$153+ 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 5/8. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — YYZ
May 24 — May 311
Round-trip
1 adult, Economy
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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 April 24, 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 April 24, 2026.
This FlightHub deal was found by Cheapflights users on 4/19. Clicking the “Pick Dates” 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 9/16:00 am
SFO
- YQT
2 stops9h 45m
Multiple Airlines
Tue 9/86:30 am
YQT
- SFO
1 stop8h 50m
Multiple Airlines
Deal found 4/19![Multiple Airlines logo]()
$265
This Kiwi.com deal was found by Cheapflights users on 4/19. Clicking the “Pick Dates” 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 9/306:00 am
SFO
- YYZ
2 stops10h 00m
WestJet
Mon 10/56:15 am
YYZ
- SFO
1 stop8h 45m
WestJet
Deal found 4/19![WestJet logo]()
$284
This Kiwi.com deal was found by Cheapflights users on 4/19. Clicking the “Pick Dates” 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 9/116:00 am
SFO
- YYZ
2 stops10h 55m
WestJet
Mon 9/143:50 pm
YYZ
- SFO
1 stop9h 05m
WestJet
Deal found 4/19![WestJet logo]()
$289
This Kiwi.com deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/86:00 am
SFO
- YYZ
1 stop9h 55m
WestJet
Wed 9/1610:50 am
YYZ
- SFO
1 stop8h 50m
WestJet
Deal found 4/20![WestJet logo]()
$290
This FlightHub deal was found by Cheapflights users on 4/19. Clicking the “Pick Dates” 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 9/16:00 am
SFO
- YQT
2 stops9h 45m
WestJet
Tue 9/87:20 pm
YQT
- SFO
2 stops19h 40m
WestJet
Deal found 4/19![WestJet logo]()
$291
This Kiwi.com deal was found by Cheapflights users on 4/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/106:00 am
SFO
- YYZ
1 stop9h 55m
WestJet
Mon 9/143:50 pm
YYZ
- SFO
1 stop9h 05m
WestJet
Deal found 4/19![WestJet logo]()
$292
This Kiwi.com deal was found by Cheapflights users on 4/19. Clicking the “Pick Dates” 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 10/136:00 am
SFO
- YYZ
1 stop8h 10m
WestJet
Tue 10/206:15 am
YYZ
- SFO
1 stop8h 45m
WestJet
Deal found 4/19![WestJet logo]()
$293
This Kiwi.com deal was found by Cheapflights users on 4/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/76:00 am
SFO
- YYZ
2 stops10h 55m
WestJet
Thu 7/163:50 pm
YYZ
- SFO
1 stop9h 05m
WestJet
Deal found 4/23![WestJet logo]()
$295
This Kiwi.com deal was found by Cheapflights users on 4/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/86:05 pm
SFO
- YYZ
1 stop8h 40m
WestJet
Tue 10/66:15 am
YYZ
- SFO
1 stop8h 45m
WestJet
Deal found 4/23![WestJet logo]()
$296
This Justfly.com deal was found by Cheapflights users on 4/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/311:00 pm
SFO
- YYZ
2 stops13h 10m
WestJet
Wed 9/1610:00 am
YYZ
- SFO
1 stop9h 40m
WestJet
Deal found 4/22![WestJet logo]()
$297
This FlightHub deal was found by Cheapflights users on 4/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/311:00 pm
SFO
- YYZ
2 stops13h 10m
WestJet
Mon 9/76:15 am
YYZ
- SFO
1 stop8h 45m
WestJet
Deal found 4/22![WestJet logo]()
$298
This Kiwi.com deal was found by Cheapflights users on 4/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/56:05 pm
SFO
- YYZ
1 stop9h 50m
WestJet
Mon 7/133:50 pm
YYZ
- SFO
1 stop9h 05m
WestJet
Deal found 4/23![WestJet logo]()
$299
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 April 24, 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 April 24, 2026.
