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Cheap flights from Ontario to San Diego from C$ 228

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 14/12. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — SAN
28 Nov — 5 Dec1
1 adult
1 adult, Economy, 0 bags

Find flight deals from Ontario to San Diego

Enter your travel dates to find the best prices.

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 29 October 2025.

Fri 21/117:55 p.m.YYZ - SAN
1 stop22h 32mMultiple Airlines
Mon 8/121:33 p.m.SAN - YYZ
1 stop13h 47mMultiple Airlines
Deal found 29/10C$ 429
Tue 18/1111:32 a.m.YYZ - SAN
1 stop12h 16mAmerican Airlines
Sat 6/126:15 a.m.SAN - YYZ
1 stop12h 14mAmerican Airlines
Deal found 27/10C$ 435
Thu 20/117:55 p.m.YYZ - SAN
1 stop22h 12mMultiple Airlines
Thu 27/118:39 a.m.SAN - YYZ
2 stops19h 19mMultiple Airlines
Deal found 28/10C$ 436
Mon 1/127:55 p.m.YYZ - SAN
1 stop27h 23mMultiple Airlines
Thu 4/123:47 p.m.SAN - YYZ
1 stop11h 33mMultiple Airlines
Deal found 28/10C$ 437
Thu 20/111:30 p.m.YYZ - SAN
2 stops28h 37mMultiple Airlines
Mon 8/121:33 p.m.SAN - YYZ
1 stop13h 47mMultiple Airlines
Deal found 29/10C$ 440
Thu 20/111:30 p.m.YYZ - SAN
2 stops28h 37mMultiple Airlines
Thu 11/123:47 p.m.SAN - YYZ
1 stop11h 33mMultiple Airlines
Deal found 29/10C$ 442
Fri 21/117:55 p.m.YYZ - SAN
1 stop22h 32mMultiple Airlines
Fri 12/121:33 p.m.SAN - YYZ
1 stop13h 47mMultiple Airlines
Deal found 29/10C$ 444
Tue 18/1112:40 p.m.YYZ - SAN
1 stop23h 00mMultiple Airlines
Thu 11/123:47 p.m.SAN - YYZ
1 stop25h 45mMultiple Airlines
Deal found 27/10C$ 449
Fri 12/129:35 a.m.YYZ - SAN
1 stop9h 45mMultiple Airlines
Fri 19/127:21 p.m.SAN - YYZ
1 stop7h 59mMultiple Airlines
Deal found 28/10C$ 450
Tue 18/1111:32 a.m.YYZ - SAN
1 stop12h 16mAmerican Airlines
Thu 11/126:15 a.m.SAN - YYZ
1 stop12h 14mAmerican Airlines
Deal found 28/10C$ 453
Thu 4/129:45 a.m.YYZ - SAN
2 stops17h 14mMultiple Airlines
Thu 18/121:06 p.m.SAN - YYZ
1 stop14h 41mMultiple Airlines
Deal found 27/10C$ 454
Tue 18/1112:40 p.m.YYZ - SAN
1 stop23h 00mMultiple Airlines
Fri 12/121:33 p.m.SAN - YYZ
1 stop13h 47mMultiple Airlines
Deal found 27/10C$ 456

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 29 October 2025.

Round-trip from

C$ 429

One-way from

C$ 228

Popular in

December

Cheapest in

April

Average price

C$ 538

Good round-trip deal

C$ 536 or less

Good one-way deal

C$ 302 or less
21/11-8/12
  • 21/11-8/12
  • 2 total stops
  • 36h 19m total
  • Ontario to San Diego
Search Deals
14/12
  • 14/12
  • 1 total stop
  • 19h 38m total
  • Ontario to San Diego
Search Deals
Highest demand for flights based on searches. 9% potential increase in price (C$ 70 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 18 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 629,999 searches. Data last updated 29 October 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

Thu 22/1

6:10 p.m.-11:45 a.m.

1 stop20h 35m

San Diego

Wed 28/1

12:35 p.m.-5:17 p.m.

1 stop25h 42m

C$ 497

MontrealSan Diego

YUL - SAN

YULSAN

Montreal Pierre Elliott Trudeau Intl

Fri 5/12

7:00 a.m.-3:21 p.m.

1 stop11h 21m

San Diego

Tue 9/12

6:15 a.m.-5:25 p.m.

1 stop8h 10m

C$ 531

MontrealSan Diego

YUL - SAN

YULSAN

Montreal Pierre Elliott Trudeau Intl

Tue 24/2

12:45 p.m.-10:00 p.m.

1 stop12h 15m

San Diego

Wed 25/2

10:30 p.m.-12:20 p.m.

1 stop10h 50m

C$ 531

MontrealSan Diego

YUL - SAN

YULSAN

Montreal Pierre Elliott Trudeau Intl

Sat 6/12

2:59 p.m.-9:18 p.m.

1 stop9h 19m

San Diego

Sun 14/12

10:00 p.m.-12:00 p.m.

1 stop11h 00m

C$ 531

MontrealSan Diego

YUL - SAN

YULSAN

Montreal Pierre Elliott Trudeau Intl

Wed 22/4

12:45 p.m.-9:44 p.m.

1 stop11h 59m

San Diego

Mon 27/4

10:30 p.m.-12:16 p.m.

