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$110+ 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 8/6. Fares are subject to change and may not be available on all flights or dates of travel.
SAN — YYZ
jun. 17 — jun. 241
mar. 6/17
mar. 6/24
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 junio 12, 2025.

Round-trip from

$225
(Trip.com)

One-way from

$110
(Mytrip)

Popular in

October

Cheapest in

January

Average price

$430

Good round-trip deal

$349 or less

Good one-way deal

$161 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. 18% potential increase in price ($85 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 June 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 junio 12, 2025.

This Trip.com deal was found by Cheapflights users on 6/10. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 8/2811:15 amSAN - YKF
1 stop10h 31mWestJet
dom. 8/316:00 amYKF - SAN
1 stop10h 20mWestJet
Deal found 6/10$225
This Kiwi.com deal was found by Cheapflights users on 6/11. 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.
jue. 7/312:05 pmSAN - YYZ
2 stops12h 46mWestJet
mié. 8/136:30 amYYZ - SAN
1 stop9h 50mWestJet
Deal found 6/11$233
This Mytrip deal was found by Cheapflights users on 6/12. 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.
dom. 8/38:10 amSAN - YUL
Nonstop5h 29mMultiple Airlines
lun. 8/117:00 amYUL - SAN
1 stop9h 20mMultiple Airlines
Deal found 6/12$262
This Mytrip deal was found by Cheapflights users on 6/12. 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.
jue. 8/711:15 amSAN - YOW
1 stop10h 26mWestJet
mié. 8/136:00 amYOW - SAN
1 stop10h 20mWestJet
Deal found 6/12$262
This Trip.com deal was found by Cheapflights users on 6/10. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 7/96:15 amSAN - YYZ
2 stops13h 39mMultiple Airlines
mar. 7/156:30 amYYZ - SAN
1 stop9h 50mMultiple Airlines
Deal found 6/10$266
This oojo deal was found by Cheapflights users on 6/10. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 7/2411:15 amSAN - YHM
1 stop10h 26mWestJet
mar. 7/296:00 amYHM - SAN
1 stop10h 20mWestJet
Deal found 6/10$266
This Kiwi.com deal was found by Cheapflights users on 6/10. 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.
lun. 7/71:00 pmSAN - YUL
1 stop15h 08mWestJet
mar. 7/157:00 amYUL - SAN
1 stop9h 20mWestJet
Deal found 6/10$269
This Air Canada deal was found by Cheapflights users on 6/11. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 8/58:10 amSAN - YUL
Nonstop5h 29mAir Canada
mar. 8/124:45 pmYUL - SAN
Nonstop5h 53mAir Canada
Deal found 6/11$296
This Mytrip deal was found by Cheapflights users on 6/10. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 7/92:05 pmSAN - YKF
2 stops26h 20mMultiple Airlines
mar. 7/156:00 amYKF - SAN
1 stop10h 20mMultiple Airlines
Deal found 6/10$297
This Air Canada deal was found by Cheapflights users on 6/12. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 8/58:10 amSAN - YOW
1 stop9h 05mAir Canada
lun. 8/112:25 pmYOW - SAN
1 stop8h 13mAir Canada
Deal found 6/12$301
This Kiwi.com deal was found by Cheapflights users on 6/12. 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. 8/711:15 amSAN - YOW
1 stop10h 26mMultiple Airlines
dom. 8/103:45 pmYOW - SAN
2 stops21h 10mMultiple Airlines
Deal found 6/12$314
This United Airlines deal was found by Cheapflights users on 6/9. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 7/139:40 pmSAN - YOW
1 stop8h 31mUnited Airlines
vie. 7/186:33 amYOW - SAN
1 stop15h 02mUnited Airlines
Deal found 6/9$316

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 junio 12, 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 - YKF