This FlightHub deal was found by Cheapflights users on 4/19. Clicking the “Pick Dates” 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 9/16:00 am
SFO
- YQT
2 stops9h 45m
WestJet
Tue 9/87:20 pm
YQT
- SFO
2 stops19h 40m
WestJet
Deal found 4/19![WestJet logo]()
$291
This FlightHub deal was found by Cheapflights users on 4/19. Clicking the “Pick Dates” 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 9/16:00 am
SFO
- YQT
1 stop10h 00m
Multiple Airlines
Tue 9/86:30 am
YQT
- SFO
1 stop8h 50m
Multiple Airlines
Deal found 4/19![Multiple Airlines logo]()
$294
This Air Canada deal was found by Cheapflights users on 4/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/317:30 pm
SFO
- YXU
2 stops13h 15m
Air Canada
Wed 9/25:40 am
YXU
- SFO
1 stop9h 52m
Air Canada
Deal found 4/21![Air Canada logo]()
$378
This Delta deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” 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.
Mon 6/15:50 am
SFO
- YYZ
1 stop8h 31m
Delta
Tue 6/236:10 am
YYZ
- SFO
1 stop11h 06m
Delta
Deal found 4/20![Delta logo]()
$432
This United Airlines deal was found by Cheapflights users on 4/19. Clicking the “Pick Dates” 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 6/224:30 pm
SFO
- YYZ
Nonstop4h 55m
United Airlines
Thu 7/26:30 am
YYZ
- SFO
Nonstop5h 39m
United Airlines
Deal found 4/19![United Airlines logo]()
$456
This WestJet deal was found by Cheapflights users on 4/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure WestJet is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/216:00 am
SFO
- YXU
1 stop7h 45m
WestJet
Thu 7/236:10 am
YXU
- SFO
1 stop8h 50m
WestJet
Deal found 4/23![WestJet logo]()
$356
This Delta deal was found by Cheapflights users on 4/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/512:15 am
SFO
- YYZ
1 stop8h 21m
Delta
Tue 6/91:40 pm
YYZ
- SFO
1 stop11h 09m
Delta
Deal found 4/21![Delta logo]()
$432
This FlightHub deal was found by Cheapflights users on 4/18. Clicking the “Pick Dates” 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 5/46:00 am
SFO
- YKF
1 stop10h 50m
WestJet
Wed 5/68:40 pm
YKF
- SFO
1 stop28h 15m
WestJet
Deal found 4/18![WestJet logo]()
$406
This Delta deal was found by Cheapflights users on 4/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/611:59 pm
SFO
- YYZ
1 stop8h 37m
Delta
Mon 5/117:22 pm
YYZ
- SFO
1 stop7h 28m
Delta
Deal found 4/22![Delta logo]()
$433
This United Airlines deal was found by Cheapflights users on 4/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/2912:45 am
SFO
- YUL
2 stops17h 41m
United Airlines
Thu 6/46:35 pm
YUL
- SFO
1 stop9h 40m
United Airlines
Deal found 4/23![United Airlines logo]()
$484
This FlightHub deal was found by Cheapflights users on 4/19. Clicking the “Pick Dates” 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 7/176:00 am
SFO
- YHM
1 stop8h 15m
WestJet
Mon 7/206:10 pm
YHM
- SFO
1 stop30h 45m
WestJet
Deal found 4/19![WestJet logo]()
$408
This Mytrip deal was found by Cheapflights users on 4/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/176:00 am
SFO
- YHM
1 stop8h 15m
Multiple Airlines
Sun 6/148:30 pm
YHM
- SFO
1 stop18h 30m
Multiple Airlines
Deal found 4/21![Multiple Airlines logo]()
$499
This Air Canada deal was found by Cheapflights users on 4/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/2110:47 pm
SFO
- YXU
1 stop7h 33m
Air Canada
Thu 7/236:20 pm
YXU
- SFO
2 stops10h 37m
Air Canada
Deal found 4/23![Air Canada logo]()
$507
This Delta deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” 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 7/295:35 am
SFO
- YYZ
1 stop8h 49m
Delta
Tue 8/45:45 pm
YYZ
- SFO
1 stop7h 00m
Delta
Deal found 4/20![Delta logo]()
$446
This United Airlines deal was found by Cheapflights users on 4/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/75:00 am
SFO
- YYZ
1 stop7h 14m
United Airlines
Sun 5/106:30 am
YYZ
- SFO
Nonstop5h 53m
United Airlines
Deal found 4/23![United Airlines logo]()
$495
This oojo deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” 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.
