$173+ Cheap flights from San Francisco (SFO) 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 7/21. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — YYZ
Jul 11 — Jul 181
Round-trip
1 adult, Economy
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Find cheap flights from San Francisco to Ontario with Cheapflights
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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 June 11, 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 June 11, 2026.
This FlightHub deal was found by Cheapflights users on 6/9. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/76:00 am
SFO
- YQT
2 stops9h 45m
WestJet
Wed 8/1911:00 am
YQT
- SFO
2 stops13h 55m
WestJet
Deal found 6/9![WestJet logo]()
$331
This Booking.com deal was found by Cheapflights users on 6/7. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/266:00 am
SFO
- YQT
2 stops9h 45m
WestJet
Sat 9/511:00 am
YQT
- SFO
2 stops13h 55m
WestJet
Deal found 6/7![WestJet logo]()
$332
This FlightHub deal was found by Cheapflights users on 6/10. 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.
Thu 9/246:00 am
SFO
- YQT
2 stops9h 45m
WestJet
Thu 10/111:00 am
YQT
- SFO
2 stops13h 55m
WestJet
Deal found 6/10![WestJet logo]()
$335
This FlightHub deal was found by Cheapflights users on 6/10. 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.
Thu 9/246:00 am
SFO
- YQT
2 stops9h 45m
Multiple Airlines
Thu 10/16:30 am
YQT
- SFO
1 stop8h 50m
Multiple Airlines
Deal found 6/10![Multiple Airlines logo]()
$337
This Kiwi.com deal was found by Cheapflights users on 6/9. 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 7/76:00 am
SFO
- YQT
2 stops9h 45m
WestJet
Fri 8/217:50 pm
YQT
- SFO
1 stop19h 10m
WestJet
Deal found 6/9![WestJet logo]()
$347
This Kiwi.com deal was found by Cheapflights users on 6/9. 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.
Wed 7/151:20 pm
SFO
- YYZ
Nonstop5h 05m
Multiple Airlines
Thu 7/2312:00 pm
YYZ
- SFO
2 stops12h 55m
Multiple Airlines
Deal found 6/9![Multiple Airlines logo]()
$356
This FlightHub deal was found by Cheapflights users on 6/9. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/76:00 am
SFO
- YQT
2 stops9h 45m
WestJet
Mon 8/177:50 pm
YQT
- SFO
1 stop29h 05m
WestJet
Deal found 6/9![WestJet logo]()
$356
This Kiwi.com deal was found by Cheapflights users on 6/9. 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.
Wed 7/151:20 pm
SFO
- YYZ
Nonstop5h 05m
Multiple Airlines
Fri 7/248:00 am
YYZ
- SFO
2 stops11h 40m
Multiple Airlines
Deal found 6/9![Multiple Airlines logo]()
$357
This Kiwi.com deal was found by Cheapflights users on 6/10. 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.
Sun 7/196:00 am
SFO
- YYZ
2 stops12h 10m
WestJet
Fri 7/246:00 am
YYZ
- SFO
1 stop9h 00m
WestJet
Deal found 6/10![WestJet logo]()
$358
This Kiwi.com deal was found by Cheapflights users on 6/9. 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 7/131:20 pm
SFO
- YYZ
Nonstop5h 05m
Multiple Airlines
Fri 7/248:00 am
YYZ
- SFO
2 stops11h 40m
Multiple Airlines
Deal found 6/9![Multiple Airlines logo]()
$359
This Kiwi.com deal was found by Cheapflights users on 6/10. 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.
Tue 7/146:00 am
SFO
- YYZ
2 stops10h 55m
WestJet
Fri 7/246:00 am
YYZ
- SFO
1 stop9h 00m
WestJet
Deal found 6/10![WestJet logo]()
$360
This FlightHub deal was found by Cheapflights users on 6/9. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/86:05 pm
SFO
- YQT
1 stop21h 55m
WestJet
Wed 8/1911:00 am
YQT
- SFO
2 stops13h 55m
WestJet
Deal found 6/9![WestJet logo]()
$360
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 June 11, 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 June 11, 2026.
