$148+ 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 6/2. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — YYZ
Apr 11 — Apr 181
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
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
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
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
Cheapest
Best
Last-minute
One-way
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 March 12, 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 March 12, 2026.
This Kiwi.com deal was found by Cheapflights users on 3/7. 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.
Tue 4/76:34 pm
SFO
- YYZ
2 stops22h 02m
Multiple Airlines
Mon 4/208:00 pm
YYZ
- SFO
1 stop20h 52m
Multiple Airlines
Deal found 3/7![Multiple Airlines logo]()
$272
This Kiwi.com deal was found by Cheapflights users on 3/7. 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.
Wed 4/810:14 pm
SFO
- YYZ
2 stops19h 57m
Multiple Airlines
Mon 4/208:00 pm
YYZ
- SFO
1 stop20h 52m
Multiple Airlines
Deal found 3/7![Multiple Airlines logo]()
$273
This Kiwi.com deal was found by Cheapflights users on 3/9. 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 4/76:34 pm
SFO
- YYZ
2 stops22h 52m
Multiple Airlines
Mon 4/138:00 pm
YYZ
- SFO
1 stop25h 45m
Multiple Airlines
Deal found 3/9![Multiple Airlines logo]()
$274
This Kiwi.com deal was found by Cheapflights users on 3/7. 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.
Sat 4/257:40 pm
SFO
- YYZ
1 stop7h 40m
Multiple Airlines
Tue 4/289:45 am
YYZ
- SFO
1 stop31h 07m
Multiple Airlines
Deal found 3/7![Multiple Airlines logo]()
$276
This Kiwi.com deal was found by Cheapflights users on 3/8. 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.
Sat 4/182:47 pm
SFO
- YYZ
1 stop12h 33m
Multiple Airlines
Wed 4/221:30 pm
YYZ
- SFO
2 stops21h 53m
Multiple Airlines
Deal found 3/8![Multiple Airlines logo]()
$277
This Kiwi.com deal was found by Cheapflights users on 3/7. 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.
Sat 4/257:40 pm
SFO
- YYZ
1 stop7h 40m
Multiple Airlines
Mon 5/41:45 pm
YYZ
- SFO
1 stop30h 07m
Multiple Airlines
Deal found 3/7![Multiple Airlines logo]()
$279
This Kiwi.com deal was found by Cheapflights users on 3/10. 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.
Sat 4/187:40 pm
SFO
- YYZ
1 stop7h 40m
Multiple Airlines
Tue 4/289:35 am
YYZ
- SFO
1 stop31h 17m
Multiple Airlines
Deal found 3/10![Multiple Airlines logo]()
$289
This Kiwi.com deal was found by Cheapflights users on 3/8. 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.
Wed 4/227:40 pm
SFO
- YYZ
2 stops20h 56m
Multiple Airlines
Wed 4/296:15 am
YYZ
- SFO
1 stop8h 45m
Multiple Airlines
Deal found 3/8![Multiple Airlines logo]()
$296
This Trip.com deal was found by Cheapflights users on 3/9. 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 4/142:47 pm
SFO
- YYZ
2 stops12h 26m
Multiple Airlines
Sat 4/189:50 am
YYZ
- SFO
Nonstop5h 55m
Multiple Airlines
Deal found 3/9![Multiple Airlines logo]()
$300
This Kiwi.com deal was found by Cheapflights users on 3/9. 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 4/201:12 pm
SFO
- YYZ
1 stop14h 31m
Multiple Airlines
Tue 4/289:45 am
YYZ
- SFO
1 stop12h 00m
Multiple Airlines
Deal found 3/9![Multiple Airlines logo]()
$301
This Mytrip deal was found by Cheapflights users on 3/10. 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 4/278:10 am
SFO
- YTZ
1 stop8h 42m
Air Canada
Wed 5/612:30 pm
YTZ
- SFO
1 stop11h 32m
Air Canada
Deal found 3/10![Air Canada logo]()
$334
This Kiwi.com deal was found by Cheapflights users on 3/7. 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 5/296:05 pm
SFO
- YUL
1 stop10h 00m
WestJet
Mon 6/16:45 am
YUL
- SFO
2 stops12h 55m
WestJet
Deal found 3/7![WestJet logo]()
$344
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 March 12, 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 March 12, 2026.
