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$151+ 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 3/10. Fares are subject to change and may not be available on all flights or dates of travel.
OAK — YYZ
Jan 7 — Jan 141
Wed 1/7
Wed 1/14
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 December 8, 2025.

This Alaska Airlines deal was found by Cheapflights users on 12/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/256:10 amOAK - YYZ
1 stop30h 25mAlaska Airlines
Mon 1/124:45 pmYYZ - OAK
1 stop26h 38mAlaska Airlines
Deal found 12/5$568
This Alaska Airlines deal was found by Cheapflights users on 12/6. 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.
Thu 12/256:10 amOAK - YYZ
1 stop30h 25mAlaska Airlines
Wed 1/74:45 pmYYZ - OAK
1 stop30h 55mAlaska Airlines
Deal found 12/6$614
This Alaska Airlines deal was found by Cheapflights users on 12/6. 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.
Thu 12/256:10 amOAK - YYZ
1 stop30h 25mAlaska Airlines
Thu 1/84:45 pmYYZ - OAK
1 stop26h 38mAlaska Airlines
Deal found 12/6$620
This Delta deal was found by Cheapflights users on 12/5. 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.
Thu 12/255:53 amOAK - YYZ
2 stops14h 27mDelta
Tue 1/136:10 amYYZ - OAK
2 stops13h 04mDelta
Deal found 12/5$635
This Alaska Airlines deal was found by Cheapflights users on 12/6. 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.
Thu 12/258:32 pmOAK - YYZ
2 stops16h 03mAlaska Airlines
Fri 1/94:45 pmYYZ - OAK
1 stop26h 43mAlaska Airlines
Deal found 12/6$644
This Alaska Airlines deal was found by Cheapflights users on 12/6. 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.
Thu 12/259:49 amOAK - YYZ
1 stop26h 46mAlaska Airlines
Sun 1/114:45 pmYYZ - OAK
1 stop26h 38mAlaska Airlines
Deal found 12/6$663
This Delta deal was found by Cheapflights users on 12/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/255:53 amOAK - YYZ
2 stops14h 27mDelta
Tue 1/66:13 pmYYZ - OAK
2 stops20h 44mDelta
Deal found 12/6$665
This Delta deal was found by Cheapflights users on 12/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/255:53 amOAK - YYZ
2 stops14h 27mDelta
Sat 1/106:10 amYYZ - OAK
2 stops18h 28mDelta
Deal found 12/6$671
This Alaska Airlines deal was found by Cheapflights users on 12/6. 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.
Thu 12/259:49 amOAK - YYZ
1 stop26h 46mAlaska Airlines
Sat 1/104:45 pmYYZ - OAK
1 stop20h 43mAlaska Airlines
Deal found 12/6$678
This Delta deal was found by Cheapflights users on 12/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/3112:34 pmOAK - YUL
2 stops20h 24mDelta
Thu 1/87:00 amYUL - OAK
2 stops31h 57mDelta
Deal found 12/7$772
This Delta deal was found by Cheapflights users on 12/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/3012:34 pmOAK - YUL
2 stops32h 25mDelta
Fri 1/97:00 amYUL - OAK
2 stops18h 53mDelta
Deal found 12/7$784
This Delta deal was found by Cheapflights users on 12/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/3112:34 pmOAK - YUL
2 stops20h 24mDelta
Fri 1/97:00 amYUL - OAK
2 stops18h 53mDelta
Deal found 12/7$807

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 December 8, 2025.

Most accurate provider

Mytrip
3 stars

Most trusted provider

Mytrip
3 stars

Round-trip from

$347
(Alaska Airlines)

One-way from

$151
(Alaska Airlines)

Popular in

December

Cheapest in

February

Average price

$644
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. 13% potential increase in price ($67 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($19 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
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 December 8, 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

Mon 2/23

6:15 am-3:35 pm

1 stop30h 20m

Toronto Pearson Intl

Sat 3/7

4:45 pm-11:54 pm

1 stop10h 09m

$347

OaklandToronto

OAK - YYZ

OAKYYZ

Oakland

Tue 2/24

6:15 am-3:35 pm

1 stop30h 20m

Toronto Pearson Intl

Tue 3/3

4:45 pm-10:49 pm

1 stop9h 04m

$347

OaklandToronto

OAK - YYZ

OAKYYZ

Oakland

Mon 2/23

6:15 am-3:35 pm

1 stop30h 20m

Toronto Pearson Intl

Wed 3/4

4:45 pm-10:49 pm

1 stop9h 04m

$347

OaklandToronto

OAK - YYZ

OAKYYZ

Oakland

Fri 1/23

8:10 am-3:35 pm

1 stop28h 25m

Toronto Pearson Intl

Mon 2/2

4:45 pm-11:03 am

1 stop21h 18m

$356

OaklandToronto

OAK - YYZ

OAKYYZ

Oakland

Sun 1/18

8:10 am-3:35 pm

1 stop28h 25m

Toronto Pearson Intl

Wed 1/21

4:45 pm-8:40 pm

1 stop30h 55m

$356

OaklandToronto

OAK - YYZ

OAKYYZ

Oakland

Tue 2/24

6:15 am-3:35 pm

1 stop30h 20m

Toronto Pearson Intl

Fri 3/6

4:45 pm-4:37 pm

1 stop26h 52m

$356

OaklandToronto

OAK - YYZ

OAKYYZ

Oakland

Sat 2/28

5:31 pm-3:35 pm

1 stop19h 04m

Toronto Pearson Intl

Tue 3/3

4:45 pm-10:49 pm

1 stop9h 04m

$356

OaklandToronto

OAK - YYZ

OAKYYZ

Oakland

Wed 2/25

9:54 am-3:35 pm

1 stop26h 41m

Toronto Pearson Intl

Wed 3/4

4:45 pm-10:49 pm

1 stop9h 04m

$356

OaklandToronto

OAK - YYZ

OAKYYZ

Oakland

Wed 2/25

5:31 pm-3:35 pm

1 stop19h 04m

Toronto Pearson Intl

Tue 3/3

4:45 pm-9:14 am

1 stop19h 29m

$356

OaklandToronto

OAK - YYZ

OAKYYZ

Oakland

Thu 2/26

6:15 am-3:35 pm

1 stop30h 20m

Toronto Pearson Intl

Sat 3/7

4:45 pm-11:54 pm

1 stop10h 09m

$356

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/7

Showing 1-10 of 54 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 $202). 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 December 8, 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 and Delta fly from Oakland, California to Region of Ontario in about 27h 29m. The time it takes to get you to your destination can typically vary by up to 2h 51m. The distance from Oakland, California to Region of Ontario is about 2520 mi. This flight may include one or multiple stops.

  • 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 $202). 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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