How long is the flight from California to London?

Departing from California to London will take you 16h 20m. Airlines will cover a distance of 5407 mi. This flight may include one or multiple stops.

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

One-way options have recently been found by users for as low as £120 on TAP AIR PORTUGAL. Other airlines that offer cheap prices include Virgin Atlantic from £230 and Alaska Airlines from £239 one-way.

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

If weather is an important factor for your trip to London, 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?

The most popular flight routes from California to London are Los Angeles Los Angeles - London Heathrow, San Francisco - London Heathrow and Los Angeles Los Angeles - London Gatwick.

What are the cheapest flights from California to London?

Looking for the cheapest flight from California to London? While on average our users pay £1,595, our data indicates the cheapest price to be £257. The most popular route (Los Angeles Los Angeles - London Heathrow), is priced around £487.

What are the most reliable airlines from California to London?

Before booking your flight to London from California, check out the most reliable airlines to get you to your destination on time: SAUDIA (90%), Delta (90%), Virgin Atlantic( 90%).

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

When booking a flight from California to London, you may want to consider flying on Virgin Atlantic, British Airways or United Airlines as they are the most popular for this route.

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

Yes. In addition to deals on California to London flights, Cheapflights offers holiday packages that include both flights and hotel.

How can I find direct flights from California to London?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from California to London.

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

Yes. Cheapflights offers flight deals from California to London by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

£205+ Cheap Flights from California to London

Cheap flight deals from California to London

Enter your travel dates to find the best prices.

Cheapest

Best

Direct

Last-minute

One-way

Cheapest flights from California to London
Explore the most affordable flight options available from California to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 9 September 2026.

Mon 26/1006:20 -

1 stop21h 20m

Tue 3/1106:20 -

2 stops24h 23m

Deal found 9/9£546

Sun 4/1007:05 -

1 stop15h 20m

Fri 16/1011:15 -

1 stop15h 06m

Deal found 8/9£551

Sat 3/1018:00 -

1 stop33h 20m

Tue 20/1011:40 -

1 stop19h 03m

Deal found 8/9£555

Wed 14/1014:13 -

1 stop16h 52m

Wed 21/1017:00 -

1 stop25h 17m

Deal found 9/9£556

Mon 5/1014:13 -

1 stop16h 52m

Tue 13/1017:00 -

1 stop25h 17m

Deal found 9/9£557

Sun 20/918:00 -

1 stop13h 35m

Tue 6/1011:40 -

1 stop19h 03m

Deal found 8/9£567

Sun 13/1212:20 -

1 stop15h 20m

Fri 25/1206:20 -

2 stops23h 39m

Deal found 8/9£568

Tue 20/1016:45 -

1 stop17h 00m

Tue 27/1006:00 -

1 stop17h 15m

Deal found 5/9£573

Tue 20/1016:45 -

1 stop33h 00m

Wed 4/1116:35 -

1 stop30h 40m

Deal found 7/9£573

Sun 11/1020:35 -

1 stop16h 10m

Mon 26/1016:55 -

Nonstop11h 15m

Deal found 5/9£574

Fri 16/1010:20 -

2 stops22h 35m

Mon 26/1010:25 -

3 stops28h 55m

Deal found 8/9£574

Mon 12/1016:45 -

2 stops19h 05m

Tue 20/1020:15 -

2 stops26h 30m

Deal found 5/9£574

Best flights from California to London
Discover carefully curated flight deals from California to London that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 9 September 2026.

