$145+ Cheap flights from San Diego (SAN) to Ontario
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 11/3. Fares are subject to change and may not be available on all flights or dates of travel.
SAN — YYZ
Oct 7 — Oct 141
Round-trip
1 adult, Economy
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Find cheap flights from San Diego to Ontario 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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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 September 7, 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 September 7, 2026.
This Kiwi.com deal was found by Cheapflights users on 9/2. 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 10/83:30 pm -
1 stop10h 50m
Thu 10/156:10 am -
1 stop11h 00m
Deal found 9/2![WestJet logo]()
$289
This Justfly.com deal was found by Cheapflights users on 9/4. 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.
Fri 9/113:30 pm -
1 stop10h 50m
Tue 9/156:10 am -
1 stop11h 00m
Deal found 9/4![WestJet logo]()
$297
This Trip.com deal was found by Cheapflights users on 9/3. 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 10/183:30 pm -
1 stop11h 05m
Sun 10/256:10 am -
1 stop10h 30m
Deal found 9/3![WestJet logo]()
$305
This Trip.com deal was found by Cheapflights users on 9/2. 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 9/293:30 pm -
1 stop12h 35m
Tue 10/67:15 am -
1 stop9h 55m
Deal found 9/2![WestJet logo]()
$313
This Trip.com deal was found by Cheapflights users on 9/3. 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.
Thu 10/13:30 pm -
1 stop22h 00m
Sat 10/37:15 am -
1 stop9h 55m
Deal found 9/3![WestJet logo]()
$314
This Kiwi.com deal was found by Cheapflights users on 9/3. 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 9/303:30 pm -
2 stops29h 55m
Fri 10/27:15 am -
1 stop9h 55m
Deal found 9/3![WestJet logo]()
$315
This Trip.com deal was found by Cheapflights users on 9/2. 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 10/193:30 pm -
1 stop12h 35m
Fri 10/237:15 am -
1 stop9h 55m
Deal found 9/2![WestJet logo]()
$318
This Justfly.com deal was found by Cheapflights users on 9/3. 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.
Fri 9/113:30 pm -
1 stop12h 35m
Tue 9/157:15 am -
1 stop9h 55m
Deal found 9/3![WestJet logo]()
$319
This Kiwi.com deal was found by Cheapflights users on 9/2. 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 10/203:30 pm -
2 stops23h 50m
Fri 10/237:15 am -
1 stop9h 55m
Deal found 9/2![WestJet logo]()
$323
This Justfly.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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/163:30 pm -
1 stop12h 35m
Tue 10/207:15 am -
1 stop9h 55m
Deal found 9/6![WestJet logo]()
$325
This WestJet deal was found by Cheapflights users on 9/2. 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.
Tue 9/293:30 pm -
1 stop10h 50m
Sat 10/36:10 am -
1 stop11h 00m
Deal found 9/2![WestJet logo]()
$326
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.
Wed 9/301:38 pm -
2 stops12h 57m
Wed 11/186:10 am -
1 stop9h 30m
Deal found 9/6![Multiple Airlines logo]()
$327
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 September 7, 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 September 7, 2026.
This Kiwi.com deal was found by Cheapflights users on 9/2. 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 10/83:30 pm -
1 stop10h 50m
Thu 10/156:10 am -
1 stop11h 00m
Deal found 9/2![WestJet logo]()
$289
This United deal was found by Cheapflights users on 9/3. 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 11/139:40 pm -
1 stop12h 48m
Tue 11/177:50 am -
2 stops11h 35m
Deal found 9/3![Multiple Airlines logo]()
$351
This Delta deal was found by Cheapflights users on 9/3. 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 11/41:18 pm -
1 stop7h 07m
Tue 11/1012:44 pm -
1 stop12h 50m
Deal found 9/3![Delta logo]()
$351
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 11/239:45 pm -
1 stop14h 22m
Thu 11/266:15 am -
1 stop8h 12m
Deal found 9/5![United Airlines logo]()
$361
This Air Canada deal was found by Cheapflights users on 9/2. 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 10/176:40 am -
2 stops13h 18m
Tue 10/205:15 am -
2 stops13h 45m
Deal found 9/2![Air Canada logo]()
$450
This Alaska Airlines deal was found by Cheapflights users on 9/3. 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 11/126:35 pm -
2 stops18h 30m
Tue 11/175:15 pm -
2 stops23h 43m
Deal found 9/3![Alaska Airlines logo]()
$531
This WestJet deal was found by Cheapflights users on 9/2. 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.
