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Ontario

$133+ 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 8/8. Fares are subject to change and may not be available on all flights or dates of travel.
SAN — YYZ
ago. 3 — ago. 101
dom. 8/3
dom. 8/10
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 julio 29, 2025.

Round-trip from

$275
(Kiwi.com)

One-way from

$133
(Kiwi.com)

Popular in

October

Cheapest in

January

Average price

$418

Good round-trip deal

$425 or less

Good one-way deal

$306 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 ($10 potential savings vs. average RT price).
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Average for round-trip flights in July 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 julio 29, 2025.

This Kiwi.com deal was found by Cheapflights users on 7/26. 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. 10/106:25 amSAN - YYZ
1 stop10h 33mMultiple Airlines
lun. 10/139:45 amYYZ - SAN
1 stop16h 19mMultiple Airlines
Deal found 7/26$275
This Kiwi.com deal was found by Cheapflights users on 7/27. 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.
jue. 8/2811:15 amSAN - YYZ
1 stop8h 39mWestJet
vie. 9/126:30 amYYZ - SAN
1 stop9h 50mWestJet
Deal found 7/27$300
This Trip.com deal was found by Cheapflights users on 7/28. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 8/2111:15 amSAN - YKF
1 stop10h 31mWestJet
dom. 8/246:00 amYKF - SAN
1 stop10h 20mWestJet
Deal found 7/28$310
This Kiwi.com deal was found by Cheapflights users on 7/27. 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.
jue. 8/2811:15 amSAN - YUL
1 stop10h 28mWestJet
sáb. 9/135:30 pmYUL - SAN
1 stop22h 50mWestJet
Deal found 7/27$316
This Kiwi.com deal was found by Cheapflights users on 7/27. 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.
jue. 8/2811:15 amSAN - YUL
1 stop10h 28mMultiple Airlines
vie. 9/128:10 amYUL - SAN
2 stops28h 16mMultiple Airlines
Deal found 7/27$328
This Kiwi.com deal was found by Cheapflights users on 7/26. 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. 10/245:19 pmSAN - YTZ
1 stop15h 58mMultiple Airlines
mar. 10/282:30 pmYTZ - SAN
1 stop10h 49mMultiple Airlines
Deal found 7/26$338
This Booking.com deal was found by Cheapflights users on 7/27. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 9/1012:25 pmSAN - YUL
1 stop9h 15mAir Canada
mié. 9/175:00 amYUL - SAN
1 stop9h 31mAir Canada
Deal found 7/27$346
This Trip.com deal was found by Cheapflights users on 7/29. 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.
jue. 8/2811:15 amSAN - YHM
1 stop10h 26mWestJet
vie. 9/56:00 amYHM - SAN
1 stop10h 20mWestJet
Deal found 7/29$351
This American Airlines deal was found by Cheapflights users on 7/29. 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. 8/1910:54 pmSAN - YUL
1 stop10h 22mAmerican Airlines
mié. 8/203:44 pmYUL - SAN
1 stop19h 38mAmerican Airlines
Deal found 7/29$356
This United Airlines deal was found by Cheapflights users on 7/27. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 8/258:11 pmSAN - YUL
1 stop9h 05mUnited Airlines
sáb. 9/136:30 pmYUL - SAN
1 stop8h 45mUnited Airlines
Deal found 7/27$357
This Delta deal was found by Cheapflights users on 7/27. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 9/271:25 pmSAN - YUL
1 stop6h 53mDelta
mar. 10/1412:36 pmYUL - SAN
1 stop11h 44mDelta
Deal found 7/27$358
This Mytrip deal was found by Cheapflights users on 7/29. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 8/206:15 amSAN - YKF
2 stops15h 31mMultiple Airlines
mar. 8/266:00 amYKF - SAN
1 stop10h 20mMultiple Airlines
Deal found 7/29$361