Sat 3/1018:00 -

1 stop33h 20m

Fri 16/1011:15 -

1 stop15h 06m

Deal found 8/9£555

Fri 26/216:45 -

2 stops32h 50m

Wed 10/306:40 -

1 stop16h 10m

Deal found 6/9£626

Tue 2/318:55 -

Nonstop10h 35m

Fri 5/306:35 -

1 stop16h 40m

Deal found 8/9£637

Mon 12/1013:25 -

1 stop36h 30m

Wed 28/1010:55 -

1 stop37h 40m

Deal found 8/9£637

Mon 12/1019:35 -

1 stop15h 45m

Sun 18/1020:05 -

1 stop28h 25m

Deal found 8/9£651

Tue 13/1013:05 -

1 stop13h 25m

Wed 21/1010:05 -

1 stop13h 11m

Deal found 9/9£654

Wed 25/1116:35 -

1 stop33h 15m

Sat 5/1210:10 -

2 stops60h 35m

Deal found 4/9£654

Tue 19/106:00 -

2 stops17h 15m

Thu 21/117:05 -

1 stop26h 40m

Deal found 8/9£662

Mon 19/1015:28 -

1 stop21h 17m

Wed 21/1008:40 -

1 stop17h 45m

Deal found 6/9£662

Tue 10/1106:00 -

1 stop22h 20m

Fri 13/1114:45 -

1 stop16h 21m

Deal found 8/9£691

Sat 31/1016:20 -

2 stops21h 40m

Mon 9/1119:30 -

2 stops26h 00m

Deal found 5/9£709

Sun 4/1009:50 -

1 stop15h 15m

Tue 20/1014:30 -

Nonstop11h 20m

Deal found 6/9£719

Tue 3/1110:05 -

2 stops16h 45m

Tue 17/1112:15 -

2 stops17h 25m

Deal found 8/9£733

Fri 9/1011:56 -

1 stop19h 39m

Mon 19/1006:30 -

2 stops18h 42m

Deal found 8/9£744

Wed 14/1016:45 -

1 stop14h 00m

Fri 16/1019:45 -

1 stop27h 00m

Deal found 6/9£877

Sat 31/1006:05 -

2 stops21h 50m

Mon 9/1111:55 -

2 stops18h 58m

Deal found 5/9£984

Sat 17/1016:45 -

2 stops19h 10m

Sat 31/1015:35 -

2 stops31h 15m

Deal found 5/9£631

Sun 31/116:40 -

Nonstop10h 35m

Thu 18/211:10 -

1 stop16h 25m

Deal found 4/9£637

Thu 3/1212:45 -

1 stop19h 35m

Wed 9/1210:55 -

1 stop37h 40m

Deal found 8/9£637

Tue 26/107:00 -

2 stops18h 30m

Tue 2/220:05 -

1 stop23h 40m

Deal found 6/9£662

Sun 4/1006:00 -

1 stop19h 30m

Thu 15/1008:40 -

1 stop21h 04m

Deal found 8/9£662

Fri 11/1219:15 -

2 stops29h 05m

Tue 22/1216:35 -

1 stop30h 10m

Deal found 6/9£667

Thu 22/1012:16 -

1 stop16h 59m

Thu 29/1006:30 -

2 stops23h 13m

Deal found 6/9£707

Mon 19/1020:10 -

1 stop29h 45m

Thu 29/1017:25 -

1 stop31h 10m

Deal found 8/9£643

Thu 28/119:10 -

2 stops31h 30m

Sun 7/208:40 -

1 stop15h 55m

Deal found 7/9£710

Mon 12/1016:45 -

1 stop16h 55m

Thu 15/1015:35 -

2 stops31h 05m

Deal found 3/9£646

Wed 4/1118:00 -

Nonstop10h 40m

Tue 10/1112:45 -

Nonstop11h 25m

Deal found 7/9£722

Sun 8/1116:40 -

Nonstop10h 35m

Wed 18/1106:35 -

1 stop16h 15m

Deal found 4/9£659

Mon 14/1216:35 -

1 stop15h 10m

Mon 21/1221:35 -

2 stops49h 10m

Deal found 5/9£671

Tue 20/1006:40 -

2 stops18h 45m

Fri 30/1010:00 -

2 stops21h 43m

Deal found 6/9£678

Find flight deals from California to London

Round-trip from	£551
One-way from	£205
Popular in	June
Cheapest in	February
Average price	£618
Good round-trip deal	£722 or less
Good one-way deal	£339 or less

Delta
4/10-21/10
2 total stops
32h 38m total
California to London

Search Deals

WestJet
7/12-31/12
1 total stop
15h 20m total
California to London

Search Deals

Highest demand for flights based on searches. 18% potential increase in price (£109 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 3% potential price decrease (£15 potential savings vs. average return price).

Search Deals

Average for round-trip flights in September 2026

Search Deals

Price to beat on a round-trip flight from California to London (LON).

Search Deals

Price to beat on a one-way flight from California to London (LON).

