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Cheap flights from San Diego to Ontario from $191

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 11/7. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from San Diego to Ontario

Cheap round-trip flights

Enter your travel dates to find the best prices.
WestJet Logo
3:30 pm - 5:45 am
SAN
-
YYZ
11h 15m
1 stop
WestJet Logo
8:00 am - 2:10 pm
YYZ
-
SAN
9h 10m
1 stop
$369WestJet
Thu, Sep 10 - Sun, Sep 13
Multiple Airlines Logo
3:30 pm - 5:45 am
SAN
-
YYZ
11h 15m
1 stop
Multiple Airlines Logo
10:50 am - 8:48 pm
YYZ
-
SAN
12h 58m
2 stops
$372Multiple Airlines
Sun, Oct 11 - Thu, Oct 15
WestJet Logo
3:30 pm - 5:45 am
SAN
-
YYZ
11h 15m
1 stop
WestJet Logo
6:10 am - 2:10 pm
YYZ
-
SAN
11h 00m
2 stops
$373WestJet
Sun, Sep 13 - Sun, Sep 20
Multiple Airlines Logo
10:25 am - 1:05 am
SAN
-
YYZ
11h 40m
2 stops
Multiple Airlines Logo
7:00 am - 2:10 pm
YYZ
-
SAN
10h 10m
1 stop
$374Multiple Airlines
Thu, Oct 8 - Mon, Oct 19
Multiple Airlines Logo
9:43 pm - 1:05 am
SAN
-
YYZ
24h 22m
2 stops
Multiple Airlines Logo
8:00 am - 2:10 pm
YYZ
-
SAN
9h 10m
1 stop
$375Multiple Airlines
Mon, Sep 14 - Fri, Sep 25
WestJet Logo
3:30 pm - 5:45 am
SAN
-
YYZ
11h 15m
1 stop
WestJet Logo
7:00 am - 2:10 pm
YYZ
-
SAN
10h 10m
1 stop
$376WestJet
Wed, Sep 9 - Mon, Sep 14
Air Canada Logo
7:00 am - 3:27 pm
SAN
-
YUL
5h 27mnonstop
Air Canada Logo
5:45 pm - 8:36 pm
YUL
-
SAN
5h 51mnonstop
$441Air Canada
Sat, Oct 3 - Sat, Oct 10
Air Canada Logo
7:00 am - 10:48 pm
SAN
-
YQT
12h 48m
2 stops
Air Canada Logo
5:05 am - 12:16 pm
YQT
-
SAN
10h 11m
1 stop
$450Air Canada
Tue, Sep 29 - Wed, Sep 30
United Airlines Logo
6:40 am - 10:48 pm
SAN
-
YQT
13h 08m
2 stops
United Airlines Logo
5:05 am - 5:05 pm
YQT
-
SAN
15h 00m
2 stops
$574United Airlines
Tue, Sep 29 - Wed, Sep 30
United Airlines Logo
10:30 pm - 3:10 pm
SAN
-
YSB
13h 40m
2 stops
United Airlines Logo
10:35 am - 12:29 am
YSB
-
SAN
16h 54m
2 stops
$748United Airlines
Sun, Dec 6 - Wed, Dec 9

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WestJet flights from San Diego to Region of Ontario

Our best WestJet deals on San Diego to Region of Ontario flight tickets
WestJet
Sep 10
SAN3:30 pmSan Diego
11h 15m
1 stop
YYZ5:45 amToronto Pearson Intl
Sep 13
YYZ8:00 amToronto Pearson Intl
9h 10m
1 stop
SAN2:10 pmSan Diego
$369
WestJet
Sep 13
SAN3:30 pmSan Diego
11h 15m
1 stop
YYZ5:45 amToronto Pearson Intl
Sep 20
YYZ6:10 amToronto Pearson Intl
11h 00m
2 stops
SAN2:10 pmSan Diego
$373
WestJet
Sep 9
SAN3:30 pmSan Diego
11h 15m
1 stop
YYZ5:45 amToronto Pearson Intl
Sep 14
YYZ7:00 amToronto Pearson Intl
10h 10m
1 stop
SAN2:10 pmSan Diego
$376

Delta flights from San Diego to Region of Ontario

Our best Delta deals on San Diego to Region of Ontario flight tickets
Delta
Oct 3
SAN11:30 amSan Diego
8h 57m
1 stop
YUL11:27 pmMontreal Pierre Elliott Trudeau Intl
Oct 10
YUL6:00 amMontreal Pierre Elliott Trudeau Intl
11h 25m
1 stop
SAN2:25 pmSan Diego
$466
Delta
Oct 3
SAN11:30 amSan Diego
8h 57m
1 stop
YUL11:27 pmMontreal Pierre Elliott Trudeau Intl
Oct 18
YUL7:00 amMontreal Pierre Elliott Trudeau Intl
12h 26m
1 stop
SAN4:26 pmSan Diego
$492
Delta
Sep 1
SAN10:25 pmSan Diego
12h 16m
1 stop
YUL1:41 pmMontreal Pierre Elliott Trudeau Intl
Sep 8
YUL7:00 amMontreal Pierre Elliott Trudeau Intl
8h 25m
1 stop
SAN12:25 pmSan Diego
$501

