$151+ Cheap flights from San Francisco (SFO) to Ontario
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/17. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — YYZ
Nov 26 — Dec 31
Round-trip
1 adult, Economy
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Find cheap flights from San Francisco to Ontario with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
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Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from San Francisco to Ontario
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Cheapest flights from San Francisco to OntarioExplore the most affordable flight options available from San Francisco to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 27, 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 October 27, 2026.
This Super.com deal was found by Cheapflights users on 10/25. Clicking the “Pick Dates” 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.
Fri 12/41:45 pm -
Nonstop4h 57m
Thu 12/109:50 am -
Nonstop5h 57m
Deal found 10/25![Porter Airlines logo]()
$262
This Kiwi.com deal was found by Cheapflights users on 10/23. 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.
Sat 12/51:45 pm -
Nonstop4h 57m
Thu 12/109:50 am -
Nonstop5h 57m
Deal found 10/23![Porter Airlines logo]()
$263
This Kiwi.com deal was found by Cheapflights users on 10/25. Clicking the “Pick Dates” 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 12/31:45 pm -
Nonstop4h 57m
Tue 12/89:50 am -
Nonstop5h 57m
Deal found 10/25![Porter Airlines logo]()
$265
This Kiwi.com deal was found by Cheapflights users on 10/23. 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 12/71:45 pm -
Nonstop4h 57m
Mon 12/149:50 am -
Nonstop5h 57m
Deal found 10/23![Porter Airlines logo]()
$271
This Kiwi.com deal was found by Cheapflights users on 10/23. 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.
Sat 12/51:45 pm -
Nonstop4h 57m
Sun 12/139:50 am -
Nonstop5h 57m
Deal found 10/23![Porter Airlines logo]()
$272
This Flightnetwork deal was found by Cheapflights users on 10/22. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/62:00 pm -
Nonstop4h 49m
Sun 12/139:50 am -
Nonstop5h 57m
Deal found 10/22![Multiple Airlines logo]()
$273
This Kiwi.com deal was found by Cheapflights users on 10/25. Clicking the “Pick Dates” 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 12/310:35 am -
1 stop17h 17m
Sat 12/59:50 am -
Nonstop5h 57m
Deal found 10/25![Multiple Airlines logo]()
$274
This Flightnetwork deal was found by Cheapflights users on 10/22. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/124:40 pm -
Nonstop4h 49m
Wed 11/186:40 pm -
Nonstop5h 50m
Deal found 10/22![Air Canada logo]()
$276
This Air Canada deal was found by Cheapflights users on 10/22. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/2412:00 pm -
Nonstop4h 55m
Sat 11/2810:20 am -
Nonstop5h 50m
Deal found 10/22![Air Canada logo]()
$277
This Super.com deal was found by Cheapflights users on 10/22. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/121:45 pm -
Nonstop4h 58m
Wed 11/189:50 am -
Nonstop5h 54m
Deal found 10/22![Porter Airlines logo]()
$278
This Booking.com deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” 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 11/261:45 pm -
Nonstop4h 58m
Thu 12/39:50 am -
Nonstop5h 57m
Deal found 10/26![Porter Airlines logo]()
$279
This Kiwi.com deal was found by Cheapflights users on 10/23. 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.
Sat 12/51:45 pm -
Nonstop4h 57m
Mon 12/149:50 am -
Nonstop5h 57m
Deal found 10/23![Porter Airlines logo]()
$280
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 October 27, 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 October 27, 2026.
This United Airlines deal was found by Cheapflights users on 10/23. 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.
Sun 11/1510:45 pm -
1 stop8h 02m
Thu 11/195:10 pm -
Nonstop5h 53m
Deal found 10/23![United Airlines logo]()
$335
This Alaska Airlines deal was found by Cheapflights users on 10/23. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/156:47 pm -
2 stops18h 18m
Thu 11/195:15 pm -
2 stops18h 46m
Deal found 10/23![Alaska Airlines logo]()
$365
This Air Canada deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” 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 1/186:30 am -
2 stops12h 22m
Thu 1/213:20 pm -
1 stop9h 00m
Deal found 10/26![Air Canada logo]()
$410
This United deal was found by Cheapflights users on 10/22. 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 United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/112:10 am -
1 stop6h 57m
Mon 12/710:45 am -
1 stop13h 48m
Deal found 10/22![Multiple Airlines logo]()
$460
This Trip.com deal was found by Cheapflights users on 10/22. 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.
