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San Diego

$150+ Cheap flights from Ontario to San Diego (SAN)

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 9/4. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — SAN
ago. 3 — ago. 101
dom. 8/3
dom. 8/10
1 adult, Economy
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Cheap flight deals from Ontario to San Diego

Keep the following information in mind while searching for Ontario to San Diego flight deals. Data was last updated julio 29, 2025.

Round-trip from

$269
(Air Canada)

One-way from

$150
(Air Canada)

Popular in

September

Cheapest in

April

Average price

$428

Good round-trip deal

$423 or less

Good one-way deal

$246 or less
From Ontario to San Diego
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One-way flight from Ontario to San Diego
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Highest demand for flights based on searches. 15% potential increase in price ($67 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($8 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 Ontario to San Diego.
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Price to beat on a one-way flight from Ontario to San Diego.
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Find flight deals from Ontario to San Diego

Cheapest flights from Ontario to San Diego
Explore the most affordable flight options available from Ontario to San Diego. Find the lowest fares from popular airlines and budget airlines, with prices last updated on julio 29, 2025.

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.
jue. 9/44:45 pmYUL - SAN
Nonstop5h 50mAir Canada
sáb. 9/1312:25 pmSAN - YUL
1 stop9h 15mAir Canada
Deal found 7/27$269
This KAYAK 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 8/256:00 amYKF - SAN
1 stop10h 20mWestJet
jue. 8/2811:15 amSAN - YKF
1 stop10h 31mWestJet
Deal found 7/28$284
This Kiwi.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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 9/99:30 amYYZ - SAN
1 stop12h 12mMultiple Airlines
mar. 9/237:47 pmSAN - YYZ
1 stop20h 58mMultiple Airlines
Deal found 7/28$285
This lol.travel 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 lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 9/46:15 amYUL - SAN
2 stops11h 48mUnited Airlines
sáb. 9/137:21 pmSAN - YUL
1 stop9h 55mUnited Airlines
Deal found 7/27$286
This Air Canada 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 9/69:20 amYYZ - SAN
Nonstop5h 11mAir Canada
lun. 9/812:25 pmSAN - YYZ
Nonstop4h 55mAir Canada
Deal found 7/26$291
This Trip.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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 8/226:00 amYHM - SAN
1 stop10h 20mWestJet
dom. 8/2411:15 amSAN - YHM
1 stop10h 26mWestJet
Deal found 7/27$296
This Trip.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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 8/216:30 amYYZ - SAN
1 stop9h 50mWestJet
lun. 8/251:00 pmSAN - YYZ
1 stop21h 39mWestJet
Deal found 7/27$296
This FlightHub 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 8/217:00 amYUL - SAN
1 stop9h 20mWestJet
jue. 8/2811:15 amSAN - YUL
1 stop10h 28mWestJet
Deal found 7/28$302
This American 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 9/412:30 pmYUL - SAN
2 stops13h 06mAmerican Airlines
sáb. 9/136:20 amSAN - YUL
2 stops13h 12mAmerican Airlines
Deal found 7/27$306
This Air Canada 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 10/242:40 pmYOW - SAN
1 stop7h 55mAir Canada
lun. 11/36:10 pmSAN - YOW
1 stop10h 03mAir Canada
Deal found 7/27$307
This Trip.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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 9/106:00 amYOW - SAN
1 stop10h 20mWestJet
mié. 9/172:05 pmSAN - YOW
1 stop13h 40mWestJet
Deal found 7/27$310
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 11/113:30 pmYYZ - SAN
2 stops11h 14mUnited Airlines
dom. 11/237:50 pmSAN - YYZ
2 stops15h 30mUnited Airlines
Deal found 7/26$315

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to San Diego 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 Ontario to San Diego that are best for you.

