$251+ 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 6/23. Fares are subject to change and may not be available on all flights or dates of travel.
OAK — YYZ
Jun 6 — Jun 131
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 May 7, 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 May 7, 2026.
This Delta deal was found by Cheapflights users on 5/6. 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.
Sun 6/286:00 am
OAK
- YYZ
1 stop7h 35m
Delta
Fri 7/105:45 pm
YYZ
- OAK
1 stop9h 05m
Delta
Deal found 5/6![Delta logo]()
$562
This Delta deal was found by Cheapflights users on 5/3. Clicking the “Pick Dates” 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 8/174:57 pm
OAK
- YYZ
2 stops16h 26m
Delta
Thu 8/205:45 pm
YYZ
- OAK
1 stop9h 06m
Delta
Deal found 5/3![Delta logo]()
$571
This Delta deal was found by Cheapflights users on 5/6. 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.
Sun 6/286:00 am
OAK
- YYZ
1 stop7h 35m
Delta
Mon 7/137:45 am
YYZ
- OAK
2 stops19h 05m
Delta
Deal found 5/6![Delta logo]()
$572
This Delta deal was found by Cheapflights users on 5/6. 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 6/246:00 am
OAK
- YYZ
2 stops12h 59m
Delta
Tue 8/46:14 pm
YYZ
- OAK
2 stops8h 37m
Delta
Deal found 5/6![Delta logo]()
$577
This Delta deal was found by Cheapflights users on 5/2. Clicking the “Pick Dates” 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
- YYZ
2 stops14h 24m
Delta
Tue 6/166:03 am
YYZ
- OAK
2 stops20h 51m
Delta
Deal found 5/2![Delta logo]()
$587
This Orbitz deal was found by Cheapflights users on 5/5. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/1212:20 pm
OAK
- YYZ
1 stop24h 25m
Alaska Airlines
Wed 10/214:55 pm
YYZ
- OAK
1 stop9h 00m
Alaska Airlines
Deal found 5/5![Alaska Airlines logo]()
$590
This Delta deal was found by Cheapflights users on 5/5. 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 6/165:03 pm
OAK
- YYZ
2 stops27h 12m
Delta
Wed 7/85:45 pm
YYZ
- OAK
1 stop9h 05m
Delta
Deal found 5/5![Delta logo]()
$593
This Delta deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” 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 6/246:00 am
OAK
- YYZ
1 stop7h 35m
Delta
Sat 6/275:45 pm
YYZ
- OAK
1 stop6h 56m
Delta
Deal found 5/4![Delta logo]()
$594
This Delta deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” 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 8/46:00 am
OAK
- YYZ
2 stops14h 14m
Delta
Wed 8/195:45 pm
YYZ
- OAK
1 stop9h 06m
Delta
Deal found 5/4![Delta logo]()
$604
This Delta deal was found by Cheapflights users on 5/3. Clicking the “Pick Dates” 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 5/305:55 pm
OAK
- YUL
2 stops26h 18m
Delta
Thu 6/46:00 am
YUL
- OAK
2 stops20h 57m
Delta
Deal found 5/3![Delta logo]()
$660
This Delta deal was found by Cheapflights users on 5/5. 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.
Wed 8/124:57 pm
OAK
- YUL
2 stops28h 02m
Delta
Sat 8/296:00 am
YUL
- OAK
2 stops19h 04m
Delta
Deal found 5/5![Delta logo]()
$673
This Delta deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” 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 8/1112:33 pm
OAK
- YUL
2 stops32h 26m
Delta
Sat 8/297:00 am
YUL
- OAK
2 stops18h 04m
Delta
Deal found 5/4![Delta logo]()
$676
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 May 7, 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 May 7, 2026.
This Delta deal was found by Cheapflights users on 5/6. 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 6/26:00 am
OAK
- YYZ
1 stop7h 35m
Delta
Sat 6/205:45 pm
YYZ
- OAK
1 stop6h 56m
Delta
Deal found 5/6![Delta logo]()
$562
This Alaska Airlines deal was found by Cheapflights users on 5/3. Clicking the “Pick Dates” 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 9/267:49 pm
OAK
- YYZ
2 stops11h 56m
Alaska Airlines
Wed 9/304:55 pm
YYZ
- OAK
1 stop8h 59m
Alaska Airlines
Deal found 5/3![Alaska Airlines logo]()
$679
This Kiwi.com deal was found by Cheapflights users on 5/7. 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.
