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San Diego

$152+ 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 4/13. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — SAN
Apr 11 — Apr 181
Sat 4/11
Sat 4/18
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 March 12, 2026.

This Kiwi.com deal was found by Cheapflights users on 3/9. 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.
Mon 4/208:00 pm
YYZ
-
SAN
1 stop20h 17m
Multiple Airlines
Thu 4/237:23 pm
SAN
-
YYZ
1 stop21h 27m
Multiple Airlines
Deal found 3/9$284
This oojo deal was found by Cheapflights users on 3/12. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/306:10 am
YYZ
-
SAN
2 stops11h 00m
WestJet
Sat 6/63:30 pm
SAN
-
YYZ
1 stop11h 15m
WestJet
Deal found 3/12$286
This Trip.com deal was found by Cheapflights users on 3/9. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/15:45 pm
YUL
-
SAN
Nonstop5h 58m
Air Canada
Fri 5/87:00 am
SAN
-
YUL
Nonstop5h 31m
Air Canada
Deal found 3/9$287
This Kiwi.com deal was found by Cheapflights users on 3/12. 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.
Mon 4/138:00 pm
YYZ
-
SAN
1 stop20h 17m
Multiple Airlines
Wed 4/222:12 pm
SAN
-
YYZ
2 stops13h 01m
Multiple Airlines
Deal found 3/12$287
This oojo deal was found by Cheapflights users on 3/12. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/17:20 am
YOW
-
SAN
1 stop9h 50m
WestJet
Sat 5/93:30 pm
SAN
-
YOW
1 stop11h 05m
WestJet
Deal found 3/12$288
This Trip.com deal was found by Cheapflights users on 3/11. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/116:15 am
YYZ
-
SAN
1 stop10h 55m
WestJet
Tue 5/123:30 pm
SAN
-
YYZ
1 stop11h 15m
WestJet
Deal found 3/11$290
This American Airlines deal was found by Cheapflights users on 3/11. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/141:03 pm
YUL
-
SAN
1 stop8h 43m
American Airlines
Wed 4/154:41 pm
SAN
-
YUL
1 stop19h 03m
American Airlines
Deal found 3/11$293
This American Airlines deal was found by Cheapflights users on 3/10. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/81:15 pm
YYZ
-
SAN
1 stop10h 28m
American Airlines
Wed 4/1512:17 pm
SAN
-
YYZ
1 stop7h 38m
American Airlines
Deal found 3/10$293
This Trip.com deal was found by Cheapflights users on 3/11. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/216:15 am
YYZ
-
SAN
1 stop10h 55m
WestJet
Mon 5/253:30 pm
SAN
-
YYZ
1 stop11h 15m
WestJet
Deal found 3/11$294
This oojo deal was found by Cheapflights users on 3/11. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/226:10 am
YYZ
-
SAN
2 stops11h 00m
WestJet
Mon 5/253:30 pm
SAN
-
YYZ
1 stop11h 15m
WestJet
Deal found 3/11$297
This oojo deal was found by Cheapflights users on 3/10. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/46:15 am
YYZ
-
SAN
1 stop10h 55m
WestJet
Thu 5/73:30 pm
SAN
-
YYZ
1 stop11h 15m
WestJet
Deal found 3/10$299
This American Airlines deal was found by Cheapflights users on 3/11. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/256:27 pm
YYZ
-
SAN
1 stop8h 06m
American Airlines
Sat 5/26:15 am
SAN
-
YYZ
1 stop8h 28m
American Airlines
Deal found 3/11$300

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 March 12, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$284
(Kiwi.com)

One-way from

$152
(Trip.com)

Popular in

December

Cheapest in

April

Average price

$362

Good round-trip deal

$365 or less

Good one-way deal

$242 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. 11% potential increase in price ($52 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($10 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2026
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 March 12, 2026.
Use the filters below to find and compare flights from Ontario to San Diego that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