Sun 5/176:00 am
SFO
- YKF
1 stop10h 50m
WestJet
Sun 5/318:40 pm
YKF
- SFO
1 stop18h 20m
WestJet
Deal found 4/20![WestJet logo]()
$417
This Air Canada deal was found by Cheapflights users on 4/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/1011:47 pm
SFO
- YXU
2 stops12h 08m
Air Canada
Tue 7/145:10 am
YXU
- SFO
2 stops11h 59m
Air Canada
Deal found 4/23![Air Canada logo]()
$515
This Kiwi.com deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” 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 7/1311:52 pm
SFO
- YOW
2 stops14h 48m
Multiple Airlines
Sun 7/196:00 am
YOW
- SFO
1 stop9h 00m
Multiple Airlines
Deal found 4/20![Multiple Airlines logo]()
$519
This Delta deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” 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 7/316:00 am
SFO
- YYZ
1 stop13h 01m
Delta
Sun 8/92:24 pm
YYZ
- SFO
1 stop10h 58m
Delta
Deal found 4/20![Delta logo]()
$446
This Trip.com deal was found by Cheapflights users on 4/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/16:00 am
SFO
- YKF
1 stop10h 50m
WestJet
Mon 6/88:40 pm
YKF
- SFO
1 stop18h 20m
WestJet
Deal found 4/22![WestJet logo]()
$418
This Air Canada deal was found by Cheapflights users on 4/19. Clicking the “Pick Dates” 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 6/154:30 pm
SFO
- YQT
2 stops21h 50m
Air Canada
Fri 6/195:10 am
YQT
- SFO
1 stop8h 32m
Air Canada
Deal found 4/19![Air Canada logo]()
$541
This United Airlines deal was found by Cheapflights users on 4/19. Clicking the “Pick Dates” 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 6/2910:38 pm
SFO
- YTZ
1 stop8h 28m
United Airlines
Mon 7/207:20 pm
YTZ
- SFO
1 stop9h 37m
United Airlines
Deal found 4/19![United Airlines logo]()
$543
This Trip.com deal was found by Cheapflights users on 4/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/151:20 pm
SFO
- YOW
1 stop8h 05m
Multiple Airlines
Sat 6/206:55 am
YOW
- SFO
2 stops12h 45m
Multiple Airlines
Deal found 4/22![Multiple Airlines logo]()
$568
This Delta deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/2112:48 am
SFO
- YYZ
1 stop7h 47m
Delta
Thu 7/211:38 am
YYZ
- SFO
1 stop9h 07m
Delta
Deal found 4/20![Delta logo]()
$474
This Super.com deal was found by Cheapflights users on 4/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/166:05 pm
SFO
- YHM
1 stop20h 10m
WestJet
Mon 7/206:10 pm
YHM
- SFO
1 stop20h 50m
WestJet
Deal found 4/18![WestJet logo]()
$432
This United Airlines deal was found by Cheapflights users on 4/19. Clicking the “Pick Dates” 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 7/1811:30 pm
SFO
- YTZ
1 stop7h 36m
United Airlines
Fri 7/247:20 pm
YTZ
- SFO
1 stop9h 37m
United Airlines
Deal found 4/19![United Airlines logo]()
$543
This Air Canada deal was found by Cheapflights users on 4/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/255:00 am
SFO
- YQT
2 stops15h 15m
Air Canada
Thu 5/285:10 am
YQT
- SFO
1 stop10h 30m
Air Canada
Deal found 4/21![Air Canada logo]()
$546
This FlightHub deal was found by Cheapflights users on 4/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/106:05 pm
SFO
- YQT
2 stops21h 40m
Multiple Airlines
Tue 7/216:30 am
YQT
- SFO
1 stop8h 50m
Multiple Airlines
Deal found 4/21![Multiple Airlines logo]()
$573
This Delta deal was found by Cheapflights users on 4/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/2112:48 am
SFO
- YYZ
1 stop7h 47m
Delta
Fri 7/35:45 pm
YYZ
- SFO
1 stop7h 54m
Delta
Deal found 4/21![Delta logo]()
$474
This WestJet deal was found by Cheapflights users on 4/18. Clicking the “Pick Dates” 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 5/56:00 am
SFO
- YHM
1 stop8h 15m
WestJet
Sat 5/96:10 pm
YHM
- SFO
1 stop20h 50m
WestJet
Deal found 4/18![WestJet logo]()
$440
Last-minute flights from San Francisco to OntarioDiscover last-minute flight deals from San Francisco to Ontario. Data last updated April 24, 2026 and is based on user searches.