Sat 5/237:03 pm
OAK
- YUL
2 stops20h 12m
Multiple Airlines
Mon 6/111:01 am
YUL
- OAK
1 stop13h 43m
Multiple Airlines
Deal found 5/7![Multiple Airlines logo]()
$860
This Delta deal was found by Cheapflights users on 5/2. Clicking the “Pick Dates” 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
- YYZ
2 stops12h 00m
Delta
Tue 6/165:45 pm
YYZ
- OAK
1 stop9h 09m
Delta
Deal found 5/2![Delta logo]()
$571
This Delta deal was found by Cheapflights users on 5/5. 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.
Sat 5/2312:28 pm
OAK
- YYZ
2 stops19h 47m
Delta
Sat 6/62:20 pm
YYZ
- OAK
2 stops11h 14m
Delta
Deal found 5/5![Delta logo]()
$612
This Alaska Airlines deal was found by Cheapflights users on 5/6. 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 6/29:35 am
OAK
- YYZ
2 stops27h 10m
Alaska Airlines
Wed 6/174:55 pm
YYZ
- OAK
1 stop19h 31m
Alaska Airlines
Deal found 5/6![Alaska Airlines logo]()
$729
This Delta deal was found by Cheapflights users on 5/5. 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.
Sat 6/136:00 am
OAK
- YYZ
2 stops14h 14m
Delta
Fri 7/36:05 am
YYZ
- OAK
2 stops13h 18m
Delta
Deal found 5/5![Delta logo]()
$641
This Delta deal was found by Cheapflights users on 5/3. Clicking the “Pick Dates” 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 6/136:00 am
OAK
- YYZ
2 stops14h 14m
Delta
Thu 7/26:30 am
YYZ
- OAK
2 stops12h 53m
Delta
Deal found 5/3![Delta logo]()
$641
This Mytrip deal was found by Cheapflights users on 5/5. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/811:15 pm
OAK
- YTZ
3 stops20h 05m
Multiple Airlines
Tue 6/166:55 pm
YTZ
- OAK
3 stops29h 49m
Multiple Airlines
Deal found 5/5![Multiple Airlines logo]()
$907
This Delta deal was found by Cheapflights users on 5/3. Clicking the “Pick Dates” 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 6/165:03 pm
OAK
- YYZ
2 stops27h 12m
Delta
Sat 7/412:25 pm
YYZ
- OAK
2 stops12h 16m
Delta
Deal found 5/3![Delta logo]()
$651
This Delta deal was found by Cheapflights users on 5/3. Clicking the “Pick Dates” 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 5/305:55 pm
OAK
- YUL
2 stops26h 18m
Delta
Thu 6/46:00 am
YUL
- OAK
2 stops20h 57m
Delta
Deal found 5/3![Delta logo]()
$660
This Mytrip deal was found by Cheapflights users on 5/3. Clicking the “Pick Dates” 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 6/811:30 pm
OAK
- YTZ
3 stops17h 45m
Multiple Airlines
Wed 7/88:55 pm
YTZ
- OAK
3 stops24h 39m
Multiple Airlines
Deal found 5/3![Multiple Airlines logo]()
$991
This Delta deal was found by Cheapflights users on 5/2. Clicking the “Pick Dates” 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 6/76:00 am
OAK
- YYZ
1 stop7h 35m
Delta
Tue 6/165:45 pm
YYZ
- OAK
1 stop9h 09m
Delta
Deal found 5/2![Delta logo]()
$680
This Mytrip deal was found by Cheapflights users on 5/6. 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.
