What is the cheapest airline that flies from California to London?

WestJet, Air Canada, and United Airlines are the most popular carriers operating from California to London

Which airlines fly to London, Ontario?

Porter Airlines, Air Canada and United Airlines are the top three most popular airlines that fly to London, Ontario from California according to our data. Porter Airlines is the first choice among our users, with 42% of people opting to fly with this airline when travelling to London, Ontario. Keep in mind that there are 5 different airlines that fly to London, Ontario on a routine basis, so you have a few additional options to choose from.

How long does it take to fly to London, Ontario?

The average flight duration from California to London, Ontario depends on which airport you fly into and out of. Flying from Los Angeles to Toronto Pearson Intl Airport is 4h 35m on average, while flying from Sacramento to Toronto Pearson Intl Airport is 4h 49m on average. Toronto Pearson Intl Airport is the most popular airport in London, Ontario.

When did momondo last update prices for flights from California to London Airport?

Prices for flights from California to London Airport are refreshed on a daily basis.

How old do you have to be to fly from California to London Airport?

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from California to London Airport.

What documentation or ID do you need to fly to London Airport?

The required travel and health documents for your London Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at London Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

C$ 173 Cheap Flights from California to London in 2025/26

1 adult

Save money when you book flights with momondo

Big names, great deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Early arrival? Instantly customize your results