Search Deals

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

San DiegoLondon

SAN San Diego - LHR London Heathrow

SANLHR

San Diego

Wed 24/2

08:00-09:00

1 stop17h 00m

London Heathrow

Wed 31/12

00:00-15:00

Nonstop0h 00m

£240

OntarioLondon

ONT Ontario - LHR London Heathrow

ONTLHR

Ontario

Tue 6/10

22:42-20:45

1 stop14h 03m

London Heathrow

Wed 31/12

00:00-15:00

Nonstop0h 00m

£241

San DiegoLondon

SAN San Diego - LHR London Heathrow

SANLHR

San Diego

Sun 7/3

08:00-07:50

1 stop15h 50m

London Heathrow

Wed 31/12

00:00-15:00

Nonstop0h 00m

£243

San DiegoLondon

SAN San Diego - LHR London Heathrow

SANLHR

San Diego

Sat 7/11

21:40-20:55

1 stop15h 15m

London Heathrow

Wed 31/12

00:00-15:00

Nonstop0h 00m

£243

San DiegoLondon

SAN San Diego - LHR London Heathrow

SANLHR

San Diego

Tue 6/10

14:10-13:15

1 stop15h 05m

London Heathrow

Wed 31/12

00:00-15:00

Nonstop0h 00m

£243

San DiegoLondon

SAN San Diego - LHR London Heathrow

SANLHR

San Diego

Thu 25/2

21:05-20:45

1 stop15h 40m

London Heathrow

Wed 31/12

00:00-15:00

Nonstop0h 00m

£243

San DiegoLondon

SAN San Diego - LHR London Heathrow

SANLHR

San Diego

Mon 9/11

21:40-21:40

1 stop16h 00m

London Heathrow

Wed 31/12

00:00-15:00

Nonstop0h 00m

£243

San DiegoLondon

SAN San Diego - LHR London Heathrow

SANLHR

San Diego

Wed 4/11

21:40-21:40

1 stop16h 00m

London Heathrow

Wed 31/12

00:00-15:00

Nonstop0h 00m

£243

San DiegoLondon

SAN San Diego - LHR London Heathrow

SANLHR

San Diego

Tue 3/11

21:40-21:40

1 stop16h 00m

London Heathrow

Wed 31/12

00:00-15:00

Nonstop0h 00m

£243

Los AngelesLondon

LAX Los Angeles Los Angeles - LHR London Heathrow

LAXLHR

Los Angeles Los Angeles

Fri 5/3

16:30-20:35

2 stops20h 05m

London Heathrow

Wed 31/12

00:00-15:00

Nonstop0h 00m

£280

Flights are sorted by cheapest return flights first.

Deals found on 4/9

Showing 1-10 of 60 resultsSorted by cheapest first

...

Best time to book a flight from California to London

Have a flexible travel schedule? Discover the best time to fly to London from California with our price prediction graph.

ONT-LHR

SFO-LHR

LAX-LHR

LAX-STN

SFO-LGW

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

USCA-LON

ONT-LHR

SFO-LHR

LAX-LHR

LAX-STN

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

Currently, February is the cheapest month in which you can book a flight from California to London (average of £493). Flying from California to London in June is currently the most expensive (average of £962). 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 LON?

It’s typically best to fly out from California to London in the morning. Doing so could potentially save you 19% on the flight price compared to flying at midday, which is usually more expensive.

Weekly flight availability from California to London

The most flights from USCA to LON 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 (28 on average).

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

Airfare is typical for this route at the moment.

California to London flights typically cost between £450 and £740 in October.
The cheapest return price found within the last 5 days was £573 on TAP AIR PORTUGAL (20 Oct–27 Oct).

How far ahead should I book a flight from California to London?

Booking 73 days in advance of your planned departure date is, on average, the best time to get cheap flights from California to London. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest day to fly from California to London?

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

Related info for your journey

How long is the flight from California to London?
Departing from California to London will take you 16h 20m. Airlines will cover a distance of 5407 mi. This flight may include one or multiple stops.
What are the cheapest airlines to fly from California to London one-way?
One-way options have recently been found by users for as low as £120 on TAP AIR PORTUGAL. Other airlines that offer cheap prices include Virgin Atlantic from £230 and Alaska Airlines from £239 one-way.
What are the most popular routes from California to London?
The most popular flight routes from California to London are Los Angeles Los Angeles - London Heathrow, San Francisco - London Heathrow and Los Angeles Los Angeles - London Gatwick.
What are the most reliable airlines from California to London?
Before booking your flight to London from California, check out the most reliable airlines to get you to your destination on time: SAUDIA (90%), Delta (90%), Virgin Atlantic( 90%).
What are the cheapest flights from California to London?
Looking for the cheapest flight from California to London? While on average our users pay £1,595, our data indicates the cheapest price to be £257. The most popular route (Los Angeles Los Angeles - London Heathrow), is priced around £487.
Can I find deals for flights from California to London that include hotel bookings?
Yes. In addition to deals on California to London flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from California to London?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from California to London.
Can I find deals for business class flights from California to London?
Yes. Cheapflights offers flight deals from California to London 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?
Currently, February is the cheapest month in which you can book a flight from California to London (average of £493). Flying from California to London in June is currently the most expensive (average of £962). 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.

