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Cheap flights from California to London from $172

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 9/15. 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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Find the cheapest flights from California to London

Cheap round-trip flights

Logo
10:15 am - 5:12 amSFO-YXU
15h 57m2 stops
Logo
6:00 am - 11:54 amYXU-SFO
8h 54m1 stop
$362
Find Deal
Thu, Sep 18 - Sun, Sep 21
Logo
10:15 am - 5:12 amSFO-YXU
15h 57m2 stops
Logo
6:00 am - 11:54 amYXU-SFO
8h 54m1 stop
$365
Find Deal
Mon, Sep 8 - Tue, Sep 16
Logo
10:15 am - 5:12 amSFO-YXU
15h 57m2 stops
Logo
8:00 pm - 11:54 amYXU-SFO
18h 54m1 stop
$369
Find Deal
Mon, Sep 8 - Tue, Sep 16
WestJet Logo
6:05 pm - 5:12 amSFO-YXU
8h 07m1 stop
WestJet Logo
6:00 am - 11:54 amYXU-SFO
8h 54m1 stop
$372WestJet
Find Deal
Mon, Sep 8 - Tue, Sep 16
WestJet Logo
6:05 pm - 5:12 amSFO-YXU
8h 07m1 stop
WestJet Logo
6:00 am - 11:54 amYXU-SFO
8h 54m1 stop
$375WestJet
Find Deal
Mon, Sep 8 - Tue, Sep 16
Air Canada Logo
6:15 am - 9:17 amSAN-YXU
24h 02m2 stops
Air Canada Logo
6:15 am - 3:50 pmYXU-SAN
12h 35m2 stops
$553Air Canada
Find Deal
Wed, Aug 20 - Fri, Oct 24
United Airlines Logo
12:56 am - 3:17 pmLAX-YXU
11h 21m2 stops
United Airlines Logo
10:00 am - 2:43 pmYXU-LAX
7h 43m1 stop
$578United Airlines
Find Deal
Sun, Sep 14 - Mon, Sep 22
United Airlines Logo
10:30 pm - 3:02 pmSAN-YXU
13h 32m2 stops
United Airlines Logo
3:40 pm - 12:15 amYXU-SAN
11h 35m2 stops
$583United Airlines
Find Deal
Thu, Aug 21 - Fri, Oct 24
Air Canada Logo
10:20 pm - 5:07 pmSAN-YXU
15h 47m2 stops
Air Canada Logo
9:55 am - 7:38 pmYXU-SAN
12h 43m2 stops
$873Air Canada
Find Deal
Fri, Aug 15 - Mon, Aug 18
Delta Logo
2:05 pm - 5:14 amSAN-YXU
12h 09m1 stop
Delta Logo
6:00 am - 1:20 pmYXU-SAN
10h 20m1 stop
$1,377Delta
Find Deal
Fri, Aug 15 - Mon, Aug 18

WestJet flights from California to London, Ontario

Our best WestJet deals on California to London, Ontario flight tickets
WestJet
Sep 8
SFO6:05 pmSan Francisco
8h 07m
1 stop
YXU5:12 amLondon
Sep 16
YXU6:00 amLondon
8h 54m
1 stop
SFO11:54 amSan Francisco
$372
Find similar
WestJet
Sep 8
SFO6:05 pmSan Francisco
8h 07m
1 stop
YXU5:12 amLondon
Sep 16
YXU6:00 amLondon
8h 54m
1 stop
SFO11:54 amSan Francisco
$375
Find similar
WestJet
Aug 21
SAN1:00 pmSan Diego
13h 14m
2 stops
YXU5:14 amLondon
Oct 24
YXU6:00 amLondon
10h 20m
1 stop
SAN1:20 pmSan Diego
$382
Find similar

United Airlines flights from California to London, Ontario

Our best United Airlines deals on California to London, Ontario flight tickets
United Airlines
Sep 14
LAX12:56 amLos Angeles
11h 21m
2 stops
YXU3:17 pmLondon
Sep 22
YXU10:00 amLondon
7h 43m
1 stop
LAX2:43 pmLos Angeles
$578
Find similar
United Airlines
Aug 21
SAN10:30 pmSan Diego
13h 32m
2 stops
YXU3:02 pmLondon
Oct 24
YXU3:40 pmLondon
11h 35m
2 stops
SAN12:15 amSan Diego
$583
Find similar
United Airlines
Sep 14
LAX12:56 amLos Angeles
11h 21m
2 stops
YXU3:17 pmLondon
Sep 22
YXU6:10 amLondon
13h 53m
2 stops
LAX5:03 pmLos Angeles
$593
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from California to London, Ontario 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, momondo users made 832,500 searches. Data last updated August 2, 2025.
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 9/18

