$189+ Cheap flights from Ontario to San Francisco (SFO)
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.
YYZ — SFO
Nov 26 — Dec 31
Round-trip
1 adult, Economy
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Find cheap flights from Ontario to San Francisco 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 Ontario to San Francisco
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Cheapest flights from Ontario to San FranciscoExplore the most affordable flight options available from Ontario to San Francisco. 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 Ontario to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 27, 2026.
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.
Tue 12/156:00 am -
1 stop7h 58m
Sun 1/106:00 am -
1 stop7h 19m
Deal found 10/26![Delta logo]()
$289
This Justfly.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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/209:50 am -
Nonstop5h 54m
Wed 11/251:45 pm -
Nonstop4h 58m
Deal found 10/26![Multiple Airlines logo]()
$291
This Air Canada deal was found by Cheapflights users on 10/21. 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.
Fri 11/66:40 pm -
Nonstop5h 50m
Mon 11/1612:00 pm -
Nonstop4h 55m
Deal found 10/21![Air Canada logo]()
$294
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.
Fri 11/204:10 pm -
1 stop18h 38m
Tue 11/248:25 am -
1 stop10h 10m
Deal found 10/23![Multiple Airlines logo]()
$295
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.
Fri 12/48:00 am -
1 stop8h 51m
Wed 12/912:00 pm -
Nonstop4h 55m
Deal found 10/22![Air Canada logo]()
$296
This Alaska Airlines deal was found by Cheapflights users on 10/21. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/135:15 pm -
2 stops23h 31m
Tue 11/175:42 pm -
1 stop19h 23m
Deal found 10/21![Alaska Airlines logo]()
$298
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.
Thu 11/192:15 pm -
2 stops27h 19m
Wed 11/251:45 pm -
Nonstop4h 58m
Deal found 10/24![Multiple Airlines logo]()
$299
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 11/96:40 pm -
Nonstop5h 50m
Mon 11/1612:00 pm -
Nonstop4h 55m
Deal found 10/26![Air Canada logo]()
$300
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.
Tue 11/109:50 am -
Nonstop5h 54m
Wed 12/91:45 pm -
Nonstop4h 57m
Deal found 10/25![Porter Airlines logo]()
$301
This Justfly.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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/187:00 am -
1 stop8h 44m
Wed 12/91:45 pm -
1 stop7h 56m
Deal found 10/23![Porter Airlines logo]()
$302
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 12/16:15 am -
1 stop10h 36m
Tue 12/88:25 am -
Nonstop4h 49m
Deal found 10/22![Air Canada logo]()
$302
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.
Fri 11/135:15 pm -
2 stops18h 37m
Mon 11/164:46 pm -
2 stops20h 19m
Deal found 10/22![Alaska Airlines logo]()
$303
Best flights from Ontario to San FranciscoDiscover carefully curated flight deals from Ontario to San Francisco 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 Ontario to San Francisco that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 27, 2026.
This Air Canada 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/1410:35 am -
1 stop7h 55m
Tue 4/208:40 am -
1 stop7h 51m
Deal found 10/24![Air Canada logo]()
$291
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.
Fri 11/135:15 pm -
2 stops18h 37m
Mon 11/168:58 pm -
1 stop16h 07m
Deal found 10/22![Alaska Airlines logo]()
$298
This Delta deal was found by Cheapflights users on 10/21. 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 11/229:45 am -
1 stop11h 26m
Wed 12/21:36 pm -
1 stop6h 31m
Deal found 10/21![Delta logo]()
$314
This FlightHub 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/267:00 am -
1 stop8h 44m
Thu 12/31:45 pm -
1 stop7h 56m
Deal found 10/23![Porter Airlines logo]()
$323
This United Airlines deal was found by Cheapflights users on 10/21. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/182:55 pm -
1 stop12h 04m
Sun 12/275:00 am -
1 stop15h 59m
Deal found 10/21![United Airlines logo]()
$330
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.
Fri 1/2212:10 pm -
1 stop9h 55m
Sun 1/248:25 am -
1 stop10h 11m
Deal found 10/22![Multiple Airlines logo]()
$365
This FlightHub 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/185:30 am -
2 stops14h 20m
Thu 3/255:40 pm -
1 stop28h 00m
Deal found 10/26![WestJet logo]()
$449
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 1/149:15 am -
1 stop9h 25m
Wed 1/204:40 pm -
1 stop12h 57m
Deal found 10/23![Air Canada logo]()
$305
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 12/812:05 pm -
1 stop12h 42m
Tue 12/812:10 am -
1 stop13h 32m
Deal found 10/23![United Airlines logo]()
$335
This Porter 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 Porter Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/159:50 am -
Nonstop5h 54m
Wed 11/251:45 pm -
Nonstop4h 58m
Deal found 10/22![Porter Airlines logo]()
$363
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 1/1212:10 pm -
1 stop10h 45m
Sat 1/168:25 am -
1 stop10h 11m
Deal found 10/22![Multiple Airlines logo]()
$373
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.