Tue 9/293:30 pm -
1 stop10h 50m
Sat 10/36:10 am -
1 stop11h 00m
Deal found 9/2![WestJet logo]()
$326
This Delta deal was found by Cheapflights users on 9/2. 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 10/210:30 pm -
1 stop12h 06m
Sun 10/45:10 pm -
1 stop7h 56m
Deal found 9/2![Delta logo]()
$359
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.
Tue 10/133:56 pm -
1 stop13h 20m
Fri 10/166:35 pm -
1 stop17h 09m
Deal found 9/6![United Airlines logo]()
$370
This Justfly.com deal was found by Cheapflights users on 9/2. 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 10/83:30 pm -
2 stops16h 45m
Sun 10/1112:40 pm -
2 stops28h 30m
Deal found 9/2![WestJet logo]()
$353
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.
Tue 11/249:45 pm -
1 stop14h 22m
Thu 11/266:00 am -
2 stops11h 55m
Deal found 9/5![United Airlines logo]()
$371
This Mytrip deal was found by Cheapflights users on 9/2. 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 9/303:30 pm -
3 stops23h 05m
Wed 10/76:10 pm -
1 stop23h 00m
Deal found 9/2![Multiple Airlines logo]()
$421
This Delta deal was found by Cheapflights users on 9/2. 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 10/110:20 pm -
1 stop10h 38m
Sun 10/47:00 am -
1 stop13h 05m
Deal found 9/2![Delta logo]()
$396
This Booking.com deal was found by Cheapflights users on 9/2. 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 9/303:30 pm -
1 stop11h 05m
Wed 10/74:15 pm -
1 stop24h 55m
Deal found 9/2![WestJet logo]()
$360
This United Airlines deal was found by Cheapflights users on 9/3. 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 10/179:45 am -
2 stops21h 11m
Tue 10/205:20 pm -
1 stop8h 21m
Deal found 9/3![United Airlines logo]()
$375
This Air Canada deal was found by Cheapflights users on 9/3. 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 9/291:10 pm -
1 stop17h 10m
Sat 10/38:20 pm -
2 stops27h 16m
Deal found 9/3![Air Canada logo]()
$464
This Delta deal was found by Cheapflights users on 9/4. 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 9/196:15 am -
1 stop7h 04m
Sun 10/412:48 pm -
1 stop12h 18m
Deal found 9/4![Delta logo]()
$407
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.
Tue 10/207:41 pm -
2 stops11h 59m
Wed 10/216:35 pm -
1 stop8h 56m
Deal found 9/6![United Airlines logo]()
$376
This FlightHub deal was found by Cheapflights users on 9/4. 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 12/71:30 pm -
2 stops32h 14m
Thu 12/104:15 pm -
1 stop23h 25m
Deal found 9/4![WestJet logo]()
$378
This Kiwi.com deal was found by Cheapflights users on 9/2. 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 10/83:14 pm -
2 stops22h 31m
Thu 10/156:10 am -
1 stop11h 00m
Deal found 9/2![Multiple Airlines logo]()
$458
This Alaska 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/281:10 pm -
2 stops23h 55m
Mon 11/25:15 pm -
2 stops26h 07m
Deal found 9/5![Alaska Airlines logo]()
$550
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.
Tue 9/221:10 pm -
Nonstop5h 00m
Sat 9/262:00 pm -
1 stop9h 36m
Deal found 9/6![Air Canada logo]()
$506
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.