This CheapTickets.ch deal was found by Cheapflights users on 3/9. 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 CheapTickets.ch is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/231:45 pm
SFO
- YOW
1 stop7h 56m
Multiple Airlines
Thu 4/3012:25 pm
YOW
- SFO
2 stops12h 30m
Multiple Airlines
Deal found 3/9![Multiple Airlines logo]()
$371
This FlightHub deal was found by Cheapflights users on 3/7. 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.
Fri 5/156:00 am
SFO
- YOW
1 stop8h 15m
WestJet
Sun 5/171:20 pm
YOW
- SFO
1 stop11h 35m
WestJet
Deal found 3/7![WestJet logo]()
$377
This Air Canada deal was found by Cheapflights users on 3/11. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/296:00 pm
SFO
- YOW
1 stop9h 45m
Air Canada
Fri 5/17:00 am
YOW
- SFO
1 stop8h 40m
Air Canada
Deal found 3/11![Air Canada logo]()
$412
This Porter Airlines deal was found by Cheapflights users on 3/7. 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.
Tue 4/141:45 pm
SFO
- YYZ
Nonstop4h 57m
Porter Airlines
Wed 4/159:50 am
YYZ
- SFO
Nonstop5h 55m
Porter Airlines
Deal found 3/7![Porter Airlines logo]()
$414
This United Airlines deal was found by Cheapflights users on 3/9. 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 4/68:53 pm
SFO
- YYZ
1 stop15h 21m
United Airlines
Tue 4/75:16 pm
YYZ
- SFO
Nonstop5h 53m
United Airlines
Deal found 3/9![United Airlines logo]()
$427
This Alaska Airlines deal was found by Cheapflights users on 3/9. 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.
Tue 4/281:45 pm
SFO
- YYZ
2 stops23h 00m
Alaska Airlines
Tue 5/124:55 pm
YYZ
- SFO
1 stop8h 33m
Alaska Airlines
Deal found 3/9![Alaska Airlines logo]()
$429
This Delta deal was found by Cheapflights users on 3/9. 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.
Thu 4/95:50 am
SFO
- YYZ
1 stop6h 18m
Delta
Tue 4/2112:16 pm
YYZ
- SFO
1 stop9h 47m
Delta
Deal found 3/9![Delta logo]()
$458
This Vliegwinkel deal was found by Cheapflights users on 3/7. 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 Vliegwinkel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/276:00 am
SFO
- YKF
1 stop10h 50m
WestJet
Wed 5/68:40 pm
YKF
- SFO
1 stop28h 15m
WestJet
Deal found 3/7![WestJet logo]()
$402
This Air Canada deal was found by Cheapflights users on 3/11. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/82:30 pm
SFO
- YOW
1 stop8h 06m
Air Canada
Wed 4/157:45 am
YOW
- SFO
1 stop10h 47m
Air Canada
Deal found 3/11![Air Canada logo]()
$412
This WestJet deal was found by Cheapflights users on 3/7. 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 WestJet is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/16:00 am
SFO
- YXU
1 stop7h 45m
WestJet
Tue 5/56:10 am
YXU
- SFO
1 stop8h 50m
WestJet
Deal found 3/7![WestJet logo]()
$404
This United Airlines deal was found by Cheapflights users on 3/10. 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.
Mon 3/3010:50 pm
SFO
- YYZ
1 stop8h 04m
United Airlines
Sat 4/46:30 am
YYZ
- SFO
Nonstop5h 53m
United Airlines
Deal found 3/10![United Airlines logo]()
$452
This Porter Airlines deal was found by Cheapflights users on 3/7. 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.
Mon 4/131:45 pm
SFO
- YUL
1 stop7h 50m
Porter Airlines
Thu 4/166:45 am
YUL
- SFO
1 stop9h 00m
Porter Airlines
Deal found 3/7![Porter Airlines logo]()
$457
This Air Canada deal was found by Cheapflights users on 3/11. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/17:30 pm
SFO
- YXU
2 stops13h 13m
Air Canada
Tue 5/55:40 am
YXU
- SFO
2 stops12h 42m
Air Canada
Deal found 3/11![Air Canada logo]()
$421
This Delta deal was found by Cheapflights users on 3/10. 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.
Sun 5/311:57 pm
SFO
- YUL
1 stop8h 41m
Delta
Wed 5/1312:49 pm
YUL
- SFO
1 stop12h 32m
Delta
Deal found 3/10![Delta logo]()
$466
This Alaska Airlines deal was found by Cheapflights users on 3/8. 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.
