$155+ Cheap flights from Ontario to San Diego (SAN)
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/6. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — SAN
Oct 10 — Oct 171
Round-trip
1 adult, Economy
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Find cheap flights from Ontario to San Diego with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
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Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Ontario to San Diego
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Cheapest flights from Ontario to San DiegoExplore 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 September 10, 2026.
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 September 10, 2026.
This Kiwi.com deal was found by Cheapflights users on 9/9. 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.
Mon 10/198:15 pm -
1 stop20h 55m
Thu 10/223:30 pm -
1 stop11h 05m
Deal found 9/9![WestJet logo]()
$269
This Kiwi.com deal was found by Cheapflights users on 9/10. 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 10/191:20 pm -
2 stops28h 09m
Fri 10/233:30 pm -
1 stop11h 05m
Deal found 9/10![Multiple Airlines logo]()
$277
This Tripair deal was found by Cheapflights users on 9/6. 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 Tripair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/102:50 pm -
1 stop8h 46m
Sat 10/174:50 pm -
1 stop10h 08m
Deal found 9/6![Air Canada logo]()
$287
This Mytrip deal was found by Cheapflights users on 9/8. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/37:20 am -
1 stop9h 50m
Tue 10/63:30 pm -
1 stop20h 50m
Deal found 9/8![WestJet logo]()
$303
This Kiwi.com deal was found by Cheapflights users on 9/10. 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 10/198:15 pm -
1 stop20h 55m
Fri 10/233:30 pm -
1 stop11h 05m
Deal found 9/10![WestJet logo]()
$309
This United Airlines deal was found by Cheapflights users on 9/7. 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.
Sat 10/36:00 am -
2 stops12h 54m
Wed 10/72:24 pm -
2 stops16h 32m
Deal found 9/7![United Airlines logo]()
$313
This FlightHub deal was found by Cheapflights users on 9/8. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/34:15 pm -
1 stop23h 25m
Mon 12/71:30 pm -
1 stop22h 00m
Deal found 9/8![WestJet logo]()
$323
This WestJet deal was found by Cheapflights users on 9/8. 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 WestJet is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/266:10 am -
1 stop10h 30m
Sat 10/312:30 pm -
1 stop31h 31m
Deal found 9/8![WestJet logo]()
$326
This United Airlines deal was found by Cheapflights users on 9/6. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/309:45 am -
1 stop9h 04m
Wed 9/306:28 pm -
1 stop10h 48m
Deal found 9/6![United Airlines logo]()
$333
This FlightHub deal was found by Cheapflights users on 9/6. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/116:45 am -
2 stops34h 25m
Sun 10/183:30 pm -
1 stop12h 35m
Deal found 9/6![WestJet logo]()
$334
This Air Canada deal was found by Cheapflights users on 9/5. 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.
Thu 10/15:45 pm -
Nonstop5h 51m
Sun 10/117:00 am -
Nonstop5h 27m
Deal found 9/5![Air Canada logo]()
$335
This United Airlines deal was found by Cheapflights users on 9/5. 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.
Fri 10/29:45 am -
1 stop15h 56m
Wed 10/146:50 pm -
2 stops15h 19m
Deal found 9/5![United Airlines logo]()
$336
Best flights from Ontario to San DiegoDiscover carefully curated flight deals from Ontario to San Diego that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 10, 2026.
Discover carefully curated flight deals from Ontario to San Diego that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 10, 2026.
This Tripair deal was found by Cheapflights users on 9/6. 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 Tripair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/102:50 pm -
1 stop8h 46m
Sat 10/174:50 pm -
1 stop10h 08m
Deal found 9/6![Air Canada logo]()
$287
This United Airlines deal was found by Cheapflights users on 9/7. 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.
Sat 10/36:25 am -
1 stop12h 24m
Wed 10/710:20 pm -
1 stop7h 51m
Deal found 9/7![United Airlines logo]()
$313
This WestJet deal was found by Cheapflights users on 9/6. 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 WestJet is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/38:40 pm -
1 stop20h 30m
Sun 10/183:30 pm -
1 stop25h 20m
Deal found 9/6![WestJet logo]()
$375
This Delta deal was found by Cheapflights users on 9/5. 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.