Fly from

Ontario

Fly to

San Diego

Route

Depart

Return

Price

MontrealSan Diego

YUL - SAN

YULSAN

Montreal Pierre Elliott Trudeau Intl

jue. 9/11

5:00 am-11:31 am

1 stop9h 31m

San Diego

mar. 9/16

12:25 pm-12:40 am

1 stop9h 15m

$269

TorontoSan Diego

YKF - SAN

YKFSAN

Toronto Region of Waterloo Intl

lun. 8/25

6:00 am-1:20 pm

1 stop10h 20m

San Diego

jue. 8/28

11:15 am-12:46 am

1 stop10h 31m

$284

TorontoSan Diego

YYZ - SAN

YYZSAN

Toronto Pearson Intl

mar. 9/9

9:30 am-6:42 pm

1 stop12h 12m

San Diego

mar. 9/23

7:47 pm-7:45 pm

1 stop20h 58m

$285

MontrealSan Diego

YUL - SAN

YULSAN

Montreal Pierre Elliott Trudeau Intl

jue. 9/4

6:15 am-3:03 pm

2 stops11h 48m

San Diego

sáb. 9/13

7:21 pm-8:16 am

1 stop9h 55m

$286

TorontoSan Diego

YYZ - SAN

YYZSAN

Toronto Pearson Intl

sáb. 9/6

9:20 am-11:31 am

Nonstop5h 11m

San Diego

lun. 9/8

12:25 pm-8:20 pm

Nonstop4h 55m

$291

HamiltonSan Diego

YHM - SAN

YHMSAN

Hamilton

vie. 8/22

6:00 am-1:20 pm

1 stop10h 20m

San Diego

dom. 8/24

11:15 am-12:41 am

1 stop10h 26m

$296

TorontoSan Diego

YYZ - SAN

YYZSAN

Toronto Pearson Intl

jue. 8/21

6:30 am-1:20 pm

1 stop9h 50m

San Diego

lun. 8/25

1:00 pm-1:39 pm

1 stop21h 39m

$296

MontrealSan Diego

YUL - SAN

YULSAN

Montreal Pierre Elliott Trudeau Intl

jue. 8/21

7:00 am-1:20 pm

1 stop9h 20m

San Diego

jue. 8/28

11:15 am-12:43 am

1 stop10h 28m

$302

MontrealSan Diego

YUL - SAN

YULSAN

Montreal Pierre Elliott Trudeau Intl

sáb. 8/16

7:00 am-4:16 pm

1 stop12h 16m

San Diego

sáb. 8/30

10:30 pm-1:38 pm

1 stop12h 08m

$304

MontrealSan Diego

YUL - SAN

YULSAN

Montreal Pierre Elliott Trudeau Intl

jue. 9/4

12:30 pm-10:36 pm

2 stops13h 06m

San Diego

sáb. 9/13

6:20 am-10:32 pm

2 stops13h 12m

$306

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/29

Showing 1-10 of 49 results
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Best time to book a flight from Ontario to San Diego

Have a flexible travel schedule? Discover the best time to fly to San Diego from Ontario 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 Ontario to San Diego

What is the cheapest month to book a flight from Region of Ontario to San Diego?

Currently, August is the cheapest month in which you can book a flight from Region of Ontario to San Diego (average of $286). Flying from Region of Ontario to San Diego in March is currently the most expensive (average of $366). 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 ON to SAN?

Find hourly flight availability from Ontario to San Diego. 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.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Region of Ontario to San Diego as you normally would.

Reviews of airlines servicing San Diego

Get insights into the airlines that provide service to San Diego. 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 San Diego. Reviews last updated julio 29, 2025.
Peruse reviews from past customers who have flown with Alaska Airlines, Delta, and United Airlines from Ontario to San Diego to help guide your decision. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Overall

8.0

Entertainment

7.1

Comfort

7.8

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

Boarding

8.1

Overall

8.0

Entertainment

7.1

Comfort

7.8

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
7,977 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Overall

8.0

Entertainment

7.1

Comfort

7.8

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
8,899 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Overall

8.0

Entertainment

7.1

Comfort

7.8

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

Boarding

8.1

Overall

8.0

Entertainment

7.1

Comfort

7.8

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.
WestJet
7.2
Good
2,973 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Overall

8.0

Entertainment

7.1

Comfort

7.8

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 Ontario to San Diego. 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 into for flights to San Diego from Ontario?

    Most people fly into San Diego (SAN) if they book a flight to San Diego from Ontario. San Diego is conveniently located just 2.6 mi from San Diego’s city center.

  • What are the cheapest airlines to fly from Region of Ontario to San Diego one-way?

    The cheapest airline one-way is Air Canada, with whom users have recently found tickets for as low as $150. However, be on the lookout for offers from WestJet and Delta, as they are both options that can get you from Region of Ontario to San Diego for a low price.

  • What are the most popular routes from Region of Ontario to San Diego?

    While some choose either Montreal Pierre Elliott Trudeau Intl - San Diego or Toronto Island - San Diego, Toronto Pearson Intl - San Diego is the most popular route from Region of Ontario to San Diego.

  • What are the most reliable airlines from Region of Ontario to San Diego?

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Region of Ontario to San Diego on time: Porter Airlines (92%), Air Transat (92%), Air Canada (80%).

  • What are the cheapest flights from Region of Ontario to San Diego?

    On average you can expect to pay $502 for a flight from Region of Ontario to San Diego. The cheapest flight overall is $158 while the most popular route, (Toronto Pearson Intl - San Diego) is currently priced at $244.

  • Can I find deals for flights from Ontario to San Diego that include hotel bookings?

    Yes. In addition to deals on Ontario to San Diego flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ontario to San Diego?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to San Diego.

  • Can I find deals for business class flights from Ontario to San Diego?

    Yes. Cheapflights offers flight deals from Ontario to San Diego 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 Region of Ontario to San Diego?

    Currently, August is the cheapest month in which you can book a flight from Region of Ontario to San Diego (average of $286). Flying from Region of Ontario to San Diego in March is currently the most expensive (average of $366). 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

Traveling to a place near San Diego?

Book flights to San Diego if you plan to visit one of these locations
El Cajon
Chula Vista
Coronado
Poway
National City
Lemon Grove
Imperial Beach
La Mesa
Alpine
Santee

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Alternative routes for Ontario to San Diego

See prices for flight routes from nearby airports that may be better suited for you.
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Top 5 airlines flying from Ontario to San Diego

Discover the top 5 airlines that operate flights from Ontario to San Diego. 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$116Average$282FlexibilityNo cancel feeOn-time52%
Air CanadaCheapest$186Average$502FlexibilityNo cancel feeOn-time67%
Air TransatCheapest$234Average$340FlexibilityNo cancel feeOn-time50%
United AirlinesCheapest$252Average$386FlexibilityNo cancel feeOn-time69%
DeltaCheapest$267Average$396FlexibilityNo cancel feeOn-timeN/A

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