Mon 11/93:35 pm -
1 stop10h 53m
Fri 11/139:20 pm -
2 stops9h 27m
Deal found 10/22![United Airlines logo]()
$342
This Justfly.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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/217:00 am -
1 stop8h 44m
Wed 12/21:45 pm -
1 stop7h 56m
Deal found 10/25![Porter Airlines logo]()
$377
This Alaska Airlines deal was found by Cheapflights users on 10/21. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/115:15 pm -
2 stops17h 12m
Mon 11/164:46 pm -
2 stops20h 19m
Deal found 10/21![Alaska Airlines logo]()
$417
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.
Thu 12/314:10 pm -
1 stop17h 43m
Wed 1/64:40 pm -
Nonstop4h 49m
Deal found 10/23![Multiple Airlines logo]()
$390
This Alaska Airlines deal was found by Cheapflights users on 10/21. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/185:15 pm -
2 stops18h 45m
Sun 11/224:37 pm -
2 stops20h 28m
Deal found 10/21![Alaska Airlines logo]()
$417
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.
Mon 11/93:20 pm -
1 stop9h 09m
Fri 11/135:00 am -
1 stop8h 42m
Deal found 10/22![United Airlines logo]()
$389
This FlightHub 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/157:00 am -
1 stop8h 45m
Mon 3/221:45 pm -
1 stop8h 05m
Deal found 10/23![Porter Airlines logo]()
$390
This FlightHub 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/175:15 pm -
1 stop26h 35m
Mon 3/225:40 pm -
2 stops27h 00m
Deal found 10/25![WestJet logo]()
$472
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.
Fri 11/133:20 pm -
1 stop9h 09m
Sun 11/158:25 am -
1 stop10h 11m
Deal found 10/23![Multiple Airlines logo]()
$391
This Air Canada deal was found by Cheapflights users on 10/21. 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 1/119:15 am -
2 stops15h 18m
Wed 1/136:30 am -
2 stops12h 22m
Deal found 10/21![Air Canada logo]()
$453
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.
Mon 11/93:20 pm -
1 stop9h 09m
Tue 11/245:00 am -
1 stop8h 42m
Deal found 10/23![United Airlines logo]()
$390
This Porter 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 Porter Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/97:00 am -
1 stop8h 47m
Fri 12/111:45 pm -
1 stop7h 56m
Deal found 10/25![Porter Airlines logo]()
$407
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.
Wed 12/165:30 am -
2 stops19h 14m
Tue 1/56:00 am -
2 stops14h 40m
Deal found 10/22![Delta logo]()
$547
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.
Fri 12/412:05 pm -
1 stop10h 20m
Sun 12/68:25 am -
1 stop10h 11m
Deal found 10/22![Multiple Airlines logo]()
$425
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 11/85:55 pm -
1 stop9h 58m
Thu 11/127:51 pm -
2 stops10h 56m
Deal found 10/23![United Airlines logo]()
$393
This Porter 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 Porter Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 1/89:50 am -
Nonstop5h 55m
Sun 1/101:45 pm -
Nonstop4h 54m
Deal found 10/25![Porter Airlines logo]()
$408
This Air Canada 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/103:20 pm -
2 stops10h 38m
Mon 12/146:53 pm -
2 stops10h 39m
Deal found 10/24![Air Canada logo]()
$536
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.
Thu 11/123:20 pm -
1 stop9h 09m
Sun 11/158:25 am -
1 stop10h 11m
Deal found 10/23![Multiple Airlines logo]()
$443
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.
Thu 11/193:35 pm -
2 stops10h 31m
Sun 11/227:51 pm -
2 stops10h 56m
Deal found 10/26![United Airlines logo]()
$403
Last-minute flights from Ontario to San FranciscoDiscover last-minute flight deals from Ontario to San Francisco. Data last updated October 27, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to San Francisco. Data last updated October 27, 2026 and is based on user searches.
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.
Thu 11/59:50 am -
Nonstop5h 54m
Wed 11/111:45 pm -
Nonstop4h 58m
Deal found 10/22![Porter Airlines logo]()
$304
This Air Canada deal was found by Cheapflights users on 10/21. 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.
Fri 11/66:40 pm -
Nonstop5h 50m
Mon 11/1612:00 pm -
Nonstop4h 55m
Deal found 10/21![Air Canada logo]()
$294
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 11/96:40 pm -
Nonstop5h 50m
Mon 11/1612:00 pm -
Nonstop4h 55m
Deal found 10/26![Air Canada logo]()
$300
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.
