$145+ Cheap flights from San Diego (SAN) to Ontario
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/22. Fares are subject to change and may not be available on all flights or dates of travel.
SAN — YYZ
May 29 — Jun 51
Round-trip
1 adult, Economy
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Cheapest flights from San Diego to OntarioExplore the most affordable flight options available from San Diego to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 29, 2026.
Explore the most affordable flight options available from San Diego to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 29, 2026.
This FlightHub 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/243:30 pm
SAN
- YYZ
1 stop11h 15m
WestJet
Tue 9/298:00 am
YYZ
- SAN
1 stop9h 10m
WestJet
Deal found 4/28![WestJet logo]()
$301
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.
Tue 9/83:30 pm
SAN
- YYZ
1 stop11h 15m
WestJet
Mon 9/218:00 am
YYZ
- SAN
1 stop9h 10m
WestJet
Deal found 4/27![WestJet logo]()
$307
This oojo 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/153:30 pm
SAN
- YYZ
1 stop11h 15m
WestJet
Thu 10/228:00 am
YYZ
- SAN
1 stop9h 10m
WestJet
Deal found 4/28![WestJet logo]()
$320
This oojo deal was found by Cheapflights users on 4/26. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/163:30 pm
SAN
- YYZ
1 stop11h 15m
WestJet
Sun 10/256:30 pm
YYZ
- SAN
2 stops20h 15m
WestJet
Deal found 4/26![WestJet logo]()
$325
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.
Fri 10/161:10 pm
SAN
- YYZ
Nonstop5h 00m
Air Canada
Sun 10/258:15 am
YYZ
- SAN
Nonstop5h 38m
Air Canada
Deal found 4/28![Air Canada logo]()
$326
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.
Wed 9/93:30 pm
SAN
- YYZ
1 stop11h 15m
Multiple Airlines
Tue 9/159:45 am
YYZ
- SAN
1 stop12h 02m
Multiple Airlines
Deal found 4/27![Multiple Airlines logo]()
$330
This Justfly.com deal was found by Cheapflights users on 4/25. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/153:30 pm
SAN
- YYZ
1 stop11h 15m
WestJet
Sat 9/1910:25 pm
YYZ
- SAN
1 stop18h 45m
WestJet
Deal found 4/25![WestJet logo]()
$331
This deal was found by Cheapflights users on 4/29. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/87:00 am
SAN
- YYZ
1 stop9h 53m
Air Canada
Wed 9/1610:00 am
YYZ
- SAN
Nonstop5h 16m
Air Canada
Deal found 4/29![Air Canada logo]()
$334
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.
Fri 9/113:30 pm
SAN
- YUL
1 stop12h 35m
WestJet
Tue 9/157:15 am
YUL
- SAN
1 stop9h 55m
WestJet
Deal found 4/28![WestJet logo]()
$345
This Trip.com deal was found by Cheapflights users on 4/29. 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.
Mon 9/143:30 pm
SAN
- YUL
1 stop12h 35m
WestJet
Wed 9/237:15 am
YUL
- SAN
1 stop9h 55m
WestJet
Deal found 4/29![WestJet logo]()
$346
This Kiwi.com deal was found by Cheapflights users on 4/24. 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.
Thu 9/173:30 pm
SAN
- YUL
1 stop12h 35m
WestJet
Sun 9/207:15 am
YUL
- SAN
1 stop9h 55m
WestJet
Deal found 4/24![WestJet logo]()
$347
This Trip.com deal was found by Cheapflights users on 4/26. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/103:30 pm
SAN
- YXU
1 stop10h 50m
WestJet
Wed 6/176:10 am
YXU
- SAN
1 stop11h 00m
WestJet
Deal found 4/26![WestJet logo]()
$348
Best flights from San Diego to OntarioDiscover carefully curated flight deals from San Diego to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 29, 2026.
Discover carefully curated flight deals from San Diego to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 29, 2026.
This FlightHub deal was found by Cheapflights users on 4/24. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/253:30 pm
SAN
- YYZ
1 stop11h 15m
WestJet
Mon 10/56:35 pm
YYZ
- SAN
2 stops22h 35m
WestJet
Deal found 4/24![WestJet logo]()
$352
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.