Tue 10/203:30 pm -
1 stop22h 45m
Tue 10/274:05 pm -
2 stops24h 35m
Deal found 9/5![Multiple Airlines logo]()
$460
This United Airlines deal was found by Cheapflights users on 9/2. 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 9/296:40 am -
1 stop7h 50m
Tue 10/66:35 pm -
1 stop8h 56m
Deal found 9/2![United Airlines logo]()
$396
This Flightnetwork deal was found by Cheapflights users on 9/2. 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.
Wed 9/303:30 pm -
1 stop22h 45m
Wed 10/76:10 pm -
1 stop23h 00m
Deal found 9/2![WestJet logo]()
$424
This Air Canada deal was found by Cheapflights users on 9/4. 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 10/194:50 pm -
2 stops12h 35m
Mon 10/268:30 pm -
2 stops17h 57m
Deal found 9/4![Air Canada logo]()
$525
This Alaska 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/312:15 pm -
2 stops24h 50m
Mon 11/95:15 pm -
2 stops26h 07m
Deal found 9/7![Alaska Airlines logo]()
$587
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 9/308:00 am -
2 stops11h 35m
Wed 11/182:00 pm -
2 stops11h 30m
Deal found 9/6![United Airlines logo]()
$401
This Kiwi.com deal was found by Cheapflights users on 9/4. 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 10/138:34 pm -
1 stop12h 08m
Fri 10/161:45 pm -
1 stop23h 11m
Deal found 9/4![Multiple Airlines logo]()
$505
This Trip.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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/203:30 pm -
1 stop22h 45m
Tue 10/274:25 pm -
1 stop24h 15m
Deal found 9/5![WestJet logo]()
$434
Last-minute flights from San Diego to OntarioDiscover last-minute flight deals from San Diego to Ontario. Data last updated September 7, 2026 and is based on user searches.
Discover last-minute flight deals from San Diego to Ontario. Data last updated September 7, 2026 and is based on user searches.
This Justfly.com deal was found by Cheapflights users on 9/4. 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.
Fri 9/113:30 pm -
1 stop10h 50m
Tue 9/156:10 am -
1 stop11h 00m
Deal found 9/4![WestJet logo]()
$297
This Justfly.com deal was found by Cheapflights users on 9/3. 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.
Fri 9/113:30 pm -
1 stop12h 35m
Tue 9/157:15 am -
1 stop9h 55m
Deal found 9/3![WestJet logo]()
$319
This Trip.com deal was found by Cheapflights users on 9/2. 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 9/293:30 pm -
1 stop12h 35m
Tue 10/67:15 am -
1 stop9h 55m
Deal found 9/2![WestJet logo]()
$313
This WestJet deal was found by Cheapflights users on 9/2. 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.
Tue 9/293:30 pm -
1 stop10h 50m
Sat 10/36:10 am -
1 stop11h 00m
Deal found 9/2![WestJet logo]()
$326
This Kiwi.com deal was found by Cheapflights users on 9/3. 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 9/303:30 pm -
2 stops29h 55m
Fri 10/27:15 am -
1 stop9h 55m
Deal found 9/3![WestJet logo]()
$315
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.
Wed 9/301:38 pm -
2 stops12h 57m
Wed 11/186:10 am -
1 stop9h 30m
Deal found 9/6![Multiple Airlines logo]()
$327
This Trip.com deal was found by Cheapflights users on 9/3. 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.
Thu 10/13:30 pm -
1 stop22h 00m
Sat 10/37:15 am -
1 stop9h 55m
Deal found 9/3![WestJet logo]()
$314
This Kiwi.com deal was found by Cheapflights users on 9/2. 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 10/83:30 pm -
1 stop10h 50m
Thu 10/156:10 am -
1 stop11h 00m
Deal found 9/2![WestJet logo]()
$289
This Justfly.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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/163:30 pm -
1 stop12h 35m
Tue 10/207:15 am -
1 stop9h 55m
Deal found 9/6![WestJet logo]()
$325
This Trip.com deal was found by Cheapflights users on 9/3. 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 10/183:30 pm -
1 stop11h 05m
Sun 10/256:10 am -
1 stop10h 30m
Deal found 9/3![WestJet logo]()
$305
This Trip.com deal was found by Cheapflights users on 9/2. 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 10/193:30 pm -
1 stop12h 35m
Fri 10/237:15 am -
1 stop9h 55m
Deal found 9/2![WestJet logo]()
$318
This Kiwi.com deal was found by Cheapflights users on 9/2. 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 10/203:30 pm -
2 stops23h 50m
Fri 10/237:15 am -
1 stop9h 55m
Deal found 9/2![WestJet logo]()
$323
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 September 7, 2026.
