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Cheap flights from San Diego to Ontario from $105

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from San Diego to Ontario departing on 3/14. 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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0 bags

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Find the cheapest flights from San Diego to Ontario

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
9:56 pm - 6:43 am
SAN
-
YYZ
29h 47m
1 stop
Multiple Airlines Logo
9:35 am - 5:40 pm
YYZ
-
SAN
11h 05m
1 stop
$271Multiple Airlines
Sun, Apr 12 - Sat, Apr 18
Multiple Airlines Logo
2:47 pm - 6:55 am
SAN
-
YYZ
13h 08m
2 stops
Multiple Airlines Logo
9:45 am - 5:40 pm
YYZ
-
SAN
10h 55m
1 stop
$279Multiple Airlines
Wed, May 6 - Mon, May 11
American Airlines Logo
3:12 pm - 11:44 am
SAN
-
YUL
17h 32m
1 stop
American Airlines Logo
12:30 pm - 11:33 pm
YUL
-
SAN
14h 03m
1 stop
$352American Airlines
Fri, Apr 17 - Sat, May 2
American Airlines Logo
1:03 pm - 11:44 am
SAN
-
YUL
19h 41m
1 stop
American Airlines Logo
12:30 pm - 11:33 pm
YUL
-
SAN
14h 03m
1 stop
$355American Airlines
Tue, Apr 7 - Sat, Apr 18
WestJet Logo
3:30 pm - 7:50 pm
SAN
-
YKF
25h 20m
1 stop
WestJet Logo
6:00 am - 1:20 pm
YKF
-
SAN
10h 20m
1 stop
$400WestJet
Wed, Jun 17 - Mon, Jun 22
WestJet Logo
3:30 pm - 5:15 pm
SAN
-
YHM
22h 45m
1 stop
WestJet Logo
6:10 pm - 1:20 pm
YHM
-
SAN
22h 10m
1 stop
$418WestJet
Thu, Jun 18 - Mon, Jun 22
Air Canada Logo
7:00 am - 3:31 pm
SAN
-
YUL
5h 31mnonstop
Air Canada Logo
5:45 pm - 8:43 pm
YUL
-
SAN
5h 58mnonstop
$440Air Canada
Mon, May 11 - Thu, May 14
Air Canada Logo
7:00 am - 3:33 pm
SAN
-
YUL
5h 33mnonstop
Air Canada Logo
5:45 pm - 8:39 pm
YUL
-
SAN
5h 54mnonstop
$441Air Canada
Fri, Jul 17 - Sun, Jul 26
United Airlines Logo
6:20 am - 10:59 pm
SAN
-
YQT
13h 39m
2 stops
United Airlines Logo
5:00 am - 8:39 pm
YQT
-
SAN
18h 39m
2 stops
$673United Airlines
Wed, Apr 8 - Sat, Apr 11
United Airlines Logo
6:20 am - 10:59 pm
SAN
-
YQT
13h 39m
2 stops
United Airlines Logo
11:10 am - 9:01 pm
YQT
-
SAN
12h 51m
2 stops
$674United Airlines
Wed, Apr 8 - Sat, Apr 11

Delta flights from San Diego to Region of Ontario

Our best Delta deals on San Diego to Region of Ontario flight tickets
Delta
Mar 16
SAN9:55 pmSan Diego
17h 40m
2 stops
YUL6:35 pmMontreal Pierre Elliott Trudeau Intl
Mar 31
YUL9:20 amMontreal Pierre Elliott Trudeau Intl
16h 49m
2 stops
SAN11:09 pmSan Diego
$505
Delta
Mar 17
SAN10:10 pmSan Diego
17h 25m
2 stops
YUL6:35 pmMontreal Pierre Elliott Trudeau Intl
Mar 31
YUL9:20 amMontreal Pierre Elliott Trudeau Intl
16h 49m
2 stops
SAN11:09 pmSan Diego
$506
Delta
Mar 16
SAN9:55 pmSan Diego
17h 40m
2 stops
YUL6:35 pmMontreal Pierre Elliott Trudeau Intl
Apr 1
YUL7:00 amMontreal Pierre Elliott Trudeau Intl
19h 48m
2 stops
SAN11:48 pmSan Diego
$526

