Find flights
When to book
FAQs

Cheap flights from California to London, ON from C$ 267

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 14/12. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — YXU
21 Nov — 28 Nov1
1 adult
1 adult, Economy

Cheap flight deals from California to London

Keep the following information in mind while searching for California to London flight deals. Data was last updated 22 October 2025.

Round-trip from

C$ 608

One-way from

C$ 267

Popular in

September

Cheapest in

May

Average price

C$ 692
Air Canada
  • Air Canada
  • 19/2-20/2
  • 3 total stops
  • 19h 30m total
  • California to London
Search Deals
14/12
  • 14/12
  • 2 total stops
  • 29h 57m total
  • California to London
Search Deals
Highest demand for flights based on searches. 22% potential increase in price (C$ 232 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 9% potential price decrease (C$ 68 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
Search Deals

Find flight deals from California to London

Enter your travel dates to find the best prices.

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 22 October 2025.

Thu 4/126:15 a.m.SAN - YXU
2 stops33h 57mMultiple Airlines
Thu 11/128:10 p.m.YXU - SAN
1 stop18h 35mMultiple Airlines
Deal found 20/10C$ 714
Fri 5/125:00 a.m.SFO - YXU
2 stops9h 05mAir Canada
Sat 6/125:15 a.m.YXU - SFO
1 stop8h 35mAir Canada
Deal found 20/10C$ 735
Tue 23/128:16 p.m.SFO - YXU
2 stops31h 18mMultiple Airlines
Wed 7/18:10 p.m.YXU - SFO
1 stop19h 02mMultiple Airlines
Deal found 21/10C$ 752
Wed 24/129:30 p.m.SFO - YXU
2 stops30h 04mMultiple Airlines
Wed 7/18:10 p.m.YXU - SFO
1 stop19h 02mMultiple Airlines
Deal found 21/10C$ 792
Sun 21/1210:45 p.m.SFO - YXU
2 stops28h 49mMultiple Airlines
Wed 7/18:10 p.m.YXU - SFO
1 stop19h 02mMultiple Airlines
Deal found 21/10C$ 796
Thu 4/1212:40 p.m.SAN - YXU
1 stop17h 06mAir Canada
Thu 11/125:15 a.m.YXU - SAN
1 stop9h 38mAir Canada
Deal found 20/10C$ 845
Tue 16/121:00 p.m.SFO - YXU
1 stop14h 34mMultiple Airlines
Mon 5/18:10 p.m.YXU - SFO
2 stops29h 59mMultiple Airlines
Deal found 19/10C$ 877
Mon 15/128:50 a.m.SFO - YXU
1 stop9h 31mAir Canada
Mon 5/19:25 a.m.YXU - SFO
2 stops18h 49mAir Canada
Deal found 19/10C$ 907
Tue 16/121:00 p.m.SFO - YXU
1 stop14h 34mMultiple Airlines
Sun 4/18:10 p.m.YXU - SFO
2 stops43h 14mMultiple Airlines
Deal found 19/10C$ 909
Wed 24/126:00 p.m.SFO - YXU
2 stops20h 05mAir Canada
Wed 7/15:15 a.m.YXU - SFO
2 stops13h 20mAir Canada
Deal found 21/10C$ 912
Tue 23/124:15 p.m.SFO - YXU
1 stop13h 31mAir Canada
Tue 6/15:10 a.m.YXU - SFO
1 stop8h 44mAir Canada
Deal found 21/10C$ 919
Wed 31/1210:57 a.m.SAN - YXU
2 stops16h 37mMultiple Airlines
Tue 6/18:10 p.m.YXU - SAN
1 stop18h 35mMultiple Airlines
Deal found 21/10C$ 921

Cheapflights Fare Finder

 
Customize your flight search to find flights from California to London 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, Cheapflights users made 629,999 searches. Data last updated 22 October 2025.
Use the filters below to find and compare flights from California to London that are best for you.

Fly from

California

Fly to

London

Route

Depart

Return

Price

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Thu 19/2

8:30 a.m.-9:21 p.m.

1 stop9h 51m

London

Fri 20/2

5:15 a.m.-10:54 a.m.

1 stop8h 39m

C$ 633

San DiegoLondon

SAN - YXU

SANYXU

San Diego

Thu 4/12

6:15 a.m.-7:12 p.m.

2 stops33h 57m

London

Thu 11/12

8:10 p.m.-11:45 a.m.

1 stop18h 35m

C$ 714

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Wed 18/2

12:43 a.m.-5:05 p.m.

2 stops13h 22m

London

Fri 20/2

5:15 a.m.-10:54 a.m.

1 stop8h 39m

C$ 720

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Mon 23/3

5:15 a.m.-8:46 a.m.

2 stops24h 31m

London

Sun 29/3

5:45 a.m.-11:02 p.m.

2 stops20h 17m

C$ 773

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Tue 24/3

10:50 p.m.-9:21 p.m.

2 stops19h 31m

London

Sun 29/3

9:25 a.m.-11:02 p.m.

2 stops16h 37m

C$ 773

San DiegoLondon

SAN - YXU

SANYXU

San Diego

Thu 19/2

6:10 p.m.-8:46 a.m.

2 stops11h 36m

London

Mon 23/2

5:15 a.m.-11:53 a.m.