Search for one-way flight options from San Diego to Ontario. Find affordable one-way fares based on user searches. Data last updated September 7, 2026.
This Mytrip deal was found by Cheapflights users on 9/4. 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 11/312:55 pm -
1 stop8h 30m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/4![Air Canada logo]()
$145
This Delta deal was found by Cheapflights users on 9/2. 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 10/2210:00 pm -
1 stop10h 57m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/2![Delta logo]()
$150
This United Airlines deal was found by Cheapflights users on 9/4. 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 11/69:45 pm -
1 stop14h 31m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/4![United Airlines logo]()
$151
This American Airlines deal was found by Cheapflights users on 9/3. 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 10/37:15 am -
2 stops12h 37m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/3![American Airlines logo]()
$154
This United Airlines deal was found by Cheapflights users on 9/2. 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 10/36:40 am -
1 stop7h 50m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/2![United Airlines logo]()
$155
This United Airlines deal was found by Cheapflights users on 9/4. 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 11/27:41 pm -
2 stops15h 19m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/4![United Airlines logo]()
$156
This United Airlines deal was found by Cheapflights users on 9/2. 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 10/1010:30 pm -
1 stop15h 46m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/2![United Airlines logo]()
$156
This Trip.com deal was found by Cheapflights users on 9/2. 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.
Sat 9/123:30 pm -
1 stop12h 35m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/2![WestJet logo]()
$157
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.
Sat 10/171:10 pm -
1 stop8h 21m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/7![Air Canada logo]()
$158
This Jetabroad deal was found by Cheapflights users on 9/3. 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 Jetabroad is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/163:30 pm -
1 stop12h 35m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/3![WestJet logo]()
$159
This Flightnetwork 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/121:10 pm -
1 stop8h 21m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/5![Air Canada logo]()
$160
This Justfly.com deal was found by Cheapflights users on 9/2. 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.
Sun 9/133:30 pm -
1 stop12h 35m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/2![WestJet logo]()
$162
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 September 7, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $289 (Kiwi.com) |
One-way from | $145 (Mytrip) |
Popular in | October |
Cheapest in | January |
Average price | $589 |
Good round-trip deal | $674 or less |
Good one-way deal | $295 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 7,457,451 searches. Data last updated September 7, 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 DiegoMontreal
SAN San Diego - YUL Montreal Pierre Elliott Trudeau Intl
SANYUL
San Diego
Fri 10/23
9:45 pm-1:39 pm
1 stop12h 54m
Montreal Pierre Elliott Trudeau Intl
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$150
San DiegoMontreal
SAN San Diego - YUL Montreal Pierre Elliott Trudeau Intl
SANYUL
San Diego
Wed 11/4
9:45 pm-3:16 pm
1 stop14h 31m
Montreal Pierre Elliott Trudeau Intl
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$151
San DiegoMontreal
SAN San Diego - YUL Montreal Pierre Elliott Trudeau Intl
SANYUL
San Diego
Fri 11/6
9:45 pm-3:16 pm
1 stop14h 31m
Montreal Pierre Elliott Trudeau Intl
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$151
San DiegoMontreal
SAN San Diego - YUL Montreal Pierre Elliott Trudeau Intl
SANYUL
