$157+ 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 12/8. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — SAN
Nov 26 — Dec 31
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
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
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 October 27, 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 October 27, 2026.
This Kiwi.com deal was found by Cheapflights users on 10/21. 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.
Thu 11/129:50 am -
1 stop9h 32m
Mon 11/168:20 pm -
1 stop7h 31m
Deal found 10/21![Multiple Airlines logo]()
$396
This Kiwi.com deal was found by Cheapflights users on 10/21. 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.
Sun 12/68:30 pm -
1 stop14h 32m
Sun 12/137:46 am -
1 stop11h 05m
Deal found 10/21![Multiple Airlines logo]()
$400
This Kiwi.com deal was found by Cheapflights users on 10/22. 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.
Fri 11/139:50 am -
1 stop9h 32m
Mon 11/168:20 pm -
1 stop7h 31m
Deal found 10/22![Multiple Airlines logo]()
$404
This Kiwi.com deal was found by Cheapflights users on 10/21. 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.
Thu 11/199:50 am -
2 stops17h 07m
Mon 11/238:11 pm -
1 stop22h 32m
Deal found 10/21![Multiple Airlines logo]()
$405
This Mytrip deal was found by Cheapflights users on 10/21. 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.
Tue 11/249:50 am -
1 stop12h 21m
Tue 12/112:32 pm -
3 stops31h 23m
Deal found 10/21![Multiple Airlines logo]()
$408
This Air Canada deal was found by Cheapflights users on 10/25. 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 12/37:45 am -
1 stop11h 25m
Wed 12/912:55 pm -
1 stop8h 00m
Deal found 10/25![Air Canada logo]()
$410
This Kiwi.com deal was found by Cheapflights users on 10/23. 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 11/109:50 am -
1 stop9h 32m
Mon 11/168:20 pm -
1 stop7h 31m
Deal found 10/23![Multiple Airlines logo]()
$410
This Kiwi.com deal was found by Cheapflights users on 10/22. 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.
Thu 11/199:50 am -
1 stop11h 48m
Thu 11/2611:26 am -
1 stop7h 25m
Deal found 10/22![Multiple Airlines logo]()
$412
This Orbitz deal was found by Cheapflights users on 10/22. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/135:15 pm -
2 stops18h 27m
Mon 11/166:35 pm -
2 stops18h 30m
Deal found 10/22![Alaska Airlines logo]()
$414
This Mytrip deal was found by Cheapflights users on 10/25. 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.
Mon 12/74:15 pm -
3 stops21h 04m
Mon 12/1411:14 am -
2 stops24h 46m
Deal found 10/25![Multiple Airlines logo]()
$433
This Air Canada deal was found by Cheapflights users on 10/22. 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 12/78:25 pm -
1 stop18h 35m
Mon 12/1412:55 pm -
1 stop9h 45m
Deal found 10/22![Air Canada logo]()
$436
This Kiwi.com deal was found by Cheapflights users on 10/25. 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 12/912:15 pm -
2 stops12h 40m
Wed 12/168:33 am -
1 stop10h 12m
Deal found 10/25![Multiple Airlines logo]()
$438
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 October 27, 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 October 27, 2026.
This Alaska Airlines deal was found by Cheapflights users on 10/21. 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 11/125:15 pm -
2 stops21h 28m
Mon 11/166:35 pm -
2 stops18h 30m
Deal found 10/21![Alaska Airlines logo]()
$415
This Air Canada deal was found by Cheapflights users on 10/21. 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 1/128:00 am -
1 stop10h 55m
Thu 1/214:45 pm -
1 stop11h 07m
Deal found 10/21![Air Canada logo]()
$430
This United Airlines deal was found by Cheapflights users on 10/26. 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.
Thu 12/36:15 am -
2 stops14h 22m
Mon 12/72:30 pm -
2 stops21h 37m
Deal found 10/26![United Airlines logo]()
$445
This Kiwi.com deal was found by Cheapflights users on 10/26. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/32:20 pm -
1 stop10h 35m
Mon 12/77:00 am -
1 stop11h 05m
Deal found 10/26![Multiple Airlines logo]()
$482
This Delta deal was found by Cheapflights users on 10/24. 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.
Thu 2/46:30 am -
2 stops11h 09m
Sat 2/136:15 am -
1 stop6h 49m
Deal found 10/24![Delta logo]()
$537
This United Airlines deal was found by Cheapflights users on 10/26. 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.
