$120+ Cheap flights from San Francisco (SFO) 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 10/6. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — YYZ
Oct 10 — Oct 171
Round-trip
1 adult, Economy
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Find cheap flights from San Francisco 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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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 San Francisco to Ontario
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Cheapest flights from San Francisco to OntarioExplore the most affordable flight options available from San Francisco to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 10, 2026.
Explore the most affordable flight options available from San Francisco to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 10, 2026.
This Kiwi.com deal was found by Cheapflights users on 9/6. 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.
Sun 10/186:00 am -
1 stop8h 15m
Thu 10/2212:25 pm -
2 stops12h 30m
Deal found 9/6![WestJet logo]()
$268
This Trip.com deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/86:00 am -
1 stop8h 15m
Thu 10/1512:25 pm -
2 stops12h 30m
Deal found 9/9![WestJet logo]()
$278
This Justfly.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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/66:00 am -
1 stop8h 15m
Tue 10/138:15 pm -
1 stop28h 40m
Deal found 9/5![WestJet logo]()
$292
This Kiwi.com deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/196:00 am -
1 stop8h 15m
Wed 10/287:00 am -
1 stop8h 45m
Deal found 9/9![Multiple Airlines logo]()
$297
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 10/66:00 am -
1 stop8h 15m
Thu 10/1512:25 pm -
2 stops12h 30m
Deal found 9/5![WestJet logo]()
$299
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 10/66:00 am -
1 stop8h 15m
Wed 10/147:20 am -
1 stop17h 35m
Deal found 9/5![WestJet logo]()
$302
This FlightHub deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/26:00 am -
1 stop10h 20m
Wed 10/77:20 am -
1 stop17h 35m
Deal found 9/10![WestJet logo]()
$303
This Trip.com deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/186:00 am -
1 stop8h 15m
Fri 10/238:15 pm -
1 stop18h 45m
Deal found 9/9![WestJet logo]()
$304
This FlightHub 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/296:00 am -
1 stop8h 15m
Tue 10/66:10 pm -
1 stop20h 50m
Deal found 9/7![WestJet logo]()
$347
This Justfly.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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/156:00 am -
1 stop8h 15m
Tue 10/66:10 pm -
1 stop20h 50m
Deal found 9/5![WestJet logo]()
$350
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.
Sat 9/191:00 pm -
2 stops13h 10m
Sun 9/279:45 am -
Nonstop5h 30m
Deal found 9/5![Multiple Airlines logo]()
$352
This Kiwi.com deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/206:00 am -
2 stops10h 35m
Sun 10/259:50 am -
Nonstop5h 55m
Deal found 9/9![Multiple Airlines logo]()
$353
Best flights from San Francisco to OntarioDiscover carefully curated flight deals from San Francisco to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 10, 2026.
Discover carefully curated flight deals from San Francisco to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 10, 2026.
This Trip.com deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/186:00 am -
1 stop8h 15m
Fri 10/238:15 pm -
1 stop18h 45m
Deal found 9/9![WestJet logo]()
$304
This Air Canada deal was found by Cheapflights users on 9/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/201:35 pm -
1 stop16h 47m
Tue 10/2710:35 am -
2 stops13h 58m
Deal found 9/5![Air Canada logo]()
$373
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 10/131:00 pm -
1 stop13h 20m
Mon 10/267:40 am -
2 stops32h 11m
Deal found 9/5![Multiple Airlines logo]()
$375
This Porter 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 Porter Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/211:20 pm -
1 stop8h 05m
Wed 10/287:00 am -
1 stop8h 45m
Deal found 9/6![Porter Airlines logo]()
$428
This Delta deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/2811:45 am -
1 stop8h 44m
Mon 11/26:28 pm -
1 stop9h 47m
Deal found 9/8![Delta logo]()
$464
This Alaska Airlines deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/286:35 pm -
2 stops18h 30m
Sat 10/315:15 pm -
2 stops19h 45m
Deal found 9/9![Alaska Airlines logo]()
$483
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.