Sun 12/61:45 pm -
1 stop7h 56m
Sun 12/137:00 am -
1 stop8h 47m
Deal found 10/22![Porter Airlines logo]()
$460
This Delta deal was found by Cheapflights users on 10/22. 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.
Thu 11/510:25 pm -
1 stop10h 54m
Sun 11/86:30 am -
1 stop7h 22m
Deal found 10/22![Delta logo]()
$482
This WestJet deal was found by Cheapflights users on 10/24. Clicking the “Pick Dates” 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 1/184:40 pm -
1 stop9h 55m
Thu 1/216:40 am -
1 stop12h 10m
Deal found 10/24![WestJet logo]()
$577
This Air Transat deal was found by Cheapflights users on 10/23. 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 Transat is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/141:45 pm -
1 stop7h 56m
Thu 1/77:00 am -
1 stop8h 45m
Deal found 10/23![Air Transat logo]()
$613
This United Airlines deal was found by Cheapflights users on 10/23. 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 2/1211:40 pm -
1 stop7h 26m
Sun 2/1412:10 pm -
1 stop10h 33m
Deal found 10/23![United Airlines logo]()
$413
This Alaska Airlines deal was found by Cheapflights users on 10/23. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/178:33 am -
1 stop28h 32m
Tue 12/85:15 pm -
2 stops23h 39m
Deal found 10/23![Alaska Airlines logo]()
$429
This United Airlines deal was found by Cheapflights users on 10/23. 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.
Wed 11/186:35 am -
1 stop7h 07m
Sun 11/223:20 pm -
1 stop9h 09m
Deal found 10/23![United Airlines logo]()
$413
This United deal was found by Cheapflights users on 10/22. 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 United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/126:35 am -
1 stop7h 07m
Wed 11/1812:30 pm -
1 stop12h 03m
Deal found 10/22![Multiple Airlines logo]()
$460
This Air Canada deal was found by Cheapflights users on 10/22. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/148:25 am -
1 stop9h 02m
Sat 11/219:05 pm -
1 stop17h 05m
Deal found 10/22![Air Canada logo]()
$474
This United deal was found by Cheapflights users on 10/23. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/611:40 pm -
1 stop7h 27m
Mon 12/1410:45 am -
1 stop13h 48m
Deal found 10/23![Multiple Airlines logo]()
$460
This United Airlines deal was found by Cheapflights users on 10/22. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/1211:40 pm -
1 stop7h 26m
Tue 2/1612:10 pm -
2 stops12h 07m
Deal found 10/22![United Airlines logo]()
$423
This Delta deal was found by Cheapflights users on 10/23. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 1/254:15 pm -
2 stops16h 14m
Sat 2/136:15 am -
2 stops19h 24m
Deal found 10/23![Delta logo]()
$558
This Porter Airlines deal was found by Cheapflights users on 10/24. Clicking the “Pick Dates” 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 11/161:45 pm -
1 stop7h 52m
Thu 11/197:00 am -
1 stop8h 44m
Deal found 10/24![Porter Airlines logo]()
$561
This Alaska Airlines deal was found by Cheapflights users on 10/25. Clicking the “Pick Dates” 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 11/2110:08 pm -
2 stops14h 57m
Mon 11/235:15 pm -
1 stop8h 31m
Deal found 10/25![Alaska Airlines logo]()
$517
This United deal was found by Cheapflights users on 10/23. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 1/97:09 pm -
2 stops11h 58m
Sun 1/178:20 am -
2 stops16h 13m
Deal found 10/23![Multiple Airlines logo]()
$476
This Air Canada deal was found by Cheapflights users on 10/25. Clicking the “Pick Dates” 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.
Sun 2/288:40 am -
1 stop7h 55m
Mon 3/1510:35 am -
1 stop8h 05m
Deal found 10/25![Air Canada logo]()
$554
This Alaska Airlines deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” 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 12/16:24 pm -
2 stops18h 41m
Tue 12/85:15 pm -
2 stops18h 45m
Deal found 10/26![Alaska Airlines logo]()
$522
This Kiwi.com deal was found by Cheapflights users on 10/22. 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 12/610:44 pm -
2 stops12h 48m
Sun 12/137:00 am -
1 stop8h 47m
Deal found 10/22![Multiple Airlines logo]()
$481
This United Airlines deal was found by Cheapflights users on 10/23. 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.
