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Cheap flights from San Diego to Ontario from C$ 141

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 14/3. Fares are subject to change and may not be available on all flights or dates of travel.
SAN — YYZ
26 Feb — 5 Mar1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from San Diego to Ontario

Enter your travel dates to find the best prices.

Cheapest flights from San Diego to Ontario
Explore the most affordable flight options available from San Diego to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 27 January 2026.

Mon 23/22:05 p.m.
SAN
-
YYZ
1 stop13h 38m
Multiple Airlines
Sun 1/38:00 p.m.
YYZ
-
SAN
1 stop20h 05m
Multiple Airlines
Deal found 26/1C$ 335
Mon 23/22:05 p.m.
SAN
-
YYZ
1 stop13h 38m
Multiple Airlines
Thu 5/38:35 p.m.
YYZ
-
SAN
1 stop22h 38m
Multiple Airlines
Deal found 26/1C$ 341
Thu 26/22:38 p.m.
SAN
-
YYZ
2 stops12h 35m
Multiple Airlines
Fri 6/38:00 p.m.
YYZ
-
SAN
1 stop20h 13m
Multiple Airlines
Deal found 26/1C$ 349
Sat 14/32:08 p.m.
SAN
-
YYZ
1 stop13h 12m
Multiple Airlines
Thu 19/38:00 p.m.
YYZ
-
SAN
1 stop23h 13m
Multiple Airlines
Deal found 26/1C$ 351
Thu 26/22:38 p.m.
SAN
-
YYZ
2 stops12h 35m
Multiple Airlines
Thu 5/38:35 p.m.
YYZ
-
SAN
1 stop22h 38m
Multiple Airlines
Deal found 26/1C$ 355
Sun 15/38:59 p.m.
SAN
-
YYZ
1 stop30h 44m
Multiple Airlines
Mon 23/38:00 p.m.
YYZ
-
SAN
1 stop20h 13m
Multiple Airlines
Deal found 26/1C$ 361
Thu 26/310:02 p.m.
SAN
-
YYZ
1 stop29h 41m
Multiple Airlines
Tue 31/39:35 a.m.
YYZ
-
SAN
1 stop25h 10m
Multiple Airlines
Deal found 26/1C$ 370
Mon 23/22:05 p.m.
SAN
-
YYZ
1 stop13h 38m
Multiple Airlines
Fri 27/28:00 p.m.
YYZ
-
SAN
2 stops26h 53m
Multiple Airlines
Deal found 26/1C$ 371
Sun 15/33:07 p.m.
SAN
-
YYZ
2 stops12h 06m
Multiple Airlines
Thu 19/38:00 p.m.
YYZ
-
SAN
1 stop23h 13m
Multiple Airlines
Deal found 26/1C$ 375
Mon 23/22:05 p.m.
SAN
-
YYZ
1 stop13h 38m
Multiple Airlines
Tue 3/37:15 a.m.
YYZ
-
SAN
2 stops17h 26m
Multiple Airlines
Deal found 26/1C$ 389
Tue 7/43:07 p.m.
SAN
-
YUL
1 stop17h 37m
American Airlines
Sat 18/412:30 p.m.
YUL
-
SAN
1 stop13h 46m
American Airlines
Deal found 26/1C$ 485
Tue 24/28:06 a.m.
SAN
-
YTZ
1 stop23h 29m
Multiple Airlines
Tue 3/37:00 a.m.
YTZ
-
SAN
2 stops16h 24m
Multiple Airlines
Deal found 25/1C$ 549

Find flight deals from San Diego to Ontario

Keep the following information in mind while searching for San Diego to Ontario flight deals. Data was last updated 27 January 2026.

Round-trip from

C$ 335

One-way from

C$ 141

Popular in

October

Cheapest in

March

Average price

C$ 546

Good round-trip deal

C$ 148 or less

Good one-way deal

C$ 271 or less
23/2-6/3
  • 23/2-6/3
  • 2 total stops
  • 33h 51m total
  • San Diego to Ontario
Search Deals
14/3
  • 14/3
  • 1 total stop
  • 13h 12m total
  • San Diego to Ontario
Search Deals
Highest demand for flights based on searches. 13% potential increase in price (C$ 120 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (C$ 32 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
Search Deals
Price to beat on a round-trip flight from San Diego to Ontario.
Search Deals
Price to beat on a one-way flight from San Diego to Ontario.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from San Diego to 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, Cheapflights users made 629,999 searches. Data last updated 27 January 2026.
Use the filters below to find and compare flights from San Diego to Ontario that are best for you.

