$219+ Cheap flights from Oakland, CA (OAK) to Ontario
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/12. Fares are subject to change and may not be available on all flights or dates of travel.
OAK — YYZ
May 18 — May 251
Round-trip
1 adult, Economy
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Find cheap flights from Oakland to Ontario with Cheapflights
1. Tell us where you want to go
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Cheapest flights from Oakland to OntarioExplore the most affordable flight options available from Oakland to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 18, 2026.
Explore the most affordable flight options available from Oakland to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 18, 2026.
This Kiwi.com deal was found by Cheapflights users on 4/16. Clicking the “Pick Dates” 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 6/32:58 pm
OAK
- YYZ
2 stops26h 02m
Multiple Airlines
Sat 6/64:55 pm
YYZ
- OAK
1 stop10h 04m
Multiple Airlines
Deal found 4/16![Multiple Airlines logo]()
$462
This CheapOair deal was found by Cheapflights users on 4/16. Clicking the “Pick Dates” 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 5/86:20 am
OAK
- YYZ
1 stop30h 25m
Alaska Airlines
Tue 5/124:55 pm
YYZ
- OAK
1 stop20h 00m
Alaska Airlines
Deal found 4/16![Alaska Airlines logo]()
$502
This Delta deal was found by Cheapflights users on 4/13. Clicking the “Pick Dates” 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.
Sat 5/166:00 am
OAK
- YYZ
1 stop7h 35m
Delta
Sat 5/235:45 pm
YYZ
- OAK
1 stop7h 49m
Delta
Deal found 4/13![Delta logo]()
$518
This CheapOair deal was found by Cheapflights users on 4/14. Clicking the “Pick Dates” 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.
Thu 5/76:20 am
OAK
- YYZ
1 stop30h 25m
Alaska Airlines
Tue 5/124:55 pm
YYZ
- OAK
1 stop20h 00m
Alaska Airlines
Deal found 4/14![Alaska Airlines logo]()
$526
This Delta deal was found by Cheapflights users on 4/13. Clicking the “Pick Dates” 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.
Sat 5/166:00 am
OAK
- YYZ
1 stop7h 35m
Delta
Sun 5/246:10 am
YYZ
- OAK
2 stops13h 15m
Delta
Deal found 4/13![Delta logo]()
$528
This Delta deal was found by Cheapflights users on 4/13. Clicking the “Pick Dates” 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.
Sat 5/166:00 am
OAK
- YYZ
2 stops14h 14m
Delta
Fri 5/226:12 pm
YYZ
- OAK
2 stops8h 45m
Delta
Deal found 4/13![Delta logo]()
$533
This Delta deal was found by Cheapflights users on 4/14. Clicking the “Pick Dates” 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 6/106:00 am
OAK
- YYZ
2 stops14h 58m
Delta
Tue 6/165:45 pm
YYZ
- OAK
1 stop9h 09m
Delta
Deal found 4/14![Delta logo]()
$542
This Delta deal was found by Cheapflights users on 4/14. Clicking the “Pick Dates” 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 9/165:55 am
OAK
- YYZ
1 stop7h 50m
Delta
Mon 9/215:50 pm
YYZ
- OAK
1 stop8h 59m
Delta
Deal found 4/14![Delta logo]()
$546
This Alaska Airlines deal was found by Cheapflights users on 4/13. Clicking the “Pick Dates” 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 5/46:20 am
OAK
- YYZ
1 stop30h 25m
Alaska Airlines
Thu 5/144:55 pm
YYZ
- OAK
1 stop10h 04m
Alaska Airlines
Deal found 4/13![Alaska Airlines logo]()
$547
This Delta deal was found by Cheapflights users on 4/16. Clicking the “Pick Dates” 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 6/36:00 am
OAK
- YUL
2 stops14h 57m
Delta
Tue 6/1612:47 pm
YUL
- OAK
2 stops30h 36m
Delta
Deal found 4/16![Delta logo]()
$613
This Delta deal was found by Cheapflights users on 4/16. Clicking the “Pick Dates” 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.
