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Cheap flights from San Diego to Ontario from C$ 187

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 6/5. Fares are subject to change and may not be available on all flights or dates of travel.
SAN — YYZ
14 Apr — 21 Apr1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from San Diego to Ontario

Enter your travel dates to find the best prices.

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 15 March 2026.

Tue 7/45:20 p.m.
SAN
-
YYZ
2 stops23h 16m
Multiple Airlines
Mon 20/48:00 p.m.
YYZ
-
SAN
1 stop20h 17m
Multiple Airlines
Deal found 12/3C$ 417
Mon 6/48:54 p.m.
SAN
-
YYZ
2 stops19h 42m
Multiple Airlines
Mon 20/48:00 p.m.
YYZ
-
SAN
1 stop20h 17m
Multiple Airlines
Deal found 10/3C$ 421
Thu 9/49:02 p.m.
SAN
-
YYZ
1 stop30h 41m
Multiple Airlines
Tue 21/41:30 p.m.
YYZ
-
SAN
2 stops26h 47m
Multiple Airlines
Deal found 12/3C$ 423
Thu 9/49:02 p.m.
SAN
-
YYZ
1 stop30h 41m
Multiple Airlines
Mon 20/48:00 p.m.
YYZ
-
SAN
1 stop20h 17m
Multiple Airlines
Deal found 12/3C$ 425
Wed 13/510:07 p.m.
SAN
-
YYZ
1 stop19h 02m
Multiple Airlines
Tue 19/57:00 a.m.
YYZ
-
SAN
2 stops27h 15m
Multiple Airlines
Deal found 12/3C$ 431
Tue 12/510:07 p.m.
SAN
-
YYZ
2 stops28h 38m
Multiple Airlines
Thu 21/57:00 a.m.
YYZ
-
SAN
1 stop10h 10m
Multiple Airlines
Deal found 12/3C$ 434
Tue 12/510:07 p.m.
SAN
-
YYZ
2 stops28h 38m
Multiple Airlines
Fri 22/57:00 a.m.
YYZ
-
SAN
1 stop10h 10m
Multiple Airlines
Deal found 12/3C$ 435
Wed 13/510:07 p.m.
SAN
-
YYZ
2 stops28h 03m
Multiple Airlines
Sat 23/57:00 a.m.
YYZ
-
SAN
1 stop10h 10m
Multiple Airlines
Deal found 11/3C$ 440
Wed 13/510:07 p.m.
SAN
-
YYZ
1 stop19h 02m
Multiple Airlines
Thu 21/57:00 a.m.
YYZ
-
SAN
1 stop10h 10m
Multiple Airlines
Deal found 11/3C$ 445
Wed 1/42:49 p.m.
SAN
-
YYZ
2 stops36h 54m
Multiple Airlines
Mon 13/48:00 p.m.
YYZ
-
SAN
1 stop20h 17m
Multiple Airlines
Deal found 10/3C$ 446
Mon 6/48:54 p.m.
SAN
-
YYZ
2 stops19h 42m
Multiple Airlines
Sun 19/48:00 p.m.
YYZ
-
SAN
1 stop24h 56m
Multiple Airlines
Deal found 10/3C$ 449
Mon 27/410:30 p.m.
SAN
-
YUL
1 stop13h 57m
American Airlines
Mon 4/57:45 a.m.
YUL
-
SAN
1 stop18h 04m
American Airlines
Deal found 13/3C$ 462

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 15 March 2026.

Round-trip from

C$ 417

One-way from

C$ 187

Popular in

October

Cheapest in

May

Average price

C$ 556

Good round-trip deal

C$ 578 or less

Good one-way deal

C$ 376 or less
8/4-20/4
  • 8/4-20/4
  • 3 total stops
  • 43h 33m total
  • San Diego to Ontario
Search Deals
6/5
  • 6/5
  • 2 total stops
  • 32h 31m total
  • San Diego to Ontario
Search Deals
Highest demand for flights based on searches. 7% potential increase in price (C$ 69 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (C$ 29 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 629,999 searches. Data last updated 15 March 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 DiegoToronto

SAN - YYZ

SANYYZ

San Diego

Fri 1/5

5:17 p.m.-3:45 p.m.

2 stops19h 28m

Toronto Pearson Intl

Thu 7/5

4:55 p.m.-8:39 a.m.

2 stops18h 44m

C$ 525

San DiegoToronto

SAN - YTZ

SANYTZ

San Diego

Tue 5/5

7:00 a.m.-7:52 p.m.

1 stop9h 52m

Toronto Island

Fri 8/5

12:30 p.m.-8:43 p.m.

1 stop11h 13m

C$ 535

San DiegoLondon

SAN - YXU

SANYXU

San Diego

Fri 1/5

3:30 p.m.-5:20 a.m.

1 stop10h 50m

London

Mon 4/5

6:10 a.m.-2:10 p.m.

1 stop11h 00m

C$ 567

San DiegoToronto

SAN - YYZ

SANYYZ

San Diego

Sat 25/4

7:35 p.m.-3:45 p.m.

