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$114+ 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 10/1. Fares are subject to change and may not be available on all flights or dates of travel.
SAN — YYZ
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
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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 September 11, 2025.

Round-trip from

$290
(Trip.com)

One-way from

$114
(Trip.com)

Popular in

October

Cheapest in

January

Average price

$467

Good round-trip deal

$425 or less

Good one-way deal

$236 or less
From San Diego to Ontario
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One-way flight from San Diego to Ontario
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Highest demand for flights based on searches. 16% potential increase in price ($76 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($11 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Price to beat on a round-trip flight from San Diego to Ontario.
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Price to beat on a one-way flight from San Diego to Ontario.
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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 September 11, 2025.

This Trip.com deal was found by Cheapflights users on 9/9. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/2112:33 pmSAN - YOW
2 stops33h 07mMultiple Airlines
Wed 9/246:00 amYOW - SAN
1 stop10h 20mMultiple Airlines
Deal found 9/9$290
This Kiwi.com deal was found by Cheapflights users on 9/10. 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.
Fri 10/246:25 amSAN - YYZ
1 stop10h 33mMultiple Airlines
Wed 10/299:35 amYYZ - SAN
1 stop12h 33mMultiple Airlines
Deal found 9/10$304
This Kiwi.com deal was found by Cheapflights users on 9/11. 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.
Wed 10/158:00 amSAN - YYZ
1 stop8h 45mMultiple Airlines
Thu 10/239:45 amYYZ - SAN
1 stop16h 19mMultiple Airlines
Deal found 9/11$305
This Kiwi.com deal was found by Cheapflights users on 9/10. 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.
Fri 10/36:15 amSAN - YYZ
1 stop10h 43mMultiple Airlines
Mon 10/610:05 amYYZ - SAN
1 stop8h 58mMultiple Airlines
Deal found 9/10$307
This Kiwi.com deal was found by Cheapflights users on 9/10. 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.
Thu 10/96:25 amSAN - YYZ
1 stop10h 20mMultiple Airlines
Tue 10/217:15 amYYZ - SAN
1 stop14h 31mMultiple Airlines
Deal found 9/10$308
This Kiwi.com deal was found by Cheapflights users on 9/9. 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.
Mon 9/156:25 amSAN - YYZ
2 stops20h 48mMultiple Airlines
Mon 9/229:45 amYYZ - SAN
1 stop16h 32mMultiple Airlines
Deal found 9/9$309
This Kiwi.com deal was found by Cheapflights users on 9/9. 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.
Fri 10/242:05 pmSAN - YOW
1 stop19h 55mMultiple Airlines
Fri 10/315:40 amYOW - SAN
2 stops21h 08mMultiple Airlines
Deal found 9/9$310
This Kiwi.com deal was found by Cheapflights users on 9/11. 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.
Fri 10/171:54 pmSAN - YYZ
2 stops13h 58mMultiple Airlines
Thu 10/239:45 amYYZ - SAN
1 stop11h 39mMultiple Airlines
Deal found 9/11$311
This Kiwi.com deal was found by Cheapflights users on 9/9. 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.
Tue 9/231:35 pmSAN - YYZ
1 stop27h 23mMultiple Airlines
Thu 9/259:45 amYYZ - SAN
1 stop16h 49mMultiple Airlines
Deal found 9/9$312
This Kiwi.com deal was found by Cheapflights users on 9/10. 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.
Fri 10/106:25 amSAN - YYZ
1 stop20h 55mMultiple Airlines
Wed 10/159:30 amYYZ - SAN
1 stop14h 50mMultiple Airlines
Deal found 9/10$313
This Kiwi.com deal was found by Cheapflights users on 9/10. 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.
Fri 10/105:59 pmSAN - YYZ
1 stop9h 21mMultiple Airlines
Thu 10/2312:00 pmYYZ - SAN
2 stops14h 04mMultiple Airlines
Deal found 9/10$314
This Kiwi.com deal was found by Cheapflights users on 9/10. 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.
Sat 10/118:00 amSAN - YYZ
2 stops11h 52mMultiple Airlines
Tue 10/217:15 amYYZ - SAN
1 stop14h 31mMultiple Airlines
Deal found 9/10$315

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 September 11, 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 DiegoOttawa