Sat 9/197:00 am
SAN
- YXU
2 stops11h 40m
Air Canada
Wed 9/235:40 am
YXU
- SAN
1 stop9h 36m
Air Canada
Deal found 4/28![Air Canada logo]()
$352
This United Airlines deal was found by Cheapflights users on 4/24. 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.
Tue 10/208:00 am
SAN
- YUL
1 stop8h 45m
United Airlines
Sat 10/243:25 pm
YUL
- SAN
1 stop9h 59m
United Airlines
Deal found 4/24![United Airlines logo]()
$394
This Delta deal was found by Cheapflights users on 4/24. 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.
Sat 10/38:50 am
SAN
- YUL
1 stop11h 44m
Delta
Sun 10/186:00 am
YUL
- SAN
1 stop11h 11m
Delta
Deal found 4/24![Delta logo]()
$395
This Mytrip deal was found by Cheapflights users on 4/26. 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 5/283:30 pm
SAN
- YKF
2 stops23h 50m
Multiple Airlines
Wed 6/37:05 pm
YKF
- SAN
2 stops22h 05m
Multiple Airlines
Deal found 4/26![Multiple Airlines logo]()
$643
This United Airlines deal was found by Cheapflights users on 4/29. 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 9/1410:40 pm
SAN
- YUL
1 stop9h 00m
United Airlines
Wed 9/239:15 am
YUL
- SAN
1 stop8h 42m
United Airlines
Deal found 4/29![United Airlines logo]()
$395
This WestJet 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 WestJet is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/193:30 pm
SAN
- YXU
1 stop10h 50m
WestJet
Wed 9/236:10 am
YXU
- SAN
1 stop11h 00m
WestJet
Deal found 4/28![WestJet logo]()
$417
This Air Canada deal was found by Cheapflights users on 4/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/268:15 am
SAN
- YQT
2 stops12h 14m
Air Canada
Sat 9/55:10 am
YQT
- SAN
1 stop9h 25m
Air Canada
Deal found 4/26![Air Canada logo]()
$419
This United Airlines deal was found by Cheapflights users on 4/26. 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 10/202:09 pm
SAN
- YYZ
1 stop6h 50m
United Airlines
Thu 10/296:10 am
YYZ
- SAN
1 stop10h 37m
United Airlines
Deal found 4/26![United Airlines logo]()
$414
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.
Sat 6/2010:15 pm
SAN
- YYZ
1 stop10h 04m
Delta
Sun 6/285:45 pm
YYZ
- SAN
1 stop7h 33m
Delta
Deal found 4/28![Delta logo]()
$468
This Justfly.com deal was found by Cheapflights users on 4/24. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/33:30 pm
SAN
- YUL
1 stop12h 35m
WestJet
Sun 10/186:45 am
YUL
- SAN
2 stops34h 25m
WestJet
Deal found 4/24![WestJet logo]()
$436
This Air Canada deal was found by Cheapflights users on 4/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/131:15 pm
SAN
- YXU
1 stop16h 38m
Air Canada
Sun 5/175:10 am
YXU
- SAN
1 stop10h 08m
Air Canada
Deal found 4/26![Air Canada logo]()
$458
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.
Sun 6/216:15 am
SAN
- YYZ
1 stop7h 20m
Delta
Sun 6/285:45 pm
YYZ
- SAN
1 stop7h 33m
Delta
Deal found 4/28![Delta logo]()
$468
This oojo deal was found by Cheapflights users on 4/26. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/263:30 pm
SAN
- YQT
1 stop24h 30m
WestJet
Sat 9/57:50 pm
YQT
- SAN
1 stop21h 20m
WestJet
Deal found 4/26![WestJet logo]()
$455
This Air Canada deal was found by Cheapflights users on 4/24. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/257:00 am
SAN
- YTZ
1 stop9h 50m
Air Canada
Mon 10/512:30 pm
YTZ
- SAN
1 stop11h 06m
Air Canada
Deal found 4/24![Air Canada logo]()
$466
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.