Wed 12/99:45 am -
2 stops11h 27m
Fri 12/119:45 pm -
1 stop14h 22m
Deal found 10/26![United Airlines logo]()
$445
This Kiwi.com deal was found by Cheapflights users on 10/26. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/34:35 pm -
1 stop9h 14m
Sun 12/67:00 am -
1 stop11h 05m
Deal found 10/26![Multiple Airlines logo]()
$495
This United Airlines deal was found by Cheapflights users on 10/25. 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 12/36:15 am -
2 stops14h 22m
Wed 12/96:45 am -
2 stops11h 31m
Deal found 10/25![United Airlines logo]()
$479
This Kiwi.com deal was found by Cheapflights users on 10/23. 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.
Thu 1/282:20 pm -
1 stop10h 38m
Thu 2/48:37 pm -
2 stops15h 29m
Deal found 10/23![Multiple Airlines logo]()
$504
This Air Canada deal was found by Cheapflights users on 10/21. 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 12/59:20 am -
Nonstop5h 40m
Sat 12/1212:55 pm -
Nonstop5h 00m
Deal found 10/21![Air Canada logo]()
$566
This Alaska Airlines deal was found by Cheapflights users on 10/24. 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.
Sat 11/75:15 pm -
1 stop19h 58m
Sat 11/144:25 pm -
2 stops20h 40m
Deal found 10/24![Alaska Airlines logo]()
$569
This United Airlines deal was found by Cheapflights users on 10/26. 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.
Tue 3/96:00 am -
1 stop9h 38m
Mon 3/155:00 pm -
2 stops18h 18m
Deal found 10/26![United Airlines logo]()
$493
This Alaska Airlines deal was found by Cheapflights users on 10/23. 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.
Sat 11/145:15 pm -
2 stops22h 39m
Sat 11/215:04 pm -
2 stops20h 01m
Deal found 10/23![Alaska Airlines logo]()
$579
This Mytrip deal was found by Cheapflights users on 10/23. 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.
Tue 11/109:10 am -
3 stops17h 47m
Wed 11/116:25 am -
3 stops27h 25m
Deal found 10/23![Multiple Airlines logo]()
$539
This United Airlines deal was found by Cheapflights users on 10/26. 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.
Thu 1/74:36 pm -
1 stop9h 01m
Sat 1/168:00 am -
1 stop8h 27m
Deal found 10/26![United Airlines logo]()
$493
This United Airlines deal was found by Cheapflights users on 10/26. 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.
Thu 12/316:15 am -
1 stop8h 21m
Mon 1/118:40 am -
2 stops9h 43m
Deal found 10/26![United Airlines logo]()
$496
This United deal was found by Cheapflights users on 10/26. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/245:30 pm -
1 stop7h 27m
Mon 5/311:25 am -
Nonstop4h 56m
Deal found 10/26![Multiple Airlines logo]()
$550
This United Airlines deal was found by Cheapflights users on 10/26. 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.
Sat 11/148:35 am -
1 stop13h 04m
Sat 11/2110:30 pm -
1 stop8h 17m
Deal found 10/26![United Airlines logo]()
$501
This FlightHub deal was found by Cheapflights users on 10/26. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/48:10 pm -
1 stop27h 03m
Sat 2/138:59 pm -
1 stop21h 47m
Deal found 10/26![Multiple Airlines logo]()
$555
This United Airlines deal was found by Cheapflights users on 10/23. 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 12/73:20 pm -
2 stops20h 20m
Thu 12/101:30 pm -
2 stops17h 37m
Deal found 10/23![United Airlines logo]()
$511
This Kiwi.com deal was found by Cheapflights users on 10/26. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/114:35 pm -
1 stop9h 14m
Fri 12/187:00 am -
1 stop11h 05m
Deal found 10/26![Multiple Airlines logo]()
$579
This United Airlines deal was found by Cheapflights users on 10/21. 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 2/46:45 am -
2 stops9h 29m
Sat 2/1312:45 pm -
2 stops8h 28m
Deal found 10/21![United Airlines logo]()
$517
This Kiwi.com deal was found by Cheapflights users on 10/22. 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 11/94:35 pm -
1 stop9h 08m
Sat 11/147:02 am -
1 stop11h 03m
Deal found 10/22![Multiple Airlines logo]()
$591
This United Airlines deal was found by Cheapflights users on 10/25. 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 2/264:36 pm -
2 stops21h 32m
Tue 3/911:20 am -
2 stops23h 58m
Deal found 10/25![United Airlines logo]()
$534
This United Airlines deal was found by Cheapflights users on 10/24. 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.
