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Cheap flights from California to London, ON from C$ 227

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 11/6. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — YXU
4 May — 11 May1
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 29 April 2025.

Round-trip from

C$ 493

One-way from

C$ 227

Popular in

May

Cheapest in

February

Average price

C$ 529
WestJet
  • WestJet
  • 10/6-17/6
  • 2 total stops
  • 17h 14m total
  • California to London
Search Deals
WestJet
  • WestJet
  • 11/6
  • 1 total stop
  • 8h 09m total
  • California to London
Search Deals
Highest demand for flights based on searches. 14% potential increase in price (C$ 140 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (C$ 35 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 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 29 April 2025.

Tue 10/66:05 p.m.SFO - YXU
1 stop8h 09mWestJet
Tue 17/66:00 a.m.YXU - SFO
1 stop9h 05mWestJet
Deal found 28/4C$ 493
Thu 12/610:30 p.m.SAN - YXU
2 stops13h 28mAir Canada
Thu 19/69:55 a.m.YXU - SAN
2 stops12h 43mAir Canada
Deal found 28/4C$ 606
Thu 12/610:15 a.m.SFO - YXU
2 stops39h 59mMultiple Airlines
Thu 19/66:00 a.m.YXU - SFO
2 stops10h 59mMultiple Airlines
Deal found 28/4C$ 766
Wed 11/612:43 a.m.SFO - YXU
2 stops17h 45mUnited Airlines
Thu 19/63:35 p.m.YXU - SFO
1 stop9h 18mUnited Airlines
Deal found 28/4C$ 1,031
Thu 12/62:05 p.m.SAN - YXU
1 stop12h 09mWestJet
Thu 19/68:00 p.m.YXU - SAN
1 stop20h 20mWestJet
Deal found 28/4C$ 1,443

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 29 April 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 10/6

6:05 p.m.-5:14 a.m.

1 stop8h 09m

London

Tue 17/6

6:00 a.m.-12:05 p.m.

1 stop9h 05m

C$ 493

San DiegoLondon

SAN - YXU

SANYXU

San Diego

Thu 12/6

10:30 p.m.-2:58 p.m.

2 stops13h 28m

London

Thu 19/6

9:55 a.m.-7:38 p.m.

2 stops12h 43m

C$ 606

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Thu 12/6

10:15 a.m.-5:14 a.m.

2 stops39h 59m

London

Thu 19/6

6:00 a.m.-1:59 p.m.

2 stops10h 59m

C$ 766

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Wed 11/6

12:43 a.m.-9:28 p.m.

2 stops17h 45m

London

Thu 19/6

3:35 p.m.-9:53 p.m.

1 stop9h 18m

C$ 1,031

San DiegoLondon

SAN - YXU

SANYXU

San Diego

Thu 12/6

2:05 p.m.-5:14 a.m.

1 stop12h 09m

London

Thu 19/6

8:00 p.m.-1:20 p.m.

1 stop20h 20m

C$ 1,443

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Wed 11/6

6:05 p.m.-5:14 a.m.

1 stop8h 09m

C$ 227

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Wed 11/6

6:00 a.m.-5:14 a.m.

3 stops20h 14m

C$ 249

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Fri 13/6

10:45 p.m.-2:58 p.m.

2 stops13h 13m

C$ 267

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Thu 12/6

6:05 p.m.-5:14 a.m.

1 stop8h 09m

C$ 308

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Fri 9/5

10:52 p.m.-9:19 a.m.

1 stop7h 27m

C$ 642

Flights are sorted by cheapest round-trip flights first.

Deals found on 28/4

Showing 1-10 of 11 results
1
2

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 29 April 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.

Rainfall in London by month

Plan your trip to London by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in London, Ontario ranges from 70.0 - 100.0 mm per month. January is typically the wettest month, when rainfall can reach 100.0 mm. March is typically the driest time to visit London, Ontario when rainfall is around 70.0 mm.

Temperature in London by month

Plan your trip to London by taking into account the average temperature totals by month.

If weather is an important factor for your trip to London, Ontario, 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 20.0 C. Travellers hoping to avoid the cold should look outside of February, when temperatures are typically at their lowest (around -6.0 C).

Reviews of airlines servicing London

Get insights into the airlines that provide service to London. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to London. Reviews last updated 29 April 2025.
Delta
8.0
Very good
7,929 reviews
Check prices

Entertainment

7.9

Comfort

7.9

Boarding

8.2

Food

7.3

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Delta
8.0
Very good
7,929 reviews
Delta
8.0
Very good
7,929 reviews
Check prices

Entertainment

7.9

Comfort

7.9

Boarding

8.2

Food

7.3

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
United Airlines
7.4
Good
8,696 reviews
Delta
8.0
Very good
7,929 reviews
Check prices

Entertainment

7.9

Comfort

7.9

Boarding

8.2

Food

7.3

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
WestJet
7.2
Good
2,823 reviews
Delta
8.0
Very good
7,929 reviews
Check prices

Entertainment

7.9

Comfort

7.9

Boarding

8.2

Food

7.3

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Air Canada
7.0
Good
9,240 reviews
Delta
8.0
Very good
7,929 reviews
Check prices

Entertainment

7.9

Comfort

7.9

Boarding

8.2

Food

7.3

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

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 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$ 227. United Airlines flights start at C$ 267 while deals on Delta start at C$ 308 one-way.

  • 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 Jose - London or San Francisco - 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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