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$140+ 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 4/17. Fares are subject to change and may not be available on all flights or dates of travel.
SAN — YYZ
Apr 10 — Apr 171
Fri 4/10
Fri 4/17
1 adult, Economy
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Cheap 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 March 11, 2026.

This Kiwi.com deal was found by Cheapflights users on 3/9. 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.
Thu 4/237:23 pm
SAN
-
YYZ
1 stop21h 27m
Multiple Airlines
Mon 4/277:55 pm
YYZ
-
SAN
1 stop20h 22m
Multiple Airlines
Deal found 3/9$291
This Kiwi.com deal was found by Cheapflights users on 3/8. 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 4/99:02 pm
SAN
-
YYZ
1 stop30h 41m
Multiple Airlines
Mon 4/208:00 pm
YYZ
-
SAN
1 stop20h 17m
Multiple Airlines
Deal found 3/8$293
This Kiwi.com deal was found by Cheapflights users on 3/6. 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 4/138:54 pm
SAN
-
YYZ
2 stops30h 19m
Multiple Airlines
Mon 4/208:00 pm
YYZ
-
SAN
1 stop20h 17m
Multiple Airlines
Deal found 3/6$294
This Kiwi.com deal was found by Cheapflights users on 3/8. 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 4/99:02 pm
SAN
-
YYZ
1 stop30h 41m
Multiple Airlines
Wed 4/221:30 pm
YYZ
-
SAN
2 stops31h 22m
Multiple Airlines
Deal found 3/8$295
This Kiwi.com deal was found by Cheapflights users on 3/10. 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.
Mon 4/68:54 pm
SAN
-
YYZ
2 stops19h 42m
Multiple Airlines
Mon 4/208:00 pm
YYZ
-
SAN
1 stop20h 17m
Multiple Airlines
Deal found 3/10$307
This Kiwi.com deal was found by Cheapflights users on 3/8. 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 3/309:58 pm
SAN
-
YYZ
1 stop18h 57m
Multiple Airlines
Mon 4/138:00 pm
YYZ
-
SAN
1 stop20h 17m
Multiple Airlines
Deal found 3/8$308
This Kiwi.com deal was found by Cheapflights users on 3/8. 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 3/309:58 pm
SAN
-
YYZ
1 stop18h 57m
Multiple Airlines
Thu 4/167:45 am
YYZ
-
SAN
2 stops13h 07m
Multiple Airlines
Deal found 3/8$310
This Kiwi.com deal was found by Cheapflights users on 3/8. 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 4/99:02 pm
SAN
-
YYZ
1 stop30h 41m
Multiple Airlines
Sun 4/198:00 pm
YYZ
-
SAN
1 stop24h 56m
Multiple Airlines
Deal found 3/8$311
This Kiwi.com deal was found by Cheapflights users on 3/8. 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 4/12:49 pm
SAN
-
YYZ
2 stops36h 54m
Multiple Airlines
Mon 4/138:00 pm
YYZ
-
SAN
1 stop20h 17m
Multiple Airlines
Deal found 3/8$317
This Kiwi.com deal was found by Cheapflights users on 3/8. 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 3/309:58 pm
SAN
-
YYZ
1 stop18h 57m
Multiple Airlines
Fri 4/171:30 pm
YYZ
-
SAN
2 stops26h 47m
Multiple Airlines
Deal found 3/8$319
This Justfly.com deal was found by Cheapflights users on 3/10. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/133:30 pm
SAN
-
YQT
1 stop24h 30m
WestJet
Wed 5/207:50 pm
YQT
-
SAN
1 stop21h 20m
WestJet
Deal found 3/10$333
This FlightHub deal was found by Cheapflights users on 3/10. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/133:30 pm
SAN
-
YQT
1 stop24h 30m
WestJet
Thu 5/217:50 pm
YQT
-
SAN
1 stop21h 20m
WestJet
Deal found 3/10$335

Find 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 March 11, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$291
(Kiwi.com)

One-way from

$140
(Kiwi.com)

Popular in

October

Cheapest in

April

Average price

$391

Good round-trip deal

$372 or less

Good one-way deal

$214 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. 8% potential increase in price ($42 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($16 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2026
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 March 11, 2026.
Use the filters below to find and compare flights from San Diego to Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