10:15 am-5:12 am

2 stops15h 57m

London

Sun 9/21

6:00 am-11:54 am

1 stop8h 54m

$362

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Mon 9/8

10:15 am-5:12 am

2 stops15h 57m

London

Tue 9/16

6:00 am-11:54 am

1 stop8h 54m

$365

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Mon 9/8

10:15 am-5:12 am

2 stops15h 57m

London

Tue 9/16

8:00 pm-11:54 am

1 stop18h 54m

$369

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Mon 9/8

6:05 pm-5:12 am

1 stop8h 07m

London

Tue 9/16

6:00 am-11:54 am

1 stop8h 54m

$372

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Mon 9/8

6:05 pm-5:12 am

1 stop8h 07m

London

Tue 9/16

6:00 am-11:54 am

1 stop8h 54m

$375

San DiegoLondon

SAN - YXU

SANYXU

San Diego

Wed 8/20

6:15 am-9:17 am

2 stops24h 02m

London

Fri 10/24

6:15 am-3:50 pm

2 stops12h 35m

$553

Los AngelesLondon

LAX - YXU

LAXYXU

Los Angeles

Sun 9/14

12:56 am-3:17 pm

2 stops11h 21m

London

Mon 9/22

10:00 am-2:43 pm

1 stop7h 43m

$578

San DiegoLondon

SAN - YXU

SANYXU

San Diego

Thu 8/21

10:30 pm-3:02 pm

2 stops13h 32m

London

Fri 10/24

3:40 pm-12:15 am

2 stops11h 35m

$583

San DiegoLondon

SAN - YXU

SANYXU

San Diego

Fri 8/15

10:20 pm-5:07 pm

2 stops15h 47m

London

Mon 8/18

9:55 am-7:38 pm

2 stops12h 43m

$873

San DiegoLondon

SAN - YXU

SANYXU

San Diego

Fri 8/15

2:05 pm-5:14 am

1 stop12h 09m

London

Mon 8/18

6:00 am-1:20 pm

1 stop10h 20m

$1,377

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 16 resultsSorted by cheapest first
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See travel insights to London from

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

What is the cheapest day to depart on your flight to London, Ontario?

According to our data, Thursday is the cheapest day to fly to London, Ontario from California. The lowest ticket price found for a Thursday departure recently was $492. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. Be sure to avoid booking your departure on a Wednesday as prices are generally higher than usual. According to our data, the average ticket price to London, Ontario on Wednesday is $543.

What is the cheapest time of day to depart on your flight to London, Ontario?

In the evening is the cheapest time of day to fly from California to London, Ontario when you can find flight prices for as low as $338. Flying to London, Ontario in the evening is an ideal time because this is during off-peak travel hours. In the morning is when there is more demand to fly to London, Ontario, so prices are often more expensive at around $568 per ticket.

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

You could potentially save up to 34% 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

$172

Fastest flight time

8h 07m

Direct flights

None

Airports in London, Ontario

1 airport
The best one-way flight to London, Ontario from California in the past 72 hours is $172. The best round-trip flight deal from California to London, Ontario found on momondo in the last 72 hours is $362.
The fastest flight from California to London, Ontario takes 8h 07m
There are no direct flights from California to London, Ontario. Popular non-direct routes for this connection are San Francisco Airport - London Airport, San Diego Airport - London Airport and Los Angeles Airport - London Airport.
There is 1 airport near London, Ontario: London (YXU)
Search flight deals

  • 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?

  • 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
Air CanadaPriceFrom $138Free CancellationRating
7.1
9,855 reviews
Search Air Canada flights
WestJetPriceFrom $162Free CancellationRating
7.2
2,980 reviews
Search WestJet flights
United AirlinesPriceFrom $183Free CancellationRating
7.4
8,904 reviews
Search United Airlines flights

Traveling to a place near London?

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

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.

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