Sat 6/612:28 pm
OAK
- YUL
2 stops32h 31m
Delta
Wed 6/107:00 am
YUL
- OAK
2 stops19h 54m
Delta
Deal found 4/16![Delta logo]()
$622
This Delta deal was found by Cheapflights users on 4/13. Clicking the “Pick Dates” 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 5/286:00 am
OAK
- YUL
2 stops26h 35m
Delta
Thu 6/47:10 am
YUL
- OAK
2 stops19h 47m
Delta
Deal found 4/13![Delta logo]()
$631
Best flights from Oakland to OntarioDiscover carefully curated flight deals from Oakland to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 18, 2026.
Discover carefully curated flight deals from Oakland to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 18, 2026.
This Delta deal was found by Cheapflights users on 4/13. Clicking the “Pick Dates” 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 5/45:04 pm
OAK
- YYZ
2 stops14h 15m
Delta
Mon 5/115:45 pm
YYZ
- OAK
1 stop9h 12m
Delta
Deal found 4/13![Delta logo]()
$542
This Alaska Airlines deal was found by Cheapflights users on 4/15. Clicking the “Pick Dates” 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 5/301:01 pm
OAK
- YYZ
1 stop23h 44m
Alaska Airlines
Sat 6/64:55 pm
YYZ
- OAK
1 stop10h 04m
Alaska Airlines
Deal found 4/15![Alaska Airlines logo]()
$599
This Kiwi.com deal was found by Cheapflights users on 4/13. Clicking the “Pick Dates” 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 5/286:02 am
OAK
- YUL
2 stops33h 13m
Multiple Airlines
Thu 6/411:01 am
YUL
- OAK
1 stop13h 43m
Multiple Airlines
Deal found 4/13![Multiple Airlines logo]()
$800
This Delta deal was found by Cheapflights users on 4/15. Clicking the “Pick Dates” 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 9/25:05 pm
OAK
- YYZ
2 stops16h 10m
Delta
Tue 9/85:50 pm
YYZ
- OAK
1 stop8h 59m
Delta
Deal found 4/15![Delta logo]()
$556
This Delta deal was found by Cheapflights users on 4/16. Clicking the “Pick Dates” 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 6/36:00 am
OAK
- YYZ
1 stop7h 35m
Delta
Thu 6/115:45 pm
YYZ
- OAK
1 stop9h 09m
Delta
Deal found 4/16![Delta logo]()
$556
This Alaska Airlines deal was found by Cheapflights users on 4/14. Clicking the “Pick Dates” 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 5/297:00 am
OAK
- YYZ
1 stop29h 45m
Alaska Airlines
Fri 6/54:55 pm
YYZ
- OAK
1 stop10h 04m
Alaska Airlines
Deal found 4/14![Alaska Airlines logo]()
$618
This Delta deal was found by Cheapflights users on 4/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/86:00 am
OAK
- YYZ
1 stop7h 35m
Delta
Mon 6/155:45 pm
YYZ
- OAK
1 stop9h 09m
Delta
Deal found 4/14![Delta logo]()
$566
This Alaska Airlines deal was found by Cheapflights users on 4/13. Clicking the “Pick Dates” 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 5/157:00 am
OAK
- YYZ
1 stop29h 45m
Alaska Airlines
Sat 5/234:55 pm
YYZ
- OAK
1 stop10h 04m
Alaska Airlines
Deal found 4/13![Alaska Airlines logo]()
$641
This Delta deal was found by Cheapflights users on 4/13. Clicking the “Pick Dates” 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 5/286:00 am
OAK
- YUL
2 stops26h 35m
Delta
Thu 6/47:10 am
YUL
- OAK
2 stops19h 47m
Delta
Deal found 4/13![Delta logo]()
$631
This Alaska Airlines deal was found by Cheapflights users on 4/16. Clicking the “Pick Dates” 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 6/37:00 am
OAK
- YYZ
1 stop29h 45m
Alaska Airlines
Tue 6/94:55 pm
YYZ
- OAK
1 stop10h 04m
Alaska Airlines
Deal found 4/16![Alaska Airlines logo]()
$699
This Mytrip deal was found by Cheapflights users on 4/17. Clicking the “Pick Dates” 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 6/111:30 pm
OAK
- YTZ
3 stops17h 45m
Multiple Airlines
Mon 6/88:55 pm
YTZ
- OAK
3 stops27h 30m
Multiple Airlines
Deal found 4/17![Multiple Airlines logo]()
$867
This Delta deal was found by Cheapflights users on 4/17. Clicking the “Pick Dates” 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.
