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San Diego

$176+ 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 2/9. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — SAN
Jan 14 — Jan 211
Wed 1/14
Wed 1/21
1 adult, Economy
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Cheap 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 December 15, 2025.

This American Airlines deal was found by Cheapflights users on 12/14. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/236:10 amYYZ - SAN
1 stop12h 38mAmerican Airlines
Tue 1/66:20 amSAN - YYZ
1 stop12h 03mAmerican Airlines
Deal found 12/14$439
This United Airlines deal was found by Cheapflights users on 12/14. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/215:55 pmYYZ - SAN
1 stop9h 20mUnited Airlines
Wed 12/2412:56 pmSAN - YYZ
1 stop7h 50mUnited Airlines
Deal found 12/14$443
This United Airlines deal was found by Cheapflights users on 12/14. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/234:10 pmYYZ - SAN
1 stop7h 37mUnited Airlines
Tue 1/66:00 pmSAN - YYZ
2 stops14h 48mUnited Airlines
Deal found 12/14$444
This United Airlines deal was found by Cheapflights users on 12/13. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/185:30 pmYYZ - SAN
1 stop8h 21mUnited Airlines
Thu 12/2512:11 pmSAN - YYZ
1 stop7h 26mUnited Airlines
Deal found 12/13$450
This Air Canada deal was found by Cheapflights users on 12/13. 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.
Thu 12/189:15 amYYZ - SAN
Nonstop5h 38mAir Canada
Thu 12/2512:40 pmSAN - YYZ
Nonstop4h 50mAir Canada
Deal found 12/13$460
This Kiwi.com deal was found by Cheapflights users on 12/14. 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 12/309:35 amYYZ - SAN
1 stop29h 36mMultiple Airlines
Tue 1/69:24 pmSAN - YYZ
1 stop15h 11mMultiple Airlines
Deal found 12/14$476
This Air Canada deal was found by Cheapflights users on 12/14. 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.
Tue 12/169:15 amYYZ - SAN
Nonstop5h 38mAir Canada
Tue 12/2312:40 pmSAN - YYZ
Nonstop4h 50mAir Canada
Deal found 12/14$494
This Kiwi.com deal was found by Cheapflights users on 12/15. 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 12/3110:50 pmYYZ - SAN
2 stops16h 21mMultiple Airlines
Wed 1/79:02 pmSAN - YYZ
1 stop30h 18mMultiple Airlines
Deal found 12/15$495
This American Airlines deal was found by Cheapflights users on 12/13. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/186:10 amYYZ - SAN
1 stop17h 05mAmerican Airlines
Thu 1/13:38 pmSAN - YYZ
2 stops16h 31mAmerican Airlines
Deal found 12/13$497
This United Airlines deal was found by Cheapflights users on 12/14. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/169:15 amYYZ - SAN
Nonstop5h 38mUnited Airlines
Tue 12/236:30 amSAN - YYZ
1 stop13h 11mUnited Airlines
Deal found 12/14$499
This Kiwi.com deal was found by Cheapflights users on 12/13. 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 12/317:15 amYYZ - SAN
2 stops19h 44mMultiple Airlines
Tue 1/69:24 pmSAN - YYZ
1 stop15h 11mMultiple Airlines
Deal found 12/13$503
This Kiwi.com deal was found by Cheapflights users on 12/14. 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 12/319:30 amYOW - SAN
1 stop13h 49mMultiple Airlines
Fri 1/98:32 pmSAN - YOW
2 stops39h 13mMultiple Airlines
Deal found 12/14$575

Find 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 December 15, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$315
(Kiwi.com)

One-way from

$176
(Kiwi.com)

Popular in

December

Cheapest in

April

Average price

$498

Good round-trip deal

$447 or less

Good one-way deal

$262 or less
Provider with most accurate pricing for Toronto (YTO)-San Diego flight deals.
Search Deals
Provider most trusted by Cheapflights users for Toronto (YTO)-San Diego flights.
Search Deals
From Ontario to San Diego
Search Deals
One-way flight from Ontario to San Diego
Search Deals
Highest demand for flights based on searches. 13% potential increase in price ($55 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($14 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals
Price to beat on a round-trip flight from Ontario to San Diego.
Search Deals
Price to beat on a one-way flight from Ontario to San Diego.
Search Deals

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 December 15, 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