Discover last-minute flight deals from San Francisco to Ontario. Data last updated April 24, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 4/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/56:00 am
SFO
- YYZ
2 stops10h 55m
WestJet
Wed 5/133:50 pm
YYZ
- SFO
1 stop9h 05m
WestJet
Deal found 4/21![WestJet logo]()
$310
This Kiwi.com deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/86:00 am
SFO
- YYZ
2 stops10h 55m
WestJet
Mon 5/1810:00 am
YYZ
- SFO
1 stop9h 40m
WestJet
Deal found 4/20![WestJet logo]()
$325
This Kiwi.com deal was found by Cheapflights users on 4/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/86:00 am
SFO
- YYZ
2 stops10h 55m
WestJet
Tue 6/26:15 am
YYZ
- SFO
1 stop8h 45m
WestJet
Deal found 4/19![WestJet logo]()
$326
This Kiwi.com deal was found by Cheapflights users on 4/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/86:00 am
SFO
- YYZ
1 stop8h 10m
WestJet
Wed 5/1312:40 pm
YYZ
- SFO
2 stops12h 15m
WestJet
Deal found 4/19![WestJet logo]()
$327
This Mytrip deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” 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 5/118:05 am
SFO
- YTZ
1 stop8h 47m
Air Canada
Tue 5/1912:30 pm
YTZ
- SFO
1 stop11h 32m
Air Canada
Deal found 4/20![Air Canada logo]()
$349
This Kiwi.com deal was found by Cheapflights users on 4/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/126:00 am
SFO
- YYZ
2 stops36h 55m
Multiple Airlines
Tue 5/193:50 pm
YYZ
- SFO
1 stop9h 05m
Multiple Airlines
Deal found 4/23![Multiple Airlines logo]()
$309
This Kiwi.com deal was found by Cheapflights users on 4/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/126:00 am
SFO
- YYZ
1 stop8h 10m
WestJet
Sat 5/1612:40 pm
YYZ
- SFO
2 stops12h 15m
WestJet
Deal found 4/22![WestJet logo]()
$324
This FlightHub deal was found by Cheapflights users on 4/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/126:00 am
SFO
- YXU
1 stop7h 45m
WestJet
Sun 5/176:10 am
YXU
- SFO
1 stop8h 50m
WestJet
Deal found 4/22![WestJet logo]()
$346
This Kiwi.com deal was found by Cheapflights users on 4/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/131:00 pm
SFO
- YYZ
2 stops13h 10m
WestJet
Fri 6/53:50 pm
YYZ
- SFO
1 stop9h 05m
WestJet
Deal found 4/19![WestJet logo]()
$322
This Kiwi.com deal was found by Cheapflights users on 4/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/176:00 am
SFO
- YYZ
2 stops14h 59m
WestJet
Wed 9/1610:00 am
YYZ
- SFO
1 stop9h 40m
WestJet
Deal found 4/22![WestJet logo]()
$315
This Kiwi.com deal was found by Cheapflights users on 4/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/176:00 am
SFO
- YYZ
1 stop11h 05m
WestJet
Thu 9/173:50 pm
YYZ
- SFO
1 stop9h 05m
WestJet
Deal found 4/22![WestJet logo]()
$328
This Kiwi.com deal was found by Cheapflights users on 4/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/206:00 am
SFO
- YYZ
2 stops16h 05m
Multiple Airlines
Thu 9/176:15 am
YYZ
- SFO
1 stop8h 45m
Multiple Airlines
Deal found 4/22![Multiple Airlines logo]()
$320
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 April 24, 2026.
Search for one-way flight options from San Francisco to Ontario. Find affordable one-way fares based on user searches. Data last updated April 24, 2026.