Tue 11/105:00 am -
1 stop8h 42m
Mon 11/163:20 pm -
1 stop9h 09m
Deal found 10/23![United Airlines logo]()
$484
This Delta deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” 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 12/215:20 pm -
2 stops14h 47m
Fri 12/256:30 am -
1 stop7h 47m
Deal found 10/26![Delta logo]()
$587
This CheapOair deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” 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.
Fri 12/114:40 pm -
1 stop28h 00m
Fri 12/186:10 am -
1 stop12h 40m
Deal found 10/26![WestJet logo]()
$703
This United deal was found by Cheapflights users on 10/23. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/1511:20 pm -
1 stop16h 37m
Thu 11/198:30 am -
1 stop16h 03m
Deal found 10/23![Multiple Airlines logo]()
$491
This United Airlines deal was found by Cheapflights users on 10/23. 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.
Wed 11/119:24 pm -
2 stops16h 18m
Mon 11/163:20 pm -
1 stop9h 09m
Deal found 10/23![United Airlines logo]()
$494
This Porter Airlines deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Porter Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/101:45 pm -
1 stop7h 56m
Thu 12/1712:15 pm -
2 stops13h 19m
Deal found 10/26![Porter Airlines logo]()
$682
This Air Canada deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” 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 12/1012:10 am -
2 stops11h 55m
Fri 12/1810:35 am -
1 stop8h 05m
Deal found 10/26![Air Canada logo]()
$659
This United Airlines deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/239:20 pm -
2 stops9h 27m
Fri 11/276:30 am -
Nonstop5h 59m
Deal found 10/26![United Airlines logo]()
$501
Last-minute flights from San Francisco to OntarioDiscover last-minute flight deals from San Francisco to Ontario. Data last updated October 27, 2026 and is based on user searches.
Discover last-minute flight deals from San Francisco to Ontario. Data last updated October 27, 2026 and is based on user searches.
This Flightnetwork deal was found by Cheapflights users on 10/22. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/126:30 am -
1 stop10h 27m
Wed 11/189:50 am -
Nonstop5h 54m
Deal found 10/22![Multiple Airlines logo]()
$274
This Flightnetwork deal was found by Cheapflights users on 10/22. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/124:40 pm -
Nonstop4h 49m
Wed 11/186:40 pm -
Nonstop5h 50m
Deal found 10/22![Air Canada logo]()
$276
This Super.com deal was found by Cheapflights users on 10/22. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/121:45 pm -
Nonstop4h 58m
Wed 11/189:50 am -
Nonstop5h 54m
Deal found 10/22![Porter Airlines logo]()
$278
This Trip.com deal was found by Cheapflights users on 10/24. Clicking the “Pick Dates” 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 11/141:45 pm -
Nonstop4h 58m
Wed 11/259:50 am -
Nonstop5h 54m
Deal found 10/24![Multiple Airlines logo]()
$282
This Kiwi.com deal was found by Cheapflights users on 10/23. 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.
Sat 11/141:45 pm -
Nonstop4h 58m
Tue 11/1711:30 am -
1 stop9h 49m
Deal found 10/23![Multiple Airlines logo]()
$284
This Justfly.com deal was found by Cheapflights users on 10/22. 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.
Tue 11/171:45 pm -
Nonstop4h 58m
Sun 11/229:50 am -
Nonstop5h 54m
Deal found 10/22![Porter Airlines logo]()
$290
This Air Canada deal was found by Cheapflights users on 10/22. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/2412:00 pm -
Nonstop4h 55m
Sat 11/2810:20 am -
Nonstop5h 50m
Deal found 10/22![Air Canada logo]()
$277
This Kiwi.com deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” 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 11/251:45 pm -
Nonstop4h 58m
Wed 12/29:50 am -
Nonstop5h 57m
Deal found 10/26![Porter Airlines logo]()
$287
This Booking.com deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” 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 11/261:45 pm -
Nonstop4h 58m
Thu 12/39:50 am -
Nonstop5h 57m
Deal found 10/26![Porter Airlines logo]()
$279
This Kiwi.com deal was found by Cheapflights users on 10/24. Clicking the “Pick Dates” 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 11/281:45 pm -
Nonstop4h 58m
Tue 12/89:50 am -
Nonstop5h 57m
Deal found 10/24![Porter Airlines logo]()
$265
This Kiwi.com deal was found by Cheapflights users on 10/24. Clicking the “Pick Dates” 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 11/281:45 pm -
Nonstop4h 58m
Sat 12/59:50 am -
Nonstop5h 57m
Deal found 10/24![Porter Airlines logo]()
$281
This Kiwi.com deal was found by Cheapflights users on 10/23. 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.