Wed 10/1412:45 am -
1 stop10h 39m
Thu 10/155:16 pm -
Nonstop5h 36m
Deal found 9/5![United Airlines logo]()
$523
This FlightHub deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/26:00 am -
1 stop10h 20m
Wed 10/76:55 am -
2 stops18h 00m
Deal found 9/10![WestJet logo]()
$327
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.
Tue 9/298:30 am -
1 stop7h 32m
Thu 10/17:45 pm -
2 stops22h 36m
Deal found 9/7![Air Canada logo]()
$387
This Trip.com deal was found by Cheapflights users on 9/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/226:00 am -
1 stop7h 45m
Thu 10/297:40 am -
1 stop12h 10m
Deal found 9/6![WestJet logo]()
$361
This Mytrip deal was found by Cheapflights users on 9/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/46:00 am -
1 stop8h 15m
Wed 10/146:05 am -
3 stops13h 35m
Deal found 9/6![Multiple Airlines logo]()
$421
This Air Canada deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/1310:51 pm -
1 stop7h 31m
Tue 10/2710:35 am -
2 stops13h 58m
Deal found 9/9![Air Canada logo]()
$400
This Kiwi.com deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/96:00 am -
1 stop30h 20m
Sun 10/187:20 am -
1 stop17h 35m
Deal found 9/9![WestJet logo]()
$365
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.
Thu 10/226:00 am -
1 stop7h 45m
Thu 10/297:40 am -
2 stops27h 39m
Deal found 9/6![Multiple Airlines logo]()
$435
This Alaska Airlines deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/2811:00 am -
1 stop26h 05m
Mon 11/25:15 pm -
2 stops18h 37m
Deal found 9/8![Alaska Airlines logo]()
$485
This Air Canada deal was found by Cheapflights users on 9/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/207:30 pm -
2 stops19h 13m
Thu 10/228:20 pm -
2 stops22h 01m
Deal found 9/5![Air Canada logo]()
$411
This Delta deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/88:01 am -
2 stops13h 43m
Sat 12/125:30 am -
2 stops12h 03m
Deal found 9/9![Delta logo]()
$500
This FlightHub deal was found by Cheapflights users on 9/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/306:00 am -
1 stop10h 50m
Sun 10/48:40 pm -
1 stop18h 20m
Deal found 9/6![WestJet logo]()
$376
This Porter 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 Porter Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/221:20 pm -
1 stop8h 05m
Thu 10/297:00 am -
1 stop8h 45m
Deal found 9/7![Porter Airlines logo]()
$512
This United Airlines deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/238:10 am -
Nonstop4h 58m
Sat 11/286:30 am -
Nonstop5h 59m
Deal found 9/9![United Airlines logo]()
$538
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/26:45 pm -
2 stops17h 35m
Mon 10/58:15 pm -
1 stop18h 45m
Deal found 9/7![Multiple Airlines logo]()
$450
This FlightHub deal was found by Cheapflights users on 9/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/306:00 am -
1 stop10h 50m
Mon 10/58:40 pm -
1 stop18h 20m
Deal found 9/5![WestJet logo]()
$376
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 11/174:46 pm -
2 stops20h 19m
Fri 11/205:15 pm -
2 stops18h 37m
Deal found 9/7![Alaska Airlines logo]()
$501
This United Airlines deal was found by Cheapflights users on 9/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/1612:45 am -
1 stop10h 39m
Sat 10/175:45 pm -
1 stop9h 45m
Deal found 9/5![United Airlines logo]()
$539
This Delta deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/229:55 pm -
2 stops16h 40m
Fri 9/256:55 am -
2 stops17h 44m
Deal found 9/9![Delta logo]()
$542
This Mytrip deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/306:00 am -
2 stops10h 29m
Fri 10/26:05 am -
3 stops18h 50m
Deal found 9/9![Multiple Airlines logo]()
$453
This oojo 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/156:00 am -
1 stop10h 20m
Fri 10/238:15 pm -
1 stop18h 45m
Deal found 9/6![WestJet logo]()
$376
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.