Thu 7/911:30 pm
OAK
- YTZ
3 stops17h 45m
Multiple Airlines
Mon 7/134:55 pm
YTZ
- OAK
3 stops31h 49m
Multiple Airlines
Deal found 5/6![Multiple Airlines logo]()
$1,021
This Delta deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” 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 7/176:00 am
OAK
- YUL
2 stops31h 20m
Delta
Thu 7/237:00 am
YUL
- OAK
2 stops19h 50m
Delta
Deal found 5/4![Delta logo]()
$696
This Mytrip deal was found by Cheapflights users on 5/6. 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 6/298:22 pm
OAK
- YOW
3 stops24h 58m
Multiple Airlines
Thu 7/96:55 am
YOW
- OAK
2 stops14h 39m
Multiple Airlines
Deal found 5/6![Multiple Airlines logo]()
$1,029
This Delta deal was found by Cheapflights users on 5/3. Clicking the “Pick Dates” 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 6/165:03 pm
OAK
- YYZ
2 stops27h 12m
Delta
Fri 7/35:45 pm
YYZ
- OAK
1 stop9h 09m
Delta
Deal found 5/3![Delta logo]()
$700
This Mytrip deal was found by Cheapflights users on 5/5. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/311:30 pm
OAK
- YTZ
3 stops19h 50m
Multiple Airlines
Mon 6/85:00 pm
YTZ
- OAK
3 stops31h 44m
Multiple Airlines
Deal found 5/5![Multiple Airlines logo]()
$1,126
This Delta deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” 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 7/85:05 pm
OAK
- YUL
2 stops20h 15m
Delta
Wed 7/157:00 am
YUL
- OAK
2 stops19h 50m
Delta
Deal found 5/4![Delta logo]()
$715
This Mytrip deal was found by Cheapflights users on 5/5. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/911:15 pm
OAK
- YTZ
3 stops18h 00m
Multiple Airlines
Wed 7/84:55 pm
YTZ
- OAK
3 stops28h 39m
Multiple Airlines
Deal found 5/5![Multiple Airlines logo]()
$1,148
This Delta deal was found by Cheapflights users on 5/6. 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 6/105:03 pm
OAK
- YUL
2 stops27h 52m
Delta
Tue 6/237:00 am
YUL
- OAK
2 stops19h 54m
Delta
Deal found 5/6![Delta logo]()
$720
This Delta deal was found by Cheapflights users on 5/2. Clicking the “Pick Dates” 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 7/15:03 pm
OAK
- YUL
2 stops27h 39m
Delta
Sun 7/57:00 am
YUL
- OAK
2 stops19h 54m
Delta
Deal found 5/2![Delta logo]()
$741
This Mytrip deal was found by Cheapflights users on 5/6. 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.
Tue 7/2811:15 pm
OAK
- YTZ
3 stops18h 00m
Multiple Airlines
Tue 8/44:55 pm
YTZ
- OAK
3 stops31h 49m
Multiple Airlines
Deal found 5/6![Multiple Airlines logo]()
$1,212
This Delta deal was found by Cheapflights users on 5/3. Clicking the “Pick Dates” 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 7/76:00 am
OAK
- YYZ
1 stop7h 35m
Delta
Thu 7/235:45 pm
YYZ
- OAK
1 stop9h 05m
Delta
Deal found 5/3![Delta logo]()
$751
This Mytrip deal was found by Cheapflights users on 5/5. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/2411:15 pm
OAK
- YTZ
3 stops18h 00m
Multiple Airlines
Mon 6/296:55 pm
YTZ
- OAK
3 stops26h 39m
Multiple Airlines
Deal found 5/5![Multiple Airlines logo]()
$1,215
This Delta deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” 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 7/235:05 pm
OAK
- YUL
2 stops27h 35m
Delta
Wed 7/296:00 am
YUL
- OAK
2 stops20h 50m
Delta
Deal found 5/4![Delta logo]()
$754
This Travelocity deal was found by Cheapflights users on 5/3. Clicking the “Pick Dates” 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 7/302:55 pm
OAK
- YHM
2 stops13h 15m
Multiple Airlines
Tue 8/47:25 am
YHM
- OAK
2 stops14h 58m
Multiple Airlines
Deal found 5/3![Multiple Airlines logo]()
$1,219
This Mytrip deal was found by Cheapflights users on 5/5. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/911:15 pm
OAK
- YTZ
3 stops18h 00m
Multiple Airlines
Tue 7/76:55 pm
YTZ
- OAK
3 stops26h 39m
Multiple Airlines
Deal found 5/5![Multiple Airlines logo]()
$1,232
This Delta deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” 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 7/85:05 pm
OAK
- YUL
2 stops20h 15m
Delta
Sat 7/182:51 pm
YUL
- OAK
2 stops35h 59m
Delta
Deal found 5/4![Delta logo]()
$779
This Delta deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” 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 7/205:05 pm
OAK
- YUL
2 stops27h 35m
Delta
Sun 7/267:00 am
YUL
- OAK
2 stops19h 50m
Delta
Deal found 5/4![Delta logo]()
$786
Last-minute flights from Oakland to OntarioDiscover last-minute flight deals from Oakland to Ontario. Data last updated May 7, 2026 and is based on user searches.
Discover last-minute flight deals from Oakland to Ontario. Data last updated May 7, 2026 and is based on user searches.
This Delta deal was found by Cheapflights users on 5/5. 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.
Sat 5/2312:28 pm
OAK
- YYZ
2 stops19h 47m
Delta
Wed 6/35:45 pm
YYZ
- OAK
1 stop9h 12m
Delta
Deal found 5/5![Delta logo]()
$607
This Delta deal was found by Cheapflights users on 5/5. 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.
