$169+ 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 3/12. Fares are subject to change and may not be available on all flights or dates of travel.
OAK — YYZ
Mar 1 — Mar 81
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
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
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 Oakland to Ontario
Cheapest
Best
Last-minute
One-way
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 January 30, 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 January 30, 2026.
This Alaska Airlines deal was found by Cheapflights users on 1/29. Clicking the “Pick Dates” 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 3/26:15 am
OAK
- YYZ
1 stop30h 20m
Alaska Airlines
Wed 3/44:45 pm
YYZ
- OAK
1 stop9h 04m
Alaska Airlines
Deal found 1/29![Alaska Airlines logo]()
$364
This CheapOair deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” 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 2/276:15 am
OAK
- YYZ
1 stop30h 20m
Alaska Airlines
Tue 3/34:45 pm
YYZ
- OAK
1 stop9h 04m
Alaska Airlines
Deal found 1/28![Alaska Airlines logo]()
$384
This CheapOair deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” 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 2/186:15 am
OAK
- YYZ
1 stop30h 20m
Alaska Airlines
Fri 2/204:45 pm
YYZ
- OAK
1 stop9h 04m
Alaska Airlines
Deal found 1/28![Alaska Airlines logo]()
$385
This CheapOair deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” 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 2/276:15 am
OAK
- YYZ
1 stop30h 20m
Alaska Airlines
Sun 3/14:45 pm
YYZ
- OAK
1 stop33h 04m
Alaska Airlines
Deal found 1/28![Alaska Airlines logo]()
$394
This CheapOair deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” 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 2/266:15 am
OAK
- YYZ
1 stop30h 20m
Alaska Airlines
Sun 3/14:45 pm
YYZ
- OAK
1 stop33h 04m
Alaska Airlines
Deal found 1/28![Alaska Airlines logo]()
$396
This CheapOair deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” 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 2/286:15 am
OAK
- YYZ
1 stop30h 20m
Alaska Airlines
Tue 3/34:45 pm
YYZ
- OAK
2 stops19h 39m
Alaska Airlines
Deal found 1/28![Alaska Airlines logo]()
$401
This Kiwi.com deal was found by Cheapflights users on 1/29. Clicking the “Pick Dates” 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 3/26:15 am
OAK
- YYZ
2 stops15h 14m
Multiple Airlines
Wed 3/44:45 pm
YYZ
- OAK
1 stop9h 04m
Multiple Airlines
Deal found 1/29![Multiple Airlines logo]()
$407
This CheapOair deal was found by Cheapflights users on 1/30. Clicking the “Pick Dates” 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 2/276:15 am
OAK
- YYZ
1 stop30h 20m
Alaska Airlines
Mon 3/24:45 pm
YYZ
- OAK
1 stop26h 52m
Alaska Airlines
Deal found 1/30![Alaska Airlines logo]()
$410
This CheapOair deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” 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 5/59:33 am
OAK
- YYZ
2 stops27h 12m
Alaska Airlines
Tue 5/124:55 pm
YYZ
- OAK
1 stop22h 11m
Alaska Airlines
Deal found 1/28![Alaska Airlines logo]()
$412
This Delta deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” 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 5/235:05 pm
OAK
- YUL
2 stops27h 29m
Delta
Wed 5/276:00 am
YUL
- OAK
2 stops20h 49m
Delta
Deal found 1/28![Delta logo]()
$619
This Delta deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” 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 5/235:05 pm
OAK
- YUL
2 stops27h 29m
Delta
Sat 5/307:00 am
YUL
- OAK
2 stops17h 34m
Delta
Deal found 1/28![Delta logo]()
$645
This Delta deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” 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 5/235:05 pm
OAK
- YUL
2 stops27h 29m
Delta
Sun 5/316:00 am
YUL
- OAK
2 stops20h 49m
Delta
Deal found 1/28![Delta logo]()
$655
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 January 30, 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 January 30, 2026.
This Alaska Airlines deal was found by Cheapflights users on 1/29. Clicking the “Pick Dates” 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 3/26:15 am
OAK
- YYZ
1 stop30h 20m
Alaska Airlines
Wed 3/44:45 pm
YYZ
- OAK
1 stop9h 04m
Alaska Airlines
Deal found 1/29![Alaska Airlines logo]()
$364
This Delta deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” 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 5/235:05 pm
OAK
- YUL
2 stops27h 29m
Delta
Wed 5/276:00 am
YUL
- OAK
2 stops20h 49m
Delta
Deal found 1/28![Delta logo]()
$619
This KAYAK deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” 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.