This Booking.com deal was found by Cheapflights users on 6/7. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/276:00 am
SFO
- YQT
1 stop10h 00m
WestJet
Sun 9/611:00 am
YQT
- SFO
2 stops13h 55m
WestJet
Deal found 6/7![WestJet logo]()
$362
This United Airlines deal was found by Cheapflights users on 6/9. 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.
Fri 7/36:34 pm
SFO
- YQT
2 stops19h 55m
United Airlines
Sat 7/115:10 am
YQT
- SFO
2 stops21h 55m
United Airlines
Deal found 6/9![United Airlines logo]()
$411
This Air Canada deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/178:30 am
SFO
- YQG
1 stop7h 37m
Air Canada
Wed 10/214:05 pm
YQG
- SFO
1 stop7h 54m
Air Canada
Deal found 6/10![Air Canada logo]()
$460
This Mytrip deal was found by Cheapflights users on 6/6. 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.
Fri 8/216:00 am
SFO
- YKF
1 stop10h 50m
Multiple Airlines
Tue 8/257:05 pm
YKF
- SFO
2 stops24h 35m
Multiple Airlines
Deal found 6/6![Multiple Airlines logo]()
$496
This Delta deal was found by Cheapflights users on 6/7. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/1912:35 am
SFO
- YYZ
1 stop7h 59m
Delta
Mon 7/275:45 pm
YYZ
- SFO
1 stop9h 07m
Delta
Deal found 6/7![Delta logo]()
$506
This Porter Airlines deal was found by Cheapflights users on 6/6. 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.
Fri 10/301:40 pm
SFO
- YOW
1 stop7h 59m
Porter Airlines
Mon 11/26:45 am
YOW
- SFO
1 stop8h 55m
Porter Airlines
Deal found 6/6![Porter Airlines logo]()
$562
This United Airlines deal was found by Cheapflights users on 6/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/2412:55 am
SFO
- YQT
2 stops19h 34m
United Airlines
Wed 8/265:10 am
YQT
- SFO
2 stops15h 25m
United Airlines
Deal found 6/8![United Airlines logo]()
$411
This Trip.com deal was found by Cheapflights users on 6/10. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/226:00 am
SFO
- YKF
1 stop10h 50m
WestJet
Sat 8/298:40 pm
YKF
- SFO
1 stop18h 20m
WestJet
Deal found 6/10![WestJet logo]()
$412
This United Airlines deal was found by Cheapflights users on 6/9. 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 7/610:38 pm
SFO
- YQT
2 stops15h 51m
United Airlines
Tue 7/1411:20 am
YQT
- SFO
2 stops12h 58m
United Airlines
Deal found 6/9![United Airlines logo]()
$411
This WestJet deal was found by Cheapflights users on 6/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure WestJet is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/256:00 am
SFO
- YQT
2 stops9h 45m
WestJet
Wed 8/2611:00 am
YQT
- SFO
2 stops13h 55m
WestJet
Deal found 6/6![WestJet logo]()
$413
This Air Canada deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/1311:35 am
SFO
- YXU
1 stop7h 05m
Air Canada
Thu 10/155:40 am
YXU
- SFO
1 stop9h 54m
Air Canada
Deal found 6/10![Air Canada logo]()
$467
This Mytrip deal was found by Cheapflights users on 6/10. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/46:00 am
SFO
- YHM
1 stop8h 15m
Multiple Airlines
Mon 8/107:00 am
YHM
- SFO
3 stops32h 00m
Multiple Airlines
Deal found 6/10![Multiple Airlines logo]()
$496
This United Airlines deal was found by Cheapflights users on 6/9. 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 7/612:50 am
SFO
- YQT
2 stops13h 39m
United Airlines
Fri 7/176:25 pm
YQT
- SFO
1 stop17h 44m
United Airlines
Deal found 6/9![United Airlines logo]()
$420
This Booking.com deal was found by Cheapflights users on 6/6. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/286:00 am
SFO
- YHM
1 stop8h 15m
WestJet
Tue 9/16:10 pm
YHM
- SFO
1 stop20h 50m
WestJet
Deal found 6/6![WestJet logo]()
$421
This Delta deal was found by Cheapflights users on 6/8. 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.
