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Cheap flights from San Diego to Ontario from C$ 140

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 2/6. Fares are subject to change and may not be available on all flights or dates of travel.
SAN — YYZ
2 Jun — 9 Jun1
1 adult

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 28 May 2025.

Round-trip from

C$ 322

One-way from

C$ 140

Popular in

October

Cheapest in

January

Average price

C$ 507

Good round-trip deal

C$ 250 or less

Good one-way deal

C$ 192 or less
18/6-25/6
  • 18/6-25/6
  • 3 total stops
  • 32h 18m total
  • San Diego to Ontario
Search Deals
Air Canada
  • Air Canada
  • 2/6
  • Nonstop
  • 5h 27m total
  • San Diego to Ontario
Search Deals
Highest demand for flights based on searches. 17% potential increase in price (C$ 156 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 19 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in May 2025
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

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 28 May 2025.

Mon 2/61:55 p.m.SAN - YUL
1 stop7h 42mPorter Airlines
Wed 11/66:45 a.m.YUL - SAN
1 stop9h 10mPorter Airlines
Deal found 27/5C$ 311
Wed 18/66:15 a.m.SAN - YYZ
2 stops20h 57mMultiple Airlines
Wed 25/69:45 a.m.YYZ - SAN
1 stop11h 21mMultiple Airlines
Deal found 27/5C$ 322
Sun 15/61:00 p.m.SAN - YYZ
2 stops14h 12mWestJet
Mon 23/66:30 a.m.YYZ - SAN
1 stop9h 50mWestJet
Deal found 27/5C$ 337
Mon 2/63:10 p.m.SAN - YUL
2 stops18h 11mAmerican Airlines
Tue 3/62:35 p.m.YUL - SAN
1 stop9h 16mAmerican Airlines
Deal found 28/5C$ 347
Fri 8/810:20 p.m.SAN - YUL
1 stop12h 38mUnited Airlines
Sat 9/84:45 p.m.YUL - SAN
Nonstop5h 53mUnited Airlines
Deal found 27/5C$ 350
Tue 22/78:10 a.m.SAN - YUL
Nonstop5h 29mAir Canada
Tue 12/84:45 p.m.YUL - SAN
Nonstop5h 53mAir Canada
Deal found 28/5C$ 351
Mon 2/61:55 p.m.SAN - YUL
1 stop7h 42mMultiple Airlines
Tue 10/63:10 p.m.YUL - SAN
2 stops19h 03mMultiple Airlines
Deal found 27/5C$ 372
Fri 8/81:00 p.m.SAN - YUL
2 stops32h 43mWestJet
Thu 14/87:00 a.m.YUL - SAN
1 stop9h 20mWestJet
Deal found 27/5C$ 377
Wed 11/68:08 a.m.SAN - YOW
1 stop8h 47mMultiple Airlines
Sat 14/63:45 p.m.YOW - SAN
2 stops18h 28mMultiple Airlines
Deal found 28/5C$ 384
Wed 11/62:05 p.m.SAN - YKF
2 stops26h 20mMultiple Airlines
Sun 15/66:00 a.m.YKF - SAN
1 stop10h 20mMultiple Airlines
Deal found 26/5C$ 407
Sat 14/610:30 p.m.SAN - YYZ
1 stop10h 19mUnited Airlines
Sat 21/69:35 a.m.YYZ - SAN
Nonstop5h 15mUnited Airlines
Deal found 27/5C$ 418
Wed 18/61:55 p.m.SAN - YYZ
Nonstop4h 50mPorter Airlines
Mon 23/610:45 a.m.YYZ - SAN
Nonstop5h 10mPorter Airlines
Deal found 27/5C$ 420

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 28 May 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

Wed 18/6

6:15 a.m.-6:12 a.m.

2 stops20h 57m

Toronto Pearson Intl

Wed 25/6

9:45 a.m.-6:06 p.m.

1 stop11h 21m

C$ 322

San DiegoToronto

SAN - YYZ

SANYYZ

San Diego

Sun 15/6

1:00 p.m.-6:12 a.m.

2 stops14h 12m

Toronto Pearson Intl

Mon 23/6

6:30 a.m.-1:20 p.m.

1 stop9h 50m

C$ 337

San DiegoMontreal

SAN - YUL

SANYUL

San Diego

Fri 8/8

10:20 p.m.-1:58 p.m.

1 stop12h 38m

Montreal Pierre Elliott Trudeau Intl

Sat 9/8

4:45 p.m.-7:38 p.m.

Nonstop5h 53m

C$ 350

San DiegoMontreal

SAN - YUL

SANYUL

San Diego

Tue 22/7

8:10 a.m.-4:39 p.m.

