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Cheap flights from San Diego to Ontario from $89

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 2/1. 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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Cheap round-trip flights

Enter your travel dates to find the best prices.
WestJet Logo
2:05 pm - 5:10 pm
SAN
-
YHM
24h 05m1 stop
WestJet Logo
6:10 pm - 12:13 pm
YHM
-
SAN
21h 03m2 stops
$388WestJet
Wed, May 20 - Wed, May 27
WestJet Logo
2:05 pm - 5:10 pm
SAN
-
YHM
24h 05m1 stop
WestJet Logo
6:10 pm - 1:20 pm
YHM
-
SAN
22h 10m1 stop
$389WestJet
Wed, May 20 - Wed, May 27
American Airlines Logo
2:06 pm - 3:08 pm
SAN
-
YUL
22h 02m1 stop
American Airlines Logo
2:25 pm - 8:36 pm
YUL
-
SAN
9h 11m1 stop
$409American Airlines
Sat, Jan 31 - Fri, Feb 6
Delta Logo
7:00 am - 10:42 pm
SAN
-
YYZ
12h 42m2 stops
Delta Logo
7:45 am - 6:00 pm
YYZ
-
SAN
13h 15m2 stops
$414Delta
Thu, Feb 5 - Mon, Feb 9
Delta Logo
6:55 pm - 9:04 am
SAN
-
YYZ
11h 09m2 stops
Delta Logo
10:05 am - 6:00 pm
YYZ
-
SAN
10h 55m2 stops
$415Delta
Thu, Jan 22 - Wed, Jan 28
Air Canada Logo
12:40 pm - 8:30 pm
SAN
-
YYZ
4h 50mnonstop
Air Canada Logo
9:15 am - 11:53 am
YYZ
-
SAN
5h 38mnonstop
$420Air Canada
Thu, Jan 22 - Wed, Jan 28
American Airlines Logo
3:23 pm - 3:09 pm
SAN
-
YUL
20h 46m1 stop
American Airlines Logo
7:30 am - 6:50 pm
YUL
-
SAN
14h 20m1 stop
$425American Airlines
Fri, Feb 13 - Tue, Feb 17
Air Canada Logo
7:00 am - 7:52 pm
SAN
-
YTZ
9h 52m1 stop
Air Canada Logo
7:50 am - 4:05 pm
YTZ
-
SAN
11h 15m2 stops
$490Air Canada
Tue, May 5 - Tue, May 12
United Airlines Logo
6:00 pm - 6:35 pm
SAN
-
YQT
21h 35m3 stops
United Airlines Logo
5:00 am - 10:37 pm
YQT
-
SAN
20h 37m2 stops
$632United Airlines
Wed, Feb 4 - Wed, Feb 11
United Airlines Logo
10:40 pm - 3:16 pm
SAN
-
YSB
13h 36m2 stops
United Airlines Logo
9:45 am - 8:39 pm
YSB
-
SAN
13h 54m3 stops
$1,017United Airlines
Tue, Apr 21 - Fri, Apr 24

Alaska Airlines flights from San Diego to Region of Ontario

Our best Alaska Airlines deals on San Diego to Region of Ontario flight tickets
Alaska Airlines
Feb 11
SAN7:03 pmSan Diego
17h 32m
1 stop
YYZ3:35 pmToronto Pearson Intl
Feb 17
YYZ4:45 pmToronto Pearson Intl
9h 18m
1 stop
SAN11:03 pmSan Diego
$406
Find similar
Alaska Airlines
Feb 20
SAN6:03 pmSan Diego
18h 32m
2 stops
YYZ3:35 pmToronto Pearson Intl
Feb 27
YYZ4:45 pmToronto Pearson Intl
20h 19m
1 stop
SAN10:04 amSan Diego
$418
Find similar
Alaska Airlines
Feb 23
SAN8:04 pmSan Diego
16h 31m
2 stops
YYZ3:35 pmToronto Pearson Intl
Feb 26
YYZ4:45 pmToronto Pearson Intl
18h 41m
2 stops
SAN8:26 amSan Diego
$433
Find similar