Tue 11/109:50 am -
Nonstop5h 54m
Wed 12/91:45 pm -
Nonstop4h 57m
Deal found 10/25![Porter Airlines logo]()
$301
This Alaska Airlines deal was found by Cheapflights users on 10/21. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/135:15 pm -
2 stops23h 31m
Tue 11/175:42 pm -
1 stop19h 23m
Deal found 10/21![Alaska Airlines logo]()
$298
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.
Fri 11/135:15 pm -
2 stops18h 37m
Mon 11/164:46 pm -
2 stops20h 19m
Deal found 10/22![Alaska Airlines logo]()
$303
This American 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/142:01 pm -
1 stop9h 47m
Tue 12/111:07 pm -
1 stop8h 12m
Deal found 10/22![American Airlines logo]()
$302
This Justfly.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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/187:00 am -
1 stop8h 44m
Wed 12/91:45 pm -
1 stop7h 56m
Deal found 10/23![Porter Airlines logo]()
$302
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.
Thu 11/192:15 pm -
2 stops27h 19m
Wed 11/251:45 pm -
Nonstop4h 58m
Deal found 10/24![Multiple Airlines logo]()
$299
This Justfly.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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/209:50 am -
Nonstop5h 54m
Wed 11/251:45 pm -
Nonstop4h 58m
Deal found 10/26![Multiple Airlines logo]()
$291
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.
Fri 11/204:10 pm -
1 stop18h 38m
Tue 11/248:25 am -
1 stop10h 10m
Deal found 10/23![Multiple Airlines logo]()
$295
This FlightHub 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/227:30 am -
1 stop11h 20m
Thu 11/261:45 pm -
Nonstop4h 58m
Deal found 10/26![Multiple Airlines logo]()
$296
One-way flights from Ontario to San FranciscoSearch for one-way flight options from Ontario to San Francisco. Find affordable one-way fares based on user searches. Data last updated October 27, 2026.
Search for one-way flight options from Ontario to San Francisco. Find affordable one-way fares based on user searches. Data last updated October 27, 2026.
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 11/179:10 am -
3 stops26h 09m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/23![Multiple Airlines logo]()
$189
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.
Thu 11/195:15 pm -
2 stops18h 46m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/22![Alaska Airlines logo]()
$189
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.
Sun 11/229:10 am -
3 stops28h 51m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/23![Multiple Airlines logo]()
$190
This Super.com deal was found by Cheapflights users on 10/21. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 1/89:50 am -
Nonstop5h 55m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/21![Porter Airlines logo]()
$191
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.
Wed 11/119:50 am -
Nonstop5h 54m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/24![Porter Airlines logo]()
$192
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.
Fri 11/612:50 pm -
Nonstop5h 50m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/22![Air Canada logo]()
$193
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 12/53:20 pm -
1 stop9h 10m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/22![Air Canada logo]()
$193
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.
Wed 3/3110:45 am -
1 stop13h 37m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/22![Air Canada logo]()
$194
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.
Sat 12/510:15 am -
2 stops12h 22m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/26![Multiple Airlines logo]()
$194
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.
Wed 11/116:00 am -
1 stop11h 26m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/26![Delta logo]()
$194
This Trip.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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/97:00 am -
1 stop8h 47m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/25![Porter Airlines logo]()
$195
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.