Sun 12/67:10 am -
1 stop8h 53m
Sat 12/1911:40 am -
1 stop8h 57m
Deal found 9/5![Delta logo]()
$418
This United deal was found by Cheapflights users on 9/5. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/96:35 pm -
1 stop8h 56m
Mon 10/127:00 am -
Nonstop5h 27m
Deal found 9/5![Multiple Airlines logo]()
$436
This Alaska Airlines deal was found by Cheapflights users on 9/10. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/55:15 pm -
2 stops17h 47m
Mon 11/96:39 pm -
2 stops18h 26m
Deal found 9/10![Alaska Airlines logo]()
$559
This United Airlines deal was found by Cheapflights users on 9/8. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/36:25 am -
2 stops9h 30m
Tue 10/66:15 am -
2 stops12h 20m
Deal found 9/8![United Airlines logo]()
$313
This United Airlines deal was found by Cheapflights users on 9/9. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/246:00 am -
2 stops10h 44m
Fri 10/309:45 pm -
1 stop14h 22m
Deal found 9/9![United Airlines logo]()
$314
This Air Canada deal was found by Cheapflights users on 9/5. 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.
Mon 11/235:30 am -
2 stops12h 42m
Thu 11/2610:30 pm -
2 stops13h 17m
Deal found 9/5![Air Canada logo]()
$378
This United Airlines deal was found by Cheapflights users on 9/10. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/196:01 pm -
1 stop18h 48m
Fri 10/233:56 pm -
3 stops19h 13m
Deal found 9/10![United Airlines logo]()
$314
This Trip.com deal was found by Cheapflights users on 9/6. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 1/243:25 pm -
1 stop24h 15m
Sat 2/131:30 pm -
1 stop21h 55m
Deal found 9/6![WestJet logo]()
$428
This Delta deal was found by Cheapflights users on 9/6. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 1/114:55 pm -
1 stop7h 57m
Sat 1/1610:40 pm -
1 stop11h 59m
Deal found 9/6![Delta logo]()
$430
This Mytrip deal was found by Cheapflights users on 9/6. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/156:10 pm -
1 stop23h 00m
Sun 10/183:30 pm -
2 stops20h 35m
Deal found 9/6![Multiple Airlines logo]()
$448
This Air Canada deal was found by Cheapflights users on 9/5. 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.
Fri 11/279:20 am -
Nonstop5h 40m
Thu 12/1012:55 pm -
Nonstop5h 00m
Deal found 9/5![Air Canada logo]()
$409
This United Airlines deal was found by Cheapflights users on 9/6. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/309:45 am -
2 stops10h 41m
Wed 9/307:41 pm -
1 stop9h 35m
Deal found 9/6![United Airlines logo]()
$343
This FlightHub deal was found by Cheapflights users on 9/5. 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.
Thu 2/43:25 pm -
1 stop24h 15m
Sat 2/131:30 pm -
1 stop21h 55m
Deal found 9/5![WestJet logo]()
$429
This Mytrip deal was found by Cheapflights users on 9/8. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/26:10 pm -
1 stop23h 00m
Tue 10/63:30 pm -
2 stops20h 35m
Deal found 9/8![Multiple Airlines logo]()
$451
This United Airlines deal was found by Cheapflights users on 9/5. 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.
Mon 11/95:50 pm -
1 stop18h 20m
Mon 11/167:41 pm -
2 stops18h 26m
Deal found 9/5![United Airlines logo]()
$380
This United deal was found by Cheapflights users on 9/6. 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 United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/86:10 am -
1 stop18h 16m
Thu 11/125:15 pm -
1 stop10h 37m
Deal found 9/6![Multiple Airlines logo]()
$463
This Delta deal was found by Cheapflights users on 9/6. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/252:26 pm -
1 stop10h 46m
Thu 10/296:15 am -
1 stop7h 29m
Deal found 9/6![Delta logo]()
$516
This Air Canada deal was found by Cheapflights users on 9/5. 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.