Mon 4/207:00 am
OAK
- YUL
2 stops29h 13m
Multiple Airlines
Mon 4/275:30 pm
YUL
- OAK
2 stops32h 02m
Multiple Airlines
Deal found 1/28![Multiple Airlines logo]()
$735
This Alaska Airlines deal was found by Cheapflights users on 1/27. Clicking the “Pick Dates” 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 3/166:15 am
OAK
- YYZ
1 stop30h 20m
Alaska Airlines
Tue 3/314:55 pm
YYZ
- OAK
1 stop33h 48m
Alaska Airlines
Deal found 1/27![Alaska Airlines logo]()
$385
This CheapOair deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” 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 2/286:15 am
OAK
- YYZ
1 stop30h 20m
Alaska Airlines
Tue 3/34:45 pm
YYZ
- OAK
2 stops19h 39m
Alaska Airlines
Deal found 1/28![Alaska Airlines logo]()
$401
This CheapOair deal was found by Cheapflights users on 1/30. Clicking the “Pick Dates” 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 2/276:15 am
OAK
- YYZ
1 stop30h 20m
Alaska Airlines
Mon 3/24:45 pm
YYZ
- OAK
1 stop26h 52m
Alaska Airlines
Deal found 1/30![Alaska Airlines logo]()
$410
This CheapOair deal was found by Cheapflights users on 1/30. Clicking the “Pick Dates” 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 2/275:03 pm
OAK
- YYZ
2 stops19h 32m
Alaska Airlines
Tue 3/34:45 pm
YYZ
- OAK
2 stops19h 39m
Alaska Airlines
Deal found 1/30![Alaska Airlines logo]()
$435
This CheapOair deal was found by Cheapflights users on 1/30. Clicking the “Pick Dates” 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 2/266:15 am
OAK
- YYZ
1 stop30h 20m
Alaska Airlines
Sun 3/14:45 pm
YYZ
- OAK
1 stop33h 04m
Alaska Airlines
Deal found 1/30![Alaska Airlines logo]()
$436
This Delta deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” 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 5/235:05 pm
OAK
- YUL
2 stops27h 29m
Delta
Sun 5/316:00 am
YUL
- OAK
2 stops20h 49m
Delta
Deal found 1/28![Delta logo]()
$655
This Alaska Airlines deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” 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 3/126:15 am
OAK
- YYZ
1 stop30h 20m
Alaska Airlines
Thu 3/194:45 pm
YYZ
- OAK
1 stop33h 58m
Alaska Airlines
Deal found 1/28![Alaska Airlines logo]()
$441
This Delta deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” 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 5/265:05 pm
OAK
- YUL
2 stops27h 53m
Delta
Sat 5/307:00 am
YUL
- OAK
2 stops17h 34m
Delta
Deal found 1/28![Delta logo]()
$690
This Alaska Airlines deal was found by Cheapflights users on 1/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/16:15 am
OAK
- YYZ
1 stop30h 20m
Alaska Airlines
Wed 3/44:45 pm
YYZ
- OAK
1 stop9h 04m
Alaska Airlines
Deal found 1/29![Alaska Airlines logo]()
$445
This Mytrip deal was found by Cheapflights users on 1/27. Clicking the “Pick Dates” 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 6/1311:48 pm
OAK
- YOW
3 stops33h 42m
Multiple Airlines
Sat 6/206:25 pm
YOW
- OAK
3 stops30h 35m
Multiple Airlines
Deal found 1/27![Multiple Airlines logo]()
$799
This Delta deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” 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 6/155:55 am
OAK
- YUL
2 stops26h 49m
Delta
Fri 6/197:00 am
YUL
- OAK
2 stops36h 31m
Delta
Deal found 1/28![Delta logo]()
$708
This CheapOair deal was found by Cheapflights users on 1/30. Clicking the “Pick Dates” 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 3/1110:04 am
OAK
- YYZ
2 stops26h 31m
Alaska Airlines
Sun 3/154:45 pm
YYZ
- OAK
2 stops19h 39m
Alaska Airlines
Deal found 1/30![Alaska Airlines logo]()
$452
This Delta deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” 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 6/155:55 am
OAK
- YUL
2 stops26h 49m
Delta
Thu 6/186:00 am
YUL
- OAK
2 stops20h 49m
Delta
Deal found 1/28![Delta logo]()
$708
This Mytrip deal was found by Cheapflights users on 1/27. Clicking the “Pick Dates” 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 3/1611:07 pm
OAK
- YHM
2 stops22h 15m
Multiple Airlines
Tue 3/315:50 am
YHM
- OAK
2 stops17h 07m
Multiple Airlines
Deal found 1/27![Multiple Airlines logo]()
$887
This Delta deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” 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 6/155:55 am
OAK
- YUL
2 stops26h 49m
Delta
Sat 6/207:00 am
YUL
- OAK
2 stops17h 34m
Delta
Deal found 1/28![Delta logo]()
$708
This Delta deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” 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 5/241:15 pm
OAK
- YUL
2 stops31h 19m
Delta
Fri 5/297:00 am
YUL
- OAK
2 stops36h 31m
Delta
Deal found 1/28![Delta logo]()
$709
This Expedia deal was found by Cheapflights users on 1/29. Clicking the “Pick Dates” 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.
