Find flights
When to book
Airlines
FAQs

Cheap flights from California to London, ON from C$ 229

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 27/4. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — YXU
22 Apr — 29 Apr1
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 17 April 2025.

Round-trip from

C$ 410

One-way from

C$ 229

Popular in

May

Cheapest in

February

Average price

C$ 530
WestJet
  • WestJet
  • 10/6-17/6
  • 2 total stops
  • 17h 14m total
  • California to London
Search Deals
Air Canada
  • Air Canada
  • 27/4
  • 1 total stop
  • 7h 21m total
  • California to London
Search Deals
Highest demand for flights based on searches. 14% potential increase in price (C$ 139 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
Search Deals

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 17 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 17/4C$ 410
Thu 8/52:45 p.m.SFO - YXU
2 stops11h 29mMultiple Airlines
Thu 15/56:15 a.m.YXU - SFO
2 stops18h 36mMultiple Airlines
Deal found 17/4C$ 452
Tue 20/511:20 p.m.SFO - YXU
2 stops12h 43mUnited Airlines
Tue 27/56:15 a.m.YXU - SFO
2 stops18h 15mUnited Airlines
Deal found 17/4C$ 549
Tue 20/56:20 a.m.SJC - YXU
2 stops23h 58mUnited Airlines
Tue 27/59:55 a.m.YXU - SJC
2 stops13h 55mUnited Airlines
Deal found 17/4C$ 1,284
Wed 7/512:10 a.m.SFO - YXU
2 stops11h 54mAir Canada
Thu 15/59:55 a.m.YXU - SFO
1 stop14h 54mAir Canada
Deal found 17/4C$ 1,495

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 17 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$ 410

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Thu 8/5

2:45 p.m.-5:14 a.m.

2 stops11h 29m

London

Thu 15/5

6:15 a.m.-9:51 p.m.

2 stops18h 36m

C$ 452

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Tue 20/5

11:20 p.m.-3:03 p.m.

2 stops12h 43m

London

Tue 27/5

6:15 a.m.-9:30 p.m.

2 stops18h 15m

C$ 549

San JoseLondon

SJC - YXU

SJCYXU

San Jose

Tue 20/5

6:20 a.m.-9:18 a.m.

2 stops23h 58m

London

Tue 27/5

9:55 a.m.-8:50 p.m.

2 stops13h 55m

C$ 1,284

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Wed 7/5

12:10 a.m.-3:04 p.m.

2 stops11h 54m

London

Thu 15/5

9:55 a.m.-9:49 p.m.

1 stop14h 54m

C$ 1,495

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Sun 27/4

10:52 p.m.-9:13 a.m.

1 stop7h 21m

C$ 229

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Sat 26/4

12:08 a.m.-2:48 p.m.

2 stops11h 40m

C$ 243

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Sun 27/4

10:05 p.m.-7:09 p.m.

3 stops42h 04m

C$ 417

San JoseLondon

SJC - YXU

SJCYXU

San Jose

Sun 27/4

3:29 p.m.-5:14 a.m.

2 stops10h 45m

C$ 2,314

Flights are sorted by cheapest round-trip flights first.

Deals found on 16/4

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 17 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 17 April 2025.
United Airlines
7.4
Good
8,667 reviews
Check prices

Food

6.6

Boarding

7.7

Crew

8.1

Comfort

7.3

Overall

7.4

Entertainment

7.0

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
United Airlines
7.4
Good
8,667 reviews
United Airlines
7.4
Good
8,667 reviews
Check prices

Food

6.6

Boarding

7.7

Crew

8.1

Comfort

7.3

Overall

7.4

Entertainment

7.0

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
WestJet
7.2
Good
2,809 reviews
United Airlines
7.4
Good
8,667 reviews
Check prices

Food

6.6

Boarding

7.7

Crew

8.1

Comfort

7.3

Overall

7.4

Entertainment

7.0

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
Air Canada
7.0
Good
9,143 reviews
United Airlines
7.4
Good
8,667 reviews
Check prices

Food

6.6

Boarding

7.7

Crew

8.1

Comfort

7.3

Overall

7.4

Entertainment

7.0

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??

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 Air Canada, which is currently one of the cheapest options available, starting at C$ 229. United Airlines flights start at C$ 243 while deals on WestJet start at C$ 2,314 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, 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

Travelling to a place near California?

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

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.
Newark to Pearson Intl flights
Newark to Toronto Island flights
Newark to Pierre Elliott Trudeau Intl flights
LaGuardia to Pearson Intl flights
LaGuardia to Pierre Elliott Trudeau Intl flights
John F Kennedy Intl to Pearson Intl flights
Dulles Intl to Pearson Intl flights
San Francisco to Pearson Intl flights
Dallas/Fort Worth to Pearson Intl flights
Los Angeles to Pearson Intl flights
Reagan-National to Pearson Intl flights
Boston to Pearson Intl flights
Dulles Intl to Pierre Elliott Trudeau Intl flights
O'Hare Intl to Pearson Intl flights
Seattle to Pearson Intl flights
John F Kennedy Intl to Pierre Elliott Trudeau Intl flights
O'Hare Intl to Pierre Elliott Trudeau Intl flights
San Francisco to Pierre Elliott Trudeau Intl flights
Reagan-National to Pierre Elliott Trudeau Intl flights
Hobby to Pearson Intl flights
Boston to Pierre Elliott Trudeau Intl flights
Los Angeles to Pierre Elliott Trudeau Intl flights
Boston to Toronto Island flights
Dulles Intl to Toronto Island flights
Atlanta to Pearson Intl flights
George Bush Intcntl to Pearson Intl flights
Dallas/Fort Worth to Pierre Elliott Trudeau Intl flights
Baltimore to Pearson Intl flights
Denver to Pierre Elliott Trudeau Intl flights
Seattle to Pierre Elliott Trudeau Intl flights
Fort Lauderdale to Pearson Intl flights
Atlanta to Pierre Elliott Trudeau Intl flights
Denver to Pearson Intl flights
Fort Lauderdale to Pierre Elliott Trudeau Intl flights
Orlando to Pearson Intl flights
Philadelphia to Pearson Intl flights
Baltimore to Pierre Elliott Trudeau Intl flights
Raleigh to Pearson Intl flights
Minneapolis to Pearson Intl flights
San Diego to Pearson Intl flights
Miami to Pearson Intl flights
Midway to Pierre Elliott Trudeau Intl flights
Minneapolis to Pierre Elliott Trudeau Intl flights
Austin to Pearson Intl flights
John F Kennedy Intl to Toronto Island flights
Philadelphia to Pierre Elliott Trudeau Intl flights
Midway to Toronto Island flights
Detroit to Pierre Elliott Trudeau Intl flights
Ontario to Pearson Intl flights
Tampa to Pearson 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.