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 July 3, 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

Cheapest round-trip

San DiegoToronto

SAN - YYZ

SANYYZ

San Diego

Thu 9/10

3:30 pm-5:45 am

1 stop11h 15m

Toronto Pearson Intl

Sun 9/13

8:00 am-2:10 pm

1 stop9h 10m

$369

San DiegoToronto

SAN - YYZ

SANYYZ

San Diego

Sun 10/11

3:30 pm-5:45 am

1 stop11h 15m

Toronto Pearson Intl

Thu 10/15

10:50 am-8:48 pm

2 stops12h 58m

$372

San DiegoToronto

SAN - YYZ

SANYYZ

San Diego

Sun 9/13

3:30 pm-5:45 am

1 stop11h 15m

Toronto Pearson Intl

Sun 9/20

6:10 am-2:10 pm

2 stops11h 00m

$373

San DiegoToronto

SAN - YYZ

SANYYZ

San Diego

Thu 10/8

10:25 am-1:05 am

2 stops11h 40m

Toronto Pearson Intl

Mon 10/19

7:00 am-2:10 pm

1 stop10h 10m

$374

San DiegoToronto

SAN - YYZ

SANYYZ

San Diego

Mon 9/14

9:43 pm-1:05 am

2 stops24h 22m

Toronto Pearson Intl

Fri 9/25

8:00 am-2:10 pm

1 stop9h 10m

$375

San DiegoToronto

SAN - YYZ

SANYYZ

San Diego

Wed 9/9

3:30 pm-5:45 am

1 stop11h 15m

Toronto Pearson Intl

Mon 9/14

7:00 am-2:10 pm

1 stop10h 10m

$376
Quickest round-trip

San DiegoMontreal

SAN - YUL

SANYUL

San Diego

Sat 10/3

7:00 am-3:27 pm

Nonstop5h 27m

Montreal Pierre Elliott Trudeau Intl

Sat 10/10

5:45 pm-8:36 pm

Nonstop5h 51m

$441

San DiegoThunder Bay

SAN - YQT

SANYQT

San Diego

Tue 9/29

7:00 am-10:48 pm

2 stops12h 48m

Thunder Bay

Wed 9/30

5:05 am-12:16 pm

1 stop10h 11m

$450

San DiegoThunder Bay

SAN - YQT

SANYQT

San Diego

Tue 9/29

6:40 am-10:48 pm

2 stops13h 08m

Thunder Bay

Wed 9/30

5:05 am-5:05 pm

2 stops15h 00m

$574

San DiegoSudbury

SAN - YSB

SANYSB

San Diego

Sun 12/6

10:30 pm-3:10 pm

2 stops13h 40m

Sudbury

Wed 12/9

10:35 am-12:29 am

2 stops16h 54m

$748

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 September is, on average, the cheapest month to fly to Region of Ontario from San Diego, with most prices found around $120. If you aren’t able to travel during the month of September, 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 September, still average around $121.

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

According to our data, Friday is the cheapest day to fly to Region of Ontario from San Diego. The lowest ticket price found for a Friday departure recently was $530. 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 $669. 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 $534. 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 morning are often more expensive with an average ticket price of $619.

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 from San Diego to 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 $506 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 $395 on momondo.

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

There are 3 cabin classes available to choose from on San Diego to Region of 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?

You could potentially save up to 38% on your flight if you consider stops on a San Diego to Region of Ontario flight.

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

$290

Fastest flight time

4h 57m

Direct flights

Every day

Airports in Region of Ontario

125 airports
The best one-way flight to Region of Ontario from San Diego in the past 72 hours is $290. The best round-trip flight deal from San Diego to Region of Ontario found on momondo in the last 72 hours is $519.
The fastest flight from San Diego to Region of Ontario takes 4h 57m
Direct flights go from San Diego to Region of Ontario every day.
There are 125 airports in Region of Ontario. From San Diego there are direct flights to Toronto Pearson Intl (YYZ).
Search flight deals

Frequently asked questions about flying from San Diego to Ontario

  • 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
DeltaPriceFrom $213Free CancellationRating
7.8
8,452 reviews
Search Delta flights
Air CanadaPriceFrom $264Free CancellationRating
7.1
11,291 reviews
Search Air Canada flights
United AirlinesPriceFrom $320Free CancellationRating
7.4
9,929 reviews
Search United Airlines flights
American AirlinesPriceFrom $388Free CancellationRating
7.1
11,766 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.

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