Sat 11/281:45 pm -
Nonstop4h 58m
Thu 12/39:50 am -
Nonstop5h 57m
Deal found 10/23![Multiple Airlines logo]()
$291
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 October 27, 2026.
Search for one-way flight options from San Francisco to Ontario. Find affordable one-way fares based on user searches. Data last updated October 27, 2026.
This United Airlines deal was found by Cheapflights users on 10/22. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/1710:16 am -
2 stops10h 43m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/22![United Airlines logo]()
$151
This Kiwi.com deal was found by Cheapflights users on 10/24. Clicking the “Pick Dates” 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 12/156:30 pm -
3 stops39h 20m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/24![Multiple Airlines logo]()
$151
This Super.com deal was found by Cheapflights users on 10/23. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/71:45 pm -
Nonstop4h 58m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/23![Porter Airlines logo]()
$152
This Kiwi.com deal was found by Cheapflights users on 10/22. 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 11/111:45 pm -
Nonstop4h 58m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/22![Porter Airlines logo]()
$153
This Kiwi.com deal was found by Cheapflights users on 10/24. Clicking the “Pick Dates” 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 12/156:30 pm -
3 stops32h 15m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/24![Multiple Airlines logo]()
$155
This Kiwi.com deal was found by Cheapflights users on 10/25. Clicking the “Pick Dates” 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 11/187:14 pm -
3 stops31h 31m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/25![Multiple Airlines logo]()
$156
This Air Canada deal was found by Cheapflights users on 10/23. 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.
Thu 12/38:25 am -
1 stop10h 11m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/23![Air Canada logo]()
$156
This Alaska Airlines deal was found by Cheapflights users on 10/22. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/156:47 pm -
2 stops18h 18m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/22![Alaska Airlines logo]()
$157
This Kiwi.com deal was found by Cheapflights users on 10/23. 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 11/177:14 pm -
3 stops25h 26m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/23![Multiple Airlines logo]()
$158
This SmartFares deal was found by Cheapflights users on 10/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/91:45 pm -
Nonstop4h 57m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/25![Air Transat logo]()
$159
This Air Canada deal was found by Cheapflights users on 10/22. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/138:25 am -
1 stop10h 11m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/22![Air Canada logo]()
$160
This Air Canada deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” 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 11/912:00 pm -
Nonstop4h 55m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/26![Air Canada logo]()
$161
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 October 27, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $262 (Super.com) |
One-way from | $151 (United Airlines) |
Popular in | December |
Cheapest in | January |
Average price | $498 |
Good round-trip deal | $439 or less |
Good one-way deal | $225 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from San Francisco to Ontario that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 7,457,451 searches. Data last updated October 27, 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 FranciscoToronto
SFO San Francisco - YYZ Toronto Pearson Intl
SFOYYZ
San Francisco
Mon 12/7
7:51 pm-9:47 am
2 stops10h 56m
Toronto Pearson Intl
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$151
San FranciscoToronto
SFO San Francisco - YYZ Toronto Pearson Intl
SFOYYZ
San Francisco
Sun 11/15
6:47 pm-4:05 pm
2 stops18h 18m
Toronto Pearson Intl
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$157
Quickest round-trip
San FranciscoToronto
SFO San Francisco - YTZ Toronto Island
SFOYTZ
San Francisco
Sun 12/6
11:40 pm-10:07 am
1 stop7h 27m
Toronto Island
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$171
San FranciscoToronto
SFO San Francisco - YTZ Toronto Island
SFOYTZ
San Francisco
Tue 2/16
10:45 pm-10:06 am
1 stop8h 21m
Toronto Island
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$171
San FranciscoToronto
SFO San Francisco - YTZ Toronto Island
SFOYTZ
San Francisco
Mon 2/15
10:45 pm-10:06 am
1 stop8h 21m
Toronto Island
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$171
San FranciscoToronto
SFO San Francisco - YTZ Toronto Island
SFOYTZ
San Francisco
Sun 11/15
6:15 am-6:57 pm
1 stop9h 42m
Toronto Island
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$173
San FranciscoToronto
SFO San Francisco - YTZ Toronto Island
SFOYTZ
San Francisco
Sun 1/24
10:40 pm-10:06 am
1 stop8h 26m
Toronto Island
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$173
San FranciscoToronto
SFO San Francisco - YTZ Toronto Island
SFOYTZ
San Francisco
Thu 11/19
6:15 am-6:57 pm
1 stop9h 42m
Toronto Island
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$173
San FranciscoToronto
SFO San Francisco - YTZ Toronto Island
SFOYTZ
San Francisco
Tue 11/17
5:00 am-4:42 pm
1 stop8h 42m
Toronto Island
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$173
San FranciscoToronto
SFO San Francisco - YYZ Toronto Pearson Intl
SFOYYZ
San Francisco
Mon 1/4
4:35 pm-11:28 am
2 stops15h 53m
Toronto Pearson Intl
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$178
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-YTZ
SFO-YXU
SFO-YOW
SFO-YSB
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-YTZ
SFO-YXU
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 $388). Flying from San Francisco to Region of Ontario in December is currently the most expensive (average of $596). 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 October 27, 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 29% 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 October 27, 2026.
