$185+ 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 6/24. Fares are subject to change and may not be available on all flights or dates of travel.
OAK — YYZ
May 10 — May 171
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
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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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 10, 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 10, 2026.
This Alaska Airlines deal was found by Cheapflights users on 4/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/56:20 am
OAK
- YYZ
1 stop30h 25m
Alaska Airlines
Tue 5/124:55 pm
YYZ
- OAK
1 stop8h 37m
Alaska Airlines
Deal found 4/6![Alaska Airlines logo]()
$448
This CheapOair deal was found by Cheapflights users on 4/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure 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 stop8h 37m
Alaska Airlines
Deal found 4/6![Alaska Airlines logo]()
$475
This Alaska Airlines deal was found by Cheapflights users on 4/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/122:09 pm
OAK
- YYZ
1 stop22h 36m
Alaska Airlines
Tue 5/194:55 pm
YYZ
- OAK
1 stop10h 04m
Alaska Airlines
Deal found 4/9![Alaska Airlines logo]()
$485
This Delta deal was found by Cheapflights users on 4/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/26:00 am
OAK
- YYZ
1 stop7h 35m
Delta
Wed 6/105:45 pm
YYZ
- OAK
1 stop9h 09m
Delta
Deal found 4/7![Delta logo]()
$496
This Delta deal was found by Cheapflights users on 4/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/155:55 am
OAK
- YYZ
1 stop7h 44m
Delta
Tue 10/205:50 pm
YYZ
- OAK
1 stop9h 06m
Delta
Deal found 4/6![Delta logo]()
$503
This CheapOair deal was found by Cheapflights users on 4/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/296:20 am
OAK
- YYZ
1 stop30h 25m
Alaska Airlines
Sun 5/34:55 pm
YYZ
- OAK
1 stop32h 37m
Alaska Airlines
Deal found 4/7![Alaska Airlines logo]()
$507
This CheapOair deal was found by Cheapflights users on 4/5. Clicking the “Pick Dates” 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.
Sun 5/106:20 am
OAK
- YYZ
1 stop30h 25m
Alaska Airlines
Thu 5/284:55 pm
YYZ
- OAK
1 stop10h 04m
Alaska Airlines
Deal found 4/5![Alaska Airlines logo]()
$512
This Delta deal was found by Cheapflights users on 4/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/912:33 pm
OAK
- YUL
2 stops32h 09m
Delta
Tue 6/166:00 am
YUL
- OAK
2 stops20h 54m
Delta
Deal found 4/8![Delta logo]()
$589
This Delta deal was found by Cheapflights users on 4/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/85:03 pm
OAK
- YUL
2 stops27h 39m
Delta
Wed 6/177:00 am
YUL
- OAK
2 stops19h 54m
Delta
Deal found 4/8![Delta logo]()
$598
This Delta deal was found by Cheapflights users on 4/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/116:00 am
OAK
- YUL
2 stops26h 57m
Delta
Tue 6/166:00 am
YUL
- OAK
2 stops20h 54m
Delta
Deal found 4/8![Delta logo]()
$602
This Delta deal was found by Cheapflights users on 4/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/25:05 pm
OAK
- YUL
2 stops27h 52m
Delta
Wed 6/107:00 am
YUL
- OAK
2 stops19h 54m
Delta
Deal found 4/7![Delta logo]()
$609
This Delta deal was found by Cheapflights users on 4/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/96:00 am
OAK
- YUL
2 stops14h 42m
Delta
Wed 6/177:00 am
YUL
- OAK
2 stops19h 54m
Delta
Deal found 4/9![Delta logo]()
$610
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 10, 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 10, 2026.
