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$170+ 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 2/16. Fares are subject to change and may not be available on all flights or dates of travel.
OAK — YYZ
Feb 20 — Feb 271
Fri 2/20
Fri 2/27
1 adult, Economy
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Cheap flight deals from Oakland to Ontario

Cheapest flights from Oakland to Ontario
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 21, 2026.

This Alaska Airlines deal was found by Cheapflights users on 1/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/247:00 am
OAK
-
YYZ
1 stop29h 45m
Alaska Airlines
Sat 5/94:55 pm
YYZ
-
OAK
1 stop8h 37m
Alaska Airlines
Deal found 1/20$364
This CheapOair deal was found by Cheapflights users on 1/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair 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
Mon 3/234:45 pm
YYZ
-
OAK
1 stop33h 58m
Alaska Airlines
Deal found 1/21$379
This Alaska Airlines deal was found by Cheapflights users on 1/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/236:15 am
OAK
-
YYZ
1 stop30h 20m
Alaska Airlines
Mon 3/24:45 pm
YYZ
-
OAK
1 stop26h 52m
Alaska Airlines
Deal found 1/21$386
This CheapOair deal was found by Cheapflights users on 1/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/246:15 am
OAK
-
YYZ
1 stop30h 20m
Alaska Airlines
Sun 3/14:45 pm
YYZ
-
OAK
1 stop33h 04m
Alaska Airlines
Deal found 1/21$390
This Alaska Airlines deal was found by Cheapflights users on 1/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/247:00 am
OAK
-
YYZ
1 stop29h 45m
Alaska Airlines
Mon 5/114:55 pm
YYZ
-
OAK
1 stop19h 18m
Alaska Airlines
Deal found 1/20$407
This CheapOair deal was found by Cheapflights users on 1/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/247:00 am
OAK
-
YYZ
1 stop29h 45m
Alaska Airlines
Sat 5/304:55 pm
YYZ
-
OAK
1 stop9h 59m
Alaska Airlines
Deal found 1/21$416
This Alaska Airlines deal was found by Cheapflights users on 1/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/76:15 am
OAK
-
YYZ
1 stop29h 20m
Alaska Airlines
Sat 3/144:45 pm
YYZ
-
OAK
1 stop10h 13m
Alaska Airlines
Deal found 1/21$418
This CheapOair deal was found by Cheapflights users on 1/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair 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
Fri 2/274:45 pm
YYZ
-
OAK
1 stop26h 52m
Alaska Airlines
Deal found 1/21$422
This Alaska Airlines deal was found by Cheapflights users on 1/20. Clicking the “Pick Dates” 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 4/237:00 am
OAK
-
YYZ
1 stop29h 45m
Alaska Airlines
Tue 5/54:55 pm
YYZ
-
OAK
1 stop19h 18m
Alaska Airlines
Deal found 1/20$427
This Alaska Airlines deal was found by Cheapflights users on 1/20. Clicking the “Pick Dates” 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 2/186:15 am
OAK
-
YYZ
1 stop30h 20m
Alaska Airlines
Sun 2/224:45 pm
YYZ
-
OAK
1 stop33h 07m
Alaska Airlines
Deal found 1/20$449
This Kiwi.com deal was found by Cheapflights users on 1/19. Clicking the “Pick Dates” 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 2/59:17 pm
OAK
-
YYZ
2 stops18h 33m
Multiple Airlines
Tue 2/104:45 pm
YYZ
-
OAK
1 stop20h 43m
Multiple Airlines
Deal found 1/19$453
This Delta deal was found by Cheapflights users on 1/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/255:05 pm
OAK
-
YUL
2 stops27h 29m
Delta
Mon 9/147:00 am
YUL
-
OAK
2 stops36h 31m
Delta
Deal found 1/21$625

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 21, 2026.