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 julio 29, 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

vie. 10/10

6:25 am-7:58 pm

1 stop10h 33m

Toronto Pearson Intl

lun. 10/13

9:45 am-11:04 pm

1 stop16h 19m

$275

San DiegoToronto

SAN - YYZ

SANYYZ

San Diego

jue. 8/28

11:15 am-10:54 pm

1 stop8h 39m

Toronto Pearson Intl

vie. 9/12

6:30 am-1:20 pm

1 stop9h 50m

$300

San DiegoToronto

SAN - YKF

SANYKF

San Diego

jue. 8/21

11:15 am-12:46 am

1 stop10h 31m

Toronto Region of Waterloo Intl

dom. 8/24

6:00 am-1:20 pm

1 stop10h 20m

$310

San DiegoMontreal

SAN - YUL

SANYUL

San Diego

jue. 8/28

11:15 am-12:43 am

1 stop10h 28m

Montreal Pierre Elliott Trudeau Intl

sáb. 9/13

5:30 pm-1:20 pm

1 stop22h 50m

$316

San DiegoMontreal

SAN - YUL

SANYUL

San Diego

jue. 8/28

11:15 am-12:43 am

1 stop10h 28m

Montreal Pierre Elliott Trudeau Intl

vie. 9/12

8:10 am-9:26 am

2 stops28h 16m

$328

San DiegoToronto

SAN - YTZ

SANYTZ

San Diego

vie. 10/24

5:19 pm-12:17 pm

1 stop15h 58m

Toronto Island

mar. 10/28

2:30 pm-10:19 pm

1 stop10h 49m

$338

San DiegoMontreal

SAN - YUL

SANYUL

San Diego

mié. 9/10

12:25 pm-12:40 am

1 stop9h 15m

Montreal Pierre Elliott Trudeau Intl

mié. 9/17

5:00 am-11:31 am

1 stop9h 31m

$346

San DiegoHamilton

SAN - YHM

SANYHM

San Diego

jue. 8/28

11:15 am-12:41 am

1 stop10h 26m

Hamilton

vie. 9/5

6:00 am-1:20 pm

1 stop10h 20m

$351

San DiegoMontreal

SAN - YUL

SANYUL

San Diego

mar. 8/19

10:54 pm-12:16 pm

1 stop10h 22m

Montreal Pierre Elliott Trudeau Intl

mié. 8/20

3:44 pm-8:22 am

1 stop19h 38m

$356

San DiegoMontreal

SAN - YUL

SANYUL

San Diego

lun. 8/25

8:11 pm-8:16 am

1 stop9h 05m

Montreal Pierre Elliott Trudeau Intl

mié. 9/10

9:45 am-3:50 pm

1 stop9h 05m

$357

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/26

Showing 1-10 of 41 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 julio 29, 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.

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

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 julio 29, 2025.
See what other customers who have flown with Delta, United Airlines, and American 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
7,979 reviews

Overall

8.0

Food

7.3

Crew

8.5

Boarding

8.2

Entertainment

7.9

Comfort

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
7,979 reviews
Delta
8.0
Very good
7,979 reviews

Overall

8.0

Food

7.3

Crew

8.5

Boarding

8.2

Entertainment

7.9

Comfort

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
8,896 reviews
Delta
8.0
Very good
7,979 reviews

Overall

8.0

Food

7.3

Crew

8.5

Boarding

8.2

Entertainment

7.9

Comfort

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
7,979 reviews

Overall

8.0

Food

7.3

Crew

8.5

Boarding

8.2

Entertainment

7.9

Comfort

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.
WestJet
7.2
Good
2,972 reviews
Delta
8.0
Very good
7,979 reviews

Overall

8.0

Food

7.3

Crew

8.5

Boarding

8.2

Entertainment

7.9

Comfort

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
9,826 reviews
Delta
8.0
Very good
7,979 reviews

Overall

8.0

Food

7.3

Crew

8.5

Boarding

8.2

Entertainment

7.9

Comfort

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.

  • 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 $136 on WestJet. Other airlines that offer cheap prices include Air Canada from $147 and Delta from $151 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?

    No one likes to see their flight delayed. When booking a flight from San Diego to Region of Ontario consider choosing Porter Airlines (71%), Air Transat (71%) or Air Canada (68%) 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 $905 for a flight from San Diego to Region of Ontario. The cheapest flight overall is $182 while the most popular route, (San Diego - Toronto Pearson Intl) is currently priced at $258.

  • 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 julio 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
Porter AirlinesCheapest$139Average$315FlexibilityNo cancel feeOn-time52%
Air TransatCheapest$146Average$308FlexibilityNo cancel feeOn-time50%
Air CanadaCheapest$149Average$408FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$224Average$504FlexibilityNo cancel feeOn-time69%
DeltaCheapest$317Average$390FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$319Average$464FlexibilityNo cancel feeOn-time71%

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