Sat 5/3012:28 pm
OAK
- YUL
2 stops32h 13m
Delta
Thu 6/47:10 am
YUL
- OAK
2 stops19h 47m
Delta
Deal found 4/17![Delta logo]()
$631
This Alaska Airlines deal was found by Cheapflights users on 4/13. Clicking the “Pick Dates” 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 10/26:00 am
OAK
- YYZ
1 stop30h 45m
Alaska Airlines
Mon 10/54:55 pm
YYZ
- OAK
1 stop10h 04m
Alaska Airlines
Deal found 4/13![Alaska Airlines logo]()
$708
This Kiwi.com deal was found by Cheapflights users on 4/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/206:22 am
OAK
- YUL
2 stops21h 43m
Multiple Airlines
Fri 7/2411:01 am
YUL
- OAK
1 stop13h 43m
Multiple Airlines
Deal found 4/14![Multiple Airlines logo]()
$941
This Delta deal was found by Cheapflights users on 4/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/86:00 am
OAK
- YUL
2 stops14h 42m
Delta
Tue 6/167:00 am
YUL
- OAK
2 stops19h 54m
Delta
Deal found 4/17![Delta logo]()
$646
This Delta deal was found by Cheapflights users on 4/16. Clicking the “Pick Dates” 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.
Sat 6/612:28 pm
OAK
- YUL
2 stops32h 31m
Delta
Sat 6/137:00 am
YUL
- OAK
2 stops17h 34m
Delta
Deal found 4/16![Delta logo]()
$667
This Mytrip deal was found by Cheapflights users on 4/15. Clicking the “Pick Dates” 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.
Sat 5/3011:30 pm
OAK
- YOW
3 stops27h 05m
Multiple Airlines
Sat 6/68:45 am
YOW
- OAK
2 stops15h 59m
Multiple Airlines
Deal found 4/15![Multiple Airlines logo]()
$1,043
This Delta deal was found by Cheapflights users on 4/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/86:00 am
OAK
- YUL
2 stops14h 42m
Delta
Sat 6/137:00 am
YUL
- OAK
2 stops17h 34m
Delta
Deal found 4/16![Delta logo]()
$667
This Mytrip deal was found by Cheapflights users on 4/13. Clicking the “Pick Dates” 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 5/2911:30 pm
OAK
- YTZ
3 stops33h 30m
Multiple Airlines
Fri 6/55:00 pm
YTZ
- OAK
3 stops31h 44m
Multiple Airlines
Deal found 4/13![Multiple Airlines logo]()
$1,046
This Delta deal was found by Cheapflights users on 4/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/146:00 am
OAK
- YYZ
1 stop7h 35m
Delta
Fri 7/2412:25 pm
YYZ
- OAK
2 stops14h 26m
Delta
Deal found 4/13![Delta logo]()
$668
This Mytrip deal was found by Cheapflights users on 4/14. Clicking the “Pick Dates” 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 5/2911:30 pm
OAK
- YOW
2 stops15h 30m
Multiple Airlines
Fri 6/58:45 am
YOW
- OAK
2 stops15h 59m
Multiple Airlines
Deal found 4/14![Multiple Airlines logo]()
$1,069
This Delta deal was found by Cheapflights users on 4/16. Clicking the “Pick Dates” 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 6/45:05 pm
OAK
- YUL
2 stops27h 52m
Delta
Fri 6/127:00 am
YUL
- OAK
2 stops36h 23m
Delta
Deal found 4/16![Delta logo]()
$671
This Delta deal was found by Cheapflights users on 4/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/136:00 am
OAK
- YYZ
2 stops14h 14m
Delta
Sun 5/1712:09 pm
YYZ
- OAK
2 stops14h 48m
Delta
Deal found 4/16![Delta logo]()
$694
This Mytrip deal was found by Cheapflights users on 4/16. Clicking the “Pick Dates” 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.