Fri 6/198:00 am
SAN
- YUL
1 stop12h 55m
Delta
Mon 7/67:00 am
YUL
- SAN
1 stop12h 56m
Delta
Deal found 4/28![Delta logo]()
$479
This United Airlines deal was found by Cheapflights users on 4/29. 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 5/1311:00 am
SAN
- YYZ
1 stop7h 32m
United Airlines
Wed 5/206:10 am
YYZ
- SAN
1 stop10h 40m
United Airlines
Deal found 4/29![United Airlines logo]()
$484
This Booking.com deal was found by Cheapflights users on 4/26. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/103:30 pm
SAN
- YXU
2 stops43h 20m
WestJet
Wed 6/176:10 am
YXU
- SAN
1 stop11h 00m
WestJet
Deal found 4/26![WestJet logo]()
$468
This Air Canada deal was found by Cheapflights users on 4/24. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/271:15 pm
SAN
- YQT
1 stop18h 35m
Air Canada
Fri 5/295:10 am
YQT
- SAN
1 stop10h 08m
Air Canada
Deal found 4/24![Air Canada logo]()
$478
This Delta deal was found by Cheapflights users on 4/29. 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 6/1810:43 am
SAN
- YYZ
1 stop10h 15m
Delta
Sun 6/216:05 am
YYZ
- SAN
1 stop7h 19m
Delta
Deal found 4/29![Delta logo]()
$482
This United Airlines deal was found by Cheapflights users on 4/24. 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.
Wed 5/279:05 pm
SAN
- YYZ
1 stop9h 14m
United Airlines
Fri 5/297:00 am
YYZ
- SAN
1 stop11h 27m
United Airlines
Deal found 4/24![United Airlines logo]()
$484
This oojo deal was found by Cheapflights users on 4/24. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/253:30 pm
SAN
- YKF
1 stop25h 20m
WestJet
Mon 10/58:40 pm
YKF
- SAN
1 stop20h 30m
WestJet
Deal found 4/24![WestJet logo]()
$474
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.
Wed 5/1310:25 pm
SAN
- YYZ
1 stop8h 54m
Delta
Wed 5/2012:09 pm
YYZ
- SAN
1 stop8h 52m
Delta
Deal found 4/28![Delta logo]()
$484
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.
Mon 8/102:00 pm
SAN
- YYZ
1 stop6h 59m
United Airlines
Sat 8/155:15 pm
YYZ
- SAN
1 stop7h 55m
United Airlines
Deal found 4/27![United Airlines logo]()
$485
This Mytrip deal was found by Cheapflights users on 4/29. 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 5/283:30 pm
SAN
- YHM
2 stops28h 04m
Multiple Airlines
Wed 6/35:45 pm
YHM
- SAN
2 stops23h 25m
Multiple Airlines
Deal found 4/29![Multiple Airlines logo]()
$716
This oojo deal was found by Cheapflights users on 4/24. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/243:30 pm
SAN
- YKF
1 stop25h 20m
WestJet
Mon 10/58:40 pm
YKF
- SAN
1 stop20h 30m
WestJet
Deal found 4/24![WestJet logo]()
$474
This Delta deal was found by Cheapflights users on 4/25. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/148:00 am
SAN
- YUL
1 stop12h 57m
Delta
Fri 6/55:06 pm
YUL
- SAN
1 stop7h 54m
Delta
Deal found 4/25![Delta logo]()
$484
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.
Tue 6/2310:40 pm
SAN
- YYZ
1 stop8h 14m
United Airlines
Mon 6/297:00 am
YYZ
- SAN
1 stop7h 21m
United Airlines
Deal found 4/28![United Airlines logo]()
$498
This Mytrip deal was found by Cheapflights users on 4/26. 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.
Fri 5/293:30 pm
SAN
- YHM
2 stops28h 04m
Multiple Airlines
Sun 5/315:45 pm
YHM
- SAN
2 stops23h 25m
Multiple Airlines
Deal found 4/26![Multiple Airlines logo]()
$748
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/108:00 am
SAN
- YUL
1 stop12h 57m
Delta
Fri 6/57:00 am
YUL
- SAN
1 stop8h 38m
Delta
Deal found 4/27![Delta logo]()
$484
Last-minute flights from San Diego to OntarioDiscover last-minute flight deals from San Diego to Ontario. Data last updated April 29, 2026 and is based on user searches.
Discover last-minute flight deals from San Diego to Ontario. Data last updated April 29, 2026 and is based on user searches.