1 stop9h 38m

C$ 820

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Mon 15/12

8:50 a.m.-9:21 p.m.

1 stop9h 31m

London

Mon 5/1

9:25 a.m.-1:14 a.m.

2 stops18h 49m

C$ 907

San DiegoLondon

SAN - YXU

SANYXU

San Diego

Wed 31/12

10:57 a.m.-6:34 a.m.

2 stops16h 37m

London

Tue 6/1

8:10 p.m.-11:45 a.m.

1 stop18h 35m

C$ 921

San JoseLondon

SJC - YXU

SJCYXU

San Jose

Wed 4/3

5:00 p.m.-6:35 a.m.

2 stops34h 35m

London

Wed 18/3

8:10 p.m.-7:05 p.m.

2 stops25h 55m

C$ 924

San DiegoLondon

SAN - YXU

SANYXU

San Diego

Thu 4/12

5:45 p.m.-5:05 p.m.

3 stops20h 20m

London

Thu 11/12

5:15 a.m.-11:53 a.m.

1 stop9h 38m

C$ 939

Flights are sorted by cheapest round-trip flights first.

Deals found on 22/10

Showing 1-10 of 25 results
1
2
3

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.
Estimated round-trip 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

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

Currently, December is the cheapest month in which you can book a flight from California to London, Ontario (average of C$ 27). Flying from California to London, Ontario in March is currently the most expensive (average of C$ 171). 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.

Related info for your journey

Find useful and relevant information for your journey from California to London. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to London from California?

    London (YXU) is the airport you will fly into if you book a flight from California to London. It is only a 8.6 km journey from London (YXU) to London’s city centre.

  • How long is the flight from California to London, Ontario?

    Air Canada and United Airlines can get you from California to London, Ontario in just under 9h 51m. Your travel time can differ by up to 3h 31m. The distance from California to London, Ontario is about 3508 km. Both multi-stop and direct flights can be found to your destination and back.

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

    To fly one-way, consider booking your trip with WestJet, which is currently one of the cheapest options available, starting at C$ 335. Air Canada flights start at C$ 337 while deals on United Airlines start at C$ 648 one-way.

  • What are the most popular routes from California to London, Ontario?

    The most popular route from California to London, Ontario is San Francisco - London. You may also consider San Jose - London or San Diego - London.

  • 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 vacation 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, Ontario?

    Currently, December is the cheapest month in which you can book a flight from California to London, Ontario (average of C$ 27). Flying from California to London, Ontario in March is currently the most expensive (average of C$ 171). 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

Travelling to a place near London?

Book flights to London if you plan to visit one of these locations
Port Stanley
Grand Bend

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 London

See prices for flight routes from nearby airports that may be better suited for you.
LaGuardia to Pearson Intl flights
Newark to Pearson Intl flights
John F Kennedy Intl to Pearson Intl flights
Newark to Toronto Island flights
Los Angeles to Pearson Intl flights
Newark to Pierre Elliott Trudeau Intl flights
LaGuardia to Pierre Elliott Trudeau Intl flights
John F Kennedy Intl to Pierre Elliott Trudeau Intl flights
San Francisco to Pearson Intl flights
O'Hare Intl to Pearson Intl flights
Boston to Pearson Intl flights
Reagan-National to Pearson Intl flights
Dulles Intl to Pearson Intl flights
Boston to Toronto Island flights
Dulles Intl to Pierre Elliott Trudeau Intl flights
Dallas/Fort Worth to Pearson Intl flights
Seattle to Pearson Intl flights
Fort Lauderdale to Pierre Elliott Trudeau Intl flights
Los Angeles to Toronto Island flights
Reagan-National to Pierre Elliott Trudeau Intl flights
Boston to Pierre Elliott Trudeau Intl flights
Atlanta to Pearson Intl flights
Dulles Intl to Toronto Island flights
Hobby to Pearson Intl flights
Los Angeles to Pierre Elliott Trudeau Intl flights
O'Hare Intl to Pierre Elliott Trudeau Intl flights
Fort Lauderdale to Pearson Intl flights
Ontario to Pearson Intl flights
Orlando to Pearson Intl flights
Baltimore to Pearson Intl flights
Philadelphia to Pearson Intl flights
Sky Harbor Intl to Pearson Intl flights
George Bush Intcntl to Pearson Intl flights
Midway to Toronto Island flights
San Francisco to Pierre Elliott Trudeau Intl flights
Minneapolis to Pearson Intl flights
Philadelphia to Pierre Elliott Trudeau Intl flights
Charlotte to Pearson Intl flights
Nashville to Pearson Intl flights
San Diego to Pearson Intl flights
Tampa to Pearson Intl flights
Miami to Pearson Intl flights
Minneapolis to Pierre Elliott Trudeau Intl flights
Denver to Pearson Intl flights
Raleigh to Pearson Intl flights
Midway to Pearson Intl flights
Baltimore to Pierre Elliott Trudeau Intl flights
Austin to Pearson Intl flights
Dallas/Fort Worth to Pierre Elliott Trudeau Intl flights
Detroit to Pierre Elliott Trudeau Intl flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

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

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 London from California today with Cheapflights!

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

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from California to London for you. Better yet — we are completely free to use.

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, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

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.