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San Diego

$201+ 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 9/26. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — SAN
Jul 11 — Jul 181
Sat 7/11
Sat 7/18
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 June 11, 2026.

This CheapOair deal was found by Cheapflights users on 6/8. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/27:00 am
YYZ
-
SAN
1 stop10h 10m
WestJet
Mon 10/53:30 pm
SAN
-
YYZ
1 stop11h 15m
WestJet
Deal found 6/8$365
This Mytrip deal was found by Cheapflights users on 6/7. 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.
Sat 9/268:00 am
YYZ
-
SAN
1 stop9h 10m
WestJet
Mon 9/283:30 pm
SAN
-
YYZ
1 stop11h 15m
WestJet
Deal found 6/7$373
This oojo deal was found by Cheapflights users on 6/10. 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 8/37:20 am
YOW
-
SAN
1 stop9h 50m
WestJet
Fri 8/73:30 pm
SAN
-
YOW
1 stop11h 05m
WestJet
Deal found 6/10$376
This Air Canada deal was found by Cheapflights users on 6/9. 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.
Wed 7/299:20 am
YYZ
-
SAN
Nonstop5h 15m
Air Canada
Wed 8/512:30 pm
SAN
-
YYZ
Nonstop4h 57m
Air Canada
Deal found 6/9$379
This Air Canada deal was found by Cheapflights users on 6/9. 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.
Thu 8/273:00 pm
YYZ
-
SAN
1 stop8h 39m
Air Canada
Mon 8/3112:30 pm
SAN
-
YYZ
Nonstop4h 57m
Air Canada
Deal found 6/9$382
This oojo deal was found by Cheapflights users on 6/10. 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.
Tue 8/256:15 pm
YOW
-
SAN
2 stops22h 55m
WestJet
Fri 9/43:30 pm
SAN
-
YOW
1 stop11h 05m
WestJet
Deal found 6/10$387
This oojo deal was found by Cheapflights users on 6/9. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/97:00 am
YYZ
-
SAN
1 stop10h 10m
WestJet
Wed 9/233:30 pm
SAN
-
YYZ
1 stop11h 15m
WestJet
Deal found 6/9$387
This Kiwi.com deal was found by Cheapflights users on 6/9. 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 7/2110:50 am
YYZ
-
SAN
2 stops30h 18m
Multiple Airlines
Tue 7/283:03 pm
SAN
-
YYZ
1 stop12h 36m
Multiple Airlines
Deal found 6/9$390
This oojo deal was found by Cheapflights users on 6/10. 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.
Wed 9/236:10 am
YYZ
-
SAN
2 stops11h 00m
WestJet
Tue 9/293:30 pm
SAN
-
YYZ
1 stop11h 15m
WestJet
Deal found 6/10$394
This CheapOair deal was found by Cheapflights users on 6/8. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/27:00 am
YYZ
-
SAN
1 stop10h 10m
WestJet
Mon 9/143:30 pm
SAN
-
YYZ
1 stop11h 15m
WestJet
Deal found 6/8$395
This FlightHub deal was found by Cheapflights users on 6/9. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/287:15 am
YUL
-
SAN
1 stop9h 55m
WestJet
Sat 8/13:30 pm
SAN
-
YUL
1 stop12h 35m
WestJet
Deal found 6/9$401
This oojo deal was found by Cheapflights users on 6/10. 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.
Thu 7/164:15 pm
YOW
-
SAN
1 stop24h 55m
WestJet
Tue 7/213:30 pm
SAN
-
YOW
1 stop11h 05m
WestJet
Deal found 6/10$403

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 June 11, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$365
(CheapOair)

One-way from

$201
(Booking.com)

Popular in

March

Cheapest in

April

Average price

$497

Good round-trip deal

$417 or less

Good one-way deal

$317 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. 2% potential increase in price ($11 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 June 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 June 11, 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
Quickest round-trip

