19h 28mVirgin Atlantic

Deal found 12/6£454

Sat 23/813:09SJC - LHR

1 stop33h 16mIberia

Wed 17/906:30LHR - SJC

2 stops22h 38mIberia

Deal found 12/6£456

Sun 28/907:30LAX - LHR

2 stops18h 05mAustrian Airlines

Mon 6/1006:00LHR - LAX

1 stop15h 05mAustrian Airlines

Deal found 11/6£462

Thu 21/819:30LAX - LHR

2 stops30h 05mScandinavian Airlines

Fri 29/821:05LHR - LAX

2 stops27h 15mScandinavian Airlines

Deal found 10/6£464

Sun 7/917:30LAX - LHR

1 stop18h 10mLufthansa

Mon 15/907:25LHR - LAX

1 stop15h 50mLufthansa

Deal found 11/6£475

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 13 June 2025.

Sun 6/713:25LAX - LHR

Nonstop10h 35mIberia

Thu 7/816:55LHR - LAX

Nonstop11h 20mIberia

Deal found 11/6£437

Wed 16/716:45LAX - LHR

Nonstop10h 25mUnited Airlines

Fri 25/713:05LHR - LAX

Nonstop11h 05mUnited Airlines

Deal found 11/6£438

Sun 20/720:05LAX - LHR

Nonstop10h 30mBritish Airways

Mon 18/814:20LHR - LAX

Nonstop11h 15mBritish Airways

Deal found 13/6£439

Thu 4/922:50LAX - LHR

Nonstop10h 25mDelta

Sat 15/1110:20LHR - LAX

Nonstop11h 20mDelta

Deal found 12/6£442

Sat 2/822:50LAX - LHR

Nonstop10h 25mVirgin Atlantic

Sun 17/809:55LHR - LAX

Nonstop11h 20mVirgin Atlantic

Deal found 11/6£456

Wed 30/720:05LAX - LHR

Nonstop10h 30mAmerican Airlines

Thu 7/814:20LHR - LAX

Nonstop11h 15mAmerican Airlines

Deal found 12/6£457

Thu 24/722:50LAX - LHR

Nonstop10h 25mKLM

Tue 29/709:55LHR - LAX

Nonstop11h 20mKLM

Deal found 11/6£468

Wed 23/715:30LAX - LHR

Nonstop10h 30mMultiple Airlines

Wed 30/709:55LHR - LAX

Nonstop11h 20mMultiple Airlines

Deal found 11/6£485

Sat 26/715:30LAX - LHR

Nonstop10h 30mAir France

Sat 2/809:55LHR - LAX

Nonstop11h 20mAir France

Deal found 11/6£489

Tue 14/1016:40SAN - LHR

Nonstop10h 45mBritish Airways

Tue 28/1012:50LHR - SAN

Nonstop11h 15mBritish Airways

Deal found 11/6£495

Wed 20/819:50SAN - LHR

Nonstop10h 30mAmerican Airlines

Wed 27/811:30LHR - SAN

Nonstop11h 20mAmerican Airlines

Deal found 13/6£497

Thu 18/916:30SFO - LHR

Nonstop10h 25mBritish Airways

Sun 28/910:45LHR - SFO

Nonstop11h 05mBritish Airways

Deal found 12/6£500

Last-minute flights from California to Heathrow
Discover last-minute flight deals from California to Heathrow. Data last updated 13 June 2025 and is based on user searches.