This Alaska Airlines deal was found by Cheapflights users on 4/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/59:33 am
OAK
- YYZ
2 stops27h 12m
Alaska Airlines
Tue 5/124:55 pm
YYZ
- OAK
1 stop8h 37m
Alaska Airlines
Deal found 4/6![Alaska Airlines logo]()
$452
This Delta deal was found by Cheapflights users on 4/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/55:55 am
OAK
- YYZ
2 stops9h 36m
Delta
Tue 5/122:20 pm
YYZ
- OAK
2 stops12h 37m
Delta
Deal found 4/6![Delta logo]()
$511
This Mytrip deal was found by Cheapflights users on 4/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/2511:59 pm
OAK
- YTZ
3 stops18h 49m
Multiple Airlines
Wed 5/274:00 pm
YTZ
- OAK
3 stops32h 44m
Multiple Airlines
Deal found 4/6![Multiple Airlines logo]()
$852
This Alaska Airlines deal was found by Cheapflights users on 4/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/296:20 am
OAK
- YYZ
1 stop30h 25m
Alaska Airlines
Mon 5/44:55 pm
YYZ
- OAK
1 stop8h 37m
Alaska Airlines
Deal found 4/8![Alaska Airlines logo]()
$518
This Delta deal was found by Cheapflights users on 4/5. Clicking the “Pick Dates” 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 7/75:03 pm
OAK
- YYZ
2 stops12h 52m
Delta
Thu 7/912:09 pm
YYZ
- OAK
2 stops14h 42m
Delta
Deal found 4/5![Delta logo]()
$560
This Alaska Airlines deal was found by Cheapflights users on 4/5. Clicking the “Pick Dates” 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 5/26:20 am
OAK
- YYZ
1 stop30h 25m
Alaska Airlines
Wed 5/64:55 pm
YYZ
- OAK
1 stop8h 37m
Alaska Airlines
Deal found 4/5![Alaska Airlines logo]()
$546
This Delta deal was found by Cheapflights users on 4/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/255:03 pm
OAK
- YYZ
2 stops15h 16m
Delta
Wed 7/15:45 pm
YYZ
- OAK
1 stop9h 09m
Delta
Deal found 4/9![Delta logo]()
$567
This Delta deal was found by Cheapflights users on 4/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/112:28 pm
OAK
- YUL
2 stops31h 45m
Delta
Wed 6/107:00 am
YUL
- OAK
2 stops19h 54m
Delta
Deal found 4/7![Delta logo]()
$618
This Delta deal was found by Cheapflights users on 4/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/236:00 am
OAK
- YYZ
2 stops14h 58m
Delta
Sat 5/305:45 pm
YYZ
- OAK
1 stop7h 49m
Delta
Deal found 4/8![Delta logo]()
$619
This KAYAK deal was found by Cheapflights users on 4/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/292:09 pm
OAK
- YHM
2 stops25h 51m
Multiple Airlines
Mon 5/49:10 am
YHM
- OAK
2 stops31h 05m
Multiple Airlines
Deal found 4/8![Multiple Airlines logo]()
$896
This Delta deal was found by Cheapflights users on 4/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/712:28 pm
OAK
- YUL
2 stops31h 45m
Delta
Wed 5/136:00 am
YUL
- OAK
2 stops20h 57m
Delta
Deal found 4/10![Delta logo]()
$622
This Delta deal was found by Cheapflights users on 4/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/612:34 pm
OAK
- YUL
2 stops20h 01m
Delta
Sat 5/167:00 am
YUL
- OAK
2 stops18h 34m
Delta
Deal found 4/10![Delta logo]()
$622
This Delta deal was found by Cheapflights users on 4/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/276:00 am
OAK
- YYZ
2 stops14h 14m
Delta
Tue 7/1412:25 pm
YYZ
- OAK
2 stops14h 26m
Delta
Deal found 4/9![Delta logo]()
$624
This KAYAK deal was found by Cheapflights users on 4/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/2410:35 am
OAK
- YOW
2 stops16h 09m
Multiple Airlines
Tue 5/268:35 am
YOW
- OAK
2 stops18h 24m
Multiple Airlines
Deal found 4/8![Multiple Airlines logo]()
$1,066
This Delta deal was found by Cheapflights users on 4/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure 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 36m
Delta
Wed 6/107:00 am
YUL
- OAK
2 stops19h 54m
Delta
Deal found 4/7![Delta logo]()
$630
This Mytrip deal was found by Cheapflights users on 4/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/2511:30 pm
OAK
- YOW
2 stops15h 30m
Multiple Airlines