San Diego
Sat 10/3
7:00 am-9:26 pm
2 stops11h 26m
Montreal Pierre Elliott Trudeau Intl
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$155
San DiegoOttawa
SAN San Diego - YOW Ottawa
SANYOW
San Diego
Sat 10/10
10:30 pm-5:16 pm
1 stop15h 46m
Ottawa
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$156
San DiegoMontreal
SAN San Diego - YUL Montreal Pierre Elliott Trudeau Intl
SANYUL
San Diego
Fri 11/6
11:31 am-11:25 pm
1 stop8h 54m
Montreal Pierre Elliott Trudeau Intl
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$157
San DiegoMontreal
SAN San Diego - YUL Montreal Pierre Elliott Trudeau Intl
SANYUL
San Diego
Sat 11/7
4:01 pm-2:00 pm
2 stops18h 59m
Montreal Pierre Elliott Trudeau Intl
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$157
San DiegoMontreal
SAN San Diego - YUL Montreal Pierre Elliott Trudeau Intl
SANYUL
San Diego
Tue 10/20
6:28 pm-10:40 am
2 stops13h 12m
Montreal Pierre Elliott Trudeau Intl
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$161
San DiegoMontreal
SAN San Diego - YUL Montreal Pierre Elliott Trudeau Intl
SANYUL
San Diego
Fri 10/30
7:41 pm-2:00 pm
2 stops15h 19m
Montreal Pierre Elliott Trudeau Intl
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$161
San DiegoMontreal
SAN San Diego - YUL Montreal Pierre Elliott Trudeau Intl
SANYUL
San Diego
Tue 9/15
7:00 am-3:27 pm
Nonstop5h 27m
Montreal Pierre Elliott Trudeau Intl
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$166
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-YXU
SAN-YUL
SAN-YOW
SAN-YQT
SAN-YYZ
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-YXU
SAN-YUL
SAN-YOW
SAN-YQT
What is the cheapest month to book a flight from San Diego to Region of Ontario?
Currently, March is the cheapest month in which you can book a flight from San Diego to Region of Ontario (average of $434). Flying from San Diego to Region of Ontario in August is currently the most expensive (average of $672). 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 September 7, 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?
Airfare is below average for this route at the moment.
San Diego to Region of Ontario flights typically cost between $479 and $815 in September.The cheapest round-trip price found within the last 5 days was $346 on WestJet (Sep 30-Oct 3).
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 75 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.
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 September 7, 2026.
See what other customers who have flown with Delta,United Airlines, andQatar Airways 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.
Comfort
7.8
Overall
7.8
Food
7.2
Crew
8.5
Boarding
8.1
Entertainment
7.8
Reviews
1 / 20
10.0
ExcellentAaron,Oct 2024
LAX - LHR
Comfort
7.8
Overall
7.8
Food
7.2
Crew
8.5
Boarding
8.1
Entertainment
7.8
Reviews
1 / 20
10.0
ExcellentAaron,Oct 2024
LAX - LHR
Comfort
7.8
Overall
7.8
Food
7.2
Crew
8.5
Boarding
8.1
Entertainment
7.8
Reviews
1 / 20
10.0
ExcellentAaron,Oct 2024
LAX - LHR
Comfort
7.8
Overall
7.8
Food
7.2
Crew
8.5
Boarding
8.1
Entertainment
7.8
Reviews
1 / 20
10.0
ExcellentAaron,Oct 2024
LAX - LHR
Comfort
7.8
Overall
7.8
Food
7.2
Crew
8.5
Boarding
8.1
Entertainment
7.8
Reviews
1 / 20
10.0
ExcellentAaron,Oct 2024
LAX - LHR
Comfort
7.8
Overall
7.8
Food
7.2
Crew
8.5
Boarding
8.1
Entertainment
7.8
Reviews
1 / 20
10.0
ExcellentAaron,Oct 2024
LAX - LHR
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
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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 September 7, 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 7,457,451 searches. Data last updated September 7, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$170 | Average$327 | FlexibilityNo cancel fee | On-time60% | |
| Cheapest$212 | Average$536 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$233 | Average$627 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$236 | Average$581 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$418 | Average$606 | FlexibilityNo cancel fee | On-time71% |