Fly from

San Diego

Fly to

Ontario

Route

Depart

Return

Price

San DiegoMontreal

SAN - YUL

SANYUL

San Diego

Fri 17/4

3:07 p.m.-11:44 a.m.

1 stop17h 37m

Montreal Pierre Elliott Trudeau Intl

Sat 2/5

12:30 p.m.-11:16 p.m.

1 stop13h 46m

C$ 500

San DiegoToronto

SAN - YYZ

SANYYZ

San Diego

Mon 8/6

3:30 p.m.-5:45 a.m.

1 stop11h 15m

Toronto Pearson Intl

Thu 11/6

6:15 a.m.-2:10 p.m.

1 stop10h 55m

C$ 561

San DiegoToronto

SAN - YKF

SANYKF

San Diego

Thu 30/4

3:30 p.m.-7:50 p.m.

1 stop25h 20m

Toronto Region of Waterloo Intl

Mon 4/5

8:40 p.m.-2:10 p.m.

1 stop20h 30m

C$ 581

San DiegoToronto

SAN - YKF

SANYKF

San Diego

Thu 28/5

3:30 p.m.-7:50 p.m.

1 stop25h 20m

Toronto Region of Waterloo Intl

Thu 4/6

8:40 p.m.-2:10 p.m.

1 stop20h 30m

C$ 581

San DiegoOttawa

SAN - YOW

SANYOW

San Diego

Tue 24/2

8:00 a.m.-2:45 p.m.

2 stops27h 45m

Ottawa

Tue 3/3

3:55 p.m.-7:56 p.m.

1 stop31h 01m

C$ 582

San DiegoOttawa

SAN - YOW

SANYOW

San Diego

Thu 12/3

9:07 p.m.-12:39 a.m.

2 stops48h 32m

Ottawa

Thu 19/3

9:30 a.m.-8:45 p.m.

1 stop14h 15m

C$ 589

San DiegoToronto

SAN - YYZ

SANYYZ

San Diego

Tue 10/3

10:15 a.m.-3:35 p.m.

2 stops26h 20m

Toronto Pearson Intl

Mon 16/3

4:45 p.m.-9:51 a.m.

2 stops20h 06m

C$ 590

San DiegoToronto

SAN - YTZ

SANYTZ

San Diego

Wed 25/2

8:50 a.m.-8:52 p.m.

1 stop9h 02m

Toronto Island

Thu 5/3

8:25 a.m.-5:31 p.m.

2 stops12h 06m

C$ 611

San DiegoOttawa

SAN - YOW

SANYOW

San Diego

Fri 3/4

11:58 a.m.-9:30 p.m.

1 stop30h 32m

Ottawa

Sun 12/4

4:15 p.m.-8:09 p.m.

2 stops30h 54m

C$ 612

San DiegoMontreal

SAN - YUL

SANYUL

San Diego

Tue 24/2

10:35 p.m.-3:04 p.m.

1 stop13h 29m

Montreal Pierre Elliott Trudeau Intl

Tue 3/3

12:59 p.m.-7:24 p.m.

1 stop9h 25m

C$ 613

Flights are sorted by cheapest round-trip flights first.

Deals found on 26/1

Showing 1-10 of 60 results
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Best time to book a flight from San Diego to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from San Diego with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from San Diego to Ontario

What is the cheapest month to book a flight from San Diego to Region of Ontario?

Currently, June is the cheapest month in which you can book a flight from San Diego to Region of Ontario (average of C$ 101). Flying from San Diego to Region of Ontario in September is currently the most expensive (average of C$ 346). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from SAN to ON?

Find hourly flight availability from San Diego to Ontario. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 27 January 2026.

When flying from San Diego to Region of Ontario, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Weekly flight availability from San Diego to Region of Ontario

Explore weekly flight availability from San Diego to Ontario. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 27 January 2026.

The most flights from SAN to CAON are scheduled on a Monday (2 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (2 on average).