Sat 5/2312:28 pm
OAK
- YYZ
2 stops19h 47m
Delta
Sat 6/62:20 pm
YYZ
- OAK
2 stops11h 14m
Delta
Deal found 5/5![Delta logo]()
$612
This CheapOair deal was found by Cheapflights users on 5/6. 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.
Thu 6/47:00 am
OAK
- YYZ
1 stop29h 45m
Alaska Airlines
Sat 6/64:55 pm
YYZ
- OAK
1 stop10h 04m
Alaska Airlines
Deal found 5/6![Alaska Airlines logo]()
$605
This Delta deal was found by Cheapflights users on 5/2. Clicking the “Pick Dates” 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
- YYZ
2 stops12h 00m
Delta
Wed 6/105:45 pm
YYZ
- OAK
1 stop9h 09m
Delta
Deal found 5/2![Delta logo]()
$571
This Delta deal was found by Cheapflights users on 5/2. Clicking the “Pick Dates” 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
- YYZ
2 stops14h 24m
Delta
Tue 6/166:03 am
YYZ
- OAK
2 stops20h 51m
Delta
Deal found 5/2![Delta logo]()
$587
This Delta deal was found by Cheapflights users on 5/5. 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 6/165:03 pm
OAK
- YYZ
2 stops27h 12m
Delta
Wed 7/85:45 pm
YYZ
- OAK
1 stop9h 05m
Delta
Deal found 5/5![Delta logo]()
$593
This Delta deal was found by Cheapflights users on 5/5. 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 6/165:03 pm
OAK
- YYZ
2 stops27h 12m
Delta
Thu 7/911:40 am
YYZ
- OAK
2 stops15h 10m
Delta
Deal found 5/5![Delta logo]()
$599
This Delta deal was found by Cheapflights users on 5/6. 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 6/236:00 am
OAK
- YYZ
1 stop7h 35m
Delta
Sat 8/86:00 am
YYZ
- OAK
2 stops19h 04m
Delta
Deal found 5/6![Delta logo]()
$609
This Delta deal was found by Cheapflights users on 5/6. 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 6/246:00 am
OAK
- YYZ
2 stops12h 59m
Delta
Mon 8/107:45 am
YYZ
- OAK
2 stops19h 06m
Delta
Deal found 5/6![Delta logo]()
$577
This Delta deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” 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 6/246:00 am
OAK
- YYZ
1 stop7h 35m
Delta
Sat 6/275:45 pm
YYZ
- OAK
1 stop6h 56m
Delta
Deal found 5/4![Delta logo]()
$594
This Delta deal was found by Cheapflights users on 5/6. 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.
Sun 6/286:00 am
OAK
- YYZ
1 stop7h 35m
Delta
Fri 7/105:45 pm
YYZ
- OAK
1 stop9h 05m
Delta
Deal found 5/6![Delta logo]()
$562
This Delta deal was found by Cheapflights users on 5/6. 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.
Sun 6/286:00 am
OAK
- YYZ
1 stop7h 35m
Delta
Mon 7/137:45 am
YYZ
- OAK
2 stops19h 05m
Delta
Deal found 5/6![Delta logo]()
$572
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 May 7, 2026.
Search for one-way flight options from Oakland to Ontario. Find affordable one-way fares based on user searches. Data last updated May 7, 2026.
This Delta deal was found by Cheapflights users on 5/6. 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 6/236:00 am
OAK
- YYZ
1 stop7h 35m
Delta
Deal found 5/6![Delta logo]()
$251
This Delta deal was found by Cheapflights users on 5/3. Clicking the “Pick Dates” 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 6/195:03 pm
OAK
- YYZ
2 stops15h 16m
Delta
Deal found 5/3![Delta logo]()
$257
This Kiwi.com deal was found by Cheapflights users on 5/6. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/82:55 pm
OAK
- YYZ
3 stops30h 04m
Multiple Airlines
Deal found 5/6![Multiple Airlines logo]()
$258
This Delta deal was found by Cheapflights users on 5/5. 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.
Sat 6/206:00 am
OAK
- YYZ
2 stops14h 14m
Delta
Deal found 5/5![Delta logo]()
$262
This Kiwi.com deal was found by Cheapflights users on 5/5. 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.
