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Cheap flights from California to London, ON from C$ 454

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 21/4. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — YXU
15 Jan — 22 Jan1
1 adult
1 adult, Economy, 0 bags

Cheap 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 16 December 2025.

Fri 19/122:11 p.m.SAN - YXU
2 stops15h 35mAir Canada
Fri 26/125:10 a.m.YXU - SAN
1 stop9h 43mAir Canada
Deal found 14/12C$ 1,966
Fri 19/1211:12 a.m.SAN - YXU
2 stops18h 34mUnited Airlines
Fri 26/125:10 a.m.YXU - SAN
2 stops17h 47mUnited Airlines
Deal found 14/12C$ 1,969

Find flight deals from California to London

Keep the following information in mind while searching for California to London flight deals. Data was last updated 16 December 2025.

Round-trip from

C$ 454

Popular in

November

Cheapest in

May

Average price

C$ 520
Air Canada
  • Air Canada
  • 21/4-25/4
  • 2 total stops
  • 18h 08m total
  • California to London
Search Deals
Highest demand for flights based on searches. 18% potential increase in price (C$ 185 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 9% potential price decrease (C$ 71 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

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 16 December 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

Tue 21/4

8:45 a.m.-9:18 p.m.

1 stop9h 33m

London

Sat 25/4

5:10 a.m.-10:45 a.m.

1 stop8h 35m

C$ 454

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Wed 28/1

2:08 p.m.-6:34 a.m.

2 stops13h 26m

London

Wed 4/2

8:10 p.m.-12:10 p.m.

1 stop19h 00m

C$ 549

San DiegoLondon

SAN - YXU

SANYXU

San Diego

Thu 29/1

8:34 a.m.-6:34 a.m.

2 stops19h 00m

London

Thu 5/2

8:10 p.m.-11:47 a.m.

1 stop18h 37m

C$ 578

San DiegoLondon

SAN - YXU

SANYXU

San Diego

Thu 15/1

6:05 p.m.-8:46 a.m.

2 stops11h 41m

London

Sun 18/1

5:10 a.m.-11:53 a.m.

1 stop9h 43m

C$ 615

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Wed 28/1

2:30 p.m.-8:46 a.m.

1 stop15h 16m

London

Wed 4/2

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

1 stop8h 44m

C$ 622

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Thu 15/1

1:00 p.m.-6:34 a.m.

1 stop14h 34m

London

Mon 19/1

8:10 p.m.-12:12 p.m.

1 stop19h 02m

C$ 645

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Thu 15/1

12:00 p.m.-8:46 a.m.

1 stop17h 46m

London

Mon 19/1

5:40 p.m.-12:20 p.m.

2 stops21h 40m

C$ 688

San JoseLondon

SJC - YXU

SJCYXU

San Jose

Wed 4/3

2:36 p.m.-6:35 a.m.

2 stops36h 59m

London

Wed 18/3

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

2 stops25h 55m

C$ 720

San DiegoLondon

SAN - YXU

SANYXU

San Diego

Thu 29/1

6:05 p.m.-8:46 a.m.

2 stops11h 41m

London

Thu 5/2

5:10 a.m.-5:24 p.m.

2 stops15h 14m

C$ 812

San JoseLondon

SJC - YXU

SJCYXU

San Jose

Fri 15/5

6:45 a.m.-7:07 p.m.

2 stops33h 22m

London

Sat 30/5

6:00 a.m.-10:38 p.m.

2 stops19h 38m

C$ 845

Flights are sorted by cheapest round-trip flights first.

Deals found on 16/12

Showing 1-10 of 14 results
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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$ 28). Flying from California to London, Ontario in November is currently the most expensive (average of C$ 206). 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 Delta can get you from California to London, Ontario in just under 9h 33m. Your travel time can differ by up to 7h 34m. 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 most popular routes from California to London, Ontario?

    The most popular route from California to London, Ontario is San Diego - London. You may also consider San Francisco - London or San Jose - 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$ 28). Flying from California to London, Ontario in November is currently the most expensive (average of C$ 206). 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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