Tue 9/226:50 am -
2 stops11h 59m
Fri 9/257:41 pm -
2 stops18h 01m
Deal found 9/5![Air Canada logo]()
$477
This United Airlines deal was found by Cheapflights users on 9/7. 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.
Tue 12/159:25 am -
2 stops13h 43m
Tue 12/1510:30 pm -
1 stop15h 37m
Deal found 9/7![United Airlines logo]()
$384
This FlightHub deal was found by Cheapflights users on 9/8. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/128:40 pm -
1 stop20h 30m
Sun 10/183:30 pm -
1 stop25h 20m
Deal found 9/8![WestJet logo]()
$523
This Delta deal was found by Cheapflights users on 9/9. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/107:45 am -
1 stop11h 40m
Sun 10/189:45 pm -
1 stop11h 34m
Deal found 9/9![Delta logo]()
$552
This United Airlines deal was found by Cheapflights users on 9/6. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/235:30 am -
2 stops10h 26m
Thu 11/267:41 pm -
3 stops16h 06m
Deal found 9/6![United Airlines logo]()
$386
This Kiwi.com deal was found by Cheapflights users on 9/5. 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 12/94:35 pm -
1 stop8h 40m
Sun 12/138:00 am -
1 stop10h 06m
Deal found 9/5![Multiple Airlines logo]()
$538
This Air Canada deal was found by Cheapflights users on 9/7. 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.
Thu 11/1912:20 pm -
2 stops13h 20m
Sun 11/2210:30 pm -
1 stop15h 12m
Deal found 9/7![Air Canada logo]()
$542
This oojo deal was found by Cheapflights users on 9/10. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/286:10 pm -
1 stop23h 00m
Mon 10/53:30 pm -
1 stop22h 45m
Deal found 9/10![WestJet logo]()
$549
This United Airlines deal was found by Cheapflights users on 9/5. 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.
Thu 10/229:45 am -
2 stops15h 42m
Thu 10/296:20 am -
1 stop11h 25m
Deal found 9/5![United Airlines logo]()
$387
This Air Canada deal was found by Cheapflights users on 9/9. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/1212:20 pm -
2 stops13h 20m
Wed 11/1810:30 pm -
2 stops12h 51m
Deal found 9/9![Air Canada logo]()
$542
Last-minute flights from Ontario to San DiegoDiscover last-minute flight deals from Ontario to San Diego. Data last updated September 10, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to San Diego. Data last updated September 10, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 9/6. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/309:45 am -
1 stop9h 04m
Wed 9/306:28 pm -
1 stop10h 48m
Deal found 9/6![United Airlines logo]()
$333
This Air Canada deal was found by Cheapflights users on 9/5. 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.
Thu 10/15:45 pm -
Nonstop5h 51m
Sun 10/117:00 am -
Nonstop5h 27m
Deal found 9/5![Air Canada logo]()
$335
This United Airlines deal was found by Cheapflights users on 9/5. 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.
Fri 10/29:45 am -
1 stop15h 56m
Wed 10/146:50 pm -
2 stops15h 19m
Deal found 9/5![United Airlines logo]()
$336
This Mytrip deal was found by Cheapflights users on 9/8. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/37:20 am -
1 stop9h 50m
Tue 10/63:30 pm -
1 stop20h 50m
Deal found 9/8![WestJet logo]()
$303
This United Airlines deal was found by Cheapflights users on 9/7. 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.
Sat 10/36:00 am -
2 stops12h 54m
Wed 10/72:24 pm -
2 stops16h 32m
Deal found 9/7![United Airlines logo]()
$313
This Tripair deal was found by Cheapflights users on 9/6. 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 Tripair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/102:50 pm -
1 stop8h 46m
Sat 10/174:50 pm -
1 stop10h 08m
Deal found 9/6![Air Canada logo]()
$287
This FlightHub deal was found by Cheapflights users on 9/6. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/116:45 am -
2 stops34h 25m
Sun 10/183:30 pm -
1 stop12h 35m
Deal found 9/6![WestJet logo]()
$334
This Kiwi.com deal was found by Cheapflights users on 9/9. 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.