Wed 5/276:55 am
YOW
- OAK
3 stops17h 49m
Multiple Airlines
Deal found 4/10![Multiple Airlines logo]()
$1,068
This Delta deal was found by Cheapflights users on 4/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/65:55 pm
OAK
- YUL
2 stops27h 04m
Delta
Thu 6/187:00 am
YUL
- OAK
2 stops19h 54m
Delta
Deal found 4/9![Delta logo]()
$632
This Delta deal was found by Cheapflights users on 4/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/25:05 pm
OAK
- YUL
2 stops27h 52m
Delta
Sun 6/77:00 am
YUL
- OAK
2 stops19h 54m
Delta
Deal found 4/7![Delta logo]()
$636
This Travelocity deal was found by Cheapflights users on 4/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/212:09 pm
OAK
- YHM
2 stops14h 01m
Multiple Airlines
Sun 8/237:25 am
YHM
- OAK
2 stops14h 30m
Multiple Airlines
Deal found 4/5![Multiple Airlines logo]()
$1,140
This Delta deal was found by Cheapflights users on 4/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure 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 36m
Delta
Mon 6/86:00 am
YUL
- OAK
2 stops20h 54m
Delta
Deal found 4/7![Delta logo]()
$639
This KAYAK deal was found by Cheapflights users on 4/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/217:00 am
OAK
- YOW
2 stops19h 44m
Multiple Airlines
Sat 5/238:35 am
YOW
- OAK
2 stops18h 24m
Multiple Airlines
Deal found 4/8![Multiple Airlines logo]()
$1,190
This Delta deal was found by Cheapflights users on 4/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/106:00 am
OAK
- YUL
2 stops26h 35m
Delta
Wed 5/136:00 am
YUL
- OAK
2 stops20h 57m
Delta
Deal found 4/10![Delta logo]()
$640
This Mytrip deal was found by Cheapflights users on 4/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/911:30 pm
OAK
- YTZ
3 stops19h 50m
Multiple Airlines
Tue 8/184:55 pm
YTZ
- OAK
3 stops31h 30m
Multiple Airlines
Deal found 4/9![Multiple Airlines logo]()
$1,203
This Delta deal was found by Cheapflights users on 4/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/155:03 pm
OAK
- YUL
2 stops27h 37m
Delta
Mon 7/207:00 am
YUL
- OAK
2 stops36h 22m
Delta
Deal found 4/9![Delta logo]()
$651
This KAYAK deal was found by Cheapflights users on 4/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/217:00 am
OAK
- YOW
2 stops19h 44m
Multiple Airlines
Wed 5/2711:00 am
YOW
- OAK
2 stops15h 59m
Multiple Airlines
Deal found 4/8![Multiple Airlines logo]()
$1,205
This Delta deal was found by Cheapflights users on 4/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure 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 36m
Delta
Sun 6/76:00 am
YUL
- OAK
2 stops20h 54m
Delta
Deal found 4/7![Delta logo]()
$657
This Expedia deal was found by Cheapflights users on 4/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/2510:35 am
OAK
- YOW
2 stops16h 09m
Multiple Airlines
Tue 5/268:35 am
YOW
- OAK
2 stops18h 24m
Multiple Airlines
Deal found 4/10![Multiple Airlines logo]()
$1,227
This Delta deal was found by Cheapflights users on 4/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/265:55 am
OAK
- YUL
2 stops26h 43m
Delta
Thu 4/307:00 am
YUL
- OAK
2 stops19h 54m
Delta
Deal found 4/8![Delta logo]()
$663
This KAYAK deal was found by Cheapflights users on 4/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/237:47 pm
OAK
- YOW
2 stops21h 13m
Multiple Airlines
Tue 5/268:35 am
YOW
- OAK
2 stops18h 24m
Multiple Airlines
Deal found 4/8![Multiple Airlines logo]()
$1,235
This Delta deal was found by Cheapflights users on 4/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/155:03 pm
OAK
- YUL
2 stops27h 56m
Delta
Thu 6/187:00 am
YUL
- OAK
2 stops19h 54m
Delta
Deal found 4/9![Delta logo]()
$672
Last-minute flights from Oakland to OntarioDiscover last-minute flight deals from Oakland to Ontario. Data last updated April 10, 2026 and is based on user searches.
Discover last-minute flight deals from Oakland to Ontario. Data last updated April 10, 2026 and is based on user searches.