Reviews of airlines servicing Ontario

Get insights into the airlines that provide service to Ontario. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Ontario. Reviews last updated 27 January 2026.
Read reviews from past customers who have flown Porter Airlines,United Airlines, andAir Canada from San Diego to Ontario. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Porter Airlines
7.9
Good
412 reviews
Check prices

Boarding

8.2

Crew

8.6

Food

7.5

Comfort

7.9

Overall

7.9

Entertainment

6.9

Reviews

1 / 20
8.0
Excellent

Mohameed,Nov 2025

LAS - YYZ

It's good. Planes are new and fresh. WiFi is best and stands out
Porter Airlines
7.9
Good
412 reviews
Porter Airlines
7.9
Good
412 reviews
Check prices

Boarding

8.2

Crew

8.6

Food

7.5

Comfort

7.9

Overall

7.9

Entertainment

6.9

Reviews

1 / 20
8.0
Excellent

Mohameed,Nov 2025

LAS - YYZ

It's good. Planes are new and fresh. WiFi is best and stands out
United Airlines
7.4
Good
9,205 reviews
Porter Airlines
7.9
Good
412 reviews
Check prices

Boarding

8.2

Crew

8.6

Food

7.5

Comfort

7.9

Overall

7.9

Entertainment

6.9

Reviews

1 / 20
8.0
Excellent

Mohameed,Nov 2025

LAS - YYZ

It's good. Planes are new and fresh. WiFi is best and stands out
Air Canada
7.1
Good
10,660 reviews
Porter Airlines
7.9
Good
412 reviews
Check prices

Boarding

8.2

Crew

8.6

Food

7.5

Comfort

7.9

Overall

7.9

Entertainment

6.9

Reviews

1 / 20
8.0
Excellent

Mohameed,Nov 2025

LAS - YYZ

It's good. Planes are new and fresh. WiFi is best and stands out

Related info for your journey

Find useful and relevant information for your journey from San Diego to Ontario. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from San Diego to Ontario?

    Most people fly from San Diego (SAN) if they book a flight from San Diego to Ontario. San Diego is conveniently located just 4.2 km from San Diego’s city centre.

  • How long is the flight from San Diego to Region of Ontario?

    American Airlines, WestJet, and Alaska Airlines can get you from San Diego to Region of Ontario in just under 11h 15m. Your travel time can differ by up to 15h 05m. San Diego and Region of Ontario are separated by a distance of 3465 km. Both multi-stop and direct flights can be found to your destination and back.

  • What are the cheapest airlines to fly from San Diego to Region of Ontario one-way?

    To fly one-way, consider booking your trip with Porter Airlines, which is currently one of the cheapest options available, starting at C$ 148. United Airlines flights start at C$ 168 while deals on Air Canada start at C$ 183 one-way.

  • What are the most popular routes from San Diego to Region of Ontario?

    The most popular route from San Diego to Region of Ontario is San Diego - Toronto Pearson Intl. You may also consider San Diego - Toronto Island or San Diego - Montreal Pierre Elliott Trudeau Intl.

  • What are the cheapest flights from San Diego to Region of Ontario?

    While on average a flight from San Diego to Region of Ontario is generally C$ 245, our data shows the cheapest flight currently is C$ 148. When looking at the most popular route, (San Diego - Toronto Pearson Intl), you can expect to pay C$ 349 for that flight.

  • Can I find deals for flights from San Diego to Ontario that include hotel bookings?

    Yes. In addition to deals on San Diego to Ontario flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from San Diego to Ontario?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from San Diego to Ontario.

  • Can I find deals for business class flights from San Diego to Ontario?

    Yes. Cheapflights offers flight deals from San Diego to Ontario by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from San Diego to Region of Ontario?

    Currently, June is the cheapest month in which you can book a flight from San Diego to Region of Ontario (average of C$ 101). Flying from San Diego to Region of Ontario in September is currently the most expensive (average of C$ 346). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Alternative routes for San Diego to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
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Top 3 airlines flying from San Diego to Ontario

Discover the top 3 airlines that operate flights from San Diego to Ontario. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 629,999 searches. Data last updated 27 January 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 161AverageC$ 597FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapestC$ 218AverageC$ 479FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Porter AirlinesCheapestC$ 276AverageC$ 415FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from San Diego to Ontario?

Cheapflights makes it easy to find San Diego to Ontario flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

Why should you use Cheapflights to find cheap flight tickets from San Diego to Ontario?

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Ontario from San Diego.

Can Cheapflights find flights from San Diego to Ontario with no change fees?

Yes, we can. To see specific flights from San Diego to Ontario with no change fees, users can toggle flexible booking options after using the search form above to find flights.

Can Cheapflights notify me if prices for flights from San Diego to Ontario become cheaper?

Not ready to book yet? You can track prices for flights from San Diego to Ontario on Cheapflights with our Price Alert feature and get notified when better prices are available.

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