WestJet flights from San Diego to Region of Ontario

Our best WestJet deals on San Diego to Region of Ontario flight tickets
WestJet
Jun 17
SAN3:30 pmSan Diego
25h 20m
1 stop
YKF7:50 pmToronto Region of Waterloo Intl
Jun 22
YKF6:00 amToronto Region of Waterloo Intl
10h 20m
1 stop
SAN1:20 pmSan Diego
$400
WestJet
Jun 18
SAN3:30 pmSan Diego
22h 45m
1 stop
YHM5:15 pmHamilton
Jun 22
YHM6:10 pmHamilton
22h 10m
1 stop
SAN1:20 pmSan Diego
$418
WestJet
Jun 17
SAN3:30 pmSan Diego
22h 45m
1 stop
YHM5:15 pmHamilton
Jun 22
YHM6:10 pmHamilton
22h 10m
1 stop
SAN1:20 pmSan Diego
$423

momondo Fare Finder

 
Customize your flight search to find flights from San Diego to Region of 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 February 4, 2026.
Use the filters below to find and compare flights from San Diego to Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

San DiegoToronto

SAN - YYZ

SANYYZ

San Diego

Sun 4/12

9:56 pm-6:43 am

1 stop29h 47m

Toronto Pearson Intl

Sat 4/18

9:35 am-5:40 pm

1 stop11h 05m

$271

San DiegoToronto

SAN - YYZ

SANYYZ

San Diego

Wed 5/6

2:47 pm-6:55 am

2 stops13h 08m

Toronto Pearson Intl

Mon 5/11

9:45 am-5:40 pm

1 stop10h 55m

$279

San DiegoMontreal

SAN - YUL

SANYUL

San Diego

Fri 4/17

3:12 pm-11:44 am

1 stop17h 32m

Montreal Pierre Elliott Trudeau Intl

Sat 5/2

12:30 pm-11:33 pm

1 stop14h 03m

$352

San DiegoMontreal

SAN - YUL

SANYUL

San Diego

Tue 4/7

1:03 pm-11:44 am

1 stop19h 41m

Montreal Pierre Elliott Trudeau Intl

Sat 4/18

12:30 pm-11:33 pm

1 stop14h 03m

$355

San DiegoToronto

SAN - YKF

SANYKF

San Diego

Wed 6/17

3:30 pm-7:50 pm

1 stop25h 20m

Toronto Region of Waterloo Intl

Mon 6/22

6:00 am-1:20 pm

1 stop10h 20m

$400

San DiegoHamilton

SAN - YHM

SANYHM

San Diego

Thu 6/18

3:30 pm-5:15 pm

1 stop22h 45m

Hamilton

Mon 6/22

6:10 pm-1:20 pm

1 stop22h 10m

$418

San DiegoMontreal

SAN - YUL

SANYUL

San Diego

Mon 5/11

7:00 am-3:31 pm

Nonstop5h 31m

Montreal Pierre Elliott Trudeau Intl

Thu 5/14

5:45 pm-8:43 pm

Nonstop5h 58m

$440

San DiegoMontreal

SAN - YUL

SANYUL

San Diego

Fri 7/17

7:00 am-3:33 pm

Nonstop5h 33m

Montreal Pierre Elliott Trudeau Intl

Sun 7/26

5:45 pm-8:39 pm

Nonstop5h 54m

$441

San DiegoThunder Bay

SAN - YQT

SANYQT

San Diego

Wed 4/8

6:20 am-10:59 pm

2 stops13h 39m

Thunder Bay

Sat 4/11

5:00 am-8:39 pm

2 stops18h 39m

$673

San DiegoThunder Bay

SAN - YQT

SANYQT

San Diego

Wed 4/8

6:20 am-10:59 pm

2 stops13h 39m

Thunder Bay

Sat 4/11

11:10 am-9:01 pm

2 stops12h 51m

$674

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Ontario from

How to get the cheapest flight ticket from San Diego to Region of 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 month to fly to Region of Ontario?