Nonstop5h 29m

Montreal Pierre Elliott Trudeau Intl

Tue 12/8

4:45 p.m.-7:38 p.m.

Nonstop5h 53m

C$ 351

San DiegoMontreal

SAN - YUL

SANYUL

San Diego

Fri 13/6

10:30 p.m.-5:26 p.m.

1 stop15h 56m

Montreal Pierre Elliott Trudeau Intl

Sun 15/6

4:45 p.m.-7:45 p.m.

Nonstop6h 00m

C$ 366

San DiegoMontreal

SAN - YUL

SANYUL

San Diego

Fri 8/8

1:00 p.m.-12:43 a.m.

2 stops32h 43m

Montreal Pierre Elliott Trudeau Intl

Thu 14/8

7:00 a.m.-1:20 p.m.

1 stop9h 20m

C$ 377

San DiegoOttawa

SAN - YOW

SANYOW

San Diego

Wed 11/6

8:08 a.m.-7:55 p.m.

1 stop8h 47m

Ottawa

Sat 14/6

3:45 p.m.-7:13 a.m.

2 stops18h 28m

C$ 384

San DiegoMontreal

SAN - YUL

SANYUL

San Diego

Tue 24/6

10:45 p.m.-11:30 a.m.

1 stop9h 45m

Montreal Pierre Elliott Trudeau Intl

Tue 1/7

7:50 a.m.-9:12 p.m.

1 stop16h 22m

C$ 402

San DiegoToronto

SAN - YKF

SANYKF

San Diego

Wed 11/6

2:05 p.m.-7:25 p.m.

2 stops26h 20m

Toronto Region of Waterloo Intl

Sun 15/6

6:00 a.m.-1:20 p.m.

1 stop10h 20m

C$ 407

San DiegoToronto

SAN - YYZ

SANYYZ

San Diego

Sat 14/6

10:30 p.m.-11:49 a.m.

1 stop10h 19m

Toronto Pearson Intl

Sat 21/6

9:35 a.m.-11:50 a.m.

Nonstop5h 15m

C$ 418

Flights are sorted by cheapest round-trip flights first.

Deals found on 28/5

Showing 1-10 of 44 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 C$ 167). Flying from San Diego to Region of Ontario in July is currently the most expensive (average of C$ 257). 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 28 May 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 28 May 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 51.0 - 83.0 mm per month. June is typically the wettest month, when rainfall can reach 83.0 mm. February is typically the driest time to visit Region of Ontario when rainfall is around 51.0 mm.

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 21.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around -6.0 C).

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 28 May 2025.
Read through reviews of airlines operating flights from San Diego to Ontario, such as Alaska Airlines, Porter Airlines and Delta. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews
Check prices

Overall

8.0

Boarding

8.1

Comfort

7.9

Entertainment

7.1

Crew

8.5

Food

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews
Check prices

Overall

8.0

Boarding

8.1

Comfort

7.9

Entertainment

7.1

Crew

8.5

Food

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Porter Airlines
8.0
Very good
286 reviews
Alaska Airlines
8.0
Very good
10,000 reviews
Check prices

Overall

8.0

Boarding

8.1

Comfort

7.9

Entertainment

7.1

Crew

8.5

Food

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Delta
8.0
Very good
7,957 reviews
Alaska Airlines
8.0
Very good
10,000 reviews
Check prices

Overall

8.0

Boarding

8.1

Comfort

7.9

Entertainment

7.1

Crew

8.5

Food

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
United Airlines
7.4
Good
8,756 reviews
Alaska Airlines
8.0
Very good
10,000 reviews
Check prices

Overall

8.0

Boarding

8.1

Comfort

7.9

Entertainment

7.1

Crew

8.5

Food

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews
Check prices

Overall

8.0

Boarding

8.1

Comfort

7.9

Entertainment

7.1

Crew

8.5

Food

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

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.

  • 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 Air Canada, which is currently one of the cheapest options available, starting at C$ 140. American Airlines flights start at C$ 153 while deals on WestJet start at C$ 175 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?

    Consider Porter Airlines (71%), Air Transat (71%) or Air Canada (59%) when booking your flight. These represent the most reliable airlines when flying from San Diego to Region of Ontario.

  • 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$ 374, our data shows the cheapest flight currently is C$ 154. When looking at the most popular route, (San Diego - Toronto Pearson Intl), you can expect to pay C$ 348 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, January is the cheapest month in which you can book a flight from San Diego to Region of Ontario (average of C$ 167). Flying from San Diego to Region of Ontario in July is currently the most expensive (average of C$ 257). 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 28 May 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapestC$ 254AverageC$ 474FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Porter AirlinesCheapestC$ 288AverageC$ 407FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
Air CanadaCheapestC$ 387AverageC$ 630FlexibilityNo 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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