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San Diego

$160+ 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 5/19. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — SAN
May 29 — Jun 51
Fri 5/29
Fri 6/5
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 April 29, 2026.

This WestJet deal was found by Cheapflights users on 4/28. 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 WestJet is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/116:15 am
YYZ
-
SAN
1 stop10h 55m
WestJet
Thu 9/243:30 pm
SAN
-
YYZ
1 stop11h 15m
WestJet
Deal found 4/28$293
This Air Canada deal was found by Cheapflights users on 4/28. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/69:20 am
YYZ
-
SAN
Nonstop5h 15m
Air Canada
Tue 9/221:10 pm
SAN
-
YYZ
Nonstop5h 00m
Air Canada
Deal found 4/28$294
This Justfly.com deal was found by Cheapflights users on 4/28. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/106:10 am
YYZ
-
SAN
2 stops11h 00m
WestJet
Thu 9/173:30 pm
SAN
-
YYZ
2 stops18h 15m
WestJet
Deal found 4/28$296
This Air Canada deal was found by Cheapflights users on 4/28. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/69:20 am
YYZ
-
SAN
Nonstop5h 15m
Air Canada
Mon 9/217:00 am
SAN
-
YYZ
1 stop9h 53m
Air Canada
Deal found 4/28$297
This FlightHub deal was found by Cheapflights users on 4/28. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/810:20 pm
YYZ
-
SAN
2 stops18h 50m
WestJet
Tue 9/223:30 pm
SAN
-
YYZ
1 stop11h 15m
WestJet
Deal found 4/28$298
This Delta deal was found by Cheapflights users on 4/27. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/85:50 pm
YYZ
-
SAN
1 stop7h 52m
Delta
Thu 9/179:40 pm
SAN
-
YYZ
1 stop9h 42m
Delta
Deal found 4/27$299
This Delta deal was found by Cheapflights users on 4/28. 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.
Mon 9/76:15 am
YYZ
-
SAN
1 stop9h 30m
Delta
Sat 9/1910:30 pm
SAN
-
YYZ
1 stop7h 25m
Delta
Deal found 4/28$300
This Air Canada deal was found by Cheapflights users on 4/27. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/215:45 pm
YUL
-
SAN
Nonstop5h 51m
Air Canada
Mon 9/287:00 am
SAN
-
YUL
Nonstop5h 27m
Air Canada
Deal found 4/27$301
This Air Canada deal was found by Cheapflights users on 4/28. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/275:45 pm
YUL
-
SAN
Nonstop5h 51m
Air Canada
Sat 10/37:00 am
SAN
-
YUL
Nonstop5h 27m
Air Canada
Deal found 4/28$304
This FlightHub deal was found by Cheapflights users on 4/28. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/96:10 am
YYZ
-
SAN
2 stops11h 00m
WestJet
Tue 9/223:30 pm
SAN
-
YYZ
2 stops16h 45m
WestJet
Deal found 4/28$304
This American Airlines deal was found by Cheapflights users on 4/27. 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.
Sat 9/126:46 am
YYZ
-
SAN
1 stop11h 54m
American Airlines
Sat 9/129:55 pm
SAN
-
YYZ
1 stop9h 25m
American Airlines
Deal found 4/27$308
This Justfly.com deal was found by Cheapflights users on 4/24. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/56:10 am
YYZ
-
SAN
2 stops11h 00m
WestJet
Fri 10/163:30 pm
SAN
-
YYZ
2 stops18h 15m
WestJet
Deal found 4/24$310

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 April 29, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$294
(WestJet)

One-way from

$160
(Trip.com)

Popular in

March

Cheapest in

April

Average price

$368

Good round-trip deal

$392 or less

Good one-way deal

$249 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. 6% potential increase in price ($29 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($12 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 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 April 29, 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

TorontoSan Diego

YYZ - SAN

YYZSAN

Toronto Pearson Intl

Tue 9/8

6:00 am-2:08 pm

1 stop11h 08m

San Diego

Sun 9/20

9:40 pm-12:15 pm

1 stop11h 35m

$299

LondonSan Diego

YXU - SAN

YXUSAN

London

Tue 5/12

6:10 am-2:10 pm

1 stop11h 00m

San Diego

Wed 5/13

3:30 pm-5:20 am

1 stop10h 50m

$348

TorontoSan Diego

YYZ - SAN

YYZSAN

Toronto Pearson Intl

Sun 10/25

2:15 pm-9:52 pm

1 stop10h 37m

San Diego

Sat 11/7

6:15 am-4:39 pm

1 stop7h 24m

$370
Quickest round-trip

TorontoSan Diego

YYZ - SAN

YYZSAN

Toronto Pearson Intl

Wed 10/14

3:59 pm-9:52 pm

1 stop8h 53m

San Diego

Thu 11/19

10:30 pm-9:01 am

1 stop7h 31m

$370

LondonSan Diego

YXU - SAN

YXUSAN

London

Sat 10/17

5:40 am-12:46 pm

2 stops10h 06m

San Diego

Tue 10/20

7:41 pm-2:55 pm

3 stops16h 14m

$382

LondonSan Diego

YXU - SAN

YXUSAN

London

Sat 10/17

5:40 am-12:46 pm

2 stops10h 06m

San Diego

Tue 10/20

7:00 am-9:40 pm

2 stops11h 40m

$382

TorontoSan Diego

YKF - SAN

YKFSAN

Toronto Region of Waterloo Intl

Fri 6/12

8:40 pm-2:10 pm

1 stop20h 30m

San Diego

Sun 6/14

8:29 pm-7:50 pm

2 stops20h 21m

$384

MontrealSan Diego

YUL - SAN

YULSAN

Montreal Pierre Elliott Trudeau Intl

Wed 5/20

6:00 am-2:20 pm

1 stop11h 20m

San Diego

Tue 5/26

8:00 am-11:57 pm

1 stop12h 57m

$388

MontrealSan Diego

YUL - SAN

YULSAN

Montreal Pierre Elliott Trudeau Intl

Thu 7/9

7:00 am-5:00 pm

1 stop13h 00m

San Diego

Tue 7/21

8:00 am-11:52 pm

1 stop12h 52m

$389

MontrealSan Diego

YUL - SAN

YULSAN

Montreal Pierre Elliott Trudeau Intl

Wed 5/27

6:00 am-2:20 pm

1 stop11h 20m

San Diego

Wed 6/3

12:41 pm-11:57 pm

1 stop8h 16m

$390

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/26

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

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

Booking 22 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.

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 April 29, 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.

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 $299, Delta can have you in San Diego from Region of Ontario in 9h 41m. 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 Porter Airlines, with whom users have recently found tickets for as low as $152. 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 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 $426 for a flight from Region of Ontario to San Diego. The cheapest flight overall is $193 while the most popular route, (Toronto Pearson Intl - San Diego) is currently priced at $293.

  • 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
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 April 29, 2026.
AirlineCheapestAverageFlexibilityOn-time
Porter AirlinesCheapest$130Average$332FlexibilityNo cancel feeOn-time52%
Air CanadaCheapest$246Average$581FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$275Average$487FlexibilityNo cancel feeOn-time69%
DeltaCheapest$275Average$399FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$323Average$437FlexibilityNo cancel feeOn-time71%

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