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Ontario

$129+ Cheap flights from San Diego (SAN) to Ontario

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 12/11. Fares are subject to change and may not be available on all flights or dates of travel.
SAN — YYZ
nov. 27 — dic. 41
jue. 11/27
jue. 12/4
1 adult, Economy
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Find flight deals from San Diego to Ontario

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 octubre 28, 2025.

This American Airlines deal was found by Cheapflights users on 10/26. 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.
sáb. 12/136:15 amSAN - YYZ
1 stop12h 14mAmerican Airlines
sáb. 1/101:14 pmYYZ - SAN
1 stop12h 12mAmerican Airlines
Deal found 10/26$341
This Kiwi.com deal was found by Cheapflights users on 10/26. 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.
mié. 11/198:00 amSAN - YYZ
2 stops21h 38mMultiple Airlines
dom. 11/237:55 pmYYZ - SAN
1 stop22h 32mMultiple Airlines
Deal found 10/26$343
This American Airlines deal was found by Cheapflights users on 10/27. 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.
mar. 12/26:20 amSAN - YYZ
1 stop12h 09mAmerican Airlines
vie. 12/56:00 amYYZ - SAN
1 stop11h 16mAmerican Airlines
Deal found 10/27$344
This American Airlines deal was found by Cheapflights users on 10/26. 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.
lun. 11/176:19 amSAN - YYZ
1 stop12h 10mAmerican Airlines
mar. 11/1811:32 amYYZ - SAN
1 stop12h 16mAmerican Airlines
Deal found 10/26$346
This Kiwi.com deal was found by Cheapflights users on 10/27. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 12/151:33 pmSAN - YYZ
1 stop13h 47mMultiple Airlines
mié. 12/319:35 amYYZ - SAN
1 stop28h 02mMultiple Airlines
Deal found 10/27$347
This Kiwi.com deal was found by Cheapflights users on 10/26. 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.
vie. 12/512:35 pmSAN - YYZ
1 stop8h 51mMultiple Airlines
dom. 12/77:55 pmYYZ - SAN
1 stop19h 43mMultiple Airlines
Deal found 10/26$348
This Kiwi.com deal was found by Cheapflights users on 10/25. 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.
vie. 11/218:39 amSAN - YYZ
2 stops20h 59mMultiple Airlines
mié. 11/269:35 amYYZ - SAN
1 stop8h 52mMultiple Airlines
Deal found 10/25$349
This Kiwi.com deal was found by Cheapflights users on 10/28. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 11/226:52 pmSAN - YYZ
1 stop8h 28mMultiple Airlines
jue. 11/277:55 pmYYZ - SAN
1 stop15h 45mMultiple Airlines
Deal found 10/28$350
This Kiwi.com deal was found by Cheapflights users on 10/27. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 11/226:52 pmSAN - YYZ
1 stop8h 28mMultiple Airlines
mié. 11/269:40 amYYZ - SAN
2 stops25h 14mMultiple Airlines
Deal found 10/27$359
This Kiwi.com deal was found by Cheapflights users on 10/28. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 12/116:15 amSAN - YUL
2 stops31h 12mMultiple Airlines
sáb. 12/136:00 pmYUL - SAN
1 stop20h 45mMultiple Airlines
Deal found 10/28$406
This Kiwi.com deal was found by Cheapflights users on 10/28. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 12/46:15 amSAN - YOW
2 stops29h 29mMultiple Airlines
lun. 12/84:15 pmYOW - SAN
1 stop22h 42mMultiple Airlines
Deal found 10/28$410
This Kiwi.com deal was found by Cheapflights users on 10/26. 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.
lun. 12/81:33 pmSAN - YUL
2 stops23h 54mMultiple Airlines
lun. 2/28:00 amYUL - SAN
1 stop29h 53mMultiple Airlines
Deal found 10/26$412

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 octubre 28, 2025.

Most accurate provider

Justfly.com
3 stars

Most trusted provider

Justfly.com
3 stars

Round-trip from

$335
(American Airlines)

One-way from

$129
(Trip.com)

Popular in

October

Cheapest in

January

Average price

$607

Good round-trip deal

$642 or less

Good one-way deal

$241 or less
Provider with most accurate pricing for San Diego-Toronto (YTO) flight deals.
Search Deals
Provider most trusted by Cheapflights users for San Diego-Toronto (YTO) flights.
Search Deals
From San Diego to Ontario
Search Deals
One-way flight from San Diego to Ontario
Search Deals
Highest demand for flights based on searches. 19% potential increase in price ($92 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($21 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 San Diego to Ontario.
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 2,558,603 searches. Data last updated octubre 28, 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