This Flightnetwork deal was found by Cheapflights users on 4/26. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/107:00 am
SAN
- YUL
Nonstop5h 31m
Air Canada
Sun 5/175:45 pm
YUL
- SAN
Nonstop5h 58m
Air Canada
Deal found 4/26![Air Canada logo]()
$390
This Flightnetwork 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/117:00 am
SAN
- YUL
Nonstop5h 31m
Air Canada
Sun 5/175:45 pm
YUL
- SAN
Nonstop5h 58m
Air Canada
Deal found 4/27![Air Canada logo]()
$392
This Kiwi.com deal was found by Cheapflights users on 4/26. 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.
Wed 5/139:59 pm
SAN
- YYZ
2 stops23h 00m
Multiple Airlines
Wed 5/207:00 am
YYZ
- SAN
1 stop10h 10m
Multiple Airlines
Deal found 4/26![Multiple Airlines logo]()
$365
This Gotogate deal was found by Cheapflights users on 4/25. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/137:00 am
SAN
- YUL
Nonstop5h 31m
Air Canada
Sat 5/165:45 pm
YUL
- SAN
Nonstop5h 58m
Air Canada
Deal found 4/25![Air Canada logo]()
$402
This Kiwi.com deal was found by Cheapflights users on 4/25. 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 5/153:30 pm
SAN
- YYZ
1 stop11h 15m
WestJet
Wed 5/207:00 am
YYZ
- SAN
1 stop10h 10m
WestJet
Deal found 4/25![WestJet logo]()
$347
This Kiwi.com deal was found by Cheapflights users on 4/25. 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 5/153:30 pm
SAN
- YYZ
1 stop11h 15m
WestJet
Mon 5/186:10 am
YYZ
- SAN
2 stops11h 00m
WestJet
Deal found 4/25![WestJet logo]()
$351
This Kiwi.com deal was found by Cheapflights users on 4/25. 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 5/153:30 pm
SAN
- YYZ
1 stop11h 15m
Multiple Airlines
Wed 5/206:15 am
YYZ
- SAN
2 stops15h 24m
Multiple Airlines
Deal found 4/25![Multiple Airlines logo]()
$370
This Kiwi.com deal was found by Cheapflights users on 4/25. 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.
Sat 5/169:59 pm
SAN
- YYZ
2 stops19h 06m
Multiple Airlines
Wed 5/207:00 am
YYZ
- SAN
1 stop10h 10m
Multiple Airlines
Deal found 4/25![Multiple Airlines logo]()
$358
This Kiwi.com deal was found by Cheapflights users on 4/25. 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.
Sat 5/233:30 pm
SAN
- YYZ
1 stop11h 15m
WestJet
Fri 6/57:00 am
YYZ
- SAN
1 stop10h 10m
WestJet
Deal found 4/25![WestJet logo]()
$348
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.
Tue 5/269:37 am
SAN
- YYZ
2 stops36h 28m
Multiple Airlines
Tue 6/29:55 am
YYZ
- SAN
1 stop25h 52m
Multiple Airlines
Deal found 4/28![Multiple Airlines logo]()
$350
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.
Tue 5/263:30 pm
SAN
- YYZ
1 stop11h 15m
WestJet
Tue 6/27:00 am
YYZ
- SAN
1 stop10h 10m
WestJet
Deal found 4/28![WestJet logo]()
$354
This Kiwi.com deal was found by Cheapflights users on 4/29. 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 5/2710:07 pm
SAN
- YYZ
1 stop22h 47m
Multiple Airlines
Wed 6/39:45 am
YYZ
- SAN
1 stop16h 59m
Multiple Airlines
Deal found 4/29![Multiple Airlines logo]()
$369
One-way flights from San Diego to OntarioSearch for one-way flight options from San Diego to Ontario. Find affordable one-way fares based on user searches. Data last updated April 29, 2026.
Search for one-way flight options from San Diego to Ontario. Find affordable one-way fares based on user searches. Data last updated April 29, 2026.
This Mytrip 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/227:00 am
SAN
- YUL
Nonstop5h 27m
Air Canada
Deal found 4/27![Air Canada logo]()
$145
This Air Canada deal was found by Cheapflights users on 4/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/37:00 am
SAN
- YUL
Nonstop5h 27m
Air Canada
Deal found 4/26![Air Canada logo]()
$158
This United Airlines deal was found by Cheapflights users on 4/29. 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 9/126:30 am
SAN
- YUL
2 stops11h 56m
United Airlines
Deal found 4/29![United Airlines logo]()
$166
This American Airlines deal was found by Cheapflights users on 4/26. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/33:04 pm
SAN
- YUL
1 stop17h 11m
American Airlines
Deal found 4/26![American Airlines logo]()
$168
This United Airlines deal was found by Cheapflights users on 4/26. 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 10/35:00 pm
SAN
- YUL
2 stops12h 16m
United Airlines
Deal found 4/26![United Airlines logo]()
$173
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.