The month of March is, on average, the cheapest month to fly to Region of Ontario from San Diego, with most prices found around $288. If you aren’t able to travel during the month of March, then book flights to Region of Ontario from San Diego during April instead. Flights to Region of Ontario in April, while not as cheap as those in March, still average around $295.

What is the cheapest day to depart on your flight to Region of Ontario?

According to our data, Wednesday is the cheapest day to fly to Region of Ontario from San Diego. The lowest ticket price found for a Wednesday departure recently was $442. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. Flights from San Diego to Region of Ontario on a Sunday will generally be more expensive and average around $599. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

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

According to our data, the cheapest time of day to fly to Region of Ontario is at noon. momondo users have found flights departing from San Diego to Region of Ontario at noon for as low as $299. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights in the evening are often more expensive with an average ticket price of $1,033.

What is the cheapest San Diego to Ontario flight route?

Fly from San Diego to Toronto Pearson Intl for the best San Diego - Ontario flight prices

How far in advance should I book a flight to Region of Ontario?

You are more likely to see cheaper flights to Region of Ontario from San Diego when booking weeks ahead of your departure date. In general, you can expect to find flights to Region of Ontario for around $418 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Region of Ontario from San Diego for as low as $288 on momondo.

What cabin class options are available on San Diego to Ontario flights?

There are 4 cabin classes available to choose from on San Diego to Ontario flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on San Diego to Region of Ontario flights?

No. A direct flight is the cheapest option for a flight between San Diego to Region of Ontario.

Cheap San Diego to Region of Ontario flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from San Diego to Region of Ontario

Best Price Found

$191

Fastest flight time

4h 50m

Direct flights

Every day

Airports in Region of Ontario

123 airports
The best one-way flight to Region of Ontario from San Diego in the past 72 hours is $191. The best round-trip flight deal from San Diego to Region of Ontario found on momondo in the last 72 hours is $296.
The fastest flight from San Diego to Region of Ontario takes 4h 50m
Direct flights go from San Diego to Region of Ontario every day.
There are 123 airports in Region of Ontario. From San Diego there are direct flights to Toronto Pearson Intl (YYZ).
Search flight deals

  • When did momondo last update prices for flights from San Diego Airport to Ontario?

    Prices for flights from San Diego Airport to Ontario refresh daily.

  • How many operators does momondo search for flights from San Diego Airport to Ontario?

  • How old do you have to be to fly from San Diego Airport to Ontario?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from San Diego Airport to Ontario.

  • What documentation or ID do you need to fly to Ontario?

    The necessary travel and health documents for your Ontario trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

  • What is the most popular plane model from San Diego to Region of Ontario?

Best airlines flying from San Diego to Region of Ontario

Compare and see reviews for airlines that fly from San Diego to Region of Ontario with momondo
Airline
Rating
Free Cancellation
Price
Porter AirlinesPriceFrom $130Free CancellationRating
7.9
412 reviews
Search Porter Airlines flights
DeltaPriceFrom $132Free CancellationRating
7.9
8,139 reviews
Search Delta flights
Air CanadaPriceFrom $140Free CancellationRating
7.1
10,685 reviews
Search Air Canada flights
Air TransatPriceFrom $146Free CancellationRating
7.7
502 reviews
Search Air Transat flights
United AirlinesPriceFrom $157Free CancellationRating
7.4
9,236 reviews
Search United Airlines flights
American AirlinesPriceFrom $319Free CancellationRating
7.2
11,217 reviews
Search American Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from San Diego to Ontario?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Ontario from San Diego.

Can I find flights from San Diego to Ontario with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to Ontario from San Diego with this policy.

How can momondo help me find flights from San Diego to Ontario?

Once you have performed a search for San Diego to Ontario 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 San Diego to Ontario right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Ontario from San Diego. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

An easier way to manage your Region of Ontario trip

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