Fri 9/410:00 pm
SFO
- YYZ
1 stop11h 23m
Delta
Mon 9/76:00 am
YYZ
- SFO
1 stop12h 51m
Delta
Deal found 6/8![Delta logo]()
$538
This Kiwi.com deal was found by Cheapflights users on 6/10. 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 7/151:20 pm
SFO
- YOW
1 stop8h 05m
Multiple Airlines
Sun 7/191:20 pm
YOW
- SFO
2 stops22h 28m
Multiple Airlines
Deal found 6/10![Multiple Airlines logo]()
$522
This Booking.com deal was found by Cheapflights users on 6/7. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/56:00 am
SFO
- YKF
1 stop10h 50m
WestJet
Wed 8/128:40 pm
YKF
- SFO
1 stop23h 00m
WestJet
Deal found 6/7![WestJet logo]()
$432
This Air Canada deal was found by Cheapflights users on 6/6. 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 10/138:30 am
SFO
- YQG
1 stop7h 37m
Air Canada
Sat 10/174:05 pm
YQG
- SFO
1 stop7h 54m
Air Canada
Deal found 6/6![Air Canada logo]()
$525
This United Airlines deal was found by Cheapflights users on 6/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/710:47 pm
SFO
- YQT
1 stop15h 42m
United Airlines
Thu 7/165:10 am
YQT
- SFO
1 stop17h 45m
United Airlines
Deal found 6/8![United Airlines logo]()
$435
This Delta deal was found by Cheapflights users on 6/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/310:55 pm
SFO
- YYZ
1 stop11h 39m
Delta
Mon 7/1312:09 pm
YYZ
- SFO
1 stop11h 46m
Delta
Deal found 6/6![Delta logo]()
$550
This oojo deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/166:00 am
SFO
- YXU
1 stop7h 45m
WestJet
Thu 7/235:55 pm
YXU
- SFO
1 stop25h 45m
WestJet
Deal found 6/9![WestJet logo]()
$443
This United Airlines deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/911:30 pm
SFO
- YYZ
1 stop7h 24m
United Airlines
Tue 8/116:30 am
YYZ
- SFO
Nonstop5h 38m
United Airlines
Deal found 6/10![United Airlines logo]()
$448
This Mytrip deal was found by Cheapflights users on 6/10. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/61:00 pm
SFO
- YOW
2 stops20h 30m
Multiple Airlines
Tue 7/288:55 am
YOW
- SFO
2 stops16h 00m
Multiple Airlines
Deal found 6/10![Multiple Airlines logo]()
$557
This WestJet deal was found by Cheapflights users on 6/10. 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 WestJet is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/171:00 pm
SFO
- YQT
2 stops26h 45m
WestJet
Tue 10/207:20 pm
YQT
- SFO
2 stops24h 20m
WestJet
Deal found 6/10![WestJet logo]()
$443
This Delta deal was found by Cheapflights users on 6/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/146:00 am
SFO
- YOW
1 stop10h 20m
Delta
Fri 7/316:55 am
YOW
- SFO
2 stops18h 54m
Delta
Deal found 6/10![Delta logo]()
$626
This Air Canada deal was found by Cheapflights users on 6/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/710:47 pm
SFO
- YQG
1 stop7h 35m
Air Canada
Mon 7/137:45 pm
YQG
- SFO
1 stop16h 24m
Air Canada
Deal found 6/8![Air Canada logo]()
$642
This United deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/2910:35 pm
SFO
- YTZ
1 stop8h 31m
Multiple Airlines
Mon 9/78:30 pm
YTZ
- SFO
1 stop17h 47m
Multiple Airlines
Deal found 6/10![Multiple Airlines logo]()
$608
This FlightHub deal was found by Cheapflights users on 6/10. 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 8/216:00 am
SFO
- YHM
1 stop8h 15m
WestJet
Sat 8/296:10 pm
YHM
- SFO
1 stop25h 30m
WestJet
Deal found 6/10![WestJet logo]()
$457
This United Airlines deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/710:38 pm
SFO
- YTZ
1 stop8h 28m
United Airlines
Tue 8/1112:15 pm
YTZ
- SFO
1 stop9h 57m
United Airlines
Deal found 6/10![United Airlines logo]()
$509
This Air Canada deal was found by Cheapflights users on 6/6. 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.