Tue 17/610:37LAX - LHR

1 stop14h 23mIberia

Fri 8/812:00LHR - LAX

1 stop14h 51mIberia

Deal found 10/6£620

Tue 17/612:35SFO - LHR

2 stops15h 15mMultiple Airlines

Wed 22/1008:40LHR - SFO

2 stops22h 29mMultiple Airlines

Deal found 12/6£685

Tue 17/613:00SFO - LHR

Nonstop10h 25mUnited Airlines

Wed 22/1008:40LHR - SFO

1 stop15h 30mUnited Airlines

Deal found 12/6£705

Wed 18/608:00LAS - LHR

2 stops20h 05mMultiple Airlines

Wed 25/615:05LHR - LAS

2 stops31h 44mMultiple Airlines

Deal found 11/6£718

Thu 19/612:19SFO - LHR

1 stop14h 31mBritish Airways

Thu 31/710:05LHR - SFO

1 stop20h 32mBritish Airways

Deal found 12/6£720

Fri 20/621:55SFO - LHR

Nonstop10h 20mDelta

Thu 7/817:35LHR - SFO

2 stops24h 45mDelta

Deal found 10/6£695

Fri 20/610:05SFO - LHR

1 stop13h 15mIberia

Thu 7/816:25LHR - SFO

1 stop15h 43mIberia

Deal found 10/6£697

Sat 21/612:50SJC - LHR

1 stop14h 45mUnited Airlines

Wed 20/808:30LHR - SJC

2 stops35h 35mUnited Airlines

Deal found 11/6£718

Sat 21/613:13SJC - LHR

1 stop13h 37mIberia

Wed 20/812:00LHR - SJC

1 stop17h 04mIberia

Deal found 11/6£723

Sun 22/615:30LAX - LHR

Nonstop10h 30mDelta

Tue 29/706:15LHR - LAX

1 stop17h 50mDelta

Deal found 11/6£609

Sun 22/616:32LAX - LHR

1 stop12h 18mBritish Airways

Sat 26/710:05LHR - LAX

1 stop16h 26mBritish Airways

Deal found 10/6£670

Mon 23/613:15ONT - LHR

1 stop12h 35mDelta

Tue 22/710:55LHR - ONT

1 stop20h 47mDelta

Deal found 10/6£626

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 13 June 2025.