OttawaSan Diego

YOW - SAN

YOWSAN

Ottawa

Sun 3/8

5:45 pm-11:47 am

1 stop21h 02m

San Diego

Fri 3/13

12:35 pm-12:40 am

1 stop9h 05m

$330

OttawaSan Diego

YOW - SAN

YOWSAN

Ottawa

Sun 1/11

5:45 pm-11:45 am

1 stop21h 00m

San Diego

Mon 1/19

12:35 pm-12:40 am

1 stop9h 05m

$348

TorontoSan Diego

YYZ - SAN

YYZSAN

Toronto Pearson Intl

Tue 1/20

4:45 pm-8:58 pm

1 stop31h 13m

San Diego

Fri 1/23

7:03 pm-3:35 pm

1 stop17h 32m

$360

TorontoSan Diego

YTZ - SAN

YTZSAN

Toronto Island

Tue 5/5

7:50 am-6:41 pm

2 stops13h 51m

San Diego

Tue 5/12

7:00 am-9:32 pm

2 stops11h 32m

$368

OttawaSan Diego

YOW - SAN

YOWSAN

Ottawa

Wed 1/14

7:45 am-5:24 pm

1 stop12h 39m

San Diego

Wed 1/21

12:40 pm-11:08 pm

1 stop7h 28m

$368

TorontoSan Diego

YYZ - SAN

YYZSAN

Toronto Pearson Intl

Sat 3/14

4:45 pm-11:44 pm

1 stop9h 59m

San Diego

Wed 3/18

8:50 pm-3:35 pm

1 stop15h 45m

$368

MontrealSan Diego

YUL - SAN

YULSAN

Montreal Pierre Elliott Trudeau Intl

Wed 1/7

2:40 pm-8:51 pm

1 stop9h 11m

San Diego

Thu 3/19

11:55 am-11:40 pm

1 stop8h 45m

$378

OttawaSan Diego

YOW - SAN

YOWSAN

Ottawa

Fri 3/6

7:15 pm-10:47 am

2 stops42h 32m

San Diego

Fri 3/13

12:35 pm-12:39 am

2 stops33h 04m

$381

TorontoSan Diego

YYZ - SAN

YYZSAN

Toronto Pearson Intl

Wed 2/25

12:11 pm-10:20 pm

2 stops13h 09m

San Diego

Wed 3/4

11:16 am-11:57 pm

1 stop9h 41m

$384

MontrealSan Diego

YUL - SAN

YULSAN

Montreal Pierre Elliott Trudeau Intl

Mon 3/16

12:55 pm-10:49 pm

1 stop12h 54m

San Diego

Fri 3/20

10:10 pm-11:57 am

1 stop10h 47m

$385

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/13

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, July is the cheapest month in which you can book a flight from Region of Ontario to San Diego (average of $96). Flying from Region of Ontario to San Diego in November is currently the most expensive (average of $259). 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 December 15, 2025.

It’s typically best to fly out from Region of Ontario to San Diego in the evening. Doing so could potentially save you 32% on the flight price compared to flying in the afternoon, which is usually more expensive.

What is the cheapest day to fly from Region of Ontario to San Diego?

Use this chart to determine the cheapest time to fly round-trip from Ontario to San Diego. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Region of Ontario to San Diego flight should consider departing on Wednesday evenings when fares are most often at their lowest. Sunday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

How much does it cost to fly round-trip from Region of Ontario to San Diego?

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 $368, WestJet can have you in San Diego from Region of Ontario in 13h 51m. The distance from Region of Ontario to San Diego is about 2163 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 Porter Airlines, with whom users have recently found tickets for as low as $130. However, be on the lookout for offers from WestJet and United 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 cheapest flights from Region of Ontario to San Diego?

    On average you can expect to pay $1,061 for a flight from Region of Ontario to San Diego. The cheapest flight overall is $214 while the most popular route, (Toronto Pearson Intl - San Diego) is currently priced at $209.

  • 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, July is the cheapest month in which you can book a flight from Region of Ontario to San Diego (average of $96). Flying from Region of Ontario to San Diego in November is currently the most expensive (average of $259). 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
Coronado
National City
La Mesa
Poway
Julian
Lemon Grove

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Ontario to San Diego

See prices for flight routes from nearby airports that may be better suited for you.
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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 December 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
Porter AirlinesCheapest$115Average$290FlexibilityNo cancel feeOn-time52%
Air CanadaCheapest$221Average$512FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$252Average$358FlexibilityNo cancel feeOn-time69%
DeltaCheapest$264Average$396FlexibilityNo cancel feeOn-timeN/A
Air TransatCheapest$288Average$319FlexibilityNo cancel feeOn-time50%

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