Mon 5/117:00 am
SFO
- YYZ
1 stop29h 45m
Alaska Airlines
Mon 5/184:55 pm
YYZ
- SFO
1 stop30h 21m
Alaska Airlines
Deal found 3/8![Alaska Airlines logo]()
$469
This Booking.com deal was found by Cheapflights users on 3/9. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/191:00 pm
SFO
- YOW
2 stops32h 39m
Multiple Airlines
Wed 4/226:45 am
YOW
- SFO
1 stop9h 00m
Multiple Airlines
Deal found 3/9![Multiple Airlines logo]()
$480
This FlightHub deal was found by Cheapflights users on 3/7. 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.
Wed 6/176:05 pm
SFO
- YXU
1 stop8h 15m
WestJet
Mon 6/225:55 pm
YXU
- SFO
1 stop21h 05m
WestJet
Deal found 3/7![WestJet logo]()
$408
This United Airlines deal was found by Cheapflights users on 3/8. 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.
Sun 5/245:05 am
SFO
- YYZ
1 stop7h 41m
United Airlines
Sun 5/316:30 am
YYZ
- SFO
Nonstop5h 39m
United Airlines
Deal found 3/8![United Airlines logo]()
$452
This oojo deal was found by Cheapflights users on 3/9. 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.
Fri 5/86:00 am
SFO
- YKF
1 stop10h 50m
WestJet
Mon 5/118:40 pm
YKF
- SFO
1 stop28h 15m
WestJet
Deal found 3/9![WestJet logo]()
$411
This Alaska Airlines deal was found by Cheapflights users on 3/7. 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 4/1810:23 am
SFO
- YYZ
2 stops26h 22m
Alaska Airlines
Mon 4/204:55 pm
YYZ
- SFO
1 stop30h 16m
Alaska Airlines
Deal found 3/7![Alaska Airlines logo]()
$505
This Delta deal was found by Cheapflights users on 3/9. 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.
Sun 3/299:35 pm
SFO
- YUL
1 stop11h 02m
Delta
Thu 4/912:50 pm
YUL
- SFO
1 stop12h 46m
Delta
Deal found 3/9![Delta logo]()
$508
This Mytrip deal was found by Cheapflights users on 3/7. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/276:00 am
SFO
- YKF
1 stop10h 50m
Multiple Airlines
Sun 5/316:05 am
YKF
- SFO
1 stop8h 55m
Multiple Airlines
Deal found 3/7![Multiple Airlines logo]()
$509
This United Airlines deal was found by Cheapflights users on 3/9. 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 4/68:53 pm
SFO
- YYZ
1 stop15h 21m
United Airlines
Fri 4/105:20 pm
YYZ
- SFO
1 stop11h 15m
United Airlines
Deal found 3/9![United Airlines logo]()
$467
This Air Canada deal was found by Cheapflights users on 3/7. 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.
Wed 6/177:30 pm
SFO
- YXU
2 stops13h 12m
Air Canada
Mon 6/226:10 pm
YXU
- SFO
2 stops20h 11m
Air Canada
Deal found 3/7![Air Canada logo]()
$486
This Alaska Airlines deal was found by Cheapflights users on 3/9. 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.
Tue 4/76:56 pm
SFO
- YYZ
2 stops17h 49m
Alaska Airlines
Thu 4/94:55 pm
YYZ
- SFO
2 stops18h 56m
Alaska Airlines
Deal found 3/9![Alaska Airlines logo]()
$508
This Delta deal was found by Cheapflights users on 3/6. 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.
Mon 3/239:35 pm
SFO
- YUL
1 stop11h 02m
Delta
Mon 3/3012:42 pm
YUL
- SFO
1 stop10h 43m
Delta
Deal found 3/6![Delta logo]()
$508
This oojo deal was found by Cheapflights users on 3/11. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/286:00 am
SFO
- YHM
1 stop8h 15m
WestJet
Tue 5/56:10 pm
YHM
- SFO
1 stop20h 50m
WestJet
Deal found 3/11![WestJet logo]()
$423
This United Airlines deal was found by Cheapflights users on 3/10. 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 5/311:56 pm
SFO
- YUL
1 stop7h 44m
United Airlines
Thu 5/142:20 pm
YUL
- SFO
1 stop10h 29m
United Airlines
Deal found 3/10![United Airlines logo]()
$476
This Mytrip deal was found by Cheapflights users on 3/9. 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.
