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Cheap flights from London to California from £274

This is the cheapest return flight price found by a momondo user in the last 72 hours by searching for a flight from London to California departing on 11/2. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Cheap return flights

Enter your travel dates to find the best prices.
United Airlines Logo
12:05 - 21:58
LHR
-
ONT
17h 53m1 stop
United Airlines Logo
08:00 - 10:15
ONT
-
LHR
18h 15m1 stop
£274United Airlines
Wed, 11 Feb - Wed, 25 Feb
United Airlines Logo
07:30 - 21:58
LHR
-
ONT
22h 28m2 stops
United Airlines Logo
05:05 - 09:40
ONT
-
LHR
20h 35m1 stop
£347United Airlines
Thu, 22 Jan - Mon, 26 Jan
United Airlines Logo
09:30 - 22:53
LHR
-
ONT
21h 23m2 stops
United Airlines Logo
13:45 - 20:35
ONT
-
LHR
22h 50m2 stops
£347United Airlines
Thu, 5 Feb - Thu, 12 Feb
United Airlines Logo
07:30 - 21:58
LHR
-
ONT
22h 28m2 stops
United Airlines Logo
13:53 - 07:25
ONT
-
LHR
33h 32m1 stop
£348United Airlines
Thu, 22 Jan - Mon, 26 Jan
Virgin Atlantic Logo
15:05 - 22:51
LHR
-
ONT
15h 46m1 stop
Virgin Atlantic Logo
13:10 - 10:00
ONT
-
LHR
12h 50m1 stop
£364Virgin Atlantic
Sat, 31 Jan - Mon, 16 Feb
KLM Logo
08:40 - 14:45
LHR
-
LAX
14h 05m1 stop
KLM Logo
23:15 - 17:35
LAX
-
LHR
10h 20mdirect
£367KLM
Tue, 31 Mar - Thu, 9 Jul
British Airways Logo
10:45 - 13:50
LHR
-
SFO
11h 05mdirect
British Airways Logo
16:35 - 11:00
SFO
-
LHR
10h 25mdirect
£404British Airways
Wed, 1 Apr - Tue, 14 Apr
Virgin Atlantic Logo
20:55 - 11:45
LHR
-
SFO
22h 50m1 stop
Virgin Atlantic Logo
12:00 - 13:05
SFO
-
LHR
17h 05m1 stop
£405Virgin Atlantic
Thu, 14 May - Fri, 29 May
British Airways Logo
14:20 - 17:30
LHR
-
SFO
11h 10mdirect
British Airways Logo
16:35 - 11:00
SFO
-
LHR
10h 25mdirect
£411British Airways
Wed, 8 Apr - Thu, 16 Apr
Lufthansa Logo
08:30 - 20:07
LHR
-
LAS
19h 37m2 stops
Lufthansa Logo
21:10 - 22:10
LAS
-
LHR
17h 00m1 stop
£441Lufthansa
Wed, 10 Jun - Wed, 17 Jun

Finnair flights from London to California

Our best Finnair deals on London to California flight tickets
Finnair
13 Jan
LHR08:20London Heathrow
16h 46m
1 stop
LAX17:06Los Angeles
18 Jan
LAX17:30Los Angeles
10h 35m
LHR12:05London Heathrow
£382
Finnair
3 Jul
LGW10:45London Gatwick
19h 20m
1 stop
LAX22:05Los Angeles
20 Jul
LAX10:52Los Angeles
15h 18m
1 stop
LGW10:10London Gatwick
£388
Finnair
25 Jun
LGW10:45London Gatwick
19h 20m
1 stop
LAX22:05Los Angeles
7 Jul
LAX10:52Los Angeles
15h 48m
1 stop
LGW10:40London Gatwick
£389

Air Canada flights from London to California

Our best Air Canada deals on London to California flight tickets
Air Canada
20 Jan
LHR18:00London Heathrow
32h 47m
2 stops
LAX18:47Los Angeles
29 Jan
LAX11:30Los Angeles
13h 00m
1 stop
LHR08:30London Heathrow
£368
Air Canada
15 Jan
LHR14:30London Heathrow
29h 18m
1 stop
LAX11:48Los Angeles
28 Jan
LAX08:30Los Angeles
18h 50m
2 stops
LHR11:20London Heathrow
£375
Air Canada
20 Mar
LHR13:25London Heathrow
15h 35m
1 stop
LAX22:00Los Angeles
29 Mar
LAX07:35Los Angeles
15h 00m
1 stop
LHR06:35London Heathrow
£380

momondo Fare Finder

 
Customise your flight search to find flights from London to California 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, momondo users made 279,928 searches. Data last updated 9 January 2026.
Use the filters below to find and compare flights from London to California that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 11/2