This Kiwi.com deal was found by Cheapflights users on 4/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/86:00 am
SFO
- YYZ
2 stops10h 55m
WestJet
Deal found 4/21![WestJet logo]()
$153
This Kiwi.com deal was found by Cheapflights users on 4/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/96:00 am
SFO
- YYZ
2 stops10h 55m
WestJet
Deal found 4/19![WestJet logo]()
$154
This Justfly.com deal was found by Cheapflights users on 4/19. Clicking the “Pick Dates” 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.
Mon 7/136:00 am
SFO
- YHM
1 stop8h 15m
WestJet
Deal found 4/19![WestJet logo]()
$154
This FlightHub deal was found by Cheapflights users on 4/19. Clicking the “Pick Dates” 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.
Sun 6/286:05 pm
SFO
- YOW
1 stop8h 30m
WestJet
Deal found 4/19![WestJet logo]()
$154
This Trip.com deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” 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 6/711:36 am
SFO
- YYZ
2 stops15h 09m
Multiple Airlines
Deal found 4/20![Multiple Airlines logo]()
$155
This Kiwi.com deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” 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 5/176:00 am
SFO
- YYZ
1 stop8h 10m
WestJet
Deal found 4/20![WestJet logo]()
$156
This Kiwi.com deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” 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 6/11:00 pm
SFO
- YYZ
1 stop8h 10m
WestJet
Deal found 4/20![WestJet logo]()
$157
This Super.com deal was found by Cheapflights users on 4/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/166:00 am
SFO
- YHM
1 stop8h 15m
WestJet
Deal found 4/19![WestJet logo]()
$157
This Kiwi.com deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” 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 6/2110:58 pm
SFO
- YYZ
3 stops19h 37m
Multiple Airlines
Deal found 4/20![Multiple Airlines logo]()
$158
This Trip.com deal was found by Cheapflights users on 4/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/1410:58 pm
SFO
- YKF
2 stops17h 52m
Multiple Airlines
Deal found 4/21![Multiple Airlines logo]()
$159
This Super.com deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/46:00 am
SFO
- YHM
1 stop8h 15m
WestJet
Deal found 4/20![WestJet logo]()
$159
This WestJet deal was found by Cheapflights users on 4/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure WestJet is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/316:05 pm
SFO
- YYZ
1 stop9h 50m
WestJet
Deal found 4/22![WestJet logo]()
$160
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 April 24, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $265 (FlightHub) |
One-way from | $153 (Kiwi.com) |
Popular in | December |
Cheapest in | January |
Average price | $463 |
Good round-trip deal | $487 or less |
Good one-way deal | $249 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 April 24, 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
Tue 9/1
6:00 am-6:45 pm
2 stops9h 45m
Thunder Bay
Tue 9/8
7:20 pm-12:00 pm
2 stops19h 40m
$291
San FranciscoThunder Bay
SFO - YQT
SFOYQT
San Francisco
Tue 9/1
6:00 am-7:00 pm
1 stop10h 00m
Thunder Bay
Tue 9/8
6:30 am-12:20 pm
1 stop8h 50m
$294
San FranciscoLondon
SFO - YXU
SFOYXU
San Francisco
Tue 7/21
6:00 am-4:45 pm
1 stop7h 45m
London
Thu 7/23
6:10 am-12:00 pm
1 stop8h 50m
$356
San FranciscoLondon
SFO - YXU
SFOYXU
San Francisco
Mon 8/31
7:30 pm-11:45 am
2 stops13h 15m
London
Wed 9/2
5:40 am-12:32 pm
1 stop9h 52m
$378
San FranciscoToronto
SFO - YKF
SFOYKF
San Francisco
Mon 5/4
6:00 am-7:50 pm
1 stop10h 50m
Toronto Region of Waterloo Intl
Wed 5/6
8:40 pm-9:55 pm
1 stop28h 15m
$406
San FranciscoHamilton
SFO - YHM
SFOYHM
San Francisco
Fri 7/17
6:00 am-5:15 pm
1 stop8h 15m
Hamilton
Mon 7/20
6:10 pm-9:55 pm
1 stop30h 45m
$408
San FranciscoToronto
SFO - YKF
SFOYKF
San Francisco
Sun 5/17
6:00 am-7:50 pm
1 stop10h 50m