MontrealSan Diego

YUL - SAN

YULSAN

Montreal Pierre Elliott Trudeau Intl

Sat 9/5

5:45 pm-8:39 pm

Nonstop5h 54m

San Diego

Tue 9/8

6:15 am-4:35 pm

1 stop7h 20m

$405

MontrealSan Diego

YUL - SAN

YULSAN

Montreal Pierre Elliott Trudeau Intl

Thu 7/16

7:00 am-5:00 pm

1 stop13h 00m

San Diego

Wed 7/22

8:00 am-11:52 pm

1 stop12h 52m

$406

TorontoSan Diego

YYZ - SAN

YYZSAN

Toronto Pearson Intl

Mon 7/20

1:38 pm-10:57 pm

1 stop12h 19m

San Diego

Fri 7/31

11:48 am-11:13 pm

1 stop8h 25m

$406

TorontoSan Diego

YYZ - SAN

YYZSAN

Toronto Pearson Intl

Mon 11/23

12:14 pm-9:41 pm

1 stop12h 27m

San Diego

Sun 12/6

8:00 am-9:58 pm

1 stop10h 58m

$406

MontrealSan Diego

YUL - SAN

YULSAN

Montreal Pierre Elliott Trudeau Intl

Tue 11/3

12:45 pm-9:52 pm

1 stop12h 07m

San Diego

Mon 11/9

10:40 pm-11:44 am

1 stop10h 04m

$407

MontrealSan Diego

YUL - SAN

YULSAN

Montreal Pierre Elliott Trudeau Intl

Fri 10/30

12:45 pm-11:03 pm

1 stop13h 18m

San Diego

Thu 11/5

11:40 am-11:37 pm

1 stop8h 57m

$407

TorontoSan Diego

YYZ - SAN

YYZSAN

Toronto Pearson Intl

Sun 10/4

2:24 pm-6:36 pm

1 stop7h 12m

San Diego

Tue 10/27

11:40 am-11:00 pm

1 stop8h 20m

$407

TorontoSan Diego

YYZ - SAN

YYZSAN

Toronto Pearson Intl

Wed 11/11

5:10 pm-11:55 pm

1 stop9h 45m

San Diego

Sun 11/15

6:15 am-5:22 pm

1 stop8h 07m

$407

LondonSan Diego

YXU - SAN

YXUSAN

London

Fri 9/4

6:10 am-2:10 pm

1 stop11h 00m

San Diego

Wed 9/9

3:30 pm-5:20 am

1 stop10h 50m

$408

OttawaSan Diego

YOW - SAN

YOWSAN

Ottawa

Tue 9/8

7:20 am-2:10 pm

1 stop9h 50m

San Diego

Tue 9/15

3:30 pm-5:35 am

1 stop11h 05m

$409

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/9

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, February is the cheapest month in which you can book a flight from Region of Ontario to San Diego (average of $108). Flying from Region of Ontario to San Diego in January is currently the most expensive (average of $244). 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 June 11, 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 June 11, 2026.

The most flights from CAON to SAN are scheduled on a Monday (2 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (1 on average).

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

How far ahead should I book a flight from Region of Ontario to San Diego?

Booking 81 days in advance of your planned departure date is, on average, the best time to get cheap flights from Region of Ontario to San Diego. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

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 $405, United Airlines can have you in San Diego from Region of Ontario in 5h 54m. 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 Porter Airlines, with whom users have recently found tickets for as low as $149. However, be on the lookout for offers from Air Canada 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 Toronto Island - San Diego or Montreal Pierre Elliott Trudeau Intl - 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 (79%), Air Canada (78%), United Airlines (77%).

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

    On average you can expect to pay $536 for a flight from Region of Ontario to San Diego. The cheapest flight overall is $240 while the most popular route, (Toronto Pearson Intl - San Diego) is currently priced at $391.

  • 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, February is the cheapest month in which you can book a flight from Region of Ontario to San Diego (average of $108). Flying from Region of Ontario to San Diego in January is currently the most expensive (average of $244). 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
National City
Chula Vista
Poway
Coronado
La Mesa
Santee
Julian
Lemon Grove

Browse thousands of different options on Cheapflights for your next trip

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Top 4 airlines flying from Ontario to San Diego

Discover the top 4 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 June 11, 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$252Average$550FlexibilityNo cancel feeOn-time67%
DeltaCheapest$275Average$407FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$293Average$487FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$323Average$437FlexibilityNo cancel feeOn-time71%

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