SANYKF

San Diego

jue. 8/28

11:15 am-12:46 am

1 stop10h 31m

Toronto Region of Waterloo Intl

dom. 8/31

6:00 am-1:20 pm

1 stop10h 20m

$225

San DiegoToronto

SAN - YYZ

SANYYZ

San Diego

jue. 7/31

2:05 pm-5:51 am

2 stops12h 46m

Toronto Pearson Intl

mié. 8/13

6:30 am-1:20 pm

1 stop9h 50m

$233

San DiegoMontreal

SAN - YUL

SANYUL

San Diego

dom. 8/3

8:10 am-4:39 pm

Nonstop5h 29m

Montreal Pierre Elliott Trudeau Intl

lun. 8/11

7:00 am-1:20 pm

1 stop9h 20m

$262

San DiegoOttawa

SAN - YOW

SANYOW

San Diego

jue. 8/7

11:15 am-12:41 am

1 stop10h 26m

Ottawa

mié. 8/13

6:00 am-1:20 pm

1 stop10h 20m

$262

San DiegoToronto

SAN - YYZ

SANYYZ

San Diego

mié. 7/9

6:15 am-10:54 pm

2 stops13h 39m

Toronto Pearson Intl

mar. 7/15

6:30 am-1:20 pm

1 stop9h 50m

$266

San DiegoHamilton

SAN - YHM

SANYHM

San Diego

jue. 7/24

11:15 am-12:41 am

1 stop10h 26m

Hamilton

mar. 7/29

6:00 am-1:20 pm

1 stop10h 20m

$266

San DiegoMontreal

SAN - YUL

SANYUL

San Diego

lun. 7/7

1:00 pm-7:08 am

1 stop15h 08m

Montreal Pierre Elliott Trudeau Intl

mar. 7/15

7:00 am-1:20 pm

1 stop9h 20m

$269

San DiegoMontreal

SAN - YUL

SANYUL

San Diego

mar. 8/5

8:10 am-4:39 pm

Nonstop5h 29m

Montreal Pierre Elliott Trudeau Intl

mar. 8/12

4:45 pm-7:38 pm

Nonstop5h 53m

$296

San DiegoToronto

SAN - YKF

SANYKF

San Diego

mié. 7/9

2:05 pm-7:25 pm

2 stops26h 20m

Toronto Region of Waterloo Intl

mar. 7/15

6:00 am-1:20 pm

1 stop10h 20m

$297

San DiegoOttawa

SAN - YOW

SANYOW

San Diego

mar. 8/5

8:10 am-8:15 pm

1 stop9h 05m

Ottawa

lun. 8/11

2:25 pm-7:38 pm

1 stop8h 13m

$301

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/12

Showing 1-10 of 54 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 July is currently the most expensive (average of $353). 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 junio 12, 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 junio 12, 2025.

The most flights from SAN to CAON are scheduled on a Monday (4 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (2 on average).

Rainfall in Ontario by month

Plan your trip to Ontario by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Region of Ontario ranges from 2.0 - 3.3 inches per month. June is typically the wettest month, when rainfall can reach 3.3 in. February is typically the driest time to visit Region of Ontario when rainfall is around 2.0 in.

Temperature in Ontario by month

Plan your trip to Ontario by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Region of Ontario, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 69.8 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 21.2 F).

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 junio 12, 2025.
Read through reviews of airlines operating flights from San Diego to Ontario, such as Alaska Airlines, Porter Airlines and Delta. 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.
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Crew

8.5

Overall

8.0

Comfort

7.8

Boarding

8.1

Food

7.1

Reviews

1 / 20
10.0
Excellent

Surinder,May 2025

SEA - YYZ

My wife wanted the aile seat and I always prefer window seat. Luckily we both got the best seats we wanted. The plane was very nice and we enjoyed the best take off and the smooth landing at Toronto. All the services by the staff inside the aeroplane were very nice well appreciated. Thanks again and hope to see you soon.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Crew

8.5

Overall

8.0

Comfort

7.8

Boarding

8.1

Food

7.1

Reviews

1 / 20
10.0
Excellent

Surinder,May 2025

SEA - YYZ

My wife wanted the aile seat and I always prefer window seat. Luckily we both got the best seats we wanted. The plane was very nice and we enjoyed the best take off and the smooth landing at Toronto. All the services by the staff inside the aeroplane were very nice well appreciated. Thanks again and hope to see you soon.
Porter Airlines
8.0
Very good
288 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Crew

8.5

Overall

8.0

Comfort

7.8

Boarding

8.1

Food

7.1

Reviews

1 / 20
10.0
Excellent

Surinder,May 2025

SEA - YYZ

My wife wanted the aile seat and I always prefer window seat. Luckily we both got the best seats we wanted. The plane was very nice and we enjoyed the best take off and the smooth landing at Toronto. All the services by the staff inside the aeroplane were very nice well appreciated. Thanks again and hope to see you soon.
Delta
8.0
Very good
7,950 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Crew

8.5

Overall

8.0

Comfort

7.8

Boarding

8.1

Food

7.1

Reviews

1 / 20
10.0
Excellent

Surinder,May 2025

SEA - YYZ

My wife wanted the aile seat and I always prefer window seat. Luckily we both got the best seats we wanted. The plane was very nice and we enjoyed the best take off and the smooth landing at Toronto. All the services by the staff inside the aeroplane were very nice well appreciated. Thanks again and hope to see you soon.
United Airlines
7.4
Good
8,790 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Crew

8.5

Overall

8.0

Comfort

7.8

Boarding

8.1

Food

7.1

Reviews

1 / 20
10.0
Excellent

Surinder,May 2025

SEA - YYZ

My wife wanted the aile seat and I always prefer window seat. Luckily we both got the best seats we wanted. The plane was very nice and we enjoyed the best take off and the smooth landing at Toronto. All the services by the staff inside the aeroplane were very nice well appreciated. Thanks again and hope to see you soon.
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Crew

8.5

Overall

8.0

Comfort

7.8

Boarding

8.1

Food

7.1

Reviews

1 / 20
10.0
Excellent

Surinder,May 2025

SEA - YYZ

My wife wanted the aile seat and I always prefer window seat. Luckily we both got the best seats we wanted. The plane was very nice and we enjoyed the best take off and the smooth landing at Toronto. All the services by the staff inside the aeroplane were very nice well appreciated. Thanks again and hope to see you soon.

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 $110 on WestJet. Other airlines that offer cheap prices include Air Canada from $117 and American Airlines from $128 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 (82%), Air Transat (82%) or United Airlines (63%) 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 $948 for a flight from San Diego to Region of Ontario. The cheapest flight overall is $133 while the most popular route, (San Diego - Toronto Pearson Intl) is currently priced at $263.

  • 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 July is currently the most expensive (average of $353). 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 junio 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
Porter AirlinesCheapest$139Average$314FlexibilityNo cancel feeOn-time52%
Air TransatCheapest$146Average$308FlexibilityNo cancel feeOn-time50%
Air CanadaCheapest$153Average$427FlexibilityNo cancel feeOn-time67%
DeltaCheapest$154Average$377FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$229Average$513FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$317Average$534FlexibilityNo cancel feeOn-time71%

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