Thu 10/223:30 pm
SAN
- YUL
2 stops23h 50m
WestJet
Deal found 4/27![WestJet logo]()
$184
This Justfly.com deal was found by Cheapflights users on 4/29. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/135:00 pm
SAN
- YUL
1 stop11h 05m
WestJet
Deal found 4/29![WestJet logo]()
$192
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.
Wed 6/39:43 am
SAN
- YUL
3 stops35h 42m
Multiple Airlines
Deal found 4/27![Multiple Airlines logo]()
$193
This Mytrip deal was found by Cheapflights users on 4/29. 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.
Wed 5/277:00 am
SAN
- YUL
Nonstop5h 31m
Air Canada
Deal found 4/29![Air Canada logo]()
$195
This Kiwi.com deal was found by Cheapflights users on 4/26. 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.
Sat 6/69:43 am
SAN
- YOW
2 stops16h 52m
Multiple Airlines
Deal found 4/26![Multiple Airlines logo]()
$205
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.
Wed 5/133:30 pm
SAN
- YYZ
1 stop26h 45m
WestJet
Deal found 4/28![WestJet logo]()
$208
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.
Tue 6/98:00 am
SAN
- YTZ
3 stops50h 00m
Multiple Airlines
Deal found 4/28![Multiple Airlines logo]()
$208
Find flight deals from San Diego to Ontario
Keep the following information in mind while searching for San Diego to Ontario flight deals. Data was last updated April 29, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $301 (FlightHub) |
One-way from | $145 (Mytrip) |
Popular in | October |
Cheapest in | May |
Average price | $548 |
Good round-trip deal | $440 or less |
Good one-way deal | $239 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from San Diego to Ontario that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated April 29, 2026.
Use the filters below to find and compare flights from San Diego to Ontario that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
San DiegoToronto
SAN - YYZ
SANYYZ
San Diego
Fri 9/25
3:30 pm-5:45 am
1 stop11h 15m
Toronto Pearson Intl
Mon 10/5
6:35 pm-2:10 pm
2 stops22h 35m
$352
San DiegoLondon
SAN - YXU
SANYXU
San Diego
Sat 9/19
7:00 am-9:40 pm
2 stops11h 40m
London
Wed 9/23
5:40 am-12:16 pm
1 stop9h 36m
$352
San DiegoMontreal
SAN - YUL
SANYUL
San Diego
Tue 10/20
8:00 am-7:45 pm
1 stop8h 45m
Montreal Pierre Elliott Trudeau Intl
Sat 10/24
3:25 pm-10:24 pm
1 stop9h 59m
$394
San DiegoMontreal
SAN - YUL
SANYUL
San Diego
Sat 10/3
8:50 am-11:34 pm
1 stop11h 44m
Montreal Pierre Elliott Trudeau Intl
Sun 10/18
6:00 am-2:11 pm
1 stop11h 11m
$395
San DiegoMontreal
SAN - YUL
SANYUL
San Diego
Mon 9/14
10:40 pm-10:40 am
1 stop9h 00m
Montreal Pierre Elliott Trudeau Intl
Wed 9/23
9:15 am-2:57 pm
1 stop8h 42m
$395
San DiegoToronto
SAN - YYZ
SANYYZ
San Diego
Tue 10/20
2:09 pm-11:59 pm
1 stop6h 50m
Toronto Pearson Intl
Thu 10/29
6:10 am-1:47 pm
1 stop10h 37m
$414
San DiegoLondon
SAN - YXU
SANYXU
San Diego
Sat 9/19
3:30 pm-5:20 am
1 stop10h 50m
London
Wed 9/23
6:10 am-2:10 pm
1 stop11h 00m
$417
San DiegoThunder Bay
SAN - YQT
SANYQT
San Diego
Wed 8/26
8:15 am-11:29 pm
2 stops12h 14m
Thunder Bay
Sat 9/5
5:10 am-11:35 am
1 stop9h 25m
$419
San DiegoMontreal
SAN - YUL
SANYUL
San Diego
Sat 10/3
3:30 pm-7:05 am
1 stop12h 35m
Montreal Pierre Elliott Trudeau Intl
Sun 10/18
6:45 am-2:10 pm
2 stops34h 25m
$436
San DiegoThunder Bay
SAN - YQT
SANYQT
San Diego
Wed 8/26
3:30 pm-7:00 pm
1 stop24h 30m
Thunder Bay
Sat 9/5
7:50 pm-2:10 pm
1 stop21h 20m
$455
Showing 1-10 of 60 resultsSorted by cheapest first
Best time to book a flight from San Diego to Ontario
Have a flexible travel schedule? Discover the best time to fly to Ontario from San Diego with our price prediction graph.