Most accurate provider

Mytrip
3 stars

Most trusted provider

Mytrip
3 stars

Round-trip from

$375
(Alaska Airlines)

One-way from

$170
(Alaska Airlines)

Popular in

December

Cheapest in

February

Average price

$392
Provider with most accurate pricing for San Francisco-Toronto (YTO) flight deals.
Search Deals
Provider most trusted by Cheapflights users for San Francisco-Toronto (YTO) flights.
Search Deals
From Oakland to Ontario
Search Deals
One-way flight from Oakland to Ontario
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($60 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($18 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
Search Deals

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 21, 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 2/23

6:15 am-3:35 pm

1 stop30h 20m

Toronto Pearson Intl

Mon 3/2

4:45 pm-4:37 pm

1 stop26h 52m

$386

OaklandToronto

OAK - YYZ

OAKYYZ

Oakland

Sun 5/24

7:00 am-3:45 pm

1 stop29h 45m

Toronto Pearson Intl

Sat 5/30

4:55 pm-11:54 pm

1 stop9h 59m

$416

OaklandToronto

OAK - YYZ

OAKYYZ

Oakland

Sat 3/7

6:15 am-2:35 pm

1 stop29h 20m

Toronto Pearson Intl

Sat 3/14

4:45 pm-11:58 pm

1 stop10h 13m

$418

OaklandToronto

OAK - YYZ

OAKYYZ

Oakland

Thu 4/23

7:00 am-3:45 pm

1 stop29h 45m

Toronto Pearson Intl

Tue 5/5

4:55 pm-9:13 am

1 stop19h 18m

$427

OaklandToronto

OAK - YYZ

OAKYYZ

Oakland

Wed 2/18

6:15 am-3:35 pm

1 stop30h 20m

Toronto Pearson Intl

Sun 2/22

4:45 pm-10:52 pm

1 stop33h 07m

$449

OaklandToronto

OAK - YYZ

OAKYYZ

Oakland

Wed 2/11

8:10 am-3:35 pm

1 stop28h 25m

Toronto Pearson Intl

Sat 2/14

4:45 pm-10:49 pm

1 stop9h 04m

$454

OaklandToronto

OAK - YYZ

OAKYYZ

Oakland

Thu 4/16

7:00 am-3:45 pm

1 stop29h 45m

Toronto Pearson Intl

Mon 4/20

4:55 pm-10:33 am

1 stop20h 38m

$487

OaklandToronto

OAK - YYZ

OAKYYZ

Oakland

Wed 2/11

10:30 am-3:35 pm

2 stops26h 05m

Toronto Pearson Intl

Tue 2/17

4:45 pm-9:24 am

2 stops19h 39m

$491

OaklandToronto

OAK - YYZ

OAKYYZ

Oakland

Mon 6/8

7:59 pm-3:45 pm

1 stop16h 46m

Toronto Pearson Intl

Fri 6/12

4:55 pm-10:47 pm

1 stop8h 52m

$501

OaklandHamilton

OAK - YHM

OAKYHM

Oakland

Sun 2/8

11:17 pm-12:50 am

2 stops22h 33m

Hamilton

Fri 2/13

3:15 pm-11:45 am

3 stops23h 30m

$899

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/21

Showing 1-10 of 45 results
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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.
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

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.

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.

  • What airport do you fly from for flights from Oakland to Ontario?

    For a flight from Oakland to Ontario, you will be flying from Oakland. Oakland (OAK) is just 7.0 mi from the center of the city.

  • How long is the flight from Oakland, California to Region of Ontario?

    Airlines like Alaska Airlines fly from Oakland, California to Region of Ontario in about 30h 20m. The time it takes to get you to your destination can typically vary by up to . The distance from Oakland, California to Region of Ontario is about 2243 mi.

  • What are the most popular routes from Oakland, California to Region of Ontario?

    The most popular route from Oakland, California to Region of Ontario is Oakland - Toronto Pearson Intl. You may also consider Oakland - Montreal Pierre Elliott Trudeau Intl or Oakland - Hamilton.

  • Can I find deals for flights from Oakland to Ontario that include hotel bookings?

    Yes. In addition to deals on Oakland to Ontario flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Oakland to Ontario?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Oakland to Ontario.

  • Can I find deals for business class flights from Oakland to Ontario?

    Yes. Cheapflights offers flight deals from Oakland to Ontario by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • 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.

See more FAQs

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