Thu 6/2511:30 pm
OAK
- YTZ
3 stops19h 50m
Multiple Airlines
Sun 6/286:55 pm
YTZ
- OAK
3 stops29h 49m
Multiple Airlines
Deal found 4/16![Multiple Airlines logo]()
$1,193
This Delta deal was found by Cheapflights users on 4/16. Clicking the “Pick Dates” 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 6/45:05 pm
OAK
- YUL
2 stops27h 52m
Delta
Sat 6/136:00 am
YUL
- OAK
2 stops18h 34m
Delta
Deal found 4/16![Delta logo]()
$696
This Delta deal was found by Cheapflights users on 4/17. Clicking the “Pick Dates” 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 5/315:05 pm
OAK
- YUL
2 stops27h 36m
Delta
Thu 6/47:10 am
YUL
- OAK
2 stops19h 47m
Delta
Deal found 4/17![Delta logo]()
$721
This Mytrip deal was found by Cheapflights users on 4/16. Clicking the “Pick Dates” 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 8/511:15 pm
OAK
- YTZ
3 stops33h 45m
Multiple Airlines
Sat 8/810:55 am
YTZ
- OAK
3 stops34h 39m
Multiple Airlines
Deal found 4/16![Multiple Airlines logo]()
$1,341
This Delta deal was found by Cheapflights users on 4/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/712:33 pm
OAK
- YUL
2 stops32h 09m
Delta
Mon 6/157:00 am
YUL
- OAK
2 stops19h 54m
Delta
Deal found 4/16![Delta logo]()
$732
This Delta deal was found by Cheapflights users on 4/15. Clicking the “Pick Dates” 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 5/256:00 am
OAK
- YUL
2 stops14h 41m
Delta
Fri 5/2912:49 pm
YUL
- OAK
2 stops14h 08m
Delta
Deal found 4/15![Delta logo]()
$964
This Mytrip deal was found by Cheapflights users on 4/14. Clicking the “Pick Dates” 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.
Thu 4/3011:30 pm
OAK
- YTZ
3 stops19h 50m
Multiple Airlines
Sun 5/37:05 pm
YTZ
- OAK
3 stops29h 39m
Multiple Airlines
Deal found 4/14![Multiple Airlines logo]()
$1,927
Last-minute flights from Oakland to OntarioDiscover last-minute flight deals from Oakland to Ontario. Data last updated April 18, 2026 and is based on user searches.
Discover last-minute flight deals from Oakland to Ontario. Data last updated April 18, 2026 and is based on user searches.
This CheapOair deal was found by Cheapflights users on 4/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/286:20 am
OAK
- YYZ
1 stop30h 25m
Alaska Airlines
Wed 5/64:55 pm
YYZ
- OAK
1 stop8h 37m
Alaska Airlines
Deal found 4/13![Alaska Airlines logo]()
$555
This Delta deal was found by Cheapflights users on 4/13. Clicking the “Pick Dates” 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 5/45:04 pm
OAK
- YYZ
2 stops14h 15m
Delta
Mon 5/115:45 pm
YYZ
- OAK
1 stop9h 12m
Delta
Deal found 4/13![Delta logo]()
$542
This Alaska Airlines deal was found by Cheapflights users on 4/13. Clicking the “Pick Dates” 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 5/46:20 am
OAK
- YYZ
1 stop30h 25m
Alaska Airlines
Thu 5/144:55 pm
YYZ
- OAK
1 stop10h 04m
Alaska Airlines
Deal found 4/13![Alaska Airlines logo]()
$547
This CheapOair deal was found by Cheapflights users on 4/14. Clicking the “Pick Dates” 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.
Thu 5/76:20 am
OAK
- YYZ
1 stop30h 25m
Alaska Airlines
Tue 5/124:55 pm
YYZ
- OAK
1 stop20h 00m
Alaska Airlines
Deal found 4/14![Alaska Airlines logo]()
$526
This CheapOair deal was found by Cheapflights users on 4/16. Clicking the “Pick Dates” 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 5/86:20 am
OAK
- YYZ
1 stop30h 25m
Alaska Airlines
Tue 5/124:55 pm
YYZ
- OAK
1 stop20h 00m
Alaska Airlines
Deal found 4/16![Alaska Airlines logo]()
$502
This Kiwi.com deal was found by Cheapflights users on 4/16. Clicking the “Pick Dates” 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 5/116:55 pm
OAK
- YUL
2 stops16h 13m
Multiple Airlines
Fri 5/1511:01 am
YUL
- OAK
1 stop13h 43m
Multiple Airlines
Deal found 4/16![Multiple Airlines logo]()
$767
This Delta deal was found by Cheapflights users on 4/17. Clicking the “Pick Dates” 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.
