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$175+ 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 1/14. Fares are subject to change and may not be available on all flights or dates of travel.
OAK — YYZ
Dec 17 — Dec 241
Wed 12/17
Wed 12/24
1 adult, Economy
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Cheap flight deals from Oakland to Ontario

Keep the following information in mind while searching for Oakland to Ontario flight deals. Data was last updated November 17, 2025.

Most accurate provider

Mytrip
3 stars

Most trusted provider

Mytrip
3 stars

Round-trip from

$373
(Alaska Airlines)

One-way from

$175
(Alaska Airlines)

Popular in

December

Cheapest in

February

Average price

$474
Provider with most accurate pricing for San Francisco-Toronto (YTO) flight deals.
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Provider most trusted by Cheapflights users for San Francisco-Toronto (YTO) flights.
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From Oakland to Ontario
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One-way flight from Oakland to Ontario
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Highest demand for flights based on searches. 12% potential increase in price ($60 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($16 potential savings vs. average RT price).
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Average for round-trip flights in November 2025
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Find 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 November 17, 2025.

This Alaska Airlines deal was found by Cheapflights users on 11/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/316:10 amOAK - YYZ
1 stop30h 25mAlaska Airlines
Thu 1/154:45 pmYYZ - OAK
1 stop26h 38mAlaska Airlines
Deal found 11/15$463
This Alaska Airlines deal was found by Cheapflights users on 11/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/316:10 amOAK - YYZ
1 stop30h 25mAlaska Airlines
Wed 1/74:45 pmYYZ - OAK
1 stop30h 55mAlaska Airlines
Deal found 11/16$488
This Alaska Airlines deal was found by Cheapflights users on 11/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/243:01 pmOAK - YYZ
1 stop21h 34mAlaska Airlines
Fri 1/94:45 pmYYZ - OAK
1 stop20h 43mAlaska Airlines
Deal found 11/15$492
This Alaska Airlines deal was found by Cheapflights users on 11/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/306:10 amOAK - YYZ
1 stop30h 25mAlaska Airlines
Wed 1/74:45 pmYYZ - OAK
1 stop30h 55mAlaska Airlines
Deal found 11/15$496
This Alaska Airlines deal was found by Cheapflights users on 11/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/246:10 amOAK - YYZ
1 stop30h 25mAlaska Airlines
Thu 1/84:45 pmYYZ - OAK
1 stop26h 38mAlaska Airlines
Deal found 11/15$503
This Delta deal was found by Cheapflights users on 11/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/185:55 amOAK - YYZ
2 stops14h 16mDelta
Fri 1/912:10 pmYYZ - OAK
2 stops13h 43mDelta
Deal found 11/15$526
This Alaska Airlines deal was found by Cheapflights users on 11/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/243:01 pmOAK - YYZ
1 stop21h 34mAlaska Airlines
Sat 1/104:45 pmYYZ - OAK
1 stop30h 55mAlaska Airlines
Deal found 11/15$528
This Alaska Airlines deal was found by Cheapflights users on 11/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/243:01 pmOAK - YYZ
1 stop21h 34mAlaska Airlines
Wed 1/74:45 pmYYZ - OAK
1 stop26h 38mAlaska Airlines
Deal found 11/15$546
This Mytrip deal was found by Cheapflights users on 11/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/319:17 pmOAK - YHM
2 stops24h 33mMultiple Airlines
Wed 1/76:10 pmYHM - OAK
2 stops28h 47mMultiple Airlines
Deal found 11/16$1,013
This Mytrip deal was found by Cheapflights users on 11/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/2011:30 pmOAK - YOW
3 stops22h 12mMultiple Airlines
Mon 11/247:15 pmYOW - OAK
3 stops29h 15mMultiple Airlines
Deal found 11/17$1,129
This Mytrip deal was found by Cheapflights users on 11/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/3111:17 pmOAK - YTZ
3 stops29h 53mMultiple Airlines
Wed 1/77:50 pmYTZ - OAK
3 stops28h 40mMultiple Airlines
Deal found 11/16$1,256
This Kiwi.com deal was found by Cheapflights users on 11/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/267:33 pmOAK - YUL
1 stop32h 27mMultiple Airlines
Sun 1/47:00 amYUL - OAK
2 stops53h 06mMultiple Airlines
Deal found 11/17$1,272

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 November 17, 2025.
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

Fri 2/13

6:15 am-3:35 pm

1 stop30h 20m

Toronto Pearson Intl

Wed 2/18

7:45 am-10:49 pm

2 stops18h 04m

$394

OaklandToronto

OAK - YYZ

OAKYYZ

Oakland

Fri 2/13

5:31 pm-3:35 pm

1 stop19h 04m

Toronto Pearson Intl

Thu 2/19

4:45 pm-10:49 pm

1 stop9h 04m

$413

OaklandToronto

OAK - YYZ

OAKYYZ

Oakland

Mon 3/16

6:15 am-3:35 pm

1 stop30h 20m

Toronto Pearson Intl

Wed 3/18

4:45 pm-11:38 pm

1 stop9h 53m

$423

OaklandToronto

OAK - YYZ

OAKYYZ

Oakland

Sun 3/15

6:15 am-3:35 pm

1 stop30h 20m

Toronto Pearson Intl

Wed 3/18

4:45 pm-11:38 pm

1 stop9h 53m

$423

OaklandToronto

OAK - YYZ

OAKYYZ

Oakland

Fri 1/16

8:10 am-3:35 pm

1 stop28h 25m

Toronto Pearson Intl

Sun 1/18

4:45 pm-9:46 am

2 stops20h 01m

$429

OaklandToronto

OAK - YYZ

OAKYYZ

Oakland

Tue 3/17

6:15 am-3:35 pm

1 stop30h 20m

Toronto Pearson Intl

Sun 3/22

4:45 pm-11:39 pm

1 stop9h 54m

$434

OaklandToronto

OAK - YYZ

OAKYYZ

Oakland

Sat 3/14

5:31 pm-3:35 pm

1 stop19h 04m

Toronto Pearson Intl

Tue 3/17

4:45 pm-5:43 pm

1 stop27h 58m

$455

OaklandToronto

OAK - YYZ

OAKYYZ

Oakland

Wed 12/31

6:10 am-3:35 pm

1 stop30h 25m

Toronto Pearson Intl

Thu 1/15

4:45 pm-4:23 pm

1 stop26h 38m

$463

OaklandToronto

OAK - YYZ

OAKYYZ

Oakland

Mon 3/16

5:31 pm-3:35 pm

1 stop19h 04m

Toronto Pearson Intl

Sat 3/21

4:45 pm-11:39 pm

1 stop9h 54m

$465

OaklandToronto

OAK - YYZ

OAKYYZ

Oakland

Mon 3/16

5:31 pm-3:35 pm

1 stop19h 04m

Toronto Pearson Intl

Fri 3/20

4:45 pm-11:39 pm

1 stop9h 54m

$465

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/16

Showing 1-10 of 55 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.

What is the cheapest time of day to fly from OAK to ON?

Find hourly flight availability from Oakland to Ontario. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated November 17, 2025.

It’s optimal to fly from Oakland, California to Region of Ontario at noon. By choosing this option you can save up to 23% on the cost of your flight, compared to a flight in the morning.

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 19h 04m. 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 - Toronto Island or Oakland - Montreal Pierre Elliott Trudeau Intl.

  • 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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