dom. 12/21

1:06 pm-6:20 am

1 stop14h 14m

Toronto Pearson Intl

dom. 1/4

7:55 pm-12:38 pm

1 stop19h 43m

$351

San DiegoToronto

SAN - YYZ

SANYYZ

San Diego

mar. 12/2

6:20 am-9:29 pm

1 stop12h 09m

Toronto Pearson Intl

vie. 12/5

6:00 am-2:16 pm

1 stop11h 16m

$351

San DiegoToronto

SAN - YTZ

SANYTZ

San Diego

mié. 1/21

5:10 pm-1:42 pm

1 stop17h 32m

Toronto Island

vie. 1/23

9:15 am-6:31 pm

1 stop12h 16m

$392

San DiegoToronto

SAN - YYZ

SANYYZ

San Diego

mié. 11/12

8:59 pm-6:20 am

1 stop30h 21m

Toronto Pearson Intl

vie. 11/14

7:55 pm-8:40 am

1 stop15h 45m

$406

San DiegoOttawa

SAN - YOW

SANYOW

San Diego

jue. 12/4

6:15 am-2:44 pm

2 stops29h 29m

Ottawa

lun. 12/8

4:15 pm-11:57 am

1 stop22h 42m

$410

San DiegoOttawa

SAN - YOW

SANYOW

San Diego

vie. 12/5

12:35 pm-12:40 am

1 stop9h 05m

Ottawa

lun. 12/8

9:35 am-10:46 pm

2 stops40h 11m

$415

San DiegoToronto

SAN - YYZ

SANYYZ

San Diego

lun. 11/17

7:00 am-9:07 pm

2 stops11h 07m

Toronto Pearson Intl

mar. 11/18

12:40 pm-8:40 am

1 stop23h 00m

$427

San DiegoToronto

SAN - YYZ

SANYYZ

San Diego

mar. 12/2

12:43 pm-3:35 pm

2 stops23h 52m

Toronto Pearson Intl

vie. 12/5

4:45 pm-11:34 am

2 stops21h 49m

$438

San DiegoOttawa

SAN - YOW

SANYOW

San Diego

mar. 11/25

3:49 pm-2:44 pm

2 stops43h 55m

Ottawa

mar. 12/2

5:45 pm-11:45 am

1 stop21h 00m

$442

San DiegoMontreal

SAN - YUL

SANYUL

San Diego

jue. 12/11

3:47 pm-7:05 am

2 stops12h 18m

Montreal Pierre Elliott Trudeau Intl

lun. 2/2

8:00 am-10:53 am

1 stop29h 53m

$446

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/27

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 $19). Flying from San Diego to Region of Ontario in September 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 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 octubre 28, 2025.

It’s optimal to fly from San Diego to Region of Ontario at noon. By choosing this option you can save up to 47% on the cost of your flight, compared to a flight in the evening.

What is the cheapest day to fly from San Diego to Region of Ontario?

Use this chart to determine the cheapest time to fly round-trip from San Diego to Ontario. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their San Diego to Region of Ontario flight should consider departing on Wednesday at noon when fares are most often at their lowest. Monday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

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 octubre 28, 2025.
See what other customers who have flown with Porter Airlines, Delta, and United Airlines from San Diego to Ontario have to say. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Porter Airlines
8.0
Very good
384 reviews

Boarding

8.2

Entertainment

7.0

Crew

8.6

Comfort

8.0

Overall

8.0

Food

7.6

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

Boarding

8.2

Entertainment

7.0

Crew

8.6

Comfort

8.0

Overall

8.0

Food

7.6

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.
Delta
7.9
Good
7,995 reviews
Porter Airlines
8.0
Very good
384 reviews

Boarding

8.2

Entertainment

7.0

Crew

8.6

Comfort

8.0

Overall

8.0

Food

7.6

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

Boarding

8.2

Entertainment

7.0

Crew

8.6

Comfort

8.0

Overall

8.0

Food

7.6

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.
American Airlines
7.2
Good
11,033 reviews
Porter Airlines
8.0
Very good
384 reviews

Boarding

8.2

Entertainment

7.0

Crew

8.6

Comfort

8.0

Overall

8.0

Food

7.6

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

Boarding

8.2

Entertainment

7.0

Crew

8.6

Comfort

8.0

Overall

8.0

Food

7.6

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?

    If you book a flight to Ontario from San Diego, you will be flying from San Diego, which is the city’s only airport. San Diego (SAN) is located 2.6 mi from the center of San Diego.

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

    Departing from San Diego to Region of Ontario will take you 9h 54m. Airlines will cover a distance of 2453 mi. Both multi-stop and nonstop 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?

    One-way options have recently been found by users for as low as $145 on American Airlines. Other airlines that offer cheap prices include WestJet from $190 and United Airlines from $234 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 - Sarnia or San Diego - Toronto Island.

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

    No one likes to see their flight delayed. When booking a flight from San Diego to Region of Ontario consider choosing Air Canada (70%), United Airlines (70%) or Air Canada Rouge (67%) as they are the most reliable in getting you off to your destination on time.

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

    On average you can expect to pay $709 for a flight from San Diego to Region of Ontario. The cheapest flight overall is $203 while the most popular route, (San Diego - Toronto Pearson Intl) is currently priced at $288.

  • 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 $19). Flying from San Diego to Region of Ontario in September 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

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Top 6 airlines flying from San Diego to Ontario

Discover the top 6 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 2,558,603 searches. Data last updated octubre 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
Porter AirlinesCheapest$138Average$314FlexibilityNo cancel feeOn-time52%
Air CanadaCheapest$145Average$403FlexibilityNo cancel feeOn-time67%
Air TransatCheapest$146Average$308FlexibilityNo cancel feeOn-time50%
United AirlinesCheapest$220Average$491FlexibilityNo cancel feeOn-time69%
DeltaCheapest$317Average$425FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$319Average$541FlexibilityNo cancel feeOn-time71%

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