Sat 10/313:31 pm -
2 stops22h 34m
Tue 11/35:15 pm -
2 stops18h 45m
Deal found 9/7![Alaska Airlines logo]()
$501
This Delta deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/236:35 am -
2 stops14h 45m
Sat 9/266:55 am -
2 stops14h 18m
Deal found 9/8![Delta logo]()
$542
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.
Tue 10/136:00 am -
1 stop8h 15m
Mon 10/196:10 pm -
1 stop20h 50m
Deal found 9/6![WestJet logo]()
$381
Last-minute flights from San Francisco to OntarioDiscover last-minute flight deals from San Francisco to Ontario. Data last updated September 10, 2026 and is based on user searches.
Discover last-minute flight deals from San Francisco to Ontario. Data last updated September 10, 2026 and is based on user searches.
This Justfly.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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/156:00 am -
1 stop8h 15m
Tue 10/66:10 pm -
1 stop20h 50m
Deal found 9/5![WestJet logo]()
$350
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.
Sat 9/191:00 pm -
2 stops13h 10m
Sun 9/279:45 am -
Nonstop5h 30m
Deal found 9/5![Multiple Airlines logo]()
$352
This FlightHub 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/296:00 am -
1 stop8h 15m
Tue 10/66:10 pm -
1 stop20h 50m
Deal found 9/7![WestJet logo]()
$347
This FlightHub deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/26:00 am -
1 stop10h 20m
Wed 10/77:20 am -
1 stop17h 35m
Deal found 9/10![WestJet logo]()
$303
This Justfly.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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/66:00 am -
1 stop8h 15m
Tue 10/138:15 pm -
1 stop28h 40m
Deal found 9/5![WestJet logo]()
$292
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 10/66:00 am -
1 stop8h 15m
Thu 10/1512:25 pm -
2 stops12h 30m
Deal found 9/5![WestJet logo]()
$299
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 10/66:00 am -
1 stop8h 15m
Wed 10/147:20 am -
1 stop17h 35m
Deal found 9/5![WestJet logo]()
$302
This Trip.com deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/86:00 am -
1 stop8h 15m
Thu 10/1512:25 pm -
2 stops12h 30m
Deal found 9/9![WestJet logo]()
$278
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.
Sun 10/186:00 am -
1 stop8h 15m
Thu 10/2212:25 pm -
2 stops12h 30m
Deal found 9/6![WestJet logo]()
$268
This Trip.com deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/186:00 am -
1 stop8h 15m
Fri 10/238:15 pm -
1 stop18h 45m
Deal found 9/9![WestJet logo]()
$304
This Kiwi.com deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/196:00 am -
1 stop8h 15m
Wed 10/287:00 am -
1 stop8h 45m
Deal found 9/9![Multiple Airlines logo]()
$297
This Kiwi.com deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/206:00 am -
2 stops10h 35m
Sun 10/259:50 am -
Nonstop5h 55m
Deal found 9/9![Multiple Airlines logo]()
$353
One-way flights from San Francisco to OntarioSearch for one-way flight options from San Francisco to Ontario. Find affordable one-way fares based on user searches. Data last updated September 10, 2026.
Search for one-way flight options from San Francisco to Ontario. Find affordable one-way fares based on user searches. Data last updated September 10, 2026.
This Trip.com deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/66:00 am -
1 stop10h 20m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/9![WestJet logo]()
$120
This Trip.com deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/56:00 am -
1 stop10h 20m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/8![WestJet logo]()
$121
This Kiwi.com deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/54:21 pm -
2 stops34h 14m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/8![Multiple Airlines logo]()
$136
This Mytrip deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/236:00 am -
1 stop8h 15m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/8![WestJet logo]()
$140
This Trip.com deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/296:00 am -
1 stop8h 15m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/9![WestJet logo]()
$143
This Trip.com deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/101:00 pm -
1 stop13h 35m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/9![WestJet logo]()
$143
This Trip.com deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/276:00 am -
1 stop8h 15m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/8![WestJet logo]()
$145
This Kiwi.com deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/146:05 pm -
2 stops15h 25m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![WestJet logo]()
$145
This Kiwi.com deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/64:21 pm -
3 stops58h 14m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/9![Multiple Airlines logo]()
$146
This CheapOair deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/46:00 am -
1 stop8h 15m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/8![WestJet logo]()
$147
This Jetabroad deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Jetabroad is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/236:00 am -
1 stop8h 15m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/8![WestJet logo]()
$148
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.