SAN - YOW

SANYOW

San Diego

Sun 9/21

12:33 pm-12:40 am

2 stops33h 07m

Ottawa

Wed 9/24

6:00 am-1:20 pm

1 stop10h 20m

$290

San DiegoToronto

SAN - YYZ

SANYYZ

San Diego

Thu 10/16

6:25 am-10:52 pm

2 stops13h 27m

Toronto Pearson Intl

Mon 10/27

12:50 pm-8:07 pm

1 stop10h 17m

$318

San DiegoToronto

SAN - YYZ

SANYYZ

San Diego

Sat 11/8

2:16 pm-11:59 pm

1 stop6h 43m

Toronto Pearson Intl

Tue 11/11

9:00 am-11:38 am

Nonstop5h 38m

$347

San DiegoMontreal

SAN - YUL

SANYUL

San Diego

Thu 10/16

5:01 pm-10:40 am

1 stop14h 39m

Montreal Pierre Elliott Trudeau Intl

Sat 10/18

6:15 am-10:14 pm

1 stop18h 59m

$348

San DiegoMontreal

SAN - YUL

SANYUL

San Diego

Sat 11/15

10:00 pm-11:59 am

1 stop10h 59m

Montreal Pierre Elliott Trudeau Intl

Tue 11/18

12:45 pm-8:13 pm

1 stop10h 28m

$348

San DiegoMontreal

SAN - YUL

SANYUL

San Diego

Wed 10/1

8:08 pm-8:16 am

1 stop9h 08m

Montreal Pierre Elliott Trudeau Intl

Wed 10/8

4:55 pm-10:14 pm

1 stop8h 19m

$348

San DiegoMontreal

SAN - YUL

SANYUL

San Diego

Wed 10/15

6:00 pm-8:16 am

1 stop11h 16m

Montreal Pierre Elliott Trudeau Intl

Tue 10/21

3:41 pm-9:24 pm

1 stop8h 43m

$348

San DiegoMontreal

SAN - YUL

SANYUL

San Diego

Thu 10/16

5:01 pm-10:40 am

1 stop14h 39m

Montreal Pierre Elliott Trudeau Intl

Tue 10/21

3:41 pm-9:24 pm

1 stop8h 43m

$348

San DiegoMontreal

SAN - YUL

SANYUL

San Diego

Fri 11/14

5:15 pm-2:00 pm

1 stop17h 45m

Montreal Pierre Elliott Trudeau Intl

Mon 11/17

3:00 pm-9:12 pm

1 stop9h 12m

$348

San DiegoMontreal

SAN - YUL

SANYUL

San Diego

Thu 10/2

4:07 pm-10:40 am

2 stops15h 33m

Montreal Pierre Elliott Trudeau Intl

Mon 10/6

6:30 pm-12:15 am

1 stop8h 45m

$353

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/9

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, January is the cheapest month in which you can book a flight from San Diego to Region of Ontario (average of $243). Flying from San Diego to Region of Ontario in August is currently the most expensive (average of $348). 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 September 11, 2025.

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

Weekly flight availability from San Diego to Region of Ontario

Explore weekly flight availability from San Diego to Ontario. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated September 11, 2025.

The most flights from SAN to CAON are scheduled on a Monday (2 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (2 on average).

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 September 11, 2025.
See what other customers who have flown with Delta, Porter Airlines, 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.
Delta
8.0
Very good
7,960 reviews

Crew

8.5

Food

7.3

Overall

8.0

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Delta
8.0
Very good
7,960 reviews
Delta
8.0
Very good
7,960 reviews

Crew

8.5

Food

7.3

Overall

8.0

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Porter Airlines
7.9
Good
363 reviews
Delta
8.0
Very good
7,960 reviews

Crew

8.5

Food

7.3

Overall

8.0

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
United Airlines
7.4
Good
8,937 reviews
Delta
8.0
Very good
7,960 reviews

Crew

8.5

Food

7.3

Overall

8.0

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,960 reviews

Crew

8.5

Food

7.3

Overall

8.0

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Air Canada
7.1
Good
10,000 reviews
Delta
8.0
Very good
7,960 reviews

Crew

8.5

Food

7.3

Overall

8.0

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

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 10h 59m. 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 Delta. Other airlines that offer cheap prices include United Airlines from $145 and Air Canada from $149 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 cheapest flights from San Diego to Region of Ontario?

    On average you can expect to pay $454 for a flight from San Diego to Region of Ontario. The cheapest flight overall is $187 while the most popular route, (San Diego - Toronto Pearson Intl) is currently priced at $242.

  • 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, January is the cheapest month in which you can book a flight from San Diego to Region of Ontario (average of $243). Flying from San Diego to Region of Ontario in August is currently the most expensive (average of $348). 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 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 September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
Porter AirlinesCheapest$138Average$314FlexibilityNo cancel feeOn-time52%
Air TransatCheapest$146Average$308FlexibilityNo cancel feeOn-time50%
Air CanadaCheapest$149Average$400FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$223Average$496FlexibilityNo cancel feeOn-time69%
DeltaCheapest$317Average$388FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$319Average$541FlexibilityNo cancel feeOn-time71%

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