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

Find the cheapest flights from California to London

Round-trip

One-way

Cheap round-trip flights

1:00 p.m. - 7:12 p.m.SFO-YXU

27h 12m1 stop

8:10 p.m. - 9:30 a.m.YXU-SFO

40h 20m2 stops

C$ 526Multiple Airlines

Find Deal

Thu, 30 Oct - Thu, 6 Nov

7:30 a.m. - 9:21 p.m.SFO-YXU

10h 51m2 stops

5:45 a.m. - 10:54 a.m.YXU-SFO

8h 09m1 stop

C$ 553Air Canada

Find Deal

Thu, 19 Feb - Fri, 20 Feb

7:30 a.m. - 9:21 p.m.SFO-YXU

10h 51m2 stops

9:25 a.m. - 9:22 p.m.YXU-SFO

14h 57m2 stops

C$ 559Air Canada

Find Deal

Thu, 19 Feb - Fri, 20 Feb

7:30 a.m. - 9:21 p.m.SFO-YXU

10h 51m2 stops

9:25 a.m. - 9:22 p.m.YXU-SFO

14h 57m2 stops

C$ 568Air Canada

Find Deal

Thu, 19 Feb - Fri, 20 Feb

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

17h 46m1 stop

5:45 a.m. - 10:54 a.m.YXU-SFO

8h 09m1 stop

C$ 576Air Canada

Find Deal

Thu, 30 Oct - Thu, 6 Nov

6:35 a.m. - 5:12 a.m.SAN-YXU

19h 37m2 stops

6:00 a.m. - 1:20 p.m.YXU-SAN

10h 20m1 stop

C$ 635Multiple Airlines

Find Deal

Mon, 29 Sep - Sat, 4 Oct

11:08 a.m. - 9:19 a.m.SAN-YXU

19h 11m2 stops

3:40 p.m. - 12:15 a.m.YXU-SAN

11h 35m2 stops

C$ 670United Airlines

Find Deal

Mon, 29 Sep - Sat, 4 Oct

8:55 p.m. - 5:06 p.m.SFO-YXU

17h 11m2 stops

5:40 p.m. - 1:15 a.m.YXU-SFO

10h 35m2 stops

C$ 682United Airlines

Find Deal

Thu, 30 Oct - Thu, 6 Nov

7:30 a.m. - 7:07 p.m.SFO-YXU

8h 37m1 stop

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

8h 54m1 stop

C$ 1,120WestJet

Find Deal

Sat, 27 Sep - Tue, 30 Sep

7:14 a.m. - 7:07 p.m.SJC-YXU

32h 53m2 stops

6:00 a.m. - 5:30 p.m.YXU-SJC

14h 30m2 stops

C$ 1,542WestJet

Find Deal

Sat, 27 Sep - Tue, 30 Sep

United Airlines flights from California to London, Ontario

Our best United Airlines deals on California to London, Ontario flight tickets

United Airlines

29 Sep

SAN11:08 a.m.San Diego

19h 11m

2 stops

YXU9:19 a.m.London

4 Oct

YXU3:40 p.m.London

11h 35m

2 stops

SAN12:15 a.m.San Diego

C$ 670

Find similar

United Airlines

30 Oct

SFO8:55 p.m.San Francisco

17h 11m

2 stops

YXU5:06 p.m.London

6 Nov

YXU5:40 p.m.London

10h 35m

2 stops

SFO1:15 a.m.San Francisco

C$ 682

Find similar

United Airlines

18 Feb

SFO12:43 a.m.San Francisco

17h 38m

2 stops

YXU9:21 p.m.London

20 Feb

YXU5:45 a.m.London

8h 09m

1 stop

SFO10:54 a.m.San Francisco

C$ 695

Find similar

Air Canada flights from California to London, Ontario

Our best Air Canada deals on California to London, Ontario flight tickets

Air Canada

19 Feb

SFO7:30 a.m.San Francisco

10h 51m

2 stops

YXU9:21 p.m.London

20 Feb

YXU5:45 a.m.London

8h 09m

1 stop

SFO10:54 a.m.San Francisco

C$ 553

Find similar

Air Canada

19 Feb

SFO7:30 a.m.San Francisco

10h 51m

2 stops

YXU9:21 p.m.London

20 Feb

YXU9:25 a.m.London

14h 57m

2 stops

SFO9:22 p.m.San Francisco

C$ 559

Find similar

Air Canada

19 Feb

SFO7:30 a.m.San Francisco

10h 51m

2 stops

YXU9:21 p.m.London

20 Feb

YXU9:25 a.m.London

14h 57m

2 stops

SFO9:22 p.m.San Francisco

C$ 568

Find similar

momondo Fare Finder

Use the filters below to find and compare flights from California to London, Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Thu 30/10

1:00 p.m.-7:12 p.m.

1 stop27h 12m

London

Thu 6/11

8:10 p.m.-9:30 a.m.

2 stops40h 20m

C$ 526

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Thu 19/2

7:30 a.m.-9:21 p.m.

2 stops10h 51m

London

Fri 20/2

5:45 a.m.-10:54 a.m.

1 stop8h 09m

C$ 553

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Thu 19/2

7:30 a.m.-9:21 p.m.

2 stops10h 51m

London

Fri 20/2

9:25 a.m.-9:22 p.m.

2 stops14h 57m

C$ 559

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Thu 19/2

7:30 a.m.-9:21 p.m.

2 stops10h 51m

London

Fri 20/2

9:25 a.m.-9:22 p.m.

2 stops14h 57m

C$ 568

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Thu 30/10

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

1 stop17h 46m

London

Thu 6/11

5:45 a.m.-10:54 a.m.

1 stop8h 09m

C$ 576

San DiegoLondon

SAN - YXU

SANYXU

San Diego

Mon 29/9

6:35 a.m.-5:12 a.m.

2 stops19h 37m

London

Sat 4/10

6:00 a.m.-1:20 p.m.

1 stop10h 20m

C$ 635

San DiegoLondon

SAN - YXU

SANYXU

San Diego

Mon 29/9

11:08 a.m.-9:19 a.m.

2 stops19h 11m

London

Sat 4/10

3:40 p.m.-12:15 a.m.

2 stops11h 35m

C$ 670

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Thu 30/10

8:55 p.m.-5:06 p.m.

2 stops17h 11m

London

Thu 6/11

5:40 p.m.-1:15 a.m.

2 stops10h 35m

C$ 682

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Sat 27/9

7:30 a.m.-7:07 p.m.

1 stop8h 37m

London

Tue 30/9

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

1 stop8h 54m

C$ 1,120

San JoseLondon

SJC - YXU

SJCYXU

San Jose

Sat 27/9

7:14 a.m.-7:07 p.m.

2 stops32h 53m

London

Tue 30/9

6:00 a.m.-5:30 p.m.

2 stops14h 30m

C$ 1,542

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from California to London, Ontario

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Other information

Can stopping save me money on California to London, Ontario flights?

You could potentially save up to 48% on your flight if you consider stops on a California to London, Ontario flight.

Cheap California to London, Ontario flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from California to London, Ontario

Direct flights	None

There are no direct flights from California to London, Ontario. There are no popular flight routes from California to London, Ontario.

Search flight deals

When did momondo last update prices for flights from California to London Airport?
Prices for flights from California to London Airport are refreshed on a daily basis.
How old do you have to be to fly from California to London Airport?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from California to London Airport.
What documentation or ID do you need to fly to London Airport?
The required travel and health documents for your London Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at London Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Grand Bend

Port Stanley

Why use momondo?

Why should I use momondo to find a flight deal from California to London?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from California to London. momondo saves you time and could save you money on your trip.

Can I find flights from California to London with flexible booking policies on momondo?

Flights from California to London with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from California to London?

Once all potential California to London flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from California to London right now. Can momondo alert me if prices change?

Price alerts on flights to London from California are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.