This Delta deal was found by Cheapflights users on 4/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/225:55 am
OAK
- YUL
2 stops14h 56m
Delta
Tue 5/512:42 pm
YUL
- OAK
2 stops30h 42m
Delta
Deal found 4/8![Delta logo]()
$654
This CheapOair deal was found by Cheapflights users on 4/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/296:20 am
OAK
- YYZ
1 stop30h 25m
Alaska Airlines
Sun 5/34:55 pm
YYZ
- OAK
1 stop32h 37m
Alaska Airlines
Deal found 4/7![Alaska Airlines logo]()
$507
This Alaska Airlines deal was found by Cheapflights users on 4/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/56:20 am
OAK
- YYZ
1 stop30h 25m
Alaska Airlines
Tue 5/124:55 pm
YYZ
- OAK
1 stop8h 37m
Alaska Airlines
Deal found 4/6![Alaska Airlines logo]()
$448
This Delta deal was found by Cheapflights users on 4/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/612:34 pm
OAK
- YUL
2 stops20h 01m
Delta
Tue 5/127:00 am
YUL
- OAK
2 stops19h 57m
Delta
Deal found 4/10![Delta logo]()
$613
This Delta deal was found by Cheapflights users on 4/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/612:34 pm
OAK
- YUL
2 stops20h 01m
Delta
Thu 5/147:00 am
YUL
- OAK
2 stops19h 57m
Delta
Deal found 4/10![Delta logo]()
$622
This Delta deal was found by Cheapflights users on 4/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/712:28 pm
OAK
- YUL
2 stops31h 45m
Delta
Sat 5/167:00 am
YUL
- OAK
2 stops18h 34m
Delta
Deal found 4/10![Delta logo]()
$631
This CheapOair deal was found by Cheapflights users on 4/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure 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 stop8h 37m
Alaska Airlines
Deal found 4/6![Alaska Airlines logo]()
$475
This CheapOair deal was found by Cheapflights users on 4/5. Clicking the “Pick Dates” 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.
Sun 5/106:20 am
OAK
- YYZ
1 stop30h 25m
Alaska Airlines
Thu 5/284:55 pm
YYZ
- OAK
1 stop10h 04m
Alaska Airlines
Deal found 4/5![Alaska Airlines logo]()
$512
This Delta deal was found by Cheapflights users on 4/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/106:00 am
OAK
- YUL
2 stops26h 35m
Delta
Wed 5/136:00 am
YUL
- OAK
2 stops20h 57m
Delta
Deal found 4/10![Delta logo]()
$640
This Delta deal was found by Cheapflights users on 4/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/106:00 am
OAK
- YUL
2 stops26h 35m
Delta
Thu 5/147:00 am
YUL
- OAK
2 stops19h 57m
Delta
Deal found 4/10![Delta logo]()
$649
This Alaska Airlines deal was found by Cheapflights users on 4/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/122:09 pm
OAK
- YYZ
1 stop22h 36m
Alaska Airlines
Tue 5/194:55 pm
YYZ
- OAK
1 stop10h 04m
Alaska Airlines
Deal found 4/9![Alaska Airlines logo]()
$485
This Delta deal was found by Cheapflights users on 4/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/266:00 am
OAK
- YYZ
1 stop7h 35m
Delta
Sat 5/305:45 pm
YYZ
- OAK
1 stop7h 49m
Delta
Deal found 4/7![Delta logo]()
$496
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 10, 2026.
Search for one-way flight options from Oakland to Ontario. Find affordable one-way fares based on user searches. Data last updated April 10, 2026.