Fri 5/16:00 am
SFO
- YHM
1 stop14h 13m
Multiple Airlines
Sun 5/107:55 pm
YHM
- SFO
1 stop19h 05m
Multiple Airlines
Deal found 3/9![Multiple Airlines logo]()
$547
This United Airlines deal was found by Cheapflights users on 3/8. 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.
Wed 4/2212:45 am
SFO
- YYZ
1 stop10h 39m
United Airlines
Thu 4/306:10 am
YYZ
- SFO
1 stop9h 08m
United Airlines
Deal found 3/8![United Airlines logo]()
$477
Last-minute flights from San Francisco to OntarioDiscover last-minute flight deals from San Francisco to Ontario. Data last updated March 12, 2026 and is based on user searches.
Discover last-minute flight deals from San Francisco to Ontario. Data last updated March 12, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 3/7. 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.
Tue 4/76:34 pm
SFO
- YYZ
2 stops22h 02m
Multiple Airlines
Mon 4/208:00 pm
YYZ
- SFO
1 stop20h 52m
Multiple Airlines
Deal found 3/7![Multiple Airlines logo]()
$272
This Kiwi.com deal was found by Cheapflights users on 3/9. 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 4/76:34 pm
SFO
- YYZ
2 stops22h 52m
Multiple Airlines
Mon 4/138:00 pm
YYZ
- SFO
1 stop25h 45m
Multiple Airlines
Deal found 3/9![Multiple Airlines logo]()
$274
This Kiwi.com deal was found by Cheapflights users on 3/7. 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.
Wed 4/810:14 pm
SFO
- YYZ
2 stops19h 57m
Multiple Airlines
Mon 4/208:00 pm
YYZ
- SFO
1 stop20h 52m
Multiple Airlines
Deal found 3/7![Multiple Airlines logo]()
$273
This Trip.com deal was found by Cheapflights users on 3/9. 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 4/142:47 pm
SFO
- YYZ
2 stops12h 26m
Multiple Airlines
Sat 4/189:50 am
YYZ
- SFO
Nonstop5h 55m
Multiple Airlines
Deal found 3/9![Multiple Airlines logo]()
$300
This Kiwi.com deal was found by Cheapflights users on 3/8. 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.
Sat 4/182:47 pm
SFO
- YYZ
1 stop12h 33m
Multiple Airlines
Wed 4/221:30 pm
YYZ
- SFO
2 stops21h 53m
Multiple Airlines
Deal found 3/8![Multiple Airlines logo]()
$277
This Kiwi.com deal was found by Cheapflights users on 3/10. 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.
Sat 4/187:40 pm
SFO
- YYZ
1 stop7h 40m
Multiple Airlines
Tue 4/289:35 am
YYZ
- SFO
1 stop31h 17m
Multiple Airlines
Deal found 3/10![Multiple Airlines logo]()
$289
This Kiwi.com deal was found by Cheapflights users on 3/9. 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 4/201:12 pm
SFO
- YYZ
1 stop14h 31m
Multiple Airlines
Tue 4/289:45 am
YYZ
- SFO
1 stop12h 00m
Multiple Airlines
Deal found 3/9![Multiple Airlines logo]()
$301
This Kiwi.com deal was found by Cheapflights users on 3/8. 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.
Wed 4/227:40 pm
SFO
- YYZ
2 stops20h 56m
Multiple Airlines
Wed 4/296:15 am
YYZ
- SFO
1 stop8h 45m
Multiple Airlines
Deal found 3/8![Multiple Airlines logo]()
$296
This Kiwi.com deal was found by Cheapflights users on 3/7. 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.
Sat 4/257:40 pm
SFO
- YYZ
1 stop7h 40m
Multiple Airlines
Tue 4/289:45 am
YYZ
- SFO
1 stop31h 07m
Multiple Airlines
Deal found 3/7![Multiple Airlines logo]()
$276
This Kiwi.com deal was found by Cheapflights users on 3/7. 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.