Sat 5/166:00 am
OAK
- YYZ
1 stop7h 35m
Delta
Wed 5/205:45 pm
YYZ
- OAK
1 stop9h 12m
Delta
Deal found 4/17![Delta logo]()
$518
This Delta deal was found by Cheapflights users on 4/13. Clicking the “Pick Dates” 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.
Sat 5/166:00 am
OAK
- YYZ
1 stop7h 35m
Delta
Fri 5/2212:09 pm
YYZ
- OAK
2 stops14h 48m
Delta
Deal found 4/13![Delta logo]()
$528
This Delta deal was found by Cheapflights users on 4/13. Clicking the “Pick Dates” 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.
Sat 5/166:00 am
OAK
- YYZ
2 stops13h 59m
Delta
Sun 5/246:10 am
YYZ
- OAK
2 stops13h 15m
Delta
Deal found 4/13![Delta logo]()
$533
This Delta deal was found by Cheapflights users on 4/17. Clicking the “Pick Dates” 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.
Sat 5/165:55 pm
OAK
- YUL
2 stops27h 02m
Delta
Sat 5/237:10 am
YUL
- OAK
2 stops18h 24m
Delta
Deal found 4/17![Delta logo]()
$646
This Delta deal was found by Cheapflights users on 4/13. Clicking the “Pick Dates” 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 5/286:00 am
OAK
- YUL
2 stops26h 35m
Delta
Thu 6/47:10 am
YUL
- OAK
2 stops19h 47m
Delta
Deal found 4/13![Delta logo]()
$631
This Delta deal was found by Cheapflights users on 4/17. Clicking the “Pick Dates” 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 5/315:05 pm
OAK
- YUL
2 stops27h 36m
Delta
Thu 6/47:10 am
YUL
- OAK
2 stops19h 47m
Delta
Deal found 4/17![Delta logo]()
$721
One-way flights from Oakland to OntarioSearch for one-way flight options from Oakland to Ontario. Find affordable one-way fares based on user searches. Data last updated April 18, 2026.
Search for one-way flight options from Oakland to Ontario. Find affordable one-way fares based on user searches. Data last updated April 18, 2026.
This CheapOair deal was found by Cheapflights users on 4/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/128:10 pm
OAK
- YYZ
2 stops16h 35m
Alaska Airlines
Deal found 4/16![Alaska Airlines logo]()
$219
This Delta deal was found by Cheapflights users on 4/16. Clicking the “Pick Dates” 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.
Sat 5/96:00 am
OAK
- YYZ
1 stop7h 35m
Delta
Deal found 4/16![Delta logo]()
$230
This CheapOair deal was found by Cheapflights users on 4/14. Clicking the “Pick Dates” 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 5/86:20 am
OAK
- YYZ
1 stop30h 25m
Alaska Airlines
Deal found 4/14![Alaska Airlines logo]()
$236
This Delta deal was found by Cheapflights users on 4/15. Clicking the “Pick Dates” 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 5/266:00 am
OAK
- YYZ
2 stops14h 14m
Delta
Deal found 4/15![Delta logo]()
$241
This Kiwi.com deal was found by Cheapflights users on 4/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/262:58 pm
OAK
- YYZ
3 stops27h 17m
Multiple Airlines
Deal found 4/15![Multiple Airlines logo]()
$245
This Delta deal was found by Cheapflights users on 4/13. Clicking the “Pick Dates” 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 8/55:03 pm
OAK
- YYZ
2 stops12h 52m
Delta
Deal found 4/13![Delta logo]()
$249
This CheapOair deal was found by Cheapflights users on 4/14. Clicking the “Pick Dates” 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 5/157:00 am
OAK
- YYZ
1 stop29h 45m
Alaska Airlines
Deal found 4/14![Alaska Airlines logo]()
$250
This Delta deal was found by Cheapflights users on 4/15. Clicking the “Pick Dates” 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 5/245:55 pm
OAK
- YYZ
2 stops15h 24m
Delta
Deal found 4/15![Delta logo]()
$273
This Delta deal was found by Cheapflights users on 4/16. Clicking the “Pick Dates” 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 5/106:00 am
OAK
- YYZ
2 stops14h 14m
Delta
Deal found 4/16![Delta logo]()
$278
This CheapOair deal was found by Cheapflights users on 4/16. Clicking the “Pick Dates” 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.