LondonSan Diego

YXU - SAN

YXUSAN

London

Wed 5/6

6:10 am-2:10 pm

1 stop11h 00m

San Diego

Fri 5/8

3:30 pm-5:20 am

1 stop10h 50m

$325

MontrealSan Diego

YUL - SAN

YULSAN

Montreal Pierre Elliott Trudeau Intl

Mon 4/6

12:42 pm-11:09 pm

1 stop13h 27m

San Diego

Sat 4/18

10:10 pm-11:59 am

1 stop10h 49m

$341

HamiltonSan Diego

YHM - SAN

YHMSAN

Hamilton

Wed 5/6

6:10 pm-2:10 pm

1 stop23h 00m

San Diego

Thu 5/21

3:30 pm-5:15 pm

1 stop22h 45m

$349

OttawaSan Diego

YOW - SAN

YOWSAN

Ottawa

Wed 6/3

7:20 am-2:10 pm

1 stop9h 50m

San Diego

Sat 6/6

3:30 pm-11:35 am

2 stops17h 05m

$377

MontrealSan Diego

YUL - SAN

YULSAN

Montreal Pierre Elliott Trudeau Intl

Fri 5/1

3:25 pm-11:59 pm

2 stops11h 34m

San Diego

Tue 5/5

6:32 am-10:06 pm

2 stops12h 34m

$382

MontrealSan Diego

YUL - SAN

YULSAN

Montreal Pierre Elliott Trudeau Intl

Fri 6/26

12:45 pm-10:58 pm

1 stop13h 13m

San Diego

Sat 7/4

12:50 pm-11:56 pm

1 stop8h 06m

$382

MontrealSan Diego

YUL - SAN

YULSAN

Montreal Pierre Elliott Trudeau Intl

Thu 7/23

6:00 am-2:08 pm

1 stop11h 08m

San Diego

Thu 7/30

8:00 am-11:56 pm

1 stop12h 56m

$382

TorontoSan Diego

YYZ - SAN

YYZSAN

Toronto Pearson Intl

Fri 6/12

2:15 pm-9:44 pm

1 stop10h 29m

San Diego

Thu 6/25

10:40 pm-12:16 pm

1 stop10h 36m

$382

TorontoSan Diego

YYZ - SAN

YYZSAN

Toronto Pearson Intl

Tue 6/2

4:18 pm-11:54 pm

2 stops10h 36m

San Diego

Mon 6/8

9:45 pm-10:04 am

1 stop9h 19m

$383

TorontoSan Diego

YYZ - SAN

YYZSAN

Toronto Pearson Intl

Tue 4/21

6:10 am-10:44 am

1 stop7h 34m

San Diego

Wed 4/22

10:30 pm-12:19 pm

1 stop10h 49m

$383

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/12

Showing 1-10 of 60 resultsSorted by cheapest first
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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 March 12, 2026.

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 March 12, 2026.

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 $325, WestJet can have you in San Diego from Region of Ontario in 11h. The distance from Region of Ontario to San Diego is about 2070 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 Air Canada, with whom users have recently found tickets for as low as $145. However, be on the lookout for offers from Porter 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 cheapest flights from Region of Ontario to San Diego?

    On average you can expect to pay $533 for a flight from Region of Ontario to San Diego. The cheapest flight overall is $241 while the most popular route, (Toronto Pearson Intl - San Diego) is currently priced at $278.

  • 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
National City
Coronado
La Mesa
Poway
Julian
Lemon Grove

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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 March 12, 2026.
AirlineCheapestAverageFlexibilityOn-time
Porter AirlinesCheapest$130Average$289FlexibilityNo cancel feeOn-time52%
Air CanadaCheapest$225Average$670FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$261Average$452FlexibilityNo cancel feeOn-time69%
DeltaCheapest$267Average$397FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$270Average$422FlexibilityNo cancel feeOn-time71%

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