Thu 8/610:47 pm
SFO
- YQG
1 stop7h 35m
Air Canada
Mon 8/177:45 pm
YQG
- SFO
1 stop16h 23m
Air Canada
Deal found 6/6![Air Canada logo]()
$642
Last-minute flights from San Francisco to OntarioDiscover last-minute flight deals from San Francisco to Ontario. Data last updated June 11, 2026 and is based on user searches.
Discover last-minute flight deals from San Francisco to Ontario. Data last updated June 11, 2026 and is based on user searches.
This FlightHub deal was found by Cheapflights users on 6/9. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/76:00 am
SFO
- YQT
2 stops9h 45m
WestJet
Wed 8/1911:00 am
YQT
- SFO
2 stops13h 55m
WestJet
Deal found 6/9![WestJet logo]()
$331
This Kiwi.com deal was found by Cheapflights users on 6/9. 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 7/76:00 am
SFO
- YQT
2 stops9h 45m
WestJet
Fri 8/217:50 pm
YQT
- SFO
1 stop19h 10m
WestJet
Deal found 6/9![WestJet logo]()
$347
This FlightHub deal was found by Cheapflights users on 6/9. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/76:00 am
SFO
- YQT
2 stops9h 45m
WestJet
Mon 8/177:50 pm
YQT
- SFO
1 stop29h 05m
WestJet
Deal found 6/9![WestJet logo]()
$356
This FlightHub deal was found by Cheapflights users on 6/9. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/86:05 pm
SFO
- YQT
1 stop21h 55m
WestJet
Wed 8/1911:00 am
YQT
- SFO
2 stops13h 55m
WestJet
Deal found 6/9![WestJet logo]()
$360
This Kiwi.com deal was found by Cheapflights users on 6/9. 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 7/131:20 pm
SFO
- YYZ
Nonstop5h 05m
Multiple Airlines
Fri 7/248:00 am
YYZ
- SFO
2 stops11h 40m
Multiple Airlines
Deal found 6/9![Multiple Airlines logo]()
$359
This Kiwi.com deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/136:00 am
SFO
- YYZ
2 stops10h 55m
WestJet
Wed 7/222:50 pm
YYZ
- SFO
1 stop10h 05m
WestJet
Deal found 6/10![WestJet logo]()
$364
This Kiwi.com deal was found by Cheapflights users on 6/10. 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.
Tue 7/146:00 am
SFO
- YYZ
2 stops10h 55m
WestJet
Fri 7/246:00 am
YYZ
- SFO
1 stop9h 00m
WestJet
Deal found 6/10![WestJet logo]()
$360
This Kiwi.com deal was found by Cheapflights users on 6/10. 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.
Tue 7/141:20 pm
SFO
- YYZ
Nonstop5h 05m
Multiple Airlines
Fri 7/249:00 am
YYZ
- SFO
1 stop10h 40m
Multiple Airlines
Deal found 6/10![Multiple Airlines logo]()
$361
This Kiwi.com deal was found by Cheapflights users on 6/9. 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 7/141:20 pm
SFO
- YYZ
Nonstop5h 05m
Multiple Airlines
Wed 7/222:50 pm
YYZ
- SFO
1 stop10h 05m
Multiple Airlines
Deal found 6/9![Multiple Airlines logo]()
$362
This Kiwi.com deal was found by Cheapflights users on 6/9. 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.
Wed 7/151:20 pm
SFO
- YYZ
Nonstop5h 05m
Multiple Airlines
Thu 7/2312:00 pm
YYZ
- SFO
2 stops12h 55m
Multiple Airlines
Deal found 6/9![Multiple Airlines logo]()
$356
This Kiwi.com deal was found by Cheapflights users on 6/9. 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.
Wed 7/151:20 pm
SFO
- YYZ
Nonstop5h 05m
Multiple Airlines
Wed 7/2212:40 pm
YYZ
- SFO
2 stops12h 15m
Multiple Airlines
Deal found 6/9![Multiple Airlines logo]()
$357
This Kiwi.com deal was found by Cheapflights users on 6/10. 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.
