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Cheap flights from San Diego to Ontario from C$ 180

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 11/12. Fares are subject to change and may not be available on all flights or dates of travel.
SAN — YYZ
27 Nov — 4 Dec1
1 adult
1 adult, Economy, 0 bags

Find flight deals from San Diego to Ontario

Enter your travel dates to find the best prices.

Cheapest flights from San Diego to Ontario
Explore the most affordable flight options available from San Diego to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 28 October 2025.

Sat 13/126:15 a.m.SAN - YYZ
1 stop12h 14mAmerican Airlines
Sat 10/111:30 a.m.YYZ - SAN
1 stop13h 56mAmerican Airlines
Deal found 27/10C$ 478
Mon 15/121:33 p.m.SAN - YYZ
1 stop13h 47mMultiple Airlines
Wed 31/127:10 a.m.YYZ - SAN
2 stops29h 47mMultiple Airlines
Deal found 27/10C$ 480
Tue 2/126:20 a.m.SAN - YYZ
1 stop12h 09mAmerican Airlines
Fri 5/126:00 a.m.YYZ - SAN
1 stop11h 16mAmerican Airlines
Deal found 27/10C$ 481
Mon 17/116:19 a.m.SAN - YYZ
1 stop12h 10mAmerican Airlines
Tue 18/1111:32 a.m.YYZ - SAN
1 stop12h 16mAmerican Airlines
Deal found 27/10C$ 484
Sat 22/116:52 p.m.SAN - YYZ
1 stop8h 28mMultiple Airlines
Thu 27/117:55 p.m.YYZ - SAN
1 stop15h 45mMultiple Airlines
Deal found 28/10C$ 490
Sun 21/121:06 p.m.SAN - YYZ
1 stop14h 14mMultiple Airlines
Sun 4/17:55 p.m.YYZ - SAN
1 stop19h 43mMultiple Airlines
Deal found 26/10C$ 491
Sat 22/116:52 p.m.SAN - YYZ
1 stop8h 28mMultiple Airlines
Wed 26/119:40 a.m.YYZ - SAN
2 stops25h 14mMultiple Airlines
Deal found 27/10C$ 502
Fri 12/121:33 p.m.SAN - YYZ
1 stop13h 47mMultiple Airlines
Fri 19/129:35 a.m.YYZ - SAN
1 stop30h 03mMultiple Airlines
Deal found 28/10C$ 504
Mon 22/127:21 p.m.SAN - YYZ
1 stop7h 59mMultiple Airlines
Tue 6/19:35 a.m.YYZ - SAN
1 stop30h 03mMultiple Airlines
Deal found 27/10C$ 506
Thu 11/126:15 a.m.SAN - YUL
2 stops31h 12mMultiple Airlines
Sat 13/126:00 p.m.YUL - SAN
1 stop20h 45mMultiple Airlines
Deal found 28/10C$ 568
Thu 4/126:15 a.m.SAN - YOW
2 stops29h 29mMultiple Airlines
Mon 8/124:15 p.m.YOW - SAN
1 stop22h 42mMultiple Airlines
Deal found 28/10C$ 573
Mon 8/121:33 p.m.SAN - YUL
2 stops23h 54mMultiple Airlines
Mon 2/28:00 a.m.YUL - SAN
1 stop29h 53mMultiple Airlines
Deal found 26/10C$ 576

Cheap flight deals from San Diego to Ontario

Keep the following information in mind while searching for San Diego to Ontario flight deals. Data was last updated 28 October 2025.

Round-trip from

C$ 469

One-way from

C$ 180

Popular in

October

Cheapest in

January

Average price

C$ 849

Good one-way deal

C$ 355 or less
American Airlines
  • American Airlines
  • 14/1-21/1
  • 2 total stops
  • 24h 15m total
  • San Diego to Ontario
Search Deals
11/12
  • 11/12
  • 1 total stop
  • 11h 33m total
  • San Diego to Ontario
Search Deals
Highest demand for flights based on searches. 19% potential increase in price (C$ 180 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease (C$ 40 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
Search Deals
Price to beat on a one-way flight from San Diego to Ontario.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from San Diego to Ontario 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 28 October 2025.
Use the filters below to find and compare flights from San Diego to Ontario that are best for you.

Fly from

San Diego

Fly to

Ontario

Route

Depart

Return

Price

San DiegoToronto

SAN - YYZ

SANYYZ

San Diego

Tue 2/12

6:20 a.m.-9:29 p.m.