Sun 10/186:00 am -
2 stops15h 20m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/5![WestJet logo]()
$148
Find flight deals from San Francisco to Ontario
Keep the following information in mind while searching for San Francisco to Ontario flight deals. Data was last updated September 10, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $268 (Kiwi.com) |
One-way from | $120 (Trip.com) |
Popular in | December |
Cheapest in | January |
Average price | $544 |
Good round-trip deal | $492 or less |
Good one-way deal | $266 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from San Francisco 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 10, 2026.
Use the filters below to find and compare flights from San Francisco to Ontario that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
San FranciscoHamilton
SFO San Francisco - YHM Hamilton
SFOYHM
San Francisco
Fri 10/23
6:00 am-5:15 pm
1 stop8h 15m
Hamilton
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$140
San FranciscoOttawa
SFO San Francisco - YOW Ottawa
SFOYOW
San Francisco
Tue 10/6
4:21 pm-5:35 am
3 stops58h 14m
Ottawa
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$146
San FranciscoOttawa
SFO San Francisco - YOW Ottawa
SFOYOW
San Francisco
Sun 10/18
6:00 am-12:20 am
2 stops15h 20m
Ottawa
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$148
San FranciscoOttawa
SFO San Francisco - YOW Ottawa
SFOYOW
San Francisco
Mon 10/5
6:00 am-3:20 pm
1 stop30h 20m
Ottawa
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$154
San FranciscoOttawa
SFO San Francisco - YOW Ottawa
SFOYOW
San Francisco
Sun 10/4
10:24 pm-5:35 am
3 stops28h 11m
Ottawa
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$156
San FranciscoHamilton
SFO San Francisco - YHM Hamilton
SFOYHM
San Francisco
Thu 10/22
6:00 am-5:15 pm
1 stop8h 15m
Hamilton
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$163
San FranciscoWindsor
SFO San Francisco - YQG Windsor
SFOYQG
San Francisco
Wed 9/30
4:40 pm-9:22 am
1 stop13h 42m
Windsor
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$164
San FranciscoHamilton
SFO San Francisco - YHM Hamilton
SFOYHM
San Francisco
Fri 10/9
6:00 am-5:15 pm
1 stop8h 15m
Hamilton
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$164
San FranciscoWindsor
SFO San Francisco - YQG Windsor
SFOYQG
San Francisco
Fri 9/25
6:00 am-3:10 pm
1 stop30h 10m
Windsor
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$169
San FranciscoToronto
SFO San Francisco - YKF Toronto Region of Waterloo Intl
SFOYKF
San Francisco
Wed 9/30
6:00 am-7:50 pm
1 stop10h 50m
Toronto Region of Waterloo Intl
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$175
Showing 1-10 of 60 resultsSorted by cheapest first
Best time to book a flight from San Francisco to Ontario
Have a flexible travel schedule? Discover the best time to fly to Ontario from San Francisco with our price prediction graph.
SFO-YOW
SFO-YHM
SFO-YYZ
SFO-YQG
SFO-YXU
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 Francisco to Ontario
SFO-CAON
SFO-YOW
SFO-YHM
SFO-YYZ
SFO-YQG
What is the cheapest month to book a flight from San Francisco to Region of Ontario?
Currently, January is the cheapest month in which you can book a flight from San Francisco to Region of Ontario (average of $392). Flying from San Francisco to Region of Ontario in December is currently the most expensive (average of $624). 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 SFO to ON?
