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Cheap flights from California to London, ON from C$ 250

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 2/9. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — YXU
19 Aug — 26 Aug1
1 adult

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 14 August 2025.

Round-trip from

C$ 443

One-way from

C$ 250

Popular in

July

Cheapest in

May

Average price

C$ 645
WestJet
  • WestJet
  • 8/9-16/9
  • 3 total stops
  • 24h 51m total
  • California to London
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2/9
  • 2/9
  • 2 total stops
  • 44h 12m total
  • California to London
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Highest demand for flights based on searches. 25% potential increase in price (C$ 242 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease (C$ 36 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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Find flight deals from California to London

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 14 August 2025.

Mon 8/910:15 a.m.SFO - YXU
2 stops15h 57mMultiple Airlines
Tue 16/96:00 a.m.YXU - SFO
1 stop8h 54mMultiple Airlines
Deal found 13/8C$ 443
Mon 8/912:50 p.m.SFO - YXU
1 stop13h 22mWestJet
Tue 16/96:00 a.m.YXU - SFO
1 stop8h 54mWestJet
Deal found 13/8C$ 487
Sun 7/912:43 a.m.SFO - YXU
2 stops17h 46mUnited Airlines
Tue 16/93:50 p.m.YXU - SFO
1 stop8h 42mUnited Airlines
Deal found 14/8C$ 815
Fri 29/84:15 p.m.SFO - YXU
2 stops19h 47mMultiple Airlines
Tue 9/96:10 a.m.YXU - SFO
1 stop9h 48mMultiple Airlines
Deal found 12/8C$ 988
Thu 28/86:58 p.m.SFO - YXU
2 stops17h 04mMultiple Airlines
Mon 1/95:45 p.m.YXU - SFO
2 stops20h 26mMultiple Airlines
Deal found 13/8C$ 1,096
Thu 28/810:15 a.m.SFO - YXU
1 stop31h 45mFlair Airlines
Mon 1/99:45 p.m.YXU - SFO
1 stop14h 45mFlair Airlines
Deal found 13/8C$ 1,117
Mon 8/96:20 p.m.SJC - YXU
2 stops17h 57mUnited Airlines
Tue 16/93:50 p.m.YXU - SJC
2 stops21h 01mUnited Airlines
Deal found 14/8C$ 1,153
Mon 8/96:20 p.m.SJC - YXU
2 stops17h 57mMultiple Airlines
Tue 16/96:10 a.m.YXU - SJC
2 stops18h 08mMultiple Airlines
Deal found 13/8C$ 1,255
Fri 22/86:15 a.m.SAN - YXU
2 stops12h 12mUnited Airlines
Sun 24/86:15 a.m.YXU - SAN
2 stops16h 31mUnited Airlines
Deal found 14/8C$ 1,719
Thu 28/87:23 a.m.SJC - YXU
2 stops18h 51mMultiple Airlines
Sun 31/86:00 a.m.YXU - SJC
2 stops18h 00mMultiple Airlines
Deal found 14/8C$ 1,760
Fri 22/82:05 p.m.SAN - YXU
1 stop12h 09mMultiple Airlines
Sun 24/88:00 p.m.YXU - SAN
2 stops27h 16mMultiple Airlines
Deal found 14/8C$ 1,777
Fri 22/82:05 p.m.SAN - YXU
1 stop12h 09mWestJet
Sun 24/88:00 p.m.YXU - SAN
1 stop20h 20mWestJet
Deal found 14/8C$ 1,839

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 14 August 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

Mon 8/9

10:15 a.m.-5:12 a.m.

2 stops15h 57m

London

Tue 16/9

6:00 a.m.-11:54 a.m.

1 stop8h 54m

C$ 443

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Mon 8/9

12:50 p.m.-5:12 a.m.

1 stop13h 22m

London

Tue 16/9

6:00 a.m.-11:54 a.m.

1 stop8h 54m

C$ 487

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Sun 7/9

12:43 a.m.-9:29 p.m.

2 stops17h 46m

London

Tue 16/9

3:50 p.m.-9:32 p.m.

1 stop8h 42m

C$ 815

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Fri 29/8

4:15 p.m.-3:02 p.m.

2 stops19h 47m

London

Tue 9/9

6:10 a.m.-3:28 p.m.

2 stops12h 18m

C$ 988

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Thu 28/8

6:58 p.m.-3:02 p.m.

2 stops17h 04m

London

Mon 1/9

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

2 stops20h 26m

C$ 1,096

San JoseLondon

SJC - YXU

SJCYXU

San Jose

Mon 8/9

6:20 p.m.-3:17 p.m.

2 stops17h 57m

London

Tue 16/9

3:50 p.m.-9:51 a.m.

2 stops21h 01m

C$ 1,153

San JoseLondon

SJC - YXU

SJCYXU

San Jose

Mon 8/9

6:20 p.m.-3:17 p.m.

2 stops17h 57m

London

Tue 16/9

6:10 a.m.-9:18 p.m.

2 stops18h 08m

C$ 1,255

San JoseLondon

SJC - YXU

SJCYXU

San Jose

Thu 28/8

7:23 a.m.-5:14 a.m.

2 stops18h 51m

London

Sun 31/8

6:00 a.m.-9:00 p.m.

2 stops18h 00m

C$ 1,760

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Tue 2/9

6:00 a.m.-5:12 a.m.

2 stops44h 12m

C$ 250

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Sat 27/9

7:30 a.m.-5:12 a.m.

1 stop18h 42m

C$ 287

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/8

Showing 1-10 of 17 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, October is the cheapest month in which you can book a flight from California to London, Ontario (average of C$ 243). Flying from California to London, Ontario in December is currently the most expensive (average of C$ 478). 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 YXU?

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 14 August 2025.

When flying from California to London, Ontario, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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.

  • 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, October is the cheapest month in which you can book a flight from California to London, Ontario (average of C$ 243). Flying from California to London, Ontario in December is currently the most expensive (average of C$ 478). 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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