1 stop17h 10m

Toronto Pearson Intl

Sun 3/5

4:55 p.m.-11:59 p.m.

1 stop10h 04m

C$ 579

San DiegoToronto

SAN - YKF

SANYKF

San Diego

Fri 5/6

3:30 p.m.-7:50 p.m.

1 stop25h 20m

Toronto Region of Waterloo Intl

Mon 8/6

8:40 p.m.-2:10 p.m.

1 stop20h 30m

C$ 579

San DiegoLondon

SAN - YXU

SANYXU

San Diego

Fri 1/5

4:55 p.m.-11:43 a.m.

2 stops15h 48m

London

Mon 4/5

5:40 a.m.-12:18 p.m.

1 stop9h 38m

C$ 582

San DiegoToronto

SAN - YYZ

SANYYZ

San Diego

Tue 14/4

10:30 p.m.-10:19 a.m.

1 stop8h 49m

Toronto Pearson Intl

Thu 16/4

6:11 p.m.-11:06 p.m.

1 stop7h 55m

C$ 587

San DiegoToronto

SAN - YYZ

SANYYZ

San Diego

Wed 15/4

10:30 p.m.-12:19 p.m.

1 stop10h 49m

Toronto Pearson Intl

Sun 26/4

2:15 p.m.-11:06 p.m.

1 stop11h 51m

C$ 587

San DiegoMontreal

SAN - YUL

SANYUL

San Diego

Mon 6/4

9:55 p.m.-11:37 a.m.

1 stop10h 42m

Montreal Pierre Elliott Trudeau Intl

Wed 8/4

12:42 p.m.-11:09 p.m.

1 stop13h 27m

C$ 589
Quickest round-trip

San DiegoMontreal

SAN - YUL

SANYUL

San Diego

Fri 15/5

1:15 p.m.-12:31 a.m.

1 stop8h 16m

Montreal Pierre Elliott Trudeau Intl

Sun 17/5

5:45 p.m.-8:43 p.m.

Nonstop5h 58m

C$ 590

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/3

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 C$ 107). Flying from San Diego to Region of Ontario in September is currently the most expensive (average of C$ 347). 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 15 March 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 15 March 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 15 March 2026.
Read reviews from past customers who have flown Porter Airlines,United Airlines, andAir Canada from San Diego to Ontario. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Porter Airlines
8.0
Very good
423 reviews
Check prices

Overall

8.0

Boarding

8.2

Comfort

8.0

Crew

8.6

Entertainment

7.0

Food

7.6

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
Check prices

Overall

8.0

Boarding

8.2

Comfort

8.0

Crew

8.6

Entertainment

7.0

Food

7.6

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
9,428 reviews
Porter Airlines
8.0
Very good
423 reviews
Check prices

Overall

8.0

Boarding

8.2

Comfort

8.0

Crew

8.6

Entertainment

7.0

Food

7.6

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
10,801 reviews
Porter Airlines
8.0
Very good
423 reviews
Check prices

Overall

8.0

Boarding

8.2

Comfort

8.0

Crew

8.6

Entertainment

7.0

Food

7.6

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?

    Most people fly from San Diego (SAN) if they book a flight from San Diego to Ontario. San Diego is conveniently located just 4.2 km from San Diego’s city centre.

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

    Alaska Airlines, Air Canada, and WestJet can get you from San Diego to Region of Ontario in just under 9h 52m. Your travel time can differ by up to 9h 36m. San Diego and Region of Ontario are separated by a distance of 3481 km. Both multi-stop and direct 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?

    To fly one-way, consider booking your trip with Porter Airlines, which is currently one of the cheapest options available, starting at C$ 155. United Airlines flights start at C$ 180 while deals on Delta start at C$ 180 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?

    While on average a flight from San Diego to Region of Ontario is generally C$ 418, our data shows the cheapest flight currently is C$ 182. When looking at the most popular route, (San Diego - Toronto Pearson Intl), you can expect to pay C$ 449 for that flight.

  • 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 C$ 107). Flying from San Diego to Region of Ontario in September is currently the most expensive (average of C$ 347). 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 3 airlines flying from San Diego to Ontario

Discover the top 3 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 629,999 searches. Data last updated 15 March 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapestC$ 218AverageC$ 480FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Porter AirlinesCheapestC$ 237AverageC$ 416FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
Air CanadaCheapestC$ 418AverageC$ 686FlexibilityNo cancel feeOn-time67%
Search Air Canada flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from San Diego to Ontario?

Cheapflights makes it easy to find San Diego to Ontario flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

Why should you use Cheapflights to find cheap flight tickets from San Diego to Ontario?

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Ontario from San Diego.

Can Cheapflights find flights from San Diego to Ontario with no change fees?

Yes, we can. To see specific flights from San Diego to Ontario with no change fees, users can toggle flexible booking options after using the search form above to find flights.

Can Cheapflights notify me if prices for flights from San Diego to Ontario become cheaper?

Not ready to book yet? You can track prices for flights from San Diego to Ontario on Cheapflights with our Price Alert feature and get notified when better prices are available.

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