Find hourly flight availability from San Francisco 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 10, 2026.
One of the essential ways to save on airfare from San Francisco to Region of Ontario is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight at noon could potentially save you up to 28% on airfare.
Weekly flight availability from San Francisco to Region of Ontario
Explore weekly flight availability from San Francisco to Ontario. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated September 10, 2026.
The most flights from SFO to CAON are scheduled on a Wednesday (28 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (18 on average).
How much does it cost to fly round-trip from San Francisco to Region of Ontario?
Airfare is below average for this route at the moment.
San Francisco to Region of Ontario flights typically cost between $410 and $651 in October.The cheapest round-trip price found within the last 5 days was $352 on Multiple Airlines (Oct 29-Nov 2).
How far ahead should I book a flight from San Francisco to Region of Ontario?
The price you pay for your flight from San Francisco to Region of Ontario may vary depending on when you book. For the best chance of a lower fare, look to book 44 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.
What is the cheapest day to fly from San Francisco to Region of Ontario?
Use this chart to determine the cheapest time to fly round-trip from San Francisco to Ontario. Price data was last updated on September 5, 2026.
Travelers seeking maximum savings on their San Francisco to Region of Ontario flight should consider departing on Wednesday afternoons when fares are most often at their lowest. Sunday mornings flights should be avoided if possible as fares are typically the most expensive at this time.
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 10, 2026.
Peruse reviews from past customers who have flown with Porter Airlines,Delta, andUnited Airlines from San Francisco to Ontario to help guide your decision. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Boarding
8.2
Crew
8.6
Entertainment
6.9
Food
7.6
Comfort
8.0
Overall
8.0
Reviews
1 / 20
6.0
GoodShannon,Jul 2026
YQT - YOW
Boarding
8.2
Crew
8.6
Entertainment
6.9
Food
7.6
Comfort
8.0
Overall
8.0
Reviews
1 / 20
6.0
GoodShannon,Jul 2026
YQT - YOW
Boarding
8.2
Crew
8.6
Entertainment
6.9
Food
7.6
Comfort
8.0
Overall
8.0
Reviews
1 / 20
6.0
GoodShannon,Jul 2026
YQT - YOW
Boarding
8.2
Crew
8.6
Entertainment
6.9
Food
7.6
Comfort
8.0
Overall
8.0
Reviews
1 / 20
6.0
GoodShannon,Jul 2026
YQT - YOW
Boarding
8.2
Crew
8.6
Entertainment
6.9
Food
7.6
Comfort
8.0
Overall
8.0
Reviews
1 / 20
6.0
GoodShannon,Jul 2026
YQT - YOW
Boarding
8.2
Crew
8.6
Entertainment
6.9
Food
7.6
Comfort
8.0
Overall
8.0
Reviews
1 / 20
6.0
GoodShannon,Jul 2026
YQT - YOW
Related info for your journey
Find useful and relevant information for your journey from San Francisco 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 Francisco 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 Francisco to Ontario by cabin class
Find flights from San Francisco to Ontario, based on your preferred cabin class, be it economy, premium economy, business, or first class.
San Francisco and Ontario flights
Browse other San Francisco and Ontario flight options. Last updated on September 10, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
San Francisco to Ontario flights
Consider these flights traveling from San Francisco to Ontario.
Top 8 airlines flying from San Francisco to Ontario
Discover the top 8 airlines that operate flights from San Francisco 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 10, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$157 | Average$477 | FlexibilityNo cancel fee | On-time60% | |
| Cheapest$160 | Average$490 | FlexibilityNo cancel fee | On-time50% | |
| Cheapest$162 | Average$475 | FlexibilityNo cancel fee | On-time52% | |
| Cheapest$202 | Average$428 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$216 | Average$659 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$338 | Average$404 | FlexibilityNo cancel fee | On-time68% | |
| Cheapest$402 | Average$768 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$448 | Average$621 | FlexibilityNo cancel fee | On-time71% |