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San Diego

$163+ 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 12/14. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — SAN
nov. 28 — dic. 51
vie. 11/28
vie. 12/5
1 adult, Economy
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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 octubre 29, 2025.

This Kiwi.com deal was found by Cheapflights users on 10/28. 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.
vie. 12/129:35 amYYZ - SAN
1 stop9h 45mMultiple Airlines
lun. 12/151:33 pmSAN - YYZ
1 stop13h 47mMultiple Airlines
Deal found 10/28$307
This American Airlines deal was found by Cheapflights users on 10/27. 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.
mar. 11/1811:32 amYYZ - SAN
1 stop12h 16mAmerican Airlines
sáb. 12/66:15 amSAN - YYZ
1 stop12h 14mAmerican Airlines
Deal found 10/27$311
This Kiwi.com deal was found by Cheapflights users on 10/28. 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.
jue. 11/207:55 pmYYZ - SAN
1 stop22h 12mMultiple Airlines
jue. 11/278:39 amSAN - YYZ
2 stops19h 19mMultiple Airlines
Deal found 10/28$312
This Kiwi.com deal was found by Cheapflights users on 10/28. 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.
lun. 12/17:55 pmYYZ - SAN
1 stop27h 23mMultiple Airlines
jue. 12/43:47 pmSAN - YYZ
1 stop11h 33mMultiple Airlines
Deal found 10/28$313
This Kiwi.com deal was found by Cheapflights users on 10/27. 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.
vie. 11/219:45 amYYZ - SAN
1 stop8h 22mMultiple Airlines
jue. 12/113:47 pmSAN - YYZ
1 stop25h 45mMultiple Airlines
Deal found 10/27$316
This Kiwi.com deal was found by Cheapflights users on 10/27. 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.
mar. 11/1812:40 pmYYZ - SAN
1 stop23h 00mMultiple Airlines
jue. 12/113:47 pmSAN - YYZ
1 stop25h 45mMultiple Airlines
Deal found 10/27$321
This Kiwi.com deal was found by Cheapflights users on 10/28. 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.
vie. 12/129:35 amYYZ - SAN
1 stop9h 45mMultiple Airlines
vie. 12/197:21 pmSAN - YYZ
1 stop7h 59mMultiple Airlines
Deal found 10/28$322
This American Airlines deal was found by Cheapflights users on 10/28. 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.
mar. 11/1811:32 amYYZ - SAN
1 stop12h 16mAmerican Airlines
jue. 12/116:15 amSAN - YYZ
1 stop12h 14mAmerican Airlines
Deal found 10/28$324
This Trip.com deal was found by Cheapflights users on 10/27. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 12/49:45 amYYZ - SAN
2 stops17h 14mMultiple Airlines
jue. 12/181:06 pmSAN - YYZ
1 stop14h 41mMultiple Airlines
Deal found 10/27$325
This Kiwi.com deal was found by Cheapflights users on 10/27. 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.
mar. 11/1812:40 pmYYZ - SAN
1 stop23h 00mMultiple Airlines
vie. 12/121:33 pmSAN - YYZ
1 stop13h 47mMultiple Airlines
Deal found 10/27$326
This Delta deal was found by Cheapflights users on 10/28. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 11/276:00 amYUL - SAN
1 stop11h 15mDelta
jue. 12/412:24 pmSAN - YUL
1 stop8h 35mDelta
Deal found 10/28$380
This American Airlines deal was found by Cheapflights users on 10/27. 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.
lun. 12/14:00 pmYUL - SAN
1 stop19h 34mAmerican Airlines
lun. 12/810:23 pmSAN - YUL
1 stop12h 26mAmerican Airlines
Deal found 10/27$383

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 octubre 29, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$307
(Kiwi.com)

One-way from

$163
(Kiwi.com)

Popular in

December

Cheapest in

April

Average price

$385

Good round-trip deal

$378 or less

Good one-way deal

$229 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. 9% potential increase in price ($37 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($9 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 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 octubre 29, 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