SAN-YUL
SAN-YOW
SAN-YTZ
SAN-YYZ
SAN-YHM
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from San Diego to Ontario
SAN-CAON
SAN-YUL
SAN-YOW
SAN-YTZ
SAN-YYZ
How far ahead should I book a flight from San Diego to Region of Ontario?
The price you pay for your flight from San Diego to Region of Ontario may vary depending on when you book. For the best chance of a lower fare, look to book 90 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.
What is the cheapest month to book a flight from San Diego to Region of Ontario?
Currently, April is the cheapest month in which you can book a flight from San Diego to Region of Ontario (average of $121). Flying from San Diego to Region of Ontario in January is currently the most expensive (average of $263). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
What is the cheapest time of day to fly from SAN to ON?
Find hourly flight availability from San Diego to Ontario. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 29, 2026.
When flying from San Diego to Region of Ontario, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.
How much does it cost to fly round-trip from San Diego to Region of Ontario?
Reviews of airlines servicing Ontario
Get insights into the airlines that provide service to Ontario. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Ontario. Reviews last updated April 29, 2026.
See what other customers who have flown with Porter Airlines,Delta, andUnited Airlines from San Diego to Ontario have to say. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Overall
8.0
Food
7.6
Crew
8.6
Entertainment
7.0
Boarding
8.2
Comfort
8.0
Reviews
1 / 20
10.0
ExcellentJohn,Mar 2026
YYZ - PVR
Overall
8.0
Food
7.6
Crew
8.6
Entertainment
7.0
Boarding
8.2
Comfort
8.0
Reviews
1 / 20
10.0
ExcellentJohn,Mar 2026
YYZ - PVR
Overall
8.0
Food
7.6
Crew
8.6
Entertainment
7.0
Boarding
8.2
Comfort
8.0
Reviews
1 / 20
10.0
ExcellentJohn,Mar 2026
YYZ - PVR
Overall
8.0
Food
7.6
Crew
8.6
Entertainment
7.0
Boarding
8.2
Comfort
8.0
Reviews
1 / 20
10.0
ExcellentJohn,Mar 2026
YYZ - PVR
Overall
8.0
Food
7.6
Crew
8.6
Entertainment
7.0
Boarding
8.2
Comfort
8.0
Reviews
1 / 20
10.0
ExcellentJohn,Mar 2026
YYZ - PVR
Overall
8.0
Food
7.6
Crew
8.6
Entertainment
7.0
Boarding
8.2
Comfort
8.0
Reviews
1 / 20
10.0
ExcellentJohn,Mar 2026
YYZ - PVR
Related info for your journey
Find useful and relevant information for your journey from San Diego to Ontario. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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Alternative routes for San Diego to Ontario
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Ontario by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from San Diego to Ontario by cabin class
Find flights from San Diego to Ontario, based on your preferred cabin class, be it economy, premium economy, business, or first class.
San Diego and Ontario flights
Browse other San Diego and Ontario flight options. Last updated on April 29, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
San Diego to Ontario flights
Consider these flights traveling from San Diego to Ontario.
Top 5 airlines flying from San Diego to Ontario
Discover the top 5 airlines that operate flights from San Diego to Ontario. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated April 29, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$147 | Average$324 | FlexibilityNo cancel fee | On-time52% | |
| Cheapest$153 | Average$449 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$218 | Average$509 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$273 | Average$550 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$388 | Average$554 | FlexibilityNo cancel fee | On-time71% |