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Cheap flights from Ontario to San Diego from C$ 268

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 12/12. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — SAN
23 Aug — 30 Aug1
1 adult
1 adult, Economy, 0 bags

Cheap 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 24 July 2026.

Sat 5/97:15 a.m.
YUL
-
SAN
1 stop9h 55m
WestJet
Fri 11/93:30 p.m.
SAN
-
YUL
1 stop12h 35m
WestJet
Deal found 19/7C$ 468
Sat 5/95:45 p.m.
YUL
-
SAN
Nonstop5h 54m
Air Canada
Sat 12/91:10 p.m.
SAN
-
YUL
1 stop9h 41m
Air Canada
Deal found 20/7C$ 476
Tue 15/96:10 a.m.
YXU
-
SAN
1 stop11h 00m
WestJet
Sat 19/93:30 p.m.
SAN
-
YXU
1 stop10h 50m
WestJet
Deal found 23/7C$ 480
Tue 15/95:45 p.m.
YUL
-
SAN
Nonstop5h 51m
Air Canada
Mon 21/97:00 a.m.
SAN
-
YUL
Nonstop5h 27m
Air Canada
Deal found 23/7C$ 482
Sun 6/96:00 a.m.
YUL
-
SAN
1 stop8h 35m
Air Canada
Sun 13/97:00 a.m.
SAN
-
YUL
Nonstop5h 27m
Air Canada
Deal found 23/7C$ 493
Sat 19/95:40 a.m.
YXU
-
SAN
1 stop9h 36m
Air Canada
Mon 21/97:00 a.m.
SAN
-
YXU
2 stops11h 40m
Air Canada
Deal found 19/7C$ 503
Thu 10/126:00 a.m.
YUL
-
SAN
1 stop11h 11m
Delta
Tue 15/1210:30 p.m.
SAN
-
YUL
1 stop10h 45m
Delta
Deal found 23/7C$ 508
Mon 9/1112:45 p.m.
YUL
-
SAN
1 stop12h 07m
Delta
Mon 16/1110:30 p.m.
SAN
-
YUL
1 stop10h 45m
Delta
Deal found 19/7C$ 511
Tue 6/105:45 p.m.
YUL
-
SAN
Nonstop5h 51m
Air Canada
Wed 7/107:00 a.m.
SAN
-
YUL
Nonstop5h 27m
Air Canada
Deal found 22/7C$ 517
Tue 6/106:35 p.m.
YUL
-
SAN
1 stop18h 42m
United Airlines
Wed 7/101:24 p.m.
SAN
-
YUL
1 stop15h 52m
United Airlines
Deal found 23/7C$ 518
Thu 27/86:00 a.m.
YYZ
-
SAN
2 stops20h 44m
Multiple Airlines
Mon 7/98:59 p.m.
SAN
-
YYZ
1 stop17h 10m
Multiple Airlines
Deal found 22/7C$ 521
Fri 28/83:50 p.m.
YYZ
-
SAN
2 stops26h 00m
Multiple Airlines
Wed 9/93:30 p.m.
SAN
-
YYZ
1 stop11h 15m
Multiple Airlines
Deal found 23/7C$ 523

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 24 July 2026.

Round-trip from

C$ 476

One-way from

C$ 268

Popular in

March

Cheapest in

April

Average price

C$ 721

Good round-trip deal

C$ 696 or less

Good one-way deal

C$ 418 or less
Air Canada
  • Air Canada
  • 5/9-12/9
  • 1 total stop
  • 15h 35m total
  • Ontario to San Diego
Search Deals
Air Canada
  • Air Canada
  • 12/12
  • 1 total stop
  • 9h 00m total
  • Ontario to San Diego
Search Deals
Highest demand for flights based on searches. 2% potential increase in price (C$ 22 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 22 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 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 629,999 searches. Data last updated 24 July 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

Sat 19/9

10:05 a.m.-8:36 p.m.

2 stops13h 31m

San Diego

Mon 21/9

7:00 a.m.-9:40 p.m.

2 stops11h 40m

C$ 514

MontrealSan Diego

YUL - SAN

YULSAN

Montreal Pierre Elliott Trudeau Intl

Tue 6/10

6:35 p.m.-10:17 a.m.

1 stop18h 42m

San Diego

Wed 7/10

1:24 p.m.-8:16 a.m.