Sun 3/155:31 pm
OAK
- YOW
2 stops18h 13m
Multiple Airlines
Wed 3/1810:00 am
YOW
- OAK
2 stops16h 43m
Multiple Airlines
Deal found 1/29![Multiple Airlines logo]()
$988
This Delta deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” 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.
Fri 5/225:05 pm
OAK
- YUL
2 stops27h 53m
Delta
Thu 5/286:15 pm
YUL
- OAK
2 stops32h 34m
Delta
Deal found 1/28![Delta logo]()
$730
This Travelocity deal was found by Cheapflights users on 1/29. Clicking the “Pick Dates” 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.
Thu 2/265:31 pm
OAK
- YOW
2 stops18h 14m
Multiple Airlines
Thu 3/58:50 am
YOW
- OAK
2 stops18h 04m
Multiple Airlines
Deal found 1/29![Multiple Airlines logo]()
$1,049
This Delta deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” 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.
Fri 5/221:15 pm
OAK
- YUL
2 stops31h 43m
Delta
Sat 5/307:00 am
YUL
- OAK
2 stops17h 34m
Delta
Deal found 1/28![Delta logo]()
$730
This Delta deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” 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 5/245:05 pm
OAK
- YUL
2 stops27h 29m
Delta
Sat 5/307:00 am
YUL
- OAK
2 stops17h 34m
Delta
Deal found 1/28![Delta logo]()
$735
This Expedia deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” 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 6/151:20 pm
OAK
- YOW
2 stops13h 43m
Multiple Airlines
Mon 6/222:00 pm
YOW
- OAK
2 stops11h 47m
Multiple Airlines
Deal found 1/28![Multiple Airlines logo]()
$1,102
This Delta deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” 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 5/211:15 pm
OAK
- YUL
2 stops31h 43m
Delta
Wed 5/276:00 am
YUL
- OAK
2 stops20h 49m
Delta
Deal found 1/28![Delta logo]()
$739
Last-minute flights from Oakland to OntarioDiscover last-minute flight deals from Oakland to Ontario. Data last updated January 30, 2026 and is based on user searches.
Discover last-minute flight deals from Oakland to Ontario. Data last updated January 30, 2026 and is based on user searches.