Sat 4/257:40 pm
SFO
- YYZ
1 stop7h 40m
Multiple Airlines
Mon 5/41:45 pm
YYZ
- SFO
1 stop30h 07m
Multiple Airlines
Deal found 3/7![Multiple Airlines logo]()
$279
This Mytrip deal was found by Cheapflights users on 3/10. 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 4/278:10 am
SFO
- YTZ
1 stop8h 42m
Air Canada
Wed 5/612:30 pm
YTZ
- SFO
1 stop11h 32m
Air Canada
Deal found 3/10![Air Canada logo]()
$334
This American Airlines deal was found by Cheapflights users on 3/11. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/2810:35 pm
SFO
- YUL
1 stop20h 02m
American Airlines
Thu 4/304:16 pm
YUL
- SFO
1 stop9h 36m
American Airlines
Deal found 3/11![American Airlines logo]()
$347
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 March 12, 2026.
Search for one-way flight options from San Francisco to Ontario. Find affordable one-way fares based on user searches. Data last updated March 12, 2026.
This Kiwi.com deal was found by Cheapflights users on 3/9. 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 6/21:00 pm
SFO
- YYZ
2 stops13h 10m
WestJet
Deal found 3/9![WestJet logo]()
$148
This Kiwi.com deal was found by Cheapflights users on 3/7. 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.
Mon 5/116:00 am
SFO
- YYZ
2 stops10h 55m
WestJet
Deal found 3/7![WestJet logo]()
$149
This Kiwi.com deal was found by Cheapflights users on 3/9. 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.
Sun 4/1210:57 pm
SFO
- YYZ
2 stops28h 16m
Multiple Airlines
Deal found 3/9![Multiple Airlines logo]()
$150
This Kiwi.com deal was found by Cheapflights users on 3/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/110:14 pm
SFO
- YYZ
1 stop29h 29m
Multiple Airlines
Deal found 3/6![Multiple Airlines logo]()
$151
This iWofly deal was found by Cheapflights users on 3/8. 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 iWofly is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/61:00 pm
SFO
- YYZ
2 stops13h 10m
WestJet
Deal found 3/8![WestJet logo]()
$152
This Kiwi.com deal was found by Cheapflights users on 3/10. 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 4/810:14 pm
SFO
- YYZ
3 stops22h 21m
Multiple Airlines
Deal found 3/10![Multiple Airlines logo]()
$153
This Kiwi.com deal was found by Cheapflights users on 3/9. 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.
Sat 5/21:00 pm
SFO
- YYZ
1 stop9h 05m
WestJet
Deal found 3/9![WestJet logo]()
$154
This Trip.com deal was found by Cheapflights users on 3/11. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/610:50 pm
SFO
- YYZ
2 stops34h 38m
Multiple Airlines
Deal found 3/11![Multiple Airlines logo]()
$155
This Kiwi.com deal was found by Cheapflights users on 3/10. 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 4/1311:20 am
SFO
- YYZ
3 stops15h 38m
Multiple Airlines
Deal found 3/10![Multiple Airlines logo]()
$156
This Gotogate deal was found by Cheapflights users on 3/9. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/256:05 pm
SFO
- YOW
1 stop8h 30m
WestJet
Deal found 3/9![WestJet logo]()
$156
This FlightHub deal was found by Cheapflights users on 3/9. 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.
