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$136+ 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 5/30. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — SAN
may. 4 — may. 111
dom. 5/4
dom. 5/11
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 abril 29, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$249
(Kiwi.com)

One-way from

$136
(Trip.com)

Popular in

August

Cheapest in

February

Average price

$284

Good round-trip deal

$208 or less

Good one-way deal

$145 or less
Provider with most accurate pricing for Toronto (YTO)-San Diego flight deals.
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Provider most trusted by Cheapflights users for Toronto (YTO)-San Diego flights.
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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. 14% potential increase in price ($65 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($7 potential savings vs. average RT price).
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Average for round-trip flights in April 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 abril 29, 2025.

This Kiwi.com deal was found by Cheapflights users on 4/27. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 5/272:00 pmYYZ - SAN
2 stops20h 13mMultiple Airlines
mar. 6/38:48 pmSAN - YYZ
1 stop20h 11mMultiple Airlines
Deal found 4/27$244
This Booking.com deal was found by Cheapflights users on 4/28. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 7/176:00 amYKF - SAN
1 stop10h 20mWestJet
dom. 8/1711:15 amSAN - YKF
1 stop10h 31mWestJet
Deal found 4/28$255
This Air Canada deal was found by Cheapflights users on 4/28. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 5/1412:25 pmYTZ - SAN
1 stop10h 20mAir Canada
dom. 5/188:00 amSAN - YTZ
1 stop8h 50mAir Canada
Deal found 4/28$255
This Booking.com deal was found by Cheapflights users on 4/28. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 5/2810:45 amYYZ - SAN
Nonstop5h 10mPorter Airlines
mié. 6/41:55 pmSAN - YYZ
Nonstop4h 50mPorter Airlines
Deal found 4/28$260
This United Airlines deal was found by Cheapflights users on 4/27. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 5/319:30 amYYZ - SAN
Nonstop5h 23mUnited Airlines
dom. 6/110:10 pmSAN - YYZ
1 stop8h 09mUnited Airlines
Deal found 4/27$261
This Kiwi.com deal was found by Cheapflights users on 4/28. 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.
lun. 6/97:00 amYUL - SAN
1 stop9h 20mMultiple Airlines
mié. 6/181:55 pmSAN - YUL
1 stop7h 42mMultiple Airlines
Deal found 4/28$268
This Trip.com deal was found by Cheapflights users on 4/28. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 7/176:30 amYYZ - SAN
1 stop9h 50mWestJet
dom. 8/1711:15 amSAN - YYZ
1 stop8h 39mWestJet
Deal found 4/28$269
This United Airlines deal was found by Cheapflights users on 4/28. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 6/114:45 pmYUL - SAN
Nonstop6h 00mUnited Airlines
lun. 6/169:10 pmSAN - YUL
1 stop9h 13mUnited Airlines
Deal found 4/28$271
This Trip.com deal was found by Cheapflights users on 4/28. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 6/97:00 amYUL - SAN
1 stop9h 20mWestJet
lun. 6/162:05 pmSAN - YUL
2 stops31h 32mWestJet
Deal found 4/28$273
This Air Canada deal was found by Cheapflights users on 4/28. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 6/114:45 pmYUL - SAN
Nonstop6h 00mAir Canada
vie. 6/1310:30 pmSAN - YUL
2 stops15h 51mAir Canada
Deal found 4/28$278
This Booking.com deal was found by Cheapflights users on 4/28. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 5/286:00 amYKF - SAN
3 stops20h 56mMultiple Airlines
mié. 6/46:15 amSAN - YKF
2 stops15h 31mMultiple Airlines
Deal found 4/28$281
This Delta deal was found by Cheapflights users on 4/28. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 5/266:30 amYYZ - SAN
1 stop7h 00mDelta
lun. 6/210:30 pmSAN - YYZ
1 stop8h 53mDelta
Deal found 4/28$281

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 abril 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