Mon 28/721:25LAX - LHR

1 stop32h 50mMultiple Airlines

Deal found 11/6£163

Sat 26/716:40LAX - LHR

1 stop18h 10mTAP AIR PORTUGAL

Deal found 11/6£171

Mon 27/1013:00SNA - LHR

1 stop16h 50mWestJet

Deal found 11/6£226

Fri 24/1016:15PSP - LHR

3 stops37h 35mWestJet

Deal found 10/6£228

Wed 30/719:26SMF - LHR

3 stops32h 29mMultiple Airlines

Deal found 11/6£230

Wed 23/706:30SJC - LHR

3 stops25h 05mMultiple Airlines

Deal found 12/6£236

Wed 1/1000:59ONT - LHR

2 stops26h 56mMultiple Airlines

Deal found 11/6£237

Wed 9/719:50LAX - LHR

1 stop16h 15mIberia

Deal found 11/6£248

Wed 16/706:00OAK - LHR

3 stops25h 35mMultiple Airlines

Deal found 11/6£249

Thu 2/1013:35PSP - LHR

3 stops46h 30mMultiple Airlines

Deal found 12/6£250

Wed 10/906:45SNA - LHR

3 stops29h 35mMultiple Airlines

Deal found 11/6£258

Mon 1/1220:45LAX - LHR

3 stops32h 05mWestJet

Deal found 12/6£258

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 JoseLondon

SJC - LHR

SJCLHR

San Jose

Tue 12/8

06:30-13:30

1 stop23h 00m

London Heathrow

Tue 19/8

06:15-16:07

2 stops17h 52m

£385

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Wed 15/10

11:29-11:20

1 stop15h 51m

London Heathrow

Tue 11/11

06:20-17:17

2 stops18h 57m

£385

Santa AnaLondon

SNA - LHR

SNALHR

Santa Ana J. Wayne/Orange Cnty

Wed 20/8

06:45-13:30

1 stop22h 45m

London Heathrow

Fri 29/8

06:15-18:04

2 stops19h 49m

£385

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Tue 21/10

13:00-09:50

1 stop12h 50m

London Heathrow

Wed 29/10

09:20-19:42

1 stop17h 22m

£391

San JoseLondon

SJC - LHR

SJCLHR

San Jose

Tue 2/9

14:31-14:15

1 stop15h 44m

London Heathrow

Thu 11/9

12:25-21:00

1 stop16h 35m

£392

San JoseLondon

SJC - LHR

SJCLHR

San Jose

Wed 16/7

14:31-12:20

1 stop13h 49m

London Heathrow

Wed 23/7

08:30-22:35

1 stop22h 05m

£428

Los AngelesLondon

LAX - LHR

LAXLHR

Los Angeles

Thu 24/7

16:45-11:10

Nonstop10h 25m

London Heathrow

Tue 5/8

08:30-16:26

1 stop15h 56m

£437

Santa AnaLondon

SNA - LHR

SNALHR

Santa Ana J. Wayne/Orange Cnty

Mon 28/7

09:45-09:50

1 stop16h 05m

London Heathrow

Mon 4/8

17:25-09:12

1 stop23h 47m

£438

Los AngelesLondon

LAX - LHR

LAXLHR

Los Angeles

Wed 17/9

06:00-09:35

2 stops19h 35m

London Heathrow

Sun 28/9

09:30-20:53

2 stops19h 23m

£439

San JoseLondon

SJC - LHR

SJCLHR

San Jose

Tue 16/9

15:45-09:35

2 stops33h 50m

London Heathrow

Tue 23/9

17:40-17:17

2 stops31h 37m

£446

Flights are sorted by cheapest return flights first.

Deals found on 11/6

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 (58 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (43 on average).

Rainfall in Heathrow by month

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.

Temperature in Heathrow by month

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).

Reviews of airlines servicing Heathrow

To help decide which airline to fly from California to London, see what other customers have to say about Delta, Alaska Airlines and KLM. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.

Delta

8.0

Very Good

7,950 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Delta

8.0

Very Good

7,950 reviews

Delta

8.0

Very Good

7,950 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Alaska Airlines

8.0

Very Good

10,000 reviews

Delta

8.0

Very Good

7,950 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

KLM

7.8

Good

1,358 reviews

Delta

8.0

Very Good

7,950 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Austrian Airlines

7.6

Good

802 reviews

Delta

8.0

Very Good

7,950 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Finnair

7.6

Good

1,290 reviews

Delta

8.0

Very Good

7,950 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Related info for your journey

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 £171. However, be on the lookout for offers from WestJet and Iberia, 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 (83%), Austrian Airlines (83%), United Airlines (83%).
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 £1,930, our data indicates the cheapest price to be £293. The most popular route (Los Angeles - London Heathrow), is priced around £319.
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

Deal

Hounslow

Croydon

Milton Keynes

Northampton

Gatwick

Luton

Slough

Wembley

Crawley

Eastbourne

Ilford

Southend-on-Sea

Watford

Hayes

Ipswich

Winchester

Folkestone

Maidstone

Swindon

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£300	Average£449	FlexibilityNo cancel fee	On-time77%	Search Scandinavian Airlines flights
KLM	Cheapest£378	Average£521	FlexibilityNo cancel fee	On-time75%	Search KLM flights
Virgin Atlantic	Cheapest£381	Average£619	FlexibilityNo cancel fee	On-time72%	Search Virgin Atlantic flights
TAP AIR PORTUGAL	Cheapest£386	Average£402	FlexibilityNo cancel fee	On-timeN/A	Search TAP AIR PORTUGAL flights
Air France	Cheapest£388	Average£530	FlexibilityNo cancel fee	On-time77%	Search Air France flights
Lufthansa	Cheapest£413	Average£671	FlexibilityNo cancel fee	On-time76%	Search Lufthansa flights
Iberia	Cheapest£422	Average£536	FlexibilityNo cancel fee	On-time77%	Search Iberia flights
British Airways	Cheapest£425	Average£620	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
Air Canada	Cheapest£429	Average£604	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights
American Airlines	Cheapest£437	Average£680	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 £163

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 28/7. 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 13 June 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 13 June 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 13 June 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 13 June 2025.

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 13 June 2025.

Rainfall in Heathrow by month

Plan your trip to Heathrow by taking into account the average rainfall totals by month.

Temperature in Heathrow by month

Plan your trip to Heathrow by taking into account the average temperature totals by month.

Reviews of airlines servicing Heathrow

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.

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 California?

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.

Top 10 airlines flying from California to Heathrow

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?

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 13 June 2025.