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San Diego

$149+ Cheap flights from Ontario to San Diego (SAN)

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 10/8. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — SAN
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
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Cheap flight deals from Ontario to San Diego

Keep the following information in mind while searching for Ontario to San Diego flight deals. Data was last updated September 11, 2025.

Round-trip from

$275
(Air Canada)

One-way from

$149
(Kiwi.com)

Popular in

September

Cheapest in

April

Average price

$456

Good round-trip deal

$481 or less

Good one-way deal

$289 or less
From Ontario to San Diego
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One-way flight from Ontario to San Diego
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Highest demand for flights based on searches. 15% potential increase in price ($70 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($8 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Price to beat on a round-trip flight from Ontario to San Diego.
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Price to beat on a one-way flight from Ontario to San Diego.
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Find flight deals from Ontario to San Diego

Cheapest flights from Ontario to San Diego
Explore the most affordable flight options available from Ontario to San Diego. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 11, 2025.

This Air Canada deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/29:00 amYYZ - SAN
Nonstop5h 38mAir Canada
Thu 11/612:25 pmSAN - YYZ
Nonstop4h 51mAir Canada
Deal found 9/8$275
This Kiwi.com deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/110:05 amYYZ - SAN
1 stop29h 28mMultiple Airlines
Wed 10/88:00 amSAN - YYZ
1 stop8h 58mMultiple Airlines
Deal found 9/8$276
This Mytrip deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/110:00 amYYZ - SAN
3 stops16h 34mMultiple Airlines
Thu 10/26:15 amSAN - YYZ
3 stops20h 36mMultiple Airlines
Deal found 9/9$278
This Kiwi.com deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/248:05 pmYYZ - SAN
1 stop15h 10mMultiple Airlines
Tue 10/288:02 amSAN - YYZ
1 stop8h 53mMultiple Airlines
Deal found 9/10$279
This Kiwi.com deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/266:30 amYYZ - SAN
2 stops27h 52mMultiple Airlines
Sun 11/28:30 amSAN - YYZ
1 stop18h 50mMultiple Airlines
Deal found 9/11$280
This Kiwi.com deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/149:30 amYYZ - SAN
1 stop14h 50mMultiple Airlines
Wed 10/228:00 amSAN - YYZ
1 stop8h 58mMultiple Airlines
Deal found 9/9$281
This Kiwi.com deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/49:35 amYYZ - SAN
2 stops31h 01mMultiple Airlines
Wed 10/88:00 amSAN - YYZ
1 stop8h 58mMultiple Airlines
Deal found 9/10$283
This Air Canada deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/412:00 pmYYZ - SAN
1 stop10h 35mAir Canada
Sat 10/118:10 amSAN - YYZ
1 stop10h 29mAir Canada
Deal found 9/9$285
This Kiwi.com deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/309:30 amYYZ - SAN
1 stop12h 07mMultiple Airlines
Wed 10/11:35 pmSAN - YYZ
2 stops13h 37mMultiple Airlines
Deal found 9/8$286
This Kiwi.com deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/159:45 amYYZ - SAN
1 stop14h 35mMultiple Airlines
Sat 10/182:05 pmSAN - YYZ
1 stop13h 07mMultiple Airlines
Deal found 9/9$287
This Mytrip deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/161:30 pmYYZ - SAN
2 stops20h 59mMultiple Airlines
Tue 9/231:35 pmSAN - YYZ
2 stops14h 17mMultiple Airlines
Deal found 9/9$288
This Air Canada deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/66:00 amYUL - SAN
1 stop8h 38mAir Canada
Sun 12/1412:25 pmSAN - YUL
1 stop9h 07mAir Canada
Deal found 9/9$302

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to San Diego 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 2,558,603 searches. Data last updated September 11, 2025.
Use the filters below to find and compare flights from Ontario to San Diego that are best for you.