HamiltonSan Diego

YHM - SAN

YHMSAN

Hamilton

jue. 1/22

6:10 pm-11:45 am

1 stop20h 35m

San Diego

mié. 1/28

12:35 pm-5:17 pm

1 stop25h 42m

$356

MontrealSan Diego

YUL - SAN

YULSAN

Montreal Pierre Elliott Trudeau Intl

vie. 12/5

7:00 am-3:21 pm

1 stop11h 21m

San Diego

mar. 12/9

6:15 am-5:25 pm

1 stop8h 10m

$380

MontrealSan Diego

YUL - SAN

YULSAN

Montreal Pierre Elliott Trudeau Intl

mié. 4/22

6:00 am-2:08 pm

1 stop11h 08m

San Diego

lun. 4/27

8:50 am-11:34 pm

1 stop11h 44m

$380

MontrealSan Diego

YUL - SAN

YULSAN

Montreal Pierre Elliott Trudeau Intl

sáb. 12/6

2:59 pm-9:18 pm

1 stop9h 19m

San Diego

dom. 12/14

10:00 pm-12:00 pm

1 stop11h 00m

$380

MontrealSan Diego

YUL - SAN

YULSAN

Montreal Pierre Elliott Trudeau Intl

mar. 1/13

12:54 pm-7:00 pm

1 stop9h 06m

San Diego

mié. 4/29

8:50 am-11:34 pm

1 stop11h 44m

$380

MontrealSan Diego

YUL - SAN

YULSAN

Montreal Pierre Elliott Trudeau Intl

mié. 12/3

12:40 pm-6:18 pm

1 stop8h 38m

San Diego

vie. 12/5

10:30 pm-1:54 pm

1 stop12h 24m

$380

MontrealSan Diego

YUL - SAN

YULSAN

Montreal Pierre Elliott Trudeau Intl

mar. 2/24

12:45 pm-8:56 pm

1 stop11h 11m

San Diego

mié. 2/25

10:30 pm-12:20 pm

1 stop10h 50m

$381

TorontoSan Diego

YYZ - SAN

YYZSAN

Toronto Pearson Intl

vie. 2/13

9:00 pm-9:52 am

1 stop15h 52m

San Diego

mié. 2/18

12:40 pm-8:30 pm

Nonstop4h 50m

$393

MontrealSan Diego

YUL - SAN

YULSAN

Montreal Pierre Elliott Trudeau Intl

mié. 4/22

2:20 pm-9:53 pm

2 stops10h 33m

San Diego

lun. 4/27

4:45 pm-10:11 am

1 stop14h 26m

$395

MontrealSan Diego

YUL - SAN

YULSAN

Montreal Pierre Elliott Trudeau Intl

mié. 12/3

9:15 am-5:35 pm

2 stops11h 20m

San Diego

vie. 12/5

9:55 pm-3:16 pm

1 stop14h 21m

$395

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/28

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 $235). 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 octubre 29, 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 November 10, 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.

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 $380, WestJet can have you in San Diego from Region of Ontario in 11h 21m. The distance from Region of Ontario to San Diego is about 2453 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 $202. However, be on the lookout for offers from Delta 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 (80%), Air Canada (76%), United Airlines (75%).

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

    On average you can expect to pay $528 for a flight from Region of Ontario to San Diego. The cheapest flight overall is $207 while the most popular route, (Toronto Pearson Intl - San Diego) is currently priced at $261.

  • 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 $235). 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
La Mesa
Poway
Lemon Grove
National City

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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 octubre 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
Porter AirlinesCheapest$115Average$277FlexibilityNo cancel feeOn-time52%
Air CanadaCheapest$216Average$512FlexibilityNo cancel feeOn-time67%
Air TransatCheapest$234Average$321FlexibilityNo cancel feeOn-time50%
United AirlinesCheapest$236Average$361FlexibilityNo cancel feeOn-time69%
DeltaCheapest$264Average$342FlexibilityNo cancel feeOn-timeN/A

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