1 stop10h 46m

C$ 531

MontrealSan Diego

YUL - SAN

YULSAN

Montreal Pierre Elliott Trudeau Intl

Tue 13/1

12:54 p.m.-7:00 p.m.

1 stop9h 06m

San Diego

Wed 29/4

8:50 a.m.-11:34 p.m.

1 stop11h 44m

C$ 531

MontrealSan Diego

YUL - SAN

YULSAN

Montreal Pierre Elliott Trudeau Intl

Tue 2/12

12:50 p.m.-10:24 p.m.

1 stop12h 34m

San Diego

Fri 5/12

10:00 p.m.-12:00 p.m.

1 stop11h 00m

C$ 531

MontrealSan Diego

YUL - SAN

YULSAN

Montreal Pierre Elliott Trudeau Intl

Wed 3/12

12:40 p.m.-6:18 p.m.

1 stop8h 38m

San Diego

Fri 5/12

10:30 p.m.-1:54 p.m.

1 stop12h 24m

C$ 531

TorontoSan Diego

YYZ - SAN

YYZSAN

Toronto Pearson Intl

Wed 21/1

4:45 p.m.-4:24 p.m.

2 stops26h 39m

San Diego

Wed 28/1

3:10 p.m.-3:35 p.m.

2 stops21h 25m

C$ 549

MontrealSan Diego

YUL - SAN

YULSAN

Montreal Pierre Elliott Trudeau Intl

Wed 22/4

2:20 p.m.-9:53 p.m.

2 stops10h 33m

San Diego

Mon 27/4

4:45 p.m.-10:11 a.m.

1 stop14h 26m

C$ 552

Flights are sorted by cheapest round-trip flights first.

Deals found on 28/10

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 C$ 134). Flying from Region of Ontario to San Diego in November is currently the most expensive (average of C$ 328). 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 29 October 2025.

When flying from Region of Ontario to San Diego, the time of day you fly usually plays a role in the price. Save by searching for a flight at noon, which can drop the price by up to 19% versus a flight in the afternoon.

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 16 December 2024.

Travelers seeking maximum savings on their Region of Ontario to San Diego flight should consider departing on Sunday evenings when fares are most often at their lowest. Wednesday evenings 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?

    San Diego (SAN), located 4.2 km from the city centre, is the airport you fly into when you book flights from Ontario to San Diego.

  • How long is the flight from Region of Ontario to San Diego?

    Departing from Region of Ontario to San Diego will take you 11h 21m. The distance between Region of Ontario and San Diego is about 3948 km. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

  • What are the cheapest airlines to fly from Region of Ontario to San Diego one-way?

    To fly one-way, consider booking your trip with WestJet, which is currently one of the cheapest options available, starting at C$ 282. Delta flights start at C$ 307 while deals on American Airlines start at C$ 307 one-way.

  • What are the most popular routes from Region of Ontario to San Diego?

    Most travellers choose Toronto Pearson Intl - San Diego, Montreal Pierre Elliott Trudeau Intl - San Diego or Toronto Island - San Diego when deciding on the best route from Region of Ontario to San Diego.

  • What are the most reliable airlines from Region of Ontario to San Diego?

    The top 3 most reliable airlines when flying from Region of Ontario to San Diego are Air Canada Rouge (80%), Air Canada (76%) and United Airlines (75%).

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

    While on average a flight from Region of Ontario to San Diego is generally C$ 529, our data shows the cheapest flight currently is C$ 300. When looking at the most popular route, (Toronto Pearson Intl - San Diego), you can expect to pay C$ 365 for that flight.

  • 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 C$ 134). Flying from Region of Ontario to San Diego in November is currently the most expensive (average of C$ 328). 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

Travelling to a place near San Diego?

Book flights to San Diego if you plan to visit one of these locations
La Mesa
Borrego Springs
El Cajon

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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 8 airlines flying from Ontario to San Diego

Discover the top 8 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 629,999 searches. Data last updated 29 October 2025.
AirlineCheapestAverageFlexibilityOn-time
Air TransatCheapestC$ 241AverageC$ 409FlexibilityNo cancel feeOn-time50%
Search Air Transat flights
Porter AirlinesCheapestC$ 247AverageC$ 442FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
American AirlinesCheapestC$ 297AverageC$ 557FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
United AirlinesCheapestC$ 314AverageC$ 483FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Air CanadaCheapestC$ 323AverageC$ 555FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
DeltaCheapestC$ 327AverageC$ 442FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
WestJetCheapestC$ 336AverageC$ 442FlexibilityNo cancel feeOn-time60%
Search WestJet flights
Alaska AirlinesCheapestC$ 387AverageC$ 858FlexibilityNo cancel feeOn-time75%
Search Alaska Airlines flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Ontario to San Diego?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Ontario to San Diego. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

Why should you use Cheapflights to find cheap flight tickets from Ontario to San Diego?

Cheapflights simply makes it quick and affordable to book flights from Ontario to San Diego by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

Can Cheapflights find flights from Ontario to San Diego with no change fees?

Yes! Cheapflights helps users easily find flights from Ontario to San Diego with no change fees.

Can Cheapflights notify me if prices for flights from Ontario to San Diego become cheaper?

Not ready to book yet? You can track prices for flights from Ontario to San Diego on Cheapflights with our Price Alert feature and get notified when better prices are available.

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