Sun 7/196:00 am
SFO
- YYZ
2 stops12h 10m
WestJet
Thu 7/239:00 am
YYZ
- SFO
1 stop10h 40m
WestJet
Deal found 6/10![WestJet logo]()
$358
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 June 11, 2026.
Search for one-way flight options from San Francisco to Ontario. Find affordable one-way fares based on user searches. Data last updated June 11, 2026.
This CheapOair deal was found by Cheapflights users on 6/8. 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.
Tue 7/216:00 am
SFO
- YHM
1 stop8h 15m
WestJet
Deal found 6/8![WestJet logo]()
$173
This CheapOair deal was found by Cheapflights users on 6/6. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/16:00 am
SFO
- YOW
1 stop10h 20m
WestJet
Deal found 6/6![WestJet logo]()
$173
This CheapOair deal was found by Cheapflights users on 6/6. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/146:00 am
SFO
- YHM
1 stop8h 15m
WestJet
Deal found 6/6![WestJet logo]()
$175
This CheapOair deal was found by Cheapflights users on 6/6. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/166:05 pm
SFO
- YOW
1 stop8h 30m
WestJet
Deal found 6/6![WestJet logo]()
$175
This Booking.com deal was found by Cheapflights users on 6/6. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/166:00 am
SFO
- YHM
1 stop8h 15m
WestJet
Deal found 6/6![WestJet logo]()
$176
This Justfly.com deal was found by Cheapflights users on 6/9. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/136:00 am
SFO
- YHM
1 stop8h 15m
WestJet
Deal found 6/9![WestJet logo]()
$177
This Justfly.com deal was found by Cheapflights users on 6/10. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/126:00 am
SFO
- YHM
1 stop8h 15m
WestJet
Deal found 6/10![WestJet logo]()
$178
This Justfly.com deal was found by Cheapflights users on 6/10. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/196:00 am
SFO
- YHM
1 stop8h 15m
WestJet
Deal found 6/10![WestJet logo]()
$180
This Trip.com deal was found by Cheapflights users on 6/9. 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 8/46:00 am
SFO
- YHM
1 stop8h 15m
WestJet
Deal found 6/9![WestJet logo]()
$181
This Justfly.com deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” 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 9/36:00 am
SFO
- YHM
1 stop8h 15m
WestJet
Deal found 6/11![WestJet logo]()
$183
This Gotogate deal was found by Cheapflights users on 6/6. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/176:00 am
SFO
- YYZ
2 stops12h 10m
WestJet
Deal found 6/6![WestJet logo]()
$184
This Booking.com deal was found by Cheapflights users on 6/6. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/76:05 pm
SFO
- YXU
1 stop8h 15m
WestJet
Deal found 6/6![WestJet logo]()
$185
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 June 11, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $331 (FlightHub) |
One-way from | $173 (CheapOair) |
Popular in | December |
Cheapest in | January |
Average price | $547 |
Good round-trip deal | $586 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 2,558,603 searches. Data last updated June 11, 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 FranciscoThunder Bay
SFO - YQT
SFOYQT
San Francisco
Thu 8/27
6:00 am-7:00 pm
1 stop10h 00m
Thunder Bay
Sun 9/6
11:00 am-9:55 pm
2 stops13h 55m
$362
San FranciscoThunder Bay
SFO - YQT
SFOYQT
San Francisco
Fri 7/3
6:34 pm-5:29 pm
2 stops19h 55m
Thunder Bay
Sat 7/11
5:10 am-12:05 am
2 stops21h 55m
$411
San FranciscoThunder Bay
SFO - YQT
SFOYQT
San Francisco
Mon 8/24
12:55 am-11:29 pm
2 stops19h 34m
Thunder Bay
Wed 8/26
5:10 am-5:35 pm
2 stops15h 25m
$411
San FranciscoThunder Bay
SFO - YQT
SFOYQT