Sat 11/214:20 pm -
2 stops11h 33m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/23![United Airlines logo]()
$195
Find flight deals from Ontario to San Francisco
Keep the following information in mind while searching for Ontario to San Francisco flight deals. Data was last updated October 27, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $287 (Cheapflightsfares) |
One-way from | $189 (Kiwi.com) |
Popular in | July |
Cheapest in | January |
Average price | $408 |
Good round-trip deal | $398 or less |
Good one-way deal | $256 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Ontario to San Francisco 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 Ontario to San Francisco that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
TorontoSan Francisco
YTZ Toronto Island - SFO San Francisco
YTZSFO
Toronto Island
Sat 1/9
10:35 am-4:26 pm
1 stop8h 51m
San Francisco
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$197
OttawaSan Francisco
YOW Ottawa - SFO San Francisco
YOWSFO
Ottawa
Mon 12/7
7:00 am-12:47 pm
1 stop8h 47m
San Francisco
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$203
TorontoSan Francisco
YTZ Toronto Island - SFO San Francisco
YTZSFO
Toronto Island
Thu 4/1
12:10 pm-8:10 pm
2 stops11h 00m
San Francisco
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$204
TorontoSan Francisco
YTZ Toronto Island - SFO San Francisco
YTZSFO
Toronto Island
Thu 12/10
3:20 pm-9:50 pm
1 stop9h 30m
San Francisco
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$204
TorontoSan Francisco
YTZ Toronto Island - SFO San Francisco
YTZSFO
Toronto Island
Tue 3/30
12:10 pm-8:10 pm
2 stops11h 00m
San Francisco
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$204
TorontoSan Francisco
YTZ Toronto Island - SFO San Francisco
YTZSFO
Toronto Island
Wed 12/2
6:30 pm-1:15 pm
2 stops21h 45m
San Francisco
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$204
TorontoSan Francisco
YTZ Toronto Island - SFO San Francisco
YTZSFO
Toronto Island
Fri 2/12
3:15 pm-1:16 am
1 stop13h 01m
San Francisco
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$204
TorontoSan Francisco
YTZ Toronto Island - SFO San Francisco
YTZSFO
Toronto Island
Mon 12/7
6:30 pm-11:36 am
2 stops20h 06m
San Francisco
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$204
TorontoSan Francisco
YYZ Toronto Pearson Intl - SFO San Francisco
YYZSFO
Toronto Pearson Intl
Tue 11/10
12:15 pm-8:58 pm
1 stop11h 43m
San Francisco
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$205
TorontoSan Francisco
YTZ Toronto Island - SFO San Francisco
YTZSFO
Toronto Island
Sun 4/4
10:35 am-4:33 pm
1 stop8h 58m
San Francisco
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$211
Showing 1-10 of 60 resultsSorted by cheapest first
Best time to book a flight from Ontario to San Francisco
Have a flexible travel schedule? Discover the best time to fly to San Francisco from Ontario with our price prediction graph.
YYZ-SFO
YOW-SFO
YTZ-SFO
YXU-SFO
YSB-SFO
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 Ontario to San Francisco
CAON-SFO
YYZ-SFO
YOW-SFO
YTZ-SFO
YXU-SFO
What is the cheapest month to book a flight from Region of Ontario to San Francisco?
Currently, January is the cheapest month in which you can book a flight from Region of Ontario to San Francisco (average of $367). Flying from Region of Ontario to San Francisco in August is currently the most expensive (average of $489). 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 ON to SFO?
Find hourly flight availability from Ontario to San Francisco. 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.
Unlike in the afternoon, when flights are generally more expensive, you can save up to 65% on flights from Region of Ontario to San Francisco by exploring options for tickets in the evening.
Weekly flight availability from Region of Ontario to San Francisco
Explore weekly flight availability from Ontario to San Francisco. 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 CAON to SFO are scheduled on a Tuesday (17 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (11 on average).
How much does it cost to fly round-trip from Region of Ontario to San Francisco?
Airfare is below average for this route at the moment.
Region of Ontario to San Francisco flights typically cost between $334 and $474 in February.The cheapest round-trip price found within the last 5 days was $287 on Air Transat (Feb 8-Feb 28).
How far ahead should I book a flight from Region of Ontario to San Francisco?
Booking 54 days in advance of your planned departure date is, on average, the best time to get cheap flights from Region of Ontario to San Francisco. The general trend is that the closer you book to the departure date, the more expensive your flight will be.
Related info for your journey
Find useful and relevant information for your journey from Ontario to San Francisco. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Traveling to a place near San Francisco?
Book flights to San Francisco if you plan to visit one of these locationsSouth San Francisco
Santa Clara
Santa Cruz
Walnut Creek
Hayward
Emeryville
Newark
Burlingame
Rancho Cordova
Vallejo
Cupertino
Fairfield
Redwood City
Manteca
San Bruno
San Carlos
San Ramon
Turlock
Davis
Morgan Hill
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
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Alternative routes for Ontario to San Francisco
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to San Francisco by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Ontario to San Francisco by cabin class
Find flights from Ontario to San Francisco, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Ontario and San Francisco flights
Browse other Ontario and San Francisco flight options. Last updated on October 27, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Other flights to San Francisco
Explore flights to San Francisco departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on October 27, 2026.
Ontario to San Francisco flights
Consider these flights traveling from Ontario to San Francisco.
Top 7 airlines flying from Ontario to San Francisco
Discover the top 7 airlines that operate flights from Ontario to San Francisco. 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$212 | Average$372 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$219 | Average$574 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$237 | Average$351 | FlexibilityNo cancel fee | On-time60% | |
| Cheapest$264 | Average$457 | FlexibilityNo cancel fee | On-time52% | |
| Cheapest$325 | Average$450 | FlexibilityNo cancel fee | On-time50% | |
| Cheapest$339 | Average$480 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$352 | Average$497 | FlexibilityNo cancel fee | On-time69% |