Mon 10/198:15 pm -
1 stop20h 55m
Thu 10/223:30 pm -
1 stop11h 05m
Deal found 9/9![WestJet logo]()
$269
This Kiwi.com deal was found by Cheapflights users on 9/10. 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 10/191:20 pm -
2 stops28h 09m
Fri 10/233:30 pm -
1 stop11h 05m
Deal found 9/10![Multiple Airlines logo]()
$277
This Kiwi.com deal was found by Cheapflights users on 9/10. 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 10/198:15 pm -
1 stop20h 55m
Fri 10/233:30 pm -
1 stop11h 05m
Deal found 9/10![WestJet logo]()
$309
This Expedia deal was found by Cheapflights users on 9/8. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/237:20 am -
1 stop9h 50m
Fri 10/302:30 pm -
1 stop31h 30m
Deal found 9/8![WestJet logo]()
$337
This WestJet deal was found by Cheapflights users on 9/8. 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 WestJet is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/266:10 am -
1 stop10h 30m
Sat 10/312:30 pm -
1 stop31h 31m
Deal found 9/8![WestJet logo]()
$326
One-way flights from Ontario to San DiegoSearch for one-way flight options from Ontario to San Diego. Find affordable one-way fares based on user searches. Data last updated September 10, 2026.
Search for one-way flight options from Ontario to San Diego. Find affordable one-way fares based on user searches. Data last updated September 10, 2026.
This Air Canada deal was found by Cheapflights users on 9/10. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/67:30 am -
1 stop11h 42m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![Air Canada logo]()
$155
This Kiwi.com deal was found by Cheapflights users on 9/6. 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.
Sat 10/37:20 am -
1 stop9h 50m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/6![WestJet logo]()
$160
This Trip.com deal was found by Cheapflights users on 9/6. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/237:15 am -
1 stop9h 55m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/6![WestJet logo]()
$161
This Air Canada deal was found by Cheapflights users on 9/8. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/25:45 pm -
Nonstop5h 51m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/8![Air Canada logo]()
$162
This Trip.com deal was found by Cheapflights users on 9/8. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/27:15 am -
1 stop9h 55m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/8![WestJet logo]()
$163
This oojo deal was found by Cheapflights users on 9/9. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/297:15 am -
1 stop9h 55m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/9![WestJet logo]()
$164
This Air Canada deal was found by Cheapflights users on 9/7. 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.
Fri 10/237:30 am -
1 stop11h 30m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/7![Air Canada logo]()
$165
This Kiwi.com deal was found by Cheapflights users on 9/9. 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.
Tue 10/67:15 am -
1 stop9h 55m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/9![WestJet logo]()
$167
This Kiwi.com deal was found by Cheapflights users on 9/10. 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 10/191:20 pm -
2 stops28h 09m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![Multiple Airlines logo]()
$167
This Air Canada deal was found by Cheapflights users on 9/6. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/247:30 am -
1 stop11h 30m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/6![Air Canada logo]()
$169
This FlightHub deal was found by Cheapflights users on 9/6. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/167:20 am -
1 stop9h 50m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/6![WestJet logo]()
$169
This Trip.com deal was found by Cheapflights users on 9/6. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/307:15 am -
1 stop9h 55m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/6![WestJet logo]()
$170
Find 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 September 10, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $269 (Kiwi.com) |
One-way from | $155 (Air Canada) |
Popular in | August |
Cheapest in | April |
Average price | $567 |
Good round-trip deal | $522 or less |
Good one-way deal | $333 or less |
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 7,457,451 searches. Data last updated September 10, 2026.