TorontoSan Diego

YYZ - SAN

YYZSAN

Toronto Pearson Intl

mar. 5/27

2:00 pm-7:13 am

2 stops20h 13m

San Diego

mar. 6/3

8:48 pm-7:59 pm

1 stop20h 11m

$244

TorontoSan Diego

YKF - SAN

YKFSAN

Toronto Region of Waterloo Intl

jue. 7/17

6:00 am-1:20 pm

1 stop10h 20m

San Diego

dom. 8/17

11:15 am-12:46 am

1 stop10h 31m

$255

TorontoSan Diego

YTZ - SAN

YTZSAN

Toronto Island

mié. 5/14

12:25 pm-7:45 pm

1 stop10h 20m

San Diego

dom. 5/18

8:00 am-7:50 pm

1 stop8h 50m

$255

TorontoSan Diego

YYZ - SAN

YYZSAN

Toronto Pearson Intl

mié. 5/28

10:45 am-12:55 pm

Nonstop5h 10m

San Diego

mié. 6/4

1:55 pm-9:45 pm

Nonstop4h 50m

$260

TorontoSan Diego

YYZ - SAN

YYZSAN

Toronto Pearson Intl

sáb. 5/31

9:30 am-11:53 am

Nonstop5h 23m

San Diego

dom. 6/1

10:10 pm-9:19 am

1 stop8h 09m

$261

MontrealSan Diego

YUL - SAN

YULSAN

Montreal Pierre Elliott Trudeau Intl

lun. 6/9

7:00 am-1:20 pm

1 stop9h 20m

San Diego

mié. 6/18

1:55 pm-12:37 am

1 stop7h 42m

$268

TorontoSan Diego

YYZ - SAN

YYZSAN

Toronto Pearson Intl

jue. 7/17

6:30 am-1:20 pm

1 stop9h 50m

San Diego

dom. 8/17

11:15 am-10:54 pm

1 stop8h 39m

$269

MontrealSan Diego

YUL - SAN

YULSAN

Montreal Pierre Elliott Trudeau Intl

mié. 6/11

4:45 pm-7:45 pm

Nonstop6h 00m

San Diego

lun. 6/16

9:10 pm-9:23 am

1 stop9h 13m

$271

MontrealSan Diego

YUL - SAN

YULSAN

Montreal Pierre Elliott Trudeau Intl

lun. 6/9

7:00 am-1:20 pm

1 stop9h 20m

San Diego

lun. 6/16

2:05 pm-12:37 am

2 stops31h 32m

$273

MontrealSan Diego

YUL - SAN

YULSAN

Montreal Pierre Elliott Trudeau Intl

mié. 6/11

4:45 pm-7:45 pm

Nonstop6h 00m

San Diego

vie. 6/13

10:30 pm-5:21 pm

2 stops15h 51m

$278

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/27

Showing 1-10 of 54 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 abril 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.

Rainfall in San Diego by month

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

In terms of precipitation, rainfall in San Diego ranges from 0.0 - 2.3 inches per month. February is typically the wettest month, when rainfall can reach 2.3 in. July is typically the driest time to visit San Diego when rainfall is around 0.0 in.

Temperature in San Diego by month

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

If weather is an important factor for your trip to San Diego, use this chart to help with planning. For those seeking warmer temperatures, August is the ideal time of year to visit, when temperatures reach an average of 71.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 57.2 F).

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 abril 29, 2025.
See what other customers who have flown with Alaska Airlines, Porter Airlines and Delta from Ontario to San Diego have to say. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
9,961 reviews

Food

7.1

Entertainment

7.1

Boarding

8.2

Comfort

7.9

Crew

8.5

Overall

8.0

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
9,961 reviews
Alaska Airlines
8.0
Very good
9,961 reviews

Food

7.1

Entertainment

7.1

Boarding

8.2

Comfort

7.9

Crew

8.5

Overall

8.0

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
285 reviews
Alaska Airlines
8.0
Very good
9,961 reviews

Food

7.1

Entertainment

7.1

Boarding

8.2

Comfort

7.9

Crew

8.5

Overall

8.0

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
7,936 reviews
Alaska Airlines
8.0
Very good
9,961 reviews

Food

7.1

Entertainment

7.1

Boarding

8.2

Comfort

7.9

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Air Transat
7.8
Good
385 reviews
Alaska Airlines
8.0
Very good
9,961 reviews

Food

7.1

Entertainment

7.1

Boarding

8.2

Comfort

7.9

Crew

8.5

Overall

8.0

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
8,696 reviews
Alaska Airlines
8.0
Very good
9,961 reviews

Food

7.1

Entertainment

7.1

Boarding

8.2

Comfort

7.9

Crew

8.5

Overall

8.0

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 WestJet, with whom users have recently found tickets for as low as $151. However, be on the lookout for offers from Porter Airlines and Air Canada, 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 (83%), Air Transat (83%), Air Canada (65%).

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

    On average you can expect to pay $240 for a flight from Region of Ontario to San Diego. The cheapest flight overall is $143 while the most popular route, (Toronto Pearson Intl - San Diego) is currently priced at $252.

  • 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 Ontario?

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

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Alternative routes for Ontario to San Diego

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Top 6 airlines flying from Ontario to San Diego

Discover the top 6 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 abril 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
Porter AirlinesCheapest$115Average$268FlexibilityNo cancel feeOn-time52%
Air CanadaCheapest$186Average$505FlexibilityNo cancel feeOn-time67%
Air TransatCheapest$234Average$340FlexibilityNo cancel feeOn-time50%
American AirlinesCheapest$236Average$447FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$252Average$448FlexibilityNo cancel feeOn-time69%
DeltaCheapest$264Average$491FlexibilityNo cancel feeOn-timeN/A

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