12:05-21:58

1 stop17h 53m

Ontario

Wed 25/2

08:00-10:15

1 stop18h 15m

£274

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Thu 22/1

07:30-21:58

2 stops22h 28m

Ontario

Mon 26/1

05:05-09:40

1 stop20h 35m

£347

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Thu 5/2

09:30-22:53

2 stops21h 23m

Ontario

Thu 12/2

13:45-20:35

2 stops22h 50m

£347

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Thu 22/1

07:30-21:58

2 stops22h 28m

Ontario

Mon 26/1

13:53-07:25

1 stop33h 32m

£348

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Sat 31/1

15:05-22:51

1 stop15h 46m

Ontario

Mon 16/2

13:10-10:00

1 stop12h 50m

£364

LondonLos Angeles

LHR - LAX

LHRLAX

London Heathrow

Tue 31/3

08:40-14:45

1 stop14h 05m

Los Angeles

Thu 9/7

23:15-17:35

Nonstop10h 20m

£367

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Wed 1/4

10:45-13:50

Nonstop11h 05m

San Francisco

Tue 14/4

16:35-11:00

Nonstop10h 25m

£404

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Thu 14/5

20:55-11:45

1 stop22h 50m

San Francisco

Fri 29/5

12:00-13:05

1 stop17h 05m

£405

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Wed 8/4

14:20-17:30

Nonstop11h 10m

San Francisco

Thu 16/4

16:35-11:00

Nonstop10h 25m

£411

LondonLas Vegas

LHR - LAS

LHRLAS

London Heathrow

Wed 10/6

08:30-20:07

2 stops19h 37m

Las Vegas Harry Reid Intl

Wed 17/6

21:10-22:10

1 stop17h 00m

£441

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

See travel insights to California from

How to get the cheapest flight ticket from London to California

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to California?

If you are unable to visit California during the month of September, then departing from London during the month February is also very affordable. Most momondo users find prices during this month for around £411.

What is the cheapest day to depart on your flight to California?

The cheapest day to depart on your flight to California is on a Wednesday when prices can be found for as low as £504. This is often the case because there is less demand to fly during this day of the week. On the other hand, Sunday is the most expensive day to depart from London because it is more convenient for both business and leisure travellers. As a result, prices tend to be around £575.

What is the cheapest time of day to depart on your flight to California?

The cheapest time of day to fly to California is in the morning when flights can be purchased for as low as £509. In contrast, the most expensive time of day to depart to California is in the afternoon when prices are around £559.

What is the cheapest London to California flight route?

Fly from London Gatwick to Los Angeles for the best London - California flight prices

How far in advance should I book a flight to California?

You are more likely to see cheaper flights to California from London when booking weeks ahead of your departure date. In general, you can expect to find flights to California for around £487 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to California from London for as low as £448 on momondo.

What cabin class options are available on London to California flights?

There are 4 cabin classes available to choose from on London to California flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on London to California flights?

No. A direct flight is the cheapest option for a flight between London to California.

Cheap London to California flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from London to California

Best price found

£319

Fastest flight time

10h 40m

Direct flights

Every day

Airports in California

418 airports
The best one-way flight to California from London in the past 72 hours is £319. The best return flight deal from London to California found on momondo in the last 72 hours is £380.
The fastest flight from London to California takes 10h 40m
Direct flights go from London to California every day.
There are 418 airports in California. From London there are direct flights to Las Vegas Harry Reid Intl (LAS).
Search flight deals

  • When did momondo last update prices for flights from London to California?

    Prices for flights from London to California are refreshed on a daily basis.

  • How many operators does momondo search for flights from London to California?

  • How old do you have to be to fly from London to California?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from London to California.

  • What documentation or ID do you need to fly to California?

    The required travel and health documents for your California trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at California. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • What is the most popular plane model from London to California?

Best airlines flying from London to California

Compare and see reviews for airlines that fly from London to California with momondo
Airline
Rating
Free Cancellation
Price
DeltaPriceFrom £237Free CancellationRating
7.9
8,029 reviews
Search Delta flights
IberiaPriceFrom £238Free CancellationRating
7.0
3,076 reviews
Search Iberia flights
SWISSPriceFrom £277Free CancellationRating
7.5
1,840 reviews
Search SWISS flights
FinnairPriceFrom £279Free CancellationRating
7.6
1,346 reviews
Search Finnair flights
Norse Atlantic UKPriceFrom £293Free CancellationRating
7.2
51 reviews
Search Norse Atlantic UK flights
Aer LingusPriceFrom £333Free CancellationRating
7.2
1,429 reviews
Search Aer Lingus flights
Air CanadaPriceFrom £335Free CancellationRating
7.1
10,603 reviews
Search Air Canada flights
United AirlinesPriceFrom £337Free CancellationRating
7.4
9,141 reviews
Search United Airlines flights
Scandinavian AirlinesPriceFrom £338Free CancellationRating
7.3
1,635 reviews
Search Scandinavian Airlines flights
Brussels AirlinesPriceFrom £357Free CancellationRating
7.2
380 reviews
Search Brussels Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from London to California?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from London to California for you.

Can I find flights from London to California with flexible booking policies on momondo?

Flights from London to California with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from London to California?

Once you have performed a search for London to California flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from London to California right now. Can momondo alert me if prices change?

Price alerts on flights to California from London are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

An easier way to manage your California trip

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Find better results for your trip to California

Popular Cities in California

Popular flights according to clicks in the last 7 days on momondo
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