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$153+ 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 11/18. Fares are subject to change and may not be available on all flights or dates of travel.
OAK — YYZ
Nov 29 — Dec 61
Sat 11/29
Sat 12/6
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 October 30, 2025.

Most accurate provider

Mytrip
3 stars

Most trusted provider

Mytrip
3 stars

Round-trip from

$359
(SmartFares)

One-way from

$153
(Alaska Airlines)

Popular in

December

Cheapest in

April

Average price

$421
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. 10% potential increase in price ($50 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 October 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 October 30, 2025.

This Alaska Airlines deal was found by Cheapflights users on 10/28. 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.
Tue 11/186:30 amOAK - YYZ
1 stop30h 05mAlaska Airlines
Sat 11/224:45 pmYYZ - OAK
1 stop10h 14mAlaska Airlines
Deal found 10/28$372
This Alaska Airlines deal was found by Cheapflights users on 10/28. 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.
Fri 12/52:31 pmOAK - YYZ
1 stop22h 04mAlaska Airlines
Wed 12/104:45 pmYYZ - OAK
1 stop10h 14mAlaska Airlines
Deal found 10/28$382
This Alaska Airlines deal was found by Cheapflights users on 10/28. 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.
Wed 11/196:30 amOAK - YYZ
1 stop30h 05mAlaska Airlines
Sat 11/224:45 pmYYZ - OAK
1 stop10h 14mAlaska Airlines
Deal found 10/28$383
This Alaska Airlines deal was found by Cheapflights users on 10/28. 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.
Tue 11/188:03 pmOAK - YYZ
1 stop16h 32mAlaska Airlines
Sun 11/234:45 pmYYZ - OAK
1 stop10h 14mAlaska Airlines
Deal found 10/28$393
This Alaska Airlines deal was found by Cheapflights users on 10/28. 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 12/42:31 pmOAK - YYZ
1 stop22h 04mAlaska Airlines
Sun 12/74:45 pmYYZ - OAK
1 stop23h 47mAlaska Airlines
Deal found 10/28$394
This Alaska Airlines deal was found by Cheapflights users on 10/28. 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.
Wed 11/196:30 amOAK - YYZ
1 stop30h 05mAlaska Airlines
Sun 11/234:45 pmYYZ - OAK
1 stop10h 14mAlaska Airlines
Deal found 10/28$404
This Alaska Airlines deal was found by Cheapflights users on 10/28. 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 12/116:40 amOAK - YYZ
1 stop29h 55mAlaska Airlines
Sun 12/144:45 pmYYZ - OAK
1 stop20h 56mAlaska Airlines
Deal found 10/28$405
This Alaska Airlines deal was found by Cheapflights users on 10/28. 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.
Tue 11/188:03 pmOAK - YYZ
1 stop16h 32mAlaska Airlines
Mon 11/244:45 pmYYZ - OAK
1 stop10h 14mAlaska Airlines
Deal found 10/28$413
This Delta deal was found by Cheapflights users on 10/29. 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.
Sat 12/65:55 amOAK - YUL
2 stops15h 04mDelta
Mon 12/157:00 amYUL - OAK
2 stops12h 04mDelta
Deal found 10/29$663
This Delta deal was found by Cheapflights users on 10/28. 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 12/165:55 amOAK - YUL
2 stops14h 37mDelta
Tue 12/302:40 pmYUL - OAK
2 stops12h 18mDelta
Deal found 10/28$777
This Mytrip deal was found by Cheapflights users on 10/30. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/147:33 pmOAK - YUL
2 stops19h 12mMultiple Airlines
Sun 12/212:30 pmYUL - OAK
3 stops30h 11mMultiple Airlines
Deal found 10/30$818
This Mytrip deal was found by Cheapflights users on 10/29. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/69:17 pmOAK - YUL
3 stops23h 58mMultiple Airlines
Mon 12/154:15 pmYUL - OAK
3 stops32h 15mMultiple Airlines
Deal found 10/29$826

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 October 30, 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

Tue 11/18

9:48 am-3:35 pm

2 stops26h 47m

Toronto Pearson Intl

Sat 11/22

4:45 pm-11:59 pm

1 stop10h 14m

$392

OaklandToronto

OAK - YYZ

OAKYYZ

Oakland

Fri 12/5

9:26 am