Toronto Region of Waterloo Intl
Sun 5/31
8:40 pm-12:00 pm
1 stop18h 20m
$417
San FranciscoToronto
SFO - YKF
SFOYKF
San Francisco
Mon 6/1
6:00 am-7:50 pm
1 stop10h 50m
Toronto Region of Waterloo Intl
Mon 6/8
8:40 pm-12:00 pm
1 stop18h 20m
$418
San FranciscoToronto
SFO - YYZ
SFOYYZ
San Francisco
Mon 6/1
5:50 am-5:21 pm
1 stop8h 31m
Toronto Pearson Intl
Tue 6/23
6:10 am-2:16 pm
1 stop11h 06m
$432
San FranciscoToronto
SFO - YYZ
SFOYYZ
San Francisco
Fri 6/5
12:15 am-11:36 am
1 stop8h 21m
Toronto Pearson Intl
Tue 6/9
1:40 pm-9:49 pm
1 stop11h 09m
$432
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-YXU
SFO-YYZ
SFO-YKF
SFO-YUL
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-YXU
SFO-YYZ
SFO-YKF
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 65 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.
What is the cheapest month to book a flight from San Francisco to Region of Ontario?
Currently, February is the cheapest month in which you can book a flight from San Francisco to Region of Ontario (average of $109). Flying from San Francisco to Region of Ontario in October is currently the most expensive (average of $1,486). 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 April 24, 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 30% on airfare.
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 April 18, 2026.
Travelers seeking maximum savings on their San Francisco to Region of Ontario flight should consider departing on Wednesday at noon when fares are most often at their lowest. Sunday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.
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 April 24, 2026.
The most flights from SFO to CAON are scheduled on a Monday (25 on average). You will have fewer flight options on Saturday, 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?
Reviews of airlines servicing Ontario
Get insights into the airlines that provide service to Ontario. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Ontario. Reviews last updated April 24, 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.
Entertainment
7.0
Crew
8.6
Comfort
8.0
Boarding
8.2
Food
7.6
Overall
8.0
Reviews
1 / 20
10.0
ExcellentJohn,Mar 2026
YYZ - PVR
Entertainment
7.0
Crew
8.6
Comfort
8.0
Boarding
8.2
Food
7.6
Overall
8.0
Reviews
1 / 20
10.0
ExcellentJohn,Mar 2026
YYZ - PVR
Entertainment
7.0
Crew
8.6
Comfort
8.0
Boarding
8.2
Food
7.6
Overall
8.0
Reviews
1 / 20
10.0
ExcellentJohn,Mar 2026
YYZ - PVR
Entertainment
7.0
Crew
8.6
Comfort
8.0
Boarding
8.2
Food
7.6
Overall
8.0
Reviews
1 / 20
10.0
ExcellentJohn,Mar 2026
YYZ - PVR
Entertainment
7.0
Crew
8.6
Comfort
8.0
Boarding
8.2
Food
7.6
Overall
8.0
Reviews
1 / 20
10.0
ExcellentJohn,Mar 2026
YYZ - PVR
Entertainment
7.0
Crew
8.6
Comfort
8.0
Boarding
8.2
Food
7.6
Overall
8.0
Reviews
1 / 20
10.0
ExcellentJohn,Mar 2026
YYZ - PVR
Related info for your journey
Find useful and relevant information for your journey from San Francisco to Ontario. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Browse thousands of different options on Cheapflights for your next trip
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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 April 24, 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 April 24, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$142 | Average$378 | FlexibilityNo cancel fee | On-time60% | |
| Cheapest$160 | Average$508 | FlexibilityNo cancel fee | On-time50% | |
| Cheapest$161 | Average$453 | FlexibilityNo cancel fee | On-time52% | |
| Cheapest$185 | Average$446 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$191 | Average$616 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$338 | Average$404 | FlexibilityNo cancel fee | On-time68% | |
| Cheapest$359 | Average$689 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$416 | Average$568 | FlexibilityNo cancel fee | On-time71% |