Fri 5/296:00 am
SFO
- YYZ
2 stops12h 10m
WestJet
Deal found 3/9![WestJet logo]()
$157
This Kiwi.com deal was found by Cheapflights users on 3/9. 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 5/272:16 pm
SFO
- YYZ
1 stop26h 53m
Multiple Airlines
Deal found 3/9![Multiple Airlines logo]()
$159
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 March 12, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $272 (Kiwi.com) |
One-way from | $148 (Kiwi.com) |
Popular in | December |
Cheapest in | January |
Average price | $439 |
Good round-trip deal | $422 or less |
Good one-way deal | $215 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 March 12, 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 FranciscoOttawa
SFO - YOW
SFOYOW
San Francisco
Thu 4/23
1:45 pm-12:41 am
1 stop7h 56m
Ottawa
Thu 4/30
12:25 pm-9:55 pm
2 stops12h 30m
$371
San FranciscoOttawa
SFO - YOW
SFOYOW
San Francisco
Fri 5/15
6:00 am-5:15 pm
1 stop8h 15m
Ottawa
Sun 5/17
1:20 pm-9:55 pm
1 stop11h 35m
$377
San FranciscoToronto
SFO - YKF
SFOYKF
San Francisco
Mon 4/27
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
$402
San FranciscoLondon
SFO - YXU
SFOYXU
San Francisco
Fri 5/1
6:00 am-4:45 pm
1 stop7h 45m
London
Tue 5/5
6:10 am-12:00 pm
1 stop8h 50m
$404
San FranciscoLondon
SFO - YXU
SFOYXU
San Francisco
Wed 6/17
6:05 pm-5:20 am
1 stop8h 15m
London
Mon 6/22
5:55 pm-12:00 pm
1 stop21h 05m
$408
San FranciscoToronto
SFO - YKF
SFOYKF
San Francisco
Fri 5/8
6:00 am-7:50 pm
1 stop10h 50m
Toronto Region of Waterloo Intl
Mon 5/11
8:40 pm-9:55 pm
1 stop28h 15m
$411
San FranciscoOttawa
SFO - YOW
SFOYOW
San Francisco
Wed 4/29
6:00 pm-6:45 am
1 stop9h 45m
Ottawa
Fri 5/1
7:00 am-12:40 pm
1 stop8h 40m
$412
San FranciscoOttawa
SFO - YOW
SFOYOW
San Francisco
Wed 4/8
2:30 pm-1:36 am
1 stop8h 06m
Ottawa
Wed 4/15
7:45 am-3:32 pm
1 stop10h 47m
$412
Quickest round-trip
San FranciscoToronto
SFO - YYZ
SFOYYZ
San Francisco
Tue 4/14
1:45 pm-9:42 pm
Nonstop4h 57m
Toronto Pearson Intl
Wed 4/15
9:50 am-12:45 pm
Nonstop5h 55m
$414
San FranciscoLondon
SFO - YXU
SFOYXU
San Francisco
Fri 5/1
7:30 pm-11:43 am
2 stops13h 13m
London
Tue 5/5
5:40 am-3:22 pm
2 stops12h 42m
$421
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-YYZ
SFO-YOW
SFO-YTZ
SFO-YUL
SFO-YKF
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-YYZ
SFO-YOW
SFO-YTZ
SFO-YUL
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 $126). Flying from San Francisco to Region of Ontario in January is currently the most expensive (average of $221). 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 March 12, 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 36% 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 February 21, 2026.
Travelers seeking maximum savings on their San Francisco to Region of Ontario flight should consider departing on Monday 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 March 12, 2026.
The most flights from SFO to CAON are scheduled on a Wednesday (24 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (18 on average).
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 March 12, 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.
Overall
8.0
Comfort
8.0
Entertainment
7.0
Boarding
8.2
Crew
8.6
Food
7.6
Reviews
1 / 20
10.0
ExcellentJohn,Mar 2026
YYZ - PVR
Overall
8.0
Comfort
8.0
Entertainment
7.0
Boarding
8.2
Crew
8.6
Food
7.6
Reviews
1 / 20
10.0
ExcellentJohn,Mar 2026
YYZ - PVR
Overall
8.0
Comfort
8.0
Entertainment
7.0
Boarding
8.2
Crew
8.6
Food
7.6
Reviews
1 / 20
10.0
ExcellentJohn,Mar 2026
YYZ - PVR
Overall
8.0
Comfort
8.0
Entertainment
7.0
Boarding
8.2
Crew
8.6
Food
7.6
Reviews
1 / 20
10.0
ExcellentJohn,Mar 2026
YYZ - PVR
Overall
8.0
Comfort
8.0
Entertainment
7.0
Boarding
8.2
Crew
8.6
Food
7.6
Reviews
1 / 20
10.0
ExcellentJohn,Mar 2026
YYZ - PVR
Overall
8.0
Comfort
8.0
Entertainment
7.0
Boarding
8.2
Crew
8.6
Food
7.6
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
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
Alternative routes
Complete your trip
Flights by cabin class
Other flight options
Popular flights
Top destinations
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 March 12, 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 7 airlines flying from San Francisco to Ontario
Discover the top 7 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 March 12, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$136 | Average$577 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$142 | Average$355 | FlexibilityNo cancel fee | On-time60% | |
| Cheapest$160 | Average$414 | FlexibilityNo cancel fee | On-time52% | |
| Cheapest$185 | Average$442 | FlexibilityNo cancel fee | On-time50% | |
| Cheapest$189 | Average$446 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$356 | Average$614 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$403 | Average$567 | FlexibilityNo cancel fee | On-time71% |