This Kiwi.com deal was found by Cheapflights users on 4/5. Clicking the “Pick Dates” 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 6/247:52 am
OAK
- YYZ
2 stops14h 13m
Multiple Airlines
Deal found 4/5![Multiple Airlines logo]()
$185
This CheapOair deal was found by Cheapflights users on 4/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/306:20 am
OAK
- YYZ
1 stop30h 25m
Alaska Airlines
Deal found 4/7![Alaska Airlines logo]()
$214
This CheapOair deal was found by Cheapflights users on 4/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/69:33 am
OAK
- YYZ
2 stops27h 12m
Alaska Airlines
Deal found 4/10![Alaska Airlines logo]()
$218
This Delta deal was found by Cheapflights users on 4/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/276:00 am
OAK
- YYZ
1 stop7h 35m
Delta
Deal found 4/6![Delta logo]()
$219
This Delta deal was found by Cheapflights users on 4/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/36:00 am
OAK
- YYZ
2 stops13h 59m
Delta
Deal found 4/7![Delta logo]()
$230
This Delta deal was found by Cheapflights users on 4/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/286:00 am
OAK
- YYZ
2 stops14h 58m
Delta
Deal found 4/9![Delta logo]()
$235
This Kiwi.com deal was found by Cheapflights users on 4/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/306:20 am
OAK
- YYZ
2 stops13h 25m
Multiple Airlines
Deal found 4/7![Multiple Airlines logo]()
$236
This Delta deal was found by Cheapflights users on 4/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/306:00 am
OAK
- YYZ
2 stops13h 59m
Delta
Deal found 4/9![Delta logo]()
$241
This CheapOair deal was found by Cheapflights users on 4/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/92:09 pm
OAK
- YYZ
1 stop22h 36m
Alaska Airlines
Deal found 4/10![Alaska Airlines logo]()
$250
This Delta deal was found by Cheapflights users on 4/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/46:00 am
OAK
- YUL
2 stops26h 57m
Delta
Deal found 4/7![Delta logo]()
$292
This Kiwi.com deal was found by Cheapflights users on 4/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/210:57 am
OAK
- YUL
2 stops33h 48m
Multiple Airlines
Deal found 4/8![Multiple Airlines logo]()
$293
This Delta deal was found by Cheapflights users on 4/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/246:00 am
OAK
- YUL
2 stops26h 30m
Delta
Deal found 4/9![Delta logo]()
$296
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 10, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $448 (Alaska Airlines) |
One-way from | $185 (Kiwi.com) |
Popular in | December |
Cheapest in | January |
Average price | $441 |
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 10, 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
Tue 5/5
9:33 am-3:45 pm
2 stops27h 12m
Toronto Pearson Intl
Tue 5/12
4:55 pm-10:32 pm
1 stop8h 37m
$452
Quickest round-trip
OaklandToronto
OAK - YYZ
OAKYYZ
Oakland
Tue 5/5
5:55 am-6:31 pm
2 stops9h 36m
Toronto Pearson Intl
Tue 5/12
2:20 pm-11:57 pm
2 stops12h 37m
$511
OaklandToronto
OAK - YYZ
OAKYYZ
Oakland
Wed 4/29
6:20 am-3:45 pm
1 stop30h 25m
Toronto Pearson Intl
Mon 5/4
4:55 pm-10:32 pm
1 stop8h 37m
$518
OaklandToronto
OAK - YYZ
OAKYYZ
Oakland
Sat 5/2
6:20 am-3:45 pm
1 stop30h 25m
Toronto Pearson Intl
Wed 5/6
4:55 pm-10:32 pm
1 stop8h 37m
$546
OaklandToronto
OAK - YYZ
OAKYYZ
Oakland
Tue 7/7
5:03 pm-8:55 am
2 stops12h 52m
Toronto Pearson Intl
Thu 7/9
12:09 pm-11:51 pm
2 stops14h 42m
$560
OaklandToronto
OAK - YYZ
OAKYYZ
Oakland
Thu 6/25
5:03 pm-11:19 am
2 stops15h 16m
Toronto Pearson Intl
Wed 7/1
5:45 pm-11:54 pm
1 stop9h 09m
$567
OaklandMontreal
OAK - YUL
OAKYUL
Oakland
Mon 6/1
12:28 pm-11:13 pm
2 stops31h 45m
Montreal Pierre Elliott Trudeau Intl
Wed 6/10
7:00 am-11:54 pm
2 stops19h 54m
$618
OaklandToronto
OAK - YYZ
OAKYYZ
Oakland
Sat 5/23
6:00 am-11:58 pm
2 stops14h 58m
Toronto Pearson Intl
Sat 5/30
5:45 pm-10:34 pm
1 stop7h 49m
$619
OaklandMontreal
OAK - YUL
OAKYUL
Oakland
Thu 5/7
12:28 pm-11:13 pm
2 stops31h 45m
Montreal Pierre Elliott Trudeau Intl
Wed 5/13
6:00 am-11:57 pm
2 stops20h 57m
$622
OaklandMontreal
OAK - YUL
OAKYUL
Oakland
Wed 5/6
12:34 pm-11:35 am
2 stops20h 01m
Montreal Pierre Elliott Trudeau Intl
Sat 5/16
7:00 am-10:34 pm
2 stops18h 34m
$622
Showing 1-10 of 60 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
OAK-YHM
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
What is the cheapest month to book a flight from Oakland, California to Region of Ontario?
Currently, February is the cheapest month in which you can book a flight from Oakland, California to Region of Ontario (average of $126). Flying from Oakland, California to Region of Ontario in January is currently the most expensive (average of $221). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
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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