Sun 12/136:15 am -
2 stops11h 40m
Sat 1/98:40 am -
2 stops9h 43m
Deal found 10/24![United Airlines logo]()
$572
This United Airlines deal was found by Cheapflights users on 10/26. 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.
Tue 12/2212:10 pm -
2 stops13h 22m
Mon 1/42:45 pm -
2 stops20h 24m
Deal found 10/26![United Airlines logo]()
$578
Last-minute flights from Ontario to San DiegoDiscover last-minute flight deals from Ontario to San Diego. Data last updated October 27, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to San Diego. Data last updated October 27, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 10/26. 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.
Mon 11/94:46 pm -
2 stops23h 38m
Wed 11/1110:20 pm -
1 stop11h 51m
Deal found 10/26![United Airlines logo]()
$445
This Kiwi.com deal was found by Cheapflights users on 10/23. 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 11/109:50 am -
1 stop9h 32m
Mon 11/168:20 pm -
1 stop7h 31m
Deal found 10/23![Multiple Airlines logo]()
$410
This Kiwi.com deal was found by Cheapflights users on 10/21. 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.
Thu 11/129:50 am -
1 stop9h 32m
Mon 11/168:20 pm -
1 stop7h 31m
Deal found 10/21![Multiple Airlines logo]()
$396
This Alaska Airlines deal was found by Cheapflights users on 10/21. 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 11/125:15 pm -
2 stops21h 28m
Mon 11/166:35 pm -
2 stops18h 30m
Deal found 10/21![Alaska Airlines logo]()
$415
This Kiwi.com deal was found by Cheapflights users on 10/22. 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.
Fri 11/139:50 am -
1 stop9h 32m
Mon 11/168:20 pm -
1 stop7h 31m
Deal found 10/22![Multiple Airlines logo]()
$404
This Orbitz deal was found by Cheapflights users on 10/22. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/135:15 pm -
2 stops18h 27m
Mon 11/166:35 pm -
2 stops18h 30m
Deal found 10/22![Alaska Airlines logo]()
$414
This Kiwi.com deal was found by Cheapflights users on 10/24. 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 11/1810:30 am -
1 stop9h 26m
Tue 11/247:00 am -
1 stop11h 05m
Deal found 10/24![Multiple Airlines logo]()
$466
This Kiwi.com deal was found by Cheapflights users on 10/21. 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.
Thu 11/199:50 am -
2 stops17h 07m
Mon 11/238:11 pm -
1 stop22h 32m
Deal found 10/21![Multiple Airlines logo]()
$405
This Kiwi.com deal was found by Cheapflights users on 10/22. 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.
Thu 11/199:50 am -
1 stop11h 48m
Thu 11/2611:26 am -
1 stop7h 25m
Deal found 10/22![Multiple Airlines logo]()
$412
This Kiwi.com deal was found by Cheapflights users on 10/24. 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 11/2310:30 am -
1 stop9h 31m
Tue 12/17:00 am -
1 stop11h 05m
Deal found 10/24![Multiple Airlines logo]()
$460
This Mytrip deal was found by Cheapflights users on 10/21. 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.
Tue 11/249:50 am -
1 stop12h 21m
Tue 12/112:32 pm -
3 stops31h 23m
Deal found 10/21![Multiple Airlines logo]()
$408
This Mytrip deal was found by Cheapflights users on 10/26. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/268:20 am -
3 stops18h 37m
Thu 12/311:16 am -
2 stops24h 44m
Deal found 10/26![Multiple Airlines logo]()
$449
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 October 27, 2026.
Search for one-way flight options from Ontario to San Diego. Find affordable one-way fares based on user searches. Data last updated October 27, 2026.
This Kiwi.com deal was found by Cheapflights users on 10/22. 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 12/89:50 am -
1 stop11h 26m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/22![Multiple Airlines logo]()
$157
This Kiwi.com deal was found by Cheapflights users on 10/25. 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 12/99:50 am -
1 stop11h 26m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/25![Multiple Airlines logo]()
$163
This Kiwi.com deal was found by Cheapflights users on 10/22. 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 12/1511:30 am -
1 stop23h 32m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/22![Multiple Airlines logo]()
$168
This Kiwi.com deal was found by Cheapflights users on 10/24. 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.
Fri 12/1112:00 pm -
3 stops23h 02m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/24![Multiple Airlines logo]()
$179
This Kiwi.com deal was found by Cheapflights users on 10/24. 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.
