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

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

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

If you’re flying from a popular airport in California, such as Los Angeles or San Francisco, and flying into London, Ontario, then you can expect flight times to average 4h 40m and 4h 49m, respectively.

What airlines fly to London, Ontario?

Air Canada, Porter Airlines and United Airlines are the top three most popular airlines that fly to London, Ontario from California according to our data. Air Canada is the first choice among our users, with 48% of people opting to fly with this airline when traveling to London, Ontario. Keep in mind that there are 8 different airlines that fly to London, Ontario on a routine basis, so you have a few additional options to choose from.

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

Prices for flights from California to London Airport were last updated today.

How many operators does momondo search for flights from California to London Airport?

There are 2 operators available for flights from California to London Airport as of August 2026.

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 that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check 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 travel and health documents required for your trip to London Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at London Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

$198 Cheap Flights from California to London, Ontario in 2026

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from California to London

Round-trip

One-way

Cheap round-trip flights

Enter your travel dates to find the best prices.

6:05 pm - 5:20 amSFO San Francisco-YXU London

8h 15m1 stop Calgary

6:10 am - 12:00 pmYXU London-SFO San Francisco

8h 50m1 stop Calgary

$351WestJet

Wed, Sep 30 - Wed, Oct 7

6:00 am - 5:20 amSFO San Francisco-YXU London

20h 20m1 stop Calgary

6:10 am - 12:00 pmYXU London-SFO San Francisco

8h 50m1 stop Calgary

$359WestJet

Thu, Sep 17 - Thu, Sep 24

4:40 pm - 5:35 amSFO San Francisco-YXU London

9h 55m1 stop Calgary

6:40 am - 3:50 pmYXU London-SFO San Francisco

12h 10m1 stop Calgary

$400WestJet

Fri, Nov 6 - Mon, Nov 9

7:00 am - 9:40 pmSAN San Diego-YXU London

11h 40m2 stops Montreal Pierre Elliott Trudeau Intl Toronto Pearson Intl

5:40 am - 12:16 pmYXU London-SAN San Diego

9h 36m1 stop Toronto Pearson Intl

$411Air Canada

Tue, Sep 15 - Sat, Sep 19

7:05 am - 9:52 pmSAN San Diego-YXU London

11h 47m2 stops Vancouver Intl Toronto Pearson Intl

5:30 am - 12:00 pmYXU London-SAN San Diego

9h 30m1 stop Toronto Pearson Intl

$418Air Canada

Wed, Oct 28 - Fri, Oct 30

7:00 am - 9:40 pmSAN San Diego-YXU London

11h 40m2 stops Montreal Pierre Elliott Trudeau Intl Toronto Pearson Intl

10:05 am - 8:36 pmYXU London-SAN San Diego

13h 31m2 stops Toronto Pearson Intl Montreal Pierre Elliott Trudeau Intl

$419Air Canada

Tue, Sep 15 - Sat, Sep 19

6:00 am - 4:45 pmSFO San Francisco-YXU London

7h 45m1 stop Calgary

6:10 am - 12:00 pmYXU London-SFO San Francisco

8h 50m1 stop Calgary

$440WestJet

Thu, Oct 1 - Mon, Oct 5

6:05 pm - 5:20 amLAX Los Angeles-YXU London

8h 15m1 stop Calgary

6:10 am - 10:22 pmYXU London-LAX Los Angeles

19h 12m2 stops Calgary San Francisco

$444Multiple Airlines

Fri, Sep 11 - Thu, Sep 17

6:05 pm - 5:20 amLAX Los Angeles-YXU London

8h 15m1 stop Calgary

6:10 am - 10:22 pmYXU London-LAX Los Angeles

19h 12m2 stops Calgary San Francisco

$444Multiple Airlines

Sat, Sep 12 - Thu, Sep 17

6:05 pm - 5:20 amLAX Los Angeles-YXU London

8h 15m1 stop Calgary

6:10 am - 10:37 amYXU London-LAX Los Angeles

31h 27m2 stops Calgary San Francisco

$457Multiple Airlines

Sat, Sep 12 - Tue, Sep 15

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Air Canada flights from California to London, Ontario