Fly from

Ontario

Fly to

San Diego

Route

Depart

Return

Price

TorontoSan Diego

YYZ - SAN

YYZSAN

Toronto Pearson Intl

Fri 10/24

8:05 pm-8:51 pm

1 stop27h 46m

San Diego

Sat 11/1

5:00 pm-7:10 am

1 stop11h 10m

$281

TorontoSan Diego

YYZ - SAN

YYZSAN

Toronto Pearson Intl

Mon 11/3

6:30 am-2:55 pm

1 stop11h 25m

San Diego

Thu 11/6

12:25 pm-8:16 pm

Nonstop4h 51m

$290

TorontoSan Diego

YYZ - SAN

YYZSAN

Toronto Pearson Intl

Sun 11/23

9:00 am-11:38 am

Nonstop5h 38m

San Diego

Tue 12/2

12:25 pm-8:16 pm

Nonstop4h 51m

$298

TorontoSan Diego

YYZ - SAN

YYZSAN

Toronto Pearson Intl

Wed 10/1

7:00 pm-7:56 am

1 stop15h 56m

San Diego

Thu 10/2

11:15 am-10:48 pm

1 stop8h 33m

$298

TorontoSan Diego

YYZ - SAN

YYZSAN

Toronto Pearson Intl

Tue 10/7

2:30 pm-8:19 pm

1 stop8h 49m

San Diego

Tue 10/21

2:11 pm-11:58 pm

1 stop6h 47m

$300

TorontoSan Diego

YYZ - SAN

YYZSAN

Toronto Pearson Intl

Tue 10/14

6:15 am-2:32 pm

1 stop11h 17m

San Diego

Tue 10/21

10:20 pm-11:20 am

1 stop10h 00m

$303

TorontoSan Diego

YYZ - SAN

YYZSAN

Toronto Pearson Intl

Tue 11/11

3:30 pm-10:20 pm

1 stop9h 50m

San Diego

Tue 11/25

10:30 pm-4:02 pm

1 stop14h 32m

$303

TorontoSan Diego

YYZ - SAN

YYZSAN

Toronto Pearson Intl

Tue 11/11

9:00 pm-11:28 am

1 stop17h 28m

San Diego

Tue 11/25

12:25 pm-8:16 pm

Nonstop4h 51m

$303

TorontoSan Diego

YYZ - SAN

YYZSAN

Toronto Pearson Intl

Thu 11/6

6:10 am-9:53 pm

1 stop18h 43m

San Diego

Tue 11/11

12:25 pm-8:16 pm

Nonstop4h 51m

$303

TorontoSan Diego

YYZ - SAN

YYZSAN

Toronto Pearson Intl

Thu 11/6

6:10 am-8:05 pm

1 stop16h 55m

San Diego

Sun 11/9

6:45 am-11:46 pm

2 stops14h 01m

$303

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/9

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

Have a flexible travel schedule? Discover the best time to fly to San Diego from Ontario 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 Ontario to San Diego

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

Currently, August is the cheapest month in which you can book a flight from Region of Ontario to San Diego (average of $286). Flying from Region of Ontario to San Diego in March is currently the most expensive (average of $366). 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 ON to SAN?

Find hourly flight availability from Ontario to San Diego. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 11, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Region of Ontario to San Diego as you normally would.

Weekly flight availability from Region of Ontario to San Diego

Explore weekly flight availability from Ontario to San Diego. 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 September 11, 2025.

The most flights from CAON to SAN 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).

Related info for your journey

Find useful and relevant information for your journey from Ontario to San Diego. 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 into for flights to San Diego from Ontario?

    Most people fly into San Diego (SAN) if they book a flight to San Diego from Ontario. San Diego is conveniently located just 2.6 mi from San Diego’s city center.

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

    For as low as $298, Air Canada can have you in San Diego from Region of Ontario in 5h 38m. The distance from Region of Ontario to San Diego is about 2153 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

    The cheapest airline one-way is WestJet, with whom users have recently found tickets for as low as $175. However, be on the lookout for offers from United Airlines and American Airlines, as they are both options that can get you from Region of Ontario to San Diego for a low price.

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

    While some choose either Montreal Pierre Elliott Trudeau Intl - San Diego or Toronto Island - San Diego, Toronto Pearson Intl - San Diego is the most popular route from Region of Ontario to San Diego.

  • What are the most reliable airlines from Region of Ontario to San Diego?

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Region of Ontario to San Diego on time: Air Canada Rouge (100%), Air Canada (91%), United Airlines (82%).

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

    On average you can expect to pay $486 for a flight from Region of Ontario to San Diego. The cheapest flight overall is $191 while the most popular route, (Toronto Pearson Intl - San Diego) is currently priced at $221.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Ontario to San Diego 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 Region of Ontario to San Diego?

    Currently, August is the cheapest month in which you can book a flight from Region of Ontario to San Diego (average of $286). Flying from Region of Ontario to San Diego in March is currently the most expensive (average of $366). 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

Traveling to a place near San Diego?

Book flights to San Diego if you plan to visit one of these locations
El Cajon
Chula Vista
La Mesa
Poway
Lemon Grove
Coronado
Imperial Beach
National City
Alpine

Browse thousands of different options on Cheapflights for your next trip

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Top 5 airlines flying from Ontario to San Diego

Discover the top 5 airlines that operate flights from Ontario to San Diego. 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 2,558,603 searches. Data last updated September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
Porter AirlinesCheapest$116Average$282FlexibilityNo cancel feeOn-time52%
Air CanadaCheapest$186Average$502FlexibilityNo cancel feeOn-time67%
Air TransatCheapest$234Average$340FlexibilityNo cancel feeOn-time50%
United AirlinesCheapest$236Average$360FlexibilityNo cancel feeOn-time69%
DeltaCheapest$264Average$333FlexibilityNo cancel feeOn-timeN/A

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