Use the filters below to find and compare flights from Ontario to San Diego that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
OttawaSan Diego
YOW Ottawa - SAN San Diego
YOWSAN
Ottawa
Wed 9/16
7:20 am-2:10 pm
1 stop9h 50m
San Diego
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$169
MontrealSan Diego
YUL Montreal Pierre Elliott Trudeau Intl - SAN San Diego
YULSAN
Montreal Pierre Elliott Trudeau Intl
Sat 11/7
7:00 am-8:36 pm
2 stops16h 36m
San Diego
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$182
MontrealSan Diego
YUL Montreal Pierre Elliott Trudeau Intl - SAN San Diego
YULSAN
Montreal Pierre Elliott Trudeau Intl
Tue 9/29
6:00 am-12:22 pm
1 stop9h 22m
San Diego
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$185
MontrealSan Diego
YUL Montreal Pierre Elliott Trudeau Intl - SAN San Diego
YULSAN
Montreal Pierre Elliott Trudeau Intl
Fri 10/30
7:00 am-8:36 pm
2 stops16h 36m
San Diego
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$185
MontrealSan Diego
YUL Montreal Pierre Elliott Trudeau Intl - SAN San Diego
YULSAN
Montreal Pierre Elliott Trudeau Intl
Fri 10/23
9:45 am-10:57 pm
2 stops16h 12m
San Diego
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$185
MontrealSan Diego
YUL Montreal Pierre Elliott Trudeau Intl - SAN San Diego
YULSAN
Montreal Pierre Elliott Trudeau Intl
Sat 10/31
7:00 am-9:26 pm
2 stops17h 26m
San Diego
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$185
MontrealSan Diego
YUL Montreal Pierre Elliott Trudeau Intl - SAN San Diego
YULSAN
Montreal Pierre Elliott Trudeau Intl
Wed 10/28
7:00 am-8:36 pm
2 stops16h 36m
San Diego
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$185
OttawaSan Diego
YOW Ottawa - SAN San Diego
YOWSAN
Ottawa
Sat 10/24
6:00 am-8:45 pm
2 stops17h 45m
San Diego
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$186
OttawaSan Diego
YOW Ottawa - SAN San Diego
YOWSAN
Ottawa
Mon 10/19
6:01 pm-9:49 am
1 stop18h 48m
San Diego
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$186
OttawaSan Diego
YOW Ottawa - SAN San Diego
YOWSAN
Ottawa
Fri 10/30
6:00 am-9:22 pm
1 stop18h 22m
San Diego
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$186
Showing 1-10 of 60 resultsSorted by cheapest first
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.
YOW-SAN
YKF-SAN
YUL-SAN
YYZ-SAN
YXU-SAN
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
CAON-SAN
YOW-SAN
YKF-SAN
YUL-SAN
YYZ-SAN
What is the cheapest month to book a flight from Region of Ontario to San Diego?
Currently, May is the cheapest month in which you can book a flight from Region of Ontario to San Diego (average of $424). Flying from Region of Ontario to San Diego in August is currently the most expensive (average of $555). 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 September 10, 2026.
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.
Weekly flight availability from Region of Ontario to San Diego
Explore weekly flight availability from Ontario to San Diego. 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 September 10, 2026.
The most flights from CAON to SAN 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).
How much does it cost to fly round-trip from Region of Ontario to San Diego?
Airfare is below average for this route at the moment.
Region of Ontario to San Diego flights typically cost between $446 and $623 in October.The cheapest round-trip price found within the last 5 days was $374 on WestJet (Oct 15-Oct 19).
How far ahead should I book a flight from Region of Ontario to San Diego?
Booking 86 days in advance of your planned departure date is, on average, the best time to get cheap flights from Region of Ontario to San Diego. The general trend is that the closer you book to the departure date, the more expensive your flight will be.
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.
Traveling to a place near San Diego?
Book flights to San Diego if you plan to visit one of these locationsEl Cajon
National City
Chula Vista
Coronado
Poway
San Ysidro
La Mesa
Santee
Julian
Lemon Grove
Browse thousands of different options on Cheapflights for your next trip
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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.
Complete your trip
Complete your trip to San Diego by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Ontario to San Diego by cabin class
Find flights from Ontario to San Diego, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Ontario and San Diego flights
Browse other Ontario and San Diego flight options. Last updated on September 10, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Other flights to San Diego
Explore flights to San Diego departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on September 10, 2026.
Ontario to San Diego flights
Consider these flights traveling from Ontario to San Diego.
Top 4 airlines flying from Ontario to San Diego
Discover the top 4 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 7,457,451 searches. Data last updated September 10, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$275 | Average$553 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$323 | Average$455 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$333 | Average$459 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$362 | Average$539 | FlexibilityNo cancel fee | On-time69% |