Fri 11/208:30 pm -
1 stop14h 25m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/24![Multiple Airlines logo]()
$180
This Kiwi.com deal was found by Cheapflights users on 10/25. 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 12/149:10 am -
3 stops25h 52m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/25![Multiple Airlines logo]()
$181
This Kiwi.com deal was found by Cheapflights users on 10/25. 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 12/89:10 am -
3 stops41h 48m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/25![Multiple Airlines logo]()
$184
This Kiwi.com deal was found by Cheapflights users on 10/25. 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.
Sun 11/229:10 am -
3 stops25h 45m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/25![Multiple Airlines logo]()
$184
This Kiwi.com deal was found by Cheapflights users on 10/22. 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.
Sun 12/68:40 am -
2 stops36h 31m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/22![Multiple Airlines logo]()
$188
This Kiwi.com deal was found by Cheapflights users on 10/24. 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 12/91:10 pm -
2 stops37h 48m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/24![Multiple Airlines logo]()
$202
This Kiwi.com deal was found by Cheapflights users on 10/25. 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.
Fri 1/159:10 am -
3 stops34h 21m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/25![Multiple Airlines logo]()
$211
This Kiwi.com deal was found by Cheapflights users on 10/23. 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 12/151:10 pm -
2 stops37h 48m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/23![Multiple Airlines logo]()
$224
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 October 27, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $396 (Kiwi.com) |
One-way from | $157 (Kiwi.com) |
Popular in | August |
Cheapest in | April |
Average price | $573 |
Good round-trip deal | $635 or less |
Good one-way deal | $303 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 October 27, 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
TorontoSan Diego
YYZ Toronto Pearson Intl - SAN San Diego
YYZSAN
Toronto Pearson Intl
Fri 1/8
8:30 pm-12:34 pm
1 stop19h 04m
San Diego
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$179
OttawaSan Diego
YOW Ottawa - SAN San Diego
YOWSAN
Ottawa
Sun 12/6
8:40 am-8:02 am
3 stops26h 22m
San Diego
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$215
OttawaSan Diego
YOW Ottawa - SAN San Diego
YOWSAN
Ottawa
Wed 12/9
7:00 am-6:16 pm
2 stops14h 16m
San Diego
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$215
OttawaSan Diego
YOW Ottawa - SAN San Diego
YOWSAN
Ottawa
Wed 12/9
7:45 am-4:10 pm
1 stop11h 25m
San Diego
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$229
TorontoSan Diego
YTZ Toronto Island - SAN San Diego
YTZSAN
Toronto Island
Fri 1/15
4:35 pm-4:31 pm
2 stops26h 56m
San Diego
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$232
OttawaSan Diego
YOW Ottawa - SAN San Diego
YOWSAN
Ottawa
Fri 11/27
6:00 am-12:00 pm
1 stop9h 00m
San Diego
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$233
OttawaSan Diego
YOW Ottawa - SAN San Diego
YOWSAN
Ottawa
Sun 1/17
6:10 am-2:14 pm
2 stops35h 04m
San Diego
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$237
OttawaSan Diego
YOW Ottawa - SAN San Diego
YOWSAN
Ottawa
Wed 11/18
6:10 am-10:11 am
2 stops31h 01m
San Diego
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$241
TorontoSan Diego
YTZ Toronto Island - SAN San Diego
YTZSAN
Toronto Island
Mon 1/11
9:10 am-11:58 pm
3 stops41h 48m
San Diego
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$242
TorontoSan Diego
YYZ Toronto Pearson Intl - SAN San Diego
YYZSAN
Toronto Pearson Intl
Fri 11/13
5:15 pm-12:07 pm
2 stops21h 52m
San Diego
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$243
Showing 1-10 of 53 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.
YYZ-SAN
YOW-SAN
YTZ-SAN
YKF-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
YYZ-SAN
YOW-SAN
YTZ-SAN
YKF-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 $429). Flying from Region of Ontario to San Diego in October is currently the most expensive (average of $559). 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 October 27, 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 October 27, 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 $455 and $715 in November.The cheapest round-trip price found within the last 5 days was $396 on Multiple Airlines (Nov 12-Nov 16).
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
San Ysidro
Poway
Coronado
La Mesa
Julian
Santee
Lemon Grove
Browse thousands of different options on Cheapflights for your next trip
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Alternative routes for Ontario to San Diego
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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 October 27, 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 October 27, 2026.
Ontario to San Diego flights
Consider these flights traveling from Ontario to San Diego.
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 7,457,451 searches. Data last updated October 27, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$280 | Average$304 | FlexibilityNo cancel fee | On-time60% | |
| Cheapest$314 | Average$569 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$323 | Average$481 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$333 | Average$459 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$377 | Average$575 | FlexibilityNo cancel fee | On-time69% |