Mon 5/46:20 am
OAK
- YYZ
1 stop30h 25m
Alaska Airlines
Deal found 4/16![Alaska Airlines logo]()
$289
This Delta deal was found by Cheapflights users on 4/13. Clicking the “Pick Dates” 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 5/2812:28 pm
OAK
- YUL
2 stops20h 07m
Delta
Deal found 4/13![Delta logo]()
$289
This Kiwi.com deal was found by Cheapflights users on 4/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/117:49 pm
OAK
- YTZ
2 stops17h 11m
Multiple Airlines
Deal found 4/13![Multiple Airlines logo]()
$306
Find flight deals from Oakland to Ontario
Keep the following information in mind while searching for Oakland to Ontario flight deals. Data was last updated April 18, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $462 (Kiwi.com) |
One-way from | $219 (CheapOair) |
Popular in | December |
Cheapest in | January |
Average price | $463 |
Cheapflights Fare Finder
Customize your flight search to find flights from Oakland to Ontario that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated April 18, 2026.
Use the filters below to find and compare flights from Oakland to Ontario that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
OaklandToronto
OAK - YYZ
OAKYYZ
Oakland
Mon 5/4
5:04 pm-10:19 am
2 stops14h 15m
Toronto Pearson Intl
Mon 5/11
5:45 pm-11:57 pm
1 stop9h 12m
$542
OaklandToronto
OAK - YYZ
OAKYYZ
Oakland
Wed 9/2
5:05 pm-12:15 pm
2 stops16h 10m
Toronto Pearson Intl
Tue 9/8
5:50 pm-11:49 pm
1 stop8h 59m
$556
Quickest round-trip
OaklandToronto
OAK - YYZ
OAKYYZ
Oakland
Wed 6/3
6:00 am-4:35 pm
1 stop7h 35m
Toronto Pearson Intl
Thu 6/11
5:45 pm-11:54 pm
1 stop9h 09m
$556
OaklandToronto
OAK - YYZ
OAKYYZ
Oakland
Mon 6/8
6:00 am-4:35 pm
1 stop7h 35m
Toronto Pearson Intl
Mon 6/15
5:45 pm-11:54 pm
1 stop9h 09m
$566
OaklandToronto
OAK - YYZ
OAKYYZ
Oakland
Sat 5/30
1:01 pm-3:45 pm
1 stop23h 44m
Toronto Pearson Intl
Sat 6/6
4:55 pm-11:59 pm
1 stop10h 04m
$599
OaklandToronto
OAK - YYZ
OAKYYZ
Oakland
Fri 5/29
7:00 am-3:45 pm
1 stop29h 45m
Toronto Pearson Intl
Fri 6/5
4:55 pm-11:59 pm
1 stop10h 04m
$618
OaklandMontreal
OAK - YUL
OAKYUL
Oakland
Thu 5/28
6:00 am-11:35 am
2 stops26h 35m
Montreal Pierre Elliott Trudeau Intl
Thu 6/4
7:10 am-11:57 pm
2 stops19h 47m
$631
OaklandMontreal
OAK - YUL
OAKYUL
Oakland
Sat 5/30
12:28 pm-11:41 pm
2 stops32h 13m
Montreal Pierre Elliott Trudeau Intl
Thu 6/4
7:10 am-11:57 pm
2 stops19h 47m
$631
OaklandToronto
OAK - YYZ
OAKYYZ
Oakland
Fri 5/15
7:00 am-3:45 pm
1 stop29h 45m
Toronto Pearson Intl
Sat 5/23
4:55 pm-11:59 pm
1 stop10h 04m
$641
OaklandMontreal
OAK - YUL
OAKYUL
Oakland
Mon 6/8
6:00 am-11:42 pm
2 stops14h 42m
Montreal Pierre Elliott Trudeau Intl
Tue 6/16
7:00 am-11:54 pm
2 stops19h 54m
$646
Showing 1-10 of 56 resultsSorted by cheapest first
Best time to book a flight from Oakland to Ontario
Have a flexible travel schedule? Discover the best time to fly to Ontario from Oakland with our price prediction graph.
OAK-YYZ
OAK-YUL
OAK-YTZ
OAK-YOW
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 Oakland to Ontario
OAK-CAON
OAK-YYZ
OAK-YUL
OAK-YTZ
OAK-YOW
No data available for this route at this time. Please check back soon.
Related info for your journey
Find useful and relevant information for your journey from Oakland 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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