This Delta deal was found by Cheapflights users on 1/29. Clicking the “Pick Dates” 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 2/1212:40 pm
OAK
- YUL
2 stops32h 05m
Delta
Wed 2/187:00 am
YUL
- OAK
2 stops31h 55m
Delta
Deal found 1/29![Delta logo]()
$751
This Delta deal was found by Cheapflights users on 1/29. Clicking the “Pick Dates” 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 2/1212:40 pm
OAK
- YUL
2 stops32h 05m
Delta
Tue 2/1712:30 pm
YUL
- OAK
2 stops26h 25m
Delta
Deal found 1/29![Delta logo]()
$787
This Delta deal was found by Cheapflights users on 1/29. Clicking the “Pick Dates” 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 2/155:55 am
OAK
- YUL
2 stops26h 30m
Delta
Wed 2/187:00 am
YUL
- OAK
2 stops31h 55m
Delta
Deal found 1/29![Delta logo]()
$687
This Delta deal was found by Cheapflights users on 1/29. Clicking the “Pick Dates” 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 2/155:55 am
OAK
- YUL
2 stops26h 30m
Delta
Tue 2/1712:30 pm
YUL
- OAK
2 stops30h 42m
Delta
Deal found 1/29![Delta logo]()
$723
This Delta deal was found by Cheapflights users on 1/29. Clicking the “Pick Dates” 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 2/155:55 am
OAK
- YUL
2 stops26h 30m
Delta
Fri 2/207:00 am
YUL
- OAK
2 stops19h 51m
Delta
Deal found 1/29![Delta logo]()
$790
This Delta deal was found by Cheapflights users on 1/29. Clicking the “Pick Dates” 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 2/155:55 am
OAK
- YUL
2 stops26h 30m
Delta
Sun 2/227:00 am
YUL
- OAK
2 stops19h 51m
Delta
Deal found 1/29![Delta logo]()
$797
This CheapOair deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” 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 2/186:15 am
OAK
- YYZ
1 stop30h 20m
Alaska Airlines
Fri 2/204:45 pm
YYZ
- OAK
1 stop9h 04m
Alaska Airlines
Deal found 1/28![Alaska Airlines logo]()
$385
This CheapOair deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” 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 2/266:15 am
OAK
- YYZ
1 stop30h 20m
Alaska Airlines
Sun 3/14:45 pm
YYZ
- OAK
1 stop33h 04m
Alaska Airlines
Deal found 1/28![Alaska Airlines logo]()
$396
This CheapOair deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” 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 2/276:15 am
OAK
- YYZ
1 stop30h 20m
Alaska Airlines
Tue 3/34:45 pm
YYZ
- OAK
1 stop9h 04m
Alaska Airlines
Deal found 1/28![Alaska Airlines logo]()
$384
This CheapOair deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” 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 2/276:15 am
OAK
- YYZ
1 stop30h 20m
Alaska Airlines
Sun 3/14:45 pm
YYZ
- OAK
1 stop33h 04m
Alaska Airlines
Deal found 1/28![Alaska Airlines logo]()
$394
This CheapOair deal was found by Cheapflights users on 1/30. Clicking the “Pick Dates” 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 2/276:15 am
OAK
- YYZ
1 stop30h 20m
Alaska Airlines
Mon 3/24:45 pm
YYZ
- OAK
1 stop26h 52m
Alaska Airlines
Deal found 1/30![Alaska Airlines logo]()
$410
This CheapOair deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” 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 2/286:15 am
OAK
- YYZ
1 stop30h 20m
Alaska Airlines
Tue 3/34:45 pm
YYZ
- OAK
2 stops19h 39m
Alaska Airlines
Deal found 1/28![Alaska Airlines logo]()
$401
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 January 30, 2026.
Search for one-way flight options from Oakland to Ontario. Find affordable one-way fares based on user searches. Data last updated January 30, 2026.
This CheapOair deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” 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 3/46:15 am
OAK
- YYZ
1 stop30h 20m
Alaska Airlines
Deal found 1/28![Alaska Airlines logo]()
$169
This CheapOair deal was found by Cheapflights users on 1/29. Clicking the “Pick Dates” 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 2/196:15 am
OAK
- YYZ
1 stop30h 20m
Alaska Airlines
Deal found 1/29![Alaska Airlines logo]()
$189
This Alaska Airlines deal was found by Cheapflights users on 1/29. Clicking the “Pick Dates” 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 2/2510:04 am
OAK
- YYZ
2 stops26h 31m
Alaska Airlines
Deal found 1/29![Alaska Airlines logo]()
$192
This Alaska Airlines deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” 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 5/96:20 am
OAK
- YYZ
1 stop30h 25m
Alaska Airlines
Deal found 1/28![Alaska Airlines logo]()
$195
This Alaska Airlines deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/106:20 am
OAK
- YYZ
1 stop30h 25m
Alaska Airlines
Deal found 1/28![Alaska Airlines logo]()
$200
This Kiwi.com deal was found by Cheapflights users on 1/29. Clicking the “Pick Dates” 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 2/256:15 am
OAK
- YTZ
2 stops28h 32m
Multiple Airlines
Deal found 1/29![Multiple Airlines logo]()
$211
This Kiwi.com deal was found by Cheapflights users on 1/29. Clicking the “Pick Dates” 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 2/256:15 am
OAK
- YYZ
1 stop30h 20m
Multiple Airlines
Deal found 1/29![Multiple Airlines logo]()
$214
This CheapOair deal was found by Cheapflights users on 1/29. Clicking the “Pick Dates” 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 5/277:59 pm
OAK
- YYZ
1 stop16h 46m
Alaska Airlines
Deal found 1/29![Alaska Airlines logo]()
$219
This Kiwi.com deal was found by Cheapflights users on 1/29. Clicking the “Pick Dates” 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 3/156:15 am
OAK
- YUL
2 stops39h 23m
Multiple Airlines
Deal found 1/29![Multiple Airlines logo]()
$257
This Delta deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” 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 6/155:55 am
OAK
- YUL
2 stops26h 49m
Delta
Deal found 1/28![Delta logo]()
$328
This Delta deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” 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 6/135:55 am
OAK
- YUL
2 stops27h 21m
Delta
Deal found 1/28![Delta logo]()
$363
This Delta deal was found by Cheapflights users on 1/29. Clicking the “Pick Dates” 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.