1 stop12h 09m

Toronto Pearson Intl

Fri 5/12

6:00 a.m.-2:16 p.m.

1 stop11h 16m

C$ 492

San DiegoToronto

SAN - YYZ

SANYYZ

San Diego

Sun 21/12

4:47 p.m.-7:55 p.m.

2 stops24h 08m

Toronto Pearson Intl

Sun 4/1

7:55 p.m.-12:38 p.m.

1 stop19h 43m

C$ 531

San DiegoToronto

SAN - YYZ

SANYYZ

San Diego

Tue 20/1

12:40 p.m.-3:35 p.m.

2 stops23h 55m

Toronto Pearson Intl

Sat 24/1

4:45 p.m.-12:00 p.m.

2 stops22h 15m

C$ 601

San DiegoToronto

SAN - YYZ

SANYYZ

San Diego

Tue 2/12

12:43 p.m.-3:35 p.m.

2 stops23h 52m

Toronto Pearson Intl

Fri 5/12

4:45 p.m.-11:34 a.m.

2 stops21h 49m

C$ 613

San DiegoOttawa

SAN - YOW

SANYOW

San Diego

Tue 25/11

3:49 p.m.-2:44 p.m.

2 stops43h 55m

Ottawa

Tue 2/12

5:45 p.m.-11:45 a.m.

1 stop21h 00m

C$ 618

San DiegoMontreal

SAN - YUL

SANYUL

San Diego

Thu 11/12

3:47 p.m.-7:05 a.m.

2 stops12h 18m

Montreal Pierre Elliott Trudeau Intl

Mon 2/2

8:00 a.m.-10:53 a.m.

1 stop29h 53m

C$ 624

San DiegoToronto

SAN - YYZ

SANYYZ

San Diego

Fri 9/1

5:38 p.m.-3:35 p.m.

2 stops18h 57m

Toronto Pearson Intl

Fri 16/1

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

2 stops27h 00m

C$ 629

San DiegoToronto

SAN - YTZ

SANYTZ

San Diego

Wed 3/12

5:53 p.m.-1:42 p.m.

1 stop16h 49m

Toronto Island

Fri 5/12

2:30 p.m.-11:27 p.m.

1 stop11h 57m

C$ 636

San DiegoToronto

SAN - YYZ

SANYYZ

San Diego

Wed 19/11

6:15 a.m.-3:35 p.m.

1 stop30h 20m

Toronto Pearson Intl

Sun 23/11

4:45 p.m.-8:40 a.m.

2 stops18h 55m

C$ 638

San DiegoOttawa

SAN - YOW

SANYOW

San Diego

Fri 21/11

8:39 a.m.-2:44 p.m.

2 stops27h 05m

Ottawa

Sun 23/11

9:30 a.m.-8:21 p.m.

1 stop13h 51m

C$ 646

Flights are sorted by cheapest round-trip flights first.

Deals found on 27/10

Showing 1-10 of 60 results
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Best time to book a flight from San Diego to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from San Diego 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 San Diego to Ontario

What is the cheapest month to book a flight from San Diego to Region of Ontario?

Currently, December is the cheapest month in which you can book a flight from San Diego to Region of Ontario (average of C$ 27). Flying from San Diego to Region of Ontario in September is currently the most expensive (average of C$ 341). 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 SAN to ON?

Find hourly flight availability from San Diego to Ontario. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 28 October 2025.

One of the essential ways to save on airfare from San Diego to Region of Ontario is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight in the evening could potentially save you up to 67% on airfare.

Reviews of airlines servicing Ontario

Get insights into the airlines that provide service to Ontario. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Ontario. Reviews last updated 28 October 2025.
Read reviews from past customers who have flown Porter Airlines,United Airlines, andAir Canada from San Diego to Ontario. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Porter Airlines
8.0
Very good
384 reviews
Check prices

Food

7.6

Crew

8.6

Entertainment

7.0

Comfort

8.0

Boarding

8.2

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Anonymous,Sep 2025

YYZ - OPO

Very disappointing, booked with Porter airlines and changed to Air Transit last minute. Old plane, cramped seating, even the aisle was the narrowest I’ve ever seen. Very uncomfortable flight. Full meal at 130 am and only a small piece of banana bread in the morning… should be opposite.
Porter Airlines
8.0
Very good
384 reviews
Porter Airlines
8.0
Very good
384 reviews
Check prices