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

Air Canada

Sep 15

SAN7:00 amSan Diego

11h 40m

2 stops

YXU9:40 pmLondon

Sep 19

YXU5:40 amLondon

9h 36m

1 stop

SAN12:16 pmSan Diego

$411

Air Canada

Oct 28

SAN7:05 amSan Diego

11h 47m

2 stops

YXU9:52 pmLondon

Oct 30

YXU5:30 amLondon

9h 30m

1 stop

SAN12:00 pmSan Diego

$418

Air Canada

Sep 15

SAN7:00 amSan Diego

11h 40m

2 stops

YXU9:40 pmLondon

Sep 19

YXU10:05 amLondon

13h 31m

2 stops

SAN8:36 pmSan Diego

$419

United Airlines flights from California to London, Ontario

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

United Airlines

Sep 30

SFO12:35 amSan Francisco

11h 20m

2 stops

YXU2:55 pmLondon

Oct 5

YXU3:30 pmLondon

12h 00m

2 stops

SFO12:30 amSan Francisco

$621

United Airlines

Oct 1

SFO6:30 pmSan Francisco

17h 25m

2 stops

YXU2:55 pmLondon

Oct 5

YXU6:20 pmLondon

17h 48m

1 stop

SFO9:08 amSan Francisco

$630

United Airlines

Oct 3

SFO10:51 pmSan Francisco

7h 29m

1 stop

YXU9:20 amLondon

Oct 10

YXU5:40 amLondon

8h 04m

1 stop

SFO10:44 amSan Francisco

$725

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

Cheapest round-trip

San FranciscoLondon

SFO San Francisco - YXU London

SFOYXU

San Francisco

Wed 9/30

6:05 pm-5:20 am

1 stop8h 15m

London

Wed 10/7

6:10 am-12:00 pm

1 stop8h 50m

$351

San FranciscoLondon

SFO San Francisco - YXU London

SFOYXU

San Francisco

Thu 9/17

6:00 am-5:20 am

1 stop20h 20m

London

Thu 9/24

6:10 am-12:00 pm

1 stop8h 50m

$359

San FranciscoLondon

SFO San Francisco - YXU London

SFOYXU

San Francisco

Fri 11/6

4:40 pm-5:35 am

1 stop9h 55m

London

Mon 11/9

6:40 am-3:50 pm

1 stop12h 10m

$400

San DiegoLondon

SAN San Diego - YXU London

SANYXU

San Diego

Tue 9/15

7:00 am-9:40 pm

2 stops11h 40m

London

Sat 9/19

5:40 am-12:16 pm

1 stop9h 36m

$411

San DiegoLondon

SAN San Diego - YXU London

SANYXU

San Diego

Wed 10/28

7:05 am-9:52 pm

2 stops11h 47m

London

Fri 10/30

5:30 am-12:00 pm

1 stop9h 30m

$418

San DiegoLondon

SAN San Diego - YXU London

SANYXU

San Diego

Tue 9/15

7:00 am-9:40 pm

2 stops11h 40m

London

Sat 9/19

10:05 am-8:36 pm

2 stops13h 31m

$419

Quickest round-trip

San FranciscoLondon

SFO San Francisco - YXU London

SFOYXU

San Francisco

Thu 10/1

6:00 am-4:45 pm

1 stop7h 45m

London

Mon 10/5

6:10 am-12:00 pm

1 stop8h 50m

$440

Los AngelesLondon

LAX Los Angeles - YXU London

LAXYXU

Los Angeles

Fri 9/11

6:05 pm-5:20 am

1 stop8h 15m

London

Thu 9/17

6:10 am-10:22 pm

2 stops19h 12m

$444

Los AngelesLondon

LAX Los Angeles - YXU London

LAXYXU

Los Angeles

Sat 9/12

6:05 pm-5:20 am

1 stop8h 15m

London

Thu 9/17

6:10 am-10:22 pm

2 stops19h 12m

$444

Los AngelesLondon

LAX Los Angeles - YXU London

LAXYXU

Los Angeles

Sat 9/12

6:05 pm-5:20 am

1 stop8h 15m

London

Tue 9/15

6:10 am-10:37 am

2 stops31h 27m

$457

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 29% 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

Best Price Found	$198
Fastest flight time	6h 45m
Direct flights	None

The best one-way flight to London, Ontario from California in the past 72 hours is $198. The best round-trip flight deal from California to London, Ontario found on momondo in the last 72 hours is $351.

The fastest flight from California to London, Ontario takes 6h 45m

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

Search flight deals

Frequently asked questions about flying from California to London, Ontario

When did momondo last update prices for flights from California to London Airport?
Prices for flights from California to London Airport were last updated today.
How many operators does momondo search for flights from California to London Airport?
There are 2 operators available for flights from California to London Airport as of August 2026.
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 that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check 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 travel and health documents required for your trip to London Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at London Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Best airlines flying from California to London, Ontario

Compare and see reviews for airlines that fly from California to London, Ontario with momondo

Airline	Rating	Free Cancellation	Price
WestJet	PriceFrom $358	Free Cancellation	Rating 7.2 3,434 reviews		Search WestJet flights
Air Canada	PriceFrom $358	Free Cancellation	Rating 7.1 11,513 reviews		Search Air Canada flights

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Why use momondo?

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

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from California to London for you.

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

Yes. All flights to London from California on momondo can be compared and filtered by various policies on offer, including flexible booking.

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

Once you have performed a search for California to London flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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

If you are simply researching potential flights to London, momondo offers a useful price alert feature which will track prices for flights to London from California and alert you when they change.

An easier way to manage your London, Ontario trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

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Cheap flights from California to London from $198

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from California to London departing on 12/16. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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Air Canada flights from California to London, Ontario

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

United Airlines flights from California to London, Ontario

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

momondo Fare Finder

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

See travel insights to London from

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

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

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

What airlines fly to London, Ontario?

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

Cheap California to London, Ontario flight deals and tips

Best Price Found

Fastest flight time

Direct flights

Frequently asked questions about flying from California to London, Ontario

Best airlines flying from California to London, Ontario

Compare and see reviews for airlines that fly from California to London, Ontario with momondo

Traveling to a place near London?

Why use momondo?

An easier way to manage your London, Ontario trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Canada

Airports servicing Ontario

Fly your favorite airline to London

Airlines are sorted and displayed according to clicks in the past 7 days on momondo

Cabin classes currently available on flights to London

List of cabin classes available on flights landing in London. Availability may vary depending on flight origin and airline.

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