The most flights from SFO to CAON are scheduled on a Sunday (20 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (6 on average).
How much does it cost to fly round-trip from San Francisco to Region of Ontario?
Airfare is below average for this route at the moment.
San Francisco to Region of Ontario flights typically cost between $403 and $729 in December.The cheapest round-trip price found within the last 5 days was $262 on Porter Airlines (Dec 4-Dec 10).
How far ahead should I book a flight from San Francisco to Region of Ontario?
The price you pay for your flight from San Francisco to Region of Ontario may vary depending on when you book. For the best chance of a lower fare, look to book 44 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.
What is the cheapest day to fly from San Francisco to Region of Ontario?
Use this chart to determine the cheapest time to fly round-trip from San Francisco to Ontario. Price data was last updated on October 24, 2026.
Travelers seeking maximum savings on their San Francisco to Region of Ontario flight should consider departing on Wednesday afternoons when fares are most often at their lowest. Monday 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 October 27, 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
Boarding
8.2
Food
7.6
Crew
8.6
Entertainment
6.9
Comfort
8.0
Reviews
1 / 20
6.0
GoodShannon,Jul 2026
YQT - YOW
Overall
8.0
Boarding
8.2
Food
7.6
Crew
8.6
Entertainment
6.9
Comfort
8.0
Reviews
1 / 20
6.0
GoodShannon,Jul 2026
YQT - YOW
Overall
8.0
Boarding
8.2
Food
7.6
Crew
8.6
Entertainment
6.9
Comfort
8.0
Reviews
1 / 20
6.0
GoodShannon,Jul 2026
YQT - YOW
Overall
8.0
Boarding
8.2
Food
7.6
Crew
8.6
Entertainment
6.9
Comfort
8.0
Reviews
1 / 20
6.0
GoodShannon,Jul 2026
YQT - YOW
Overall
8.0
Boarding
8.2
Food
7.6
Crew
8.6
Entertainment
6.9
Comfort
8.0
Reviews
1 / 20
6.0
GoodShannon,Jul 2026
YQT - YOW
Overall
8.0
Boarding
8.2
Food
7.6
Crew
8.6
Entertainment
6.9
Comfort
8.0
Reviews
1 / 20
6.0
GoodShannon,Jul 2026
YQT - YOW
Related info for your journey
Find useful and relevant information for your journey from San Francisco to Ontario. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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Alternative routes for San Francisco to Ontario
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Ontario by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from San Francisco to Ontario by cabin class
Find flights from San Francisco to Ontario, based on your preferred cabin class, be it economy, premium economy, business, or first class.
San Francisco and Ontario flights
Browse other San Francisco and Ontario flight options. Last updated on October 27, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
San Francisco to Ontario flights
Consider these flights traveling from San Francisco to Ontario.
Top 8 airlines flying from San Francisco to Ontario
Discover the top 8 airlines that operate flights from San Francisco to Ontario. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 7,457,451 searches. Data last updated October 27, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$158 | Average$478 | FlexibilityNo cancel fee | On-time60% | |
| Cheapest$160 | Average$503 | FlexibilityNo cancel fee | On-time50% | |
| Cheapest$162 | Average$478 | FlexibilityNo cancel fee | On-time52% | |
| Cheapest$202 | Average$415 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$215 | Average$702 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$338 | Average$404 | FlexibilityNo cancel fee | On-time68% | |
| Cheapest$402 | Average$802 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$454 | Average$621 | FlexibilityNo cancel fee | On-time71% |