San Francisco
Mon 7/6
10:38 pm-5:29 pm
2 stops15h 51m
Thunder Bay
Tue 7/14
11:20 am-9:18 pm
2 stops12h 58m
$411
San FranciscoToronto
SFO - YKF
SFOYKF
San Francisco
Sat 8/22
6:00 am-7:50 pm
1 stop10h 50m
Toronto Region of Waterloo Intl
Sat 8/29
8:40 pm-12:00 pm
1 stop18h 20m
$412
San FranciscoThunder Bay
SFO - YQT
SFOYQT
San Francisco
Tue 8/25
6:00 am-6:45 pm
2 stops9h 45m
Thunder Bay
Wed 8/26
11:00 am-9:55 pm
2 stops13h 55m
$413
San FranciscoThunder Bay
SFO - YQT
SFOYQT
San Francisco
Mon 7/6
12:50 am-5:29 pm
2 stops13h 39m
Thunder Bay
Fri 7/17
6:25 pm-9:09 am
1 stop17h 44m
$420
San FranciscoHamilton
SFO - YHM
SFOYHM
San Francisco
Fri 8/28
6:00 am-5:15 pm
1 stop8h 15m
Hamilton
Tue 9/1
6:10 pm-12:00 pm
1 stop20h 50m
$421
San FranciscoToronto
SFO - YKF
SFOYKF
San Francisco
Wed 8/5
6:00 am-7:50 pm
1 stop10h 50m
Toronto Region of Waterloo Intl
Wed 8/12
8:40 pm-4:40 pm
1 stop23h 00m
$432
San FranciscoThunder Bay
SFO - YQT
SFOYQT
San Francisco
Tue 7/7
10:47 pm-5:29 pm
1 stop15h 42m
Thunder Bay
Thu 7/16
5:10 am-7:55 pm
1 stop17h 45m
$435
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-YQT
SFO-YYZ
SFO-YHM
SFO-YOW
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-YQT
SFO-YYZ
SFO-YHM
SFO-YOW
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 $134). Flying from San Francisco to Region of Ontario in October is currently the most expensive (average of $1,323). 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 June 11, 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 June 11, 2026.
The most flights from SFO to CAON are scheduled on a Wednesday (25 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (17 on average).
How much does it cost to fly round-trip from San Francisco to Region of Ontario?
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 80 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 June 8, 2026.
Travelers seeking maximum savings on their San Francisco to Region of Ontario flight should consider departing on Thursday at noon 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 June 11, 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.
Comfort
8.0
Entertainment
6.9
Overall
8.0
Crew
8.6
Boarding
8.2
Food
7.6
Reviews
1 / 20
6.0
GoodJustin,May 2026
YYZ - MCO
Comfort
8.0
Entertainment
6.9
Overall
8.0
Crew
8.6
Boarding
8.2
Food
7.6
Reviews
1 / 20
6.0
GoodJustin,May 2026
YYZ - MCO
Comfort
8.0
Entertainment
6.9
Overall
8.0
Crew
8.6
Boarding
8.2
Food
7.6
Reviews
1 / 20
6.0
GoodJustin,May 2026
YYZ - MCO
Comfort
8.0
Entertainment
6.9
Overall
8.0
Crew
8.6
Boarding
8.2
Food
7.6
Reviews
1 / 20
6.0
GoodJustin,May 2026
YYZ - MCO
Comfort
8.0
Entertainment
6.9
Overall
8.0
Crew
8.6
Boarding
8.2
Food
7.6
Reviews
1 / 20
6.0
GoodJustin,May 2026
YYZ - MCO
Comfort
8.0
Entertainment
6.9
Overall
8.0
Crew
8.6
Boarding
8.2
Food
7.6
Reviews
1 / 20
6.0
GoodJustin,May 2026
YYZ - MCO
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 June 11, 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 2,558,603 searches. Data last updated June 11, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$134 | Average$406 | FlexibilityNo cancel fee | On-time60% | |
| Cheapest$160 | Average$450 | FlexibilityNo cancel fee | On-time50% | |
| Cheapest$162 | Average$455 | FlexibilityNo cancel fee | On-time52% | |
| Cheapest$197 | Average$450 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$204 | Average$643 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$338 | Average$404 | FlexibilityNo cancel fee | On-time68% | |
| Cheapest$402 | Average$724 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$416 | Average$567 | FlexibilityNo cancel fee | On-time71% |