Fri 6/125:05 pm
OAK
- YUL
2 stops27h 51m
Delta
Deal found 1/29![Delta logo]()
$368
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 January 30, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $364 (Alaska Airlines) |
One-way from | $158 (CheapOair) |
Popular in | December |
Cheapest in | February |
Average price | $392 |
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 January 30, 2026.
Use the filters below to find and compare flights from Oakland to Ontario that are best for you.
Fly from
Oakland
Fly to
Ontario
Route
Depart
Return
Price
OaklandToronto
OAK - YYZ
OAKYYZ
Oakland
Mon 3/2
6:15 am-3:35 pm
1 stop30h 20m
Toronto Pearson Intl
Wed 3/4
4:45 pm-10:49 pm
1 stop9h 04m
$364
OaklandToronto
OAK - YYZ
OAKYYZ
Oakland
Mon 3/16
6:15 am-3:35 pm
1 stop30h 20m
Toronto Pearson Intl
Tue 3/31
4:55 pm-11:43 pm
1 stop33h 48m
$385
OaklandToronto
OAK - YYZ
OAKYYZ
Oakland
Sat 2/28
6:15 am-3:35 pm
1 stop30h 20m
Toronto Pearson Intl
Tue 3/3
4:45 pm-9:24 am
2 stops19h 39m
$401
OaklandToronto
OAK - YYZ
OAKYYZ
Oakland
Fri 2/27
6:15 am-3:35 pm
1 stop30h 20m
Toronto Pearson Intl
Mon 3/2
4:45 pm-4:37 pm
1 stop26h 52m
$410
OaklandToronto
OAK - YYZ
OAKYYZ
Oakland
Fri 2/27
5:03 pm-3:35 pm
2 stops19h 32m
Toronto Pearson Intl
Tue 3/3
4:45 pm-9:24 am
2 stops19h 39m
$435
OaklandToronto
OAK - YYZ
OAKYYZ
Oakland
Thu 2/26
6:15 am-3:35 pm
1 stop30h 20m
Toronto Pearson Intl
Sun 3/1
4:45 pm-10:49 pm
1 stop33h 04m
$436
OaklandToronto
OAK - YYZ
OAKYYZ
Oakland
Thu 3/12
6:15 am-3:35 pm
1 stop30h 20m
Toronto Pearson Intl
Thu 3/19
4:45 pm-11:43 pm
1 stop33h 58m
$441
OaklandToronto
OAK - YYZ
OAKYYZ
Oakland
Sun 3/1
6:15 am-3:35 pm
1 stop30h 20m
Toronto Pearson Intl
Wed 3/4
4:45 pm-10:49 pm
1 stop9h 04m
$445
OaklandToronto
OAK - YYZ
OAKYYZ
Oakland
Wed 3/11
10:04 am-3:35 pm
2 stops26h 31m
Toronto Pearson Intl
Sun 3/15
4:45 pm-9:24 am
2 stops19h 39m
$452
OaklandMontreal
OAK - YUL
OAKYUL
Oakland
Sat 5/23
5:05 pm-11:34 pm
2 stops27h 29m
Montreal Pierre Elliott Trudeau Intl
Wed 5/27
6:00 am-11:49 pm
2 stops20h 49m
$619
Showing 1-10 of 50 results
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-YOW
OAK-YHM
OAK-YTZ
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-YOW
OAK-YHM
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 $127). Flying from Oakland, California to Region of Ontario in August is currently the most expensive (average of $203). 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.