Food

7.6

Crew

8.6

Entertainment

7.0

Comfort

8.0

Boarding

8.2

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Anonymous,Sep 2025

YYZ - OPO

Very disappointing, booked with Porter airlines and changed to Air Transit last minute. Old plane, cramped seating, even the aisle was the narrowest I’ve ever seen. Very uncomfortable flight. Full meal at 130 am and only a small piece of banana bread in the morning… should be opposite.
United Airlines
7.4
Good
8,996 reviews
Porter Airlines
8.0
Very good
384 reviews
Check prices

Food

7.6

Crew

8.6

Entertainment

7.0

Comfort

8.0

Boarding

8.2

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Anonymous,Sep 2025

YYZ - OPO

Very disappointing, booked with Porter airlines and changed to Air Transit last minute. Old plane, cramped seating, even the aisle was the narrowest I’ve ever seen. Very uncomfortable flight. Full meal at 130 am and only a small piece of banana bread in the morning… should be opposite.
Air Canada
7.1
Good
10,370 reviews
Porter Airlines
8.0
Very good
384 reviews
Check prices

Food

7.6

Crew

8.6

Entertainment

7.0

Comfort

8.0

Boarding

8.2

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Anonymous,Sep 2025

YYZ - OPO

Very disappointing, booked with Porter airlines and changed to Air Transit last minute. Old plane, cramped seating, even the aisle was the narrowest I’ve ever seen. Very uncomfortable flight. Full meal at 130 am and only a small piece of banana bread in the morning… should be opposite.

Related info for your journey

Find useful and relevant information for your journey from San Diego to Ontario. 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 from for flights from San Diego to Ontario?

    Most people fly from San Diego (SAN) if they book a flight from San Diego to Ontario. San Diego is conveniently located just 4.2 km from San Diego’s city centre.

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

    American Airlines, Alaska Airlines, and United Airlines can get you from San Diego to Region of Ontario in just under 12h 09m. Your travel time can differ by up to 12h 11m. San Diego and Region of Ontario are separated by a distance of 3465 km. Both multi-stop and direct flights can be found to your destination and back.

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

    To fly one-way, consider booking your trip with American Airlines, which is currently one of the cheapest options available, starting at C$ 203. WestJet flights start at C$ 266 while deals on United Airlines start at C$ 327 one-way.

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

    The most popular route from San Diego to Region of Ontario is San Diego - Toronto Pearson Intl. You may also consider San Diego - Montreal Pierre Elliott Trudeau Intl or San Diego - Toronto Island.

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

    Consider Air Canada (70%), United Airlines (70%) or Air Canada Rouge (67%) when booking your flight. These represent the most reliable airlines when flying from San Diego to Region of Ontario.

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

    While on average a flight from San Diego to Region of Ontario is generally C$ 370, our data shows the cheapest flight currently is C$ 291. When looking at the most popular route, (San Diego - Toronto Pearson Intl), you can expect to pay C$ 403 for that flight.

  • Can I find deals for flights from San Diego to Ontario that include hotel bookings?

    Yes. In addition to deals on San Diego to Ontario flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from San Diego to Ontario?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from San Diego to Ontario.

  • Can I find deals for business class flights from San Diego to Ontario?

    Yes. Cheapflights offers flight deals from San Diego to Ontario 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 San Diego to Region of Ontario?

    Currently, December is the cheapest month in which you can book a flight from San Diego to Region of Ontario (average of C$ 27). Flying from San Diego to Region of Ontario in September is currently the most expensive (average of C$ 341). 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

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Alternative routes for San Diego to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
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Top 3 airlines flying from San Diego to Ontario

Discover the top 3 airlines that operate flights from San Diego to Ontario. 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 28 October 2025.
AirlineCheapestAverageFlexibilityOn-time
Porter AirlinesCheapestC$ 292AverageC$ 424FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
United AirlinesCheapestC$ 293AverageC$ 488FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Air CanadaCheapestC$ 394AverageC$ 632FlexibilityNo cancel feeOn-time67%
Search Air Canada 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 San Diego to Ontario?

Cheapflights makes it easy to find San Diego to Ontario flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

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

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Ontario from San Diego.

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

Yes, we can. To see specific flights from San Diego to Ontario with no change fees, users can toggle flexible booking options after using the search form above to find flights.

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

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

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