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Top 10 airlines flying from California to London

Airline	Cheapest	Average	Flexibility	On-time
TAP AIR PORTUGAL	Cheapest£235	Average£475	FlexibilityNo cancel fee	On-timeN/A	Search TAP AIR PORTUGAL flights
Finnair	Cheapest£318	Average£794	FlexibilityNo cancel fee	On-time76%	Search Finnair flights
Lufthansa	Cheapest£392	Average£806	FlexibilityNo cancel fee	On-time76%	Search Lufthansa flights
United Airlines	Cheapest£393	Average£790	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights
KLM	Cheapest£435	Average£797	FlexibilityNo cancel fee	On-time75%	Search KLM flights
Virgin Atlantic	Cheapest£436	Average£630	FlexibilityNo cancel fee	On-time72%	Search Virgin Atlantic flights
British Airways	Cheapest£447	Average£716	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
Delta	Cheapest£471	Average£1,023	FlexibilityNo cancel fee	On-timeN/A	Search Delta flights
American Airlines	Cheapest£558	Average£892	FlexibilityNo cancel fee	On-time71%	Search American Airlines flights
Air France	Cheapest£576	Average£978	FlexibilityNo cancel fee	On-time77%	Search Air France flights

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

Deals for California to London flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

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

Cheapflights helps you find that perfect flight to London from California by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

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

Yes, we can. To see specific flights from California to London with no change fees, users can toggle flexible booking options after using the search form above to find flights.

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

Yes, Cheapflights offers price alerts on California to London flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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Cheap flights from California to London from £205

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 7/12. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from California to London

Cheapest flights from California to LondonExplore the most affordable flight options available from California to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 9 September 2026.

Explore the most affordable flight options available from California to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 9 September 2026.

Best flights from California to LondonDiscover carefully curated flight deals from California to London that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 9 September 2026.

Discover carefully curated flight deals from California to London that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 9 September 2026.

Direct flights from California to LondonExplore direct flight options from California to London based on user searches, and compare prices and availability for your desired travel dates. Data last updated 9 September 2026.

Explore direct flight options from California to London based on user searches, and compare prices and availability for your desired travel dates. Data last updated 9 September 2026.

Last-minute flights from California to LondonDiscover last-minute flight deals from California to London. Data last updated 9 September 2026 and is based on user searches.

Discover last-minute flight deals from California to London. Data last updated 9 September 2026 and is based on user searches.

One-way flights from California to LondonSearch for one-way flight options from California to London. Find affordable one-way fares based on user searches. Data last updated 9 September 2026.

Search for one-way flight options from California to London. Find affordable one-way fares based on user searches. Data last updated 9 September 2026.

Find flight deals from California to London

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One-way from

Popular in

Cheapest in

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

Best time to book a flight from California to London

Have a flexible travel schedule? Discover the best time to fly to London from California with our price prediction graph.

Cheapflights Insights

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

What is the cheapest time of day to fly from CA to LON?

Find hourly flight availability from California to London. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 9 September 2026.

It’s typically best to fly out from California to London in the morning. Doing so could potentially save you 19% on the flight price compared to flying at midday, which is usually more expensive.

Weekly flight availability from California to London

Explore weekly flight availability from California to London. 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 9 September 2026.

The most flights from USCA to LON 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 (28 on average).

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

Airfare is typical for this route at the moment.

California to London flights typically cost between £450 and £740 in October.The cheapest return price found within the last 5 days was £573 on TAP AIR PORTUGAL (20 Oct–27 Oct).

How far ahead should I book a flight from California to London?

Booking 73 days in advance of your planned departure date is, on average, the best time to get cheap flights from California to London. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest day to fly from California to London?

Use this chart to determine the cheapest time to fly return from California to London. Price data was last updated on 5 September 2026.

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

Related info for your journey

How long is the flight from California to London?

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

What are the most popular routes from California to London?

What are the most reliable airlines from California to London?

What are the cheapest flights from California to London?

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

How can I find direct flights from California to London?

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

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

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

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

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

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

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Cheapest flights from California to London
Explore the most affordable flight options available from California to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 9 September 2026.

Best flights from California to London
Discover carefully curated flight deals from California to London that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 9 September 2026.

Direct flights from California to London
Explore direct flight options from California to London based on user searches, and compare prices and availability for your desired travel dates. Data last updated 9 September 2026.

Last-minute flights from California to London
Discover last-minute flight deals from California to London. Data last updated 9 September 2026 and is based on user searches.

One-way flights from California to London
Search for one-way flight options from California to London. Find affordable one-way fares based on user searches. Data last updated 9 September 2026.

California to London flights typically cost between £450 and £740 in October.
The cheapest return price found within the last 5 days was £573 on TAP AIR PORTUGAL (20 Oct–27 Oct).