Air Canada flights from San Diego to Region of Ontario

Our best Air Canada deals on San Diego to Region of Ontario flight tickets
Air Canada
Jan 22
SAN12:40 pmSan Diego
4h 50m
YYZ8:30 pmToronto Pearson Intl
Jan 28
YYZ9:15 amToronto Pearson Intl
5h 38m
SAN11:53 amSan Diego
$420
Find similar
Air Canada
May 5
SAN1:15 pmSan Diego
4h 56m
YYZ9:11 pmToronto Pearson Intl
May 12
YYZ9:55 amToronto Pearson Intl
5h 23m
SAN12:18 pmSan Diego
$440
Find similar
Air Canada
May 1
SAN1:15 pmSan Diego
4h 56m
YYZ9:11 pmToronto Pearson Intl
May 7
YYZ9:55 amToronto Pearson Intl
5h 23m
SAN12:18 pmSan Diego
$441
Find similar

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 December 23, 2025.
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 DiegoHamilton

SAN - YHM

SANYHM

San Diego

Wed 5/20

2:05 pm-5:10 pm

1 stop24h 05m

Hamilton

Wed 5/27

6:10 pm-12:13 pm

2 stops21h 03m

$388

San DiegoHamilton

SAN - YHM

SANYHM

San Diego

Wed 5/20

2:05 pm-5:10 pm

1 stop24h 05m

Hamilton

Wed 5/27

6:10 pm-1:20 pm

1 stop22h 10m

$389

San DiegoMontreal

SAN - YUL

SANYUL

San Diego

Sat 1/31

2:06 pm-3:08 pm

1 stop22h 02m

Montreal Pierre Elliott Trudeau Intl

Fri 2/6

2:25 pm-8:36 pm

1 stop9h 11m

$409

San DiegoToronto

SAN - YYZ

SANYYZ

San Diego

Thu 2/5

7:00 am-10:42 pm

2 stops12h 42m

Toronto Pearson Intl

Mon 2/9

7:45 am-6:00 pm

2 stops13h 15m

$414

San DiegoToronto

SAN - YYZ

SANYYZ

San Diego

Thu 1/22

6:55 pm-9:04 am

2 stops11h 09m

Toronto Pearson Intl

Wed 1/28

10:05 am-6:00 pm

2 stops10h 55m

$415

San DiegoToronto

SAN - YYZ

SANYYZ

San Diego

Thu 1/22

12:40 pm-8:30 pm

Nonstop4h 50m

Toronto Pearson Intl

Wed 1/28

9:15 am-11:53 am

Nonstop5h 38m

$420

San DiegoMontreal

SAN - YUL

SANYUL

San Diego

Fri 2/13

3:23 pm-3:09 pm

1 stop20h 46m

Montreal Pierre Elliott Trudeau Intl

Tue 2/17

7:30 am-6:50 pm

1 stop14h 20m

$425

San DiegoToronto

SAN - YTZ

SANYTZ

San Diego

Tue 5/5

7:00 am-7:52 pm

1 stop9h 52m

Toronto Island

Tue 5/12

7:50 am-4:05 pm

2 stops11h 15m

$490

San DiegoThunder Bay

SAN - YQT

SANYQT

San Diego

Wed 2/4

6:00 pm-6:35 pm

3 stops21h 35m

Thunder Bay

Wed 2/11

5:00 am-10:37 pm

2 stops20h 37m

$632

San DiegoSudbury

SAN - YSB

SANYSB

San Diego

Tue 4/21

10:40 pm-3:16 pm

2 stops13h 36m

Sudbury

Fri 4/24

9:45 am-8:39 pm

3 stops13h 54m

$1,017

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 $293. 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, 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 $423. 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 Tuesday will generally be more expensive and average around $630. 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 in the afternoon. momondo users have found flights departing from San Diego to Region of Ontario in the afternoon for as low as $264. 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 $975.

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 $406 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 $305 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?

You could potentially save up to 41% 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

$338

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 $338. The best round-trip flight deal from San Diego to Region of Ontario found on momondo in the last 72 hours is $538.
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 Montreal Pierre Elliott Trudeau Intl (YUL), 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
Air TransatPriceFrom $146Free CancellationRating
7.8
484 reviews
Search Air Transat flights
Porter AirlinesPriceFrom $148Free CancellationRating
8.0
399 reviews
Search Porter Airlines flights
Air CanadaPriceFrom $149Free CancellationRating
7.1
10,551 reviews
Search Air Canada flights
United AirlinesPriceFrom $219Free CancellationRating
7.4
9,105 reviews
Search United Airlines flights
DeltaPriceFrom $288Free CancellationRating
7.9
8,014 reviews
Search Delta flights
American AirlinesPriceFrom $319Free CancellationRating
7.2
11,054 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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