San DiegoMontreal

SAN - YUL

SANYUL

San Diego

Tue 6/23

7:00 am-3:33 pm

Nonstop5h 33m

Montreal Pierre Elliott Trudeau Intl

Tue 6/30

9:30 pm-11:35 am

1 stop17h 05m

$414

San DiegoMontreal

SAN - YUL

SANYUL

San Diego

Tue 4/28

10:30 pm-10:40 am

1 stop9h 10m

Montreal Pierre Elliott Trudeau Intl

Wed 4/29

2:20 pm-8:46 pm

1 stop9h 26m

$435
Quickest round-trip

San DiegoMontreal

SAN - YUL

SANYUL

San Diego

Wed 8/12

7:00 am-3:33 pm

Nonstop5h 33m

Montreal Pierre Elliott Trudeau Intl

Sun 8/16

6:00 am-11:35 am

1 stop8h 35m

$454

San DiegoOttawa

SAN - YOW

SANYOW

San Diego

Sun 4/26

8:37 pm-5:07 pm

2 stops17h 30m

Ottawa

Mon 4/27

7:30 pm-11:04 am

2 stops18h 34m

$458

San DiegoToronto

SAN - YYZ

SANYYZ

San Diego

Tue 6/30

10:30 pm-8:55 am

1 stop7h 25m

Toronto Pearson Intl

Sat 7/4

12:30 pm-8:21 pm

1 stop10h 51m

$465

San DiegoToronto

SAN - YYZ

SANYYZ

San Diego

Tue 5/19

6:15 am-5:21 pm

1 stop8h 06m

Toronto Pearson Intl

Mon 5/25

6:30 am-10:37 am

1 stop7h 07m

$465

San DiegoToronto

SAN - YYZ

SANYYZ

San Diego

Tue 5/19

2:14 pm-11:59 pm

1 stop6h 45m

Toronto Pearson Intl

Sun 5/24

3:53 pm-9:24 pm

1 stop8h 31m

$465

San DiegoToronto

SAN - YYZ

SANYYZ

San Diego

Thu 7/2

6:15 am-5:23 pm

1 stop8h 08m

Toronto Pearson Intl

Fri 7/3

7:12 pm-11:19 pm

1 stop7h 07m

$465

San DiegoToronto

SAN - YYZ

SANYYZ

San Diego

Wed 7/8

10:55 am-9:32 pm

1 stop7h 37m

Toronto Pearson Intl

Mon 7/13

6:10 am-7:50 pm

1 stop16h 40m

$465

San DiegoToronto

SAN - YYZ

SANYYZ

San Diego

Wed 7/15

8:00 am-10:00 pm

1 stop11h 00m

Toronto Pearson Intl

Wed 7/22

1:30 pm-10:58 pm

1 stop12h 28m

$465

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/7

Showing 1-10 of 60 resultsSorted by cheapest first
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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, June is the cheapest month in which you can book a flight from San Diego to Region of Ontario (average of $76). Flying from San Diego to Region of Ontario in September is currently the most expensive (average of $253). 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 March 11, 2026.

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 March 11, 2026.

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 March 11, 2026.
See what other customers who have flown with Porter Airlines,Delta, andUnited 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
423 reviews

Comfort

8.0

Boarding

8.2

Crew

8.6

Food

7.6

Entertainment

7.0

Overall

8.0

Reviews

1 / 20
10.0
Excellent

John,Mar 2026

YYZ - PVR

I'm 6ft 4in. The seats don't have enough room. But was a good flight.
Porter Airlines
8.0
Very good
423 reviews
Porter Airlines
8.0
Very good
423 reviews

Comfort

8.0

Boarding

8.2

Crew

8.6

Food

7.6

Entertainment

7.0

Overall

8.0

Reviews

1 / 20
10.0
Excellent

John,Mar 2026

YYZ - PVR

I'm 6ft 4in. The seats don't have enough room. But was a good flight.
Delta
7.9
Good
8,278 reviews
Porter Airlines
8.0
Very good
423 reviews

Comfort

8.0

Boarding

8.2

Crew

8.6

Food

7.6

Entertainment

7.0

Overall

8.0

Reviews

1 / 20
10.0
Excellent

John,Mar 2026

YYZ - PVR

I'm 6ft 4in. The seats don't have enough room. But was a good flight.
United Airlines
7.4
Good
9,413 reviews
Porter Airlines
8.0
Very good
423 reviews

Comfort

8.0

Boarding

8.2

Crew

8.6

Food

7.6

Entertainment

7.0

Overall

8.0

Reviews

1 / 20
10.0
Excellent

John,Mar 2026

YYZ - PVR

I'm 6ft 4in. The seats don't have enough room. But was a good flight.
American Airlines
7.1
Good
11,421 reviews
Porter Airlines
8.0
Very good
423 reviews

Comfort

8.0

Boarding

8.2

Crew

8.6

Food

7.6

Entertainment

7.0

Overall

8.0

Reviews

1 / 20
10.0
Excellent

John,Mar 2026

YYZ - PVR

I'm 6ft 4in. The seats don't have enough room. But was a good flight.
Air Canada
7.1
Good
10,800 reviews
Porter Airlines
8.0
Very good
423 reviews

Comfort

8.0

Boarding

8.2

Crew

8.6

Food

7.6

Entertainment

7.0

Overall

8.0

Reviews

1 / 20
10.0
Excellent

John,Mar 2026

YYZ - PVR

I'm 6ft 4in. The seats don't have enough room. But was a good flight.

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 5h 33m. 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 $87 on Porter Airlines. Other airlines that offer cheap prices include Air Canada from $130 and United Airlines from $130 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 $417 for a flight from San Diego to Region of Ontario. The cheapest flight overall is $166 while the most popular route, (San Diego - Toronto Pearson Intl) is currently priced at $320.

  • 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, June is the cheapest month in which you can book a flight from San Diego to Region of Ontario (average of $76). Flying from San Diego to Region of Ontario in September is currently the most expensive (average of $253). 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 March 11, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$132Average$416FlexibilityNo cancel feeOn-timeN/A
Air TransatCheapest$146Average$288FlexibilityNo cancel feeOn-time50%
Porter AirlinesCheapest$147Average$280FlexibilityNo cancel feeOn-time52%
Air CanadaCheapest$185Average$413FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$216Average$508FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$319Average$552FlexibilityNo cancel feeOn-time71%

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