1 stop15h 52m

C$ 518

TorontoSan Diego

YKF - SAN

YKFSAN

Toronto Region of Waterloo Intl

Tue 8/9

8:40 p.m.-2:10 p.m.

1 stop20h 30m

San Diego

Mon 14/9

3:30 p.m.-7:50 p.m.

1 stop25h 20m

C$ 551

LondonSan Diego

YXU - SAN

YXUSAN

London

Tue 15/9

6:10 a.m.-2:10 p.m.

1 stop11h 00m

San Diego

Sat 19/9

3:30 p.m.-5:20 a.m.

1 stop10h 50m

C$ 568

LondonSan Diego

YXU - SAN

YXUSAN

London

Tue 15/9

5:40 a.m.-12:16 p.m.

1 stop9h 36m

San Diego

Sat 19/9

7:00 a.m.-9:40 p.m.

2 stops11h 40m

C$ 575

HamiltonSan Diego

YHM - SAN

YHMSAN

Hamilton

Wed 2/9

6:10 p.m.-2:10 p.m.

1 stop23h 00m

San Diego

Wed 9/9

3:30 p.m.-5:15 p.m.

1 stop22h 45m

C$ 576

TorontoSan Diego

YKF - SAN

YKFSAN

Toronto Region of Waterloo Intl

Tue 25/8

8:40 p.m.-2:10 p.m.

1 stop20h 30m

San Diego

Thu 15/10

3:30 p.m.-7:50 p.m.

1 stop25h 20m

C$ 579

OttawaSan Diego

YOW - SAN

YOWSAN

Ottawa

Thu 20/8

6:25 a.m.-9:25 p.m.

2 stops18h 00m

San Diego

Thu 27/8

8:00 a.m.-11:54 p.m.

2 stops12h 54m

C$ 582

HamiltonSan Diego

YHM - SAN

YHMSAN

Hamilton

Mon 7/9

6:10 p.m.-2:10 p.m.

1 stop23h 00m

San Diego

Mon 14/9

3:30 p.m.-5:15 p.m.

1 stop22h 45m

C$ 583

HamiltonSan Diego

YHM - SAN

YHMSAN

Hamilton

Tue 15/9

6:10 p.m.-2:10 p.m.

1 stop23h 00m

San Diego

Tue 22/9

3:30 p.m.-5:15 p.m.

1 stop22h 45m

C$ 590

Flights are sorted by cheapest round-trip flights first.

Deals found on 19/7

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, May is the cheapest month in which you can book a flight from Region of Ontario to San Diego (average of C$ 596). Flying from Region of Ontario to San Diego in March is currently the most expensive (average of C$ 744). 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 24 July 2026.

When flying from Region of Ontario to San Diego, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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

Airfare is below average for this route at the moment.
Region of Ontario to San Diego flights typically cost between C$ 611 and C$ 896 in August.
The cheapest round-trip price found within the last 5 days was C$ 521 on Multiple Airlines (27 Aug-7 Sep).

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

To ensure you get the cheapest price possible for a flight from Region of Ontario to San Diego, you should look to book at least 86 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

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 13h 31m. The distance between Region of Ontario and San Diego is about 3331 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 United Airlines, which is currently one of the cheapest options available, starting at C$ 238. Delta flights start at C$ 240 while deals on Air Canada start at C$ 248 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 (84%), United Airlines (82%) and Air Canada (82%).

  • 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$ 694, our data shows the cheapest flight currently is C$ 364. When looking at the most popular route, (Toronto Pearson Intl - San Diego), you can expect to pay C$ 499 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, May is the cheapest month in which you can book a flight from Region of Ontario to San Diego (average of C$ 596). Flying from Region of Ontario to San Diego in March is currently the most expensive (average of C$ 744). 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
El Cajon
La Mesa
Borrego Springs

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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 629,999 searches. Data last updated 24 July 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapestC$ 313AverageC$ 555FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Air CanadaCheapestC$ 379AverageC$ 736FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapestC$ 391AverageC$ 579FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
WestJetCheapestC$ 397AverageC$ 534FlexibilityNo cancel feeOn-time60%
Search WestJet flights
American AirlinesCheapestC$ 403AverageC$ 616FlexibilityNo cancel feeOn-time71%
Search American 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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