Mon 7/206:22 am
OAK
- YYZ
3 stops14h 37m
Multiple Airlines
Deal found 5/5![Multiple Airlines logo]()
$263
This Delta deal was found by Cheapflights users on 5/2. Clicking the “Pick Dates” 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 10/275:55 am
OAK
- YYZ
1 stop7h 44m
Delta
Deal found 5/2![Delta logo]()
$265
This Delta deal was found by Cheapflights users on 5/3. Clicking the “Pick Dates” 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 6/165:03 pm
OAK
- YYZ
2 stops27h 12m
Delta
Deal found 5/3![Delta logo]()
$273
This Mytrip deal was found by Cheapflights users on 5/6. 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 6/228:22 pm
OAK
- YYZ
2 stops24h 53m
Multiple Airlines
Deal found 5/6![Multiple Airlines logo]()
$287
This Delta deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” 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 6/225:03 pm
OAK
- YYZ
2 stops12h 52m
Delta
Deal found 5/4![Delta logo]()
$289
This Mytrip deal was found by Cheapflights users on 5/6. 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.
Sun 6/2111:30 pm
OAK
- YYZ
2 stops16h 05m
Multiple Airlines
Deal found 5/6![Multiple Airlines logo]()
$292
This Delta deal was found by Cheapflights users on 5/3. Clicking the “Pick Dates” 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 7/76:00 am
OAK
- YUL
2 stops26h 56m
Delta
Deal found 5/3![Delta logo]()
$301
This Delta deal was found by Cheapflights users on 5/3. Clicking the “Pick Dates” 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 7/1112:30 pm
OAK
- YUL
2 stops32h 10m
Delta
Deal found 5/3![Delta logo]()
$308
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 May 7, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $562 (Delta) |
One-way from | $251 (Delta) |
Popular in | December |
Cheapest in | January |
Average price | $511 |
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 May 7, 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
Quickest round-trip
OaklandToronto
OAK - YYZ
OAKYYZ
Oakland
Tue 6/2
6:00 am-4:35 pm
1 stop7h 35m
Toronto Pearson Intl
Sat 6/20
5:45 pm-9:41 pm
1 stop6h 56m
$562
OaklandToronto
OAK - YYZ
OAKYYZ
Oakland
Sat 6/6
5:55 pm-8:55 am
2 stops12h 00m
Toronto Pearson Intl
Tue 6/16
5:45 pm-11:54 pm
1 stop9h 09m
$571
OaklandToronto
OAK - YYZ
OAKYYZ
Oakland
Sat 5/23
12:28 pm-11:15 am
2 stops19h 47m
Toronto Pearson Intl
Sat 6/6
2:20 pm-10:34 pm
2 stops11h 14m
$612
OaklandToronto
OAK - YYZ
OAKYYZ
Oakland
Sat 6/13
6:00 am-11:14 pm
2 stops14h 14m
Toronto Pearson Intl
Fri 7/3
6:05 am-4:23 pm
2 stops13h 18m
$641
OaklandToronto
OAK - YYZ
OAKYYZ
Oakland
Sat 6/13
6:00 am-11:14 pm
2 stops14h 14m
Toronto Pearson Intl
Thu 7/2
6:30 am-4:23 pm
2 stops12h 53m
$641
OaklandToronto
OAK - YYZ
OAKYYZ
Oakland
Tue 6/16
5:03 pm-11:15 pm
2 stops27h 12m
Toronto Pearson Intl
Sat 7/4
12:25 pm-9:41 pm
2 stops12h 16m
$651
OaklandMontreal
OAK - YUL
OAKYUL
Oakland
Sat 5/30
5:55 pm-11:13 pm
2 stops26h 18m
Montreal Pierre Elliott Trudeau Intl
Thu 6/4
6:00 am-11:57 pm
2 stops20h 57m
$660
OaklandToronto
OAK - YYZ
OAKYYZ
Oakland
Sat 9/26
7:49 pm-10:45 am
2 stops11h 56m
Toronto Pearson Intl
Wed 9/30
4:55 pm-10:54 pm
1 stop8h 59m
$679
OaklandToronto
OAK - YYZ
OAKYYZ
Oakland
Sun 6/7
6:00 am-4:35 pm
1 stop7h 35m
Toronto Pearson Intl
Tue 6/16
5:45 pm-11:54 pm
1 stop9h 09m
$680
OaklandMontreal
OAK - YUL
OAKYUL
Oakland
Fri 7/17
6:00 am-4:20 pm
2 stops31h 20m
Montreal Pierre Elliott Trudeau Intl
Thu 7/23
7:00 am-11:50 pm
2 stops19h 50m
$696
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-YOW
OAK-YTZ
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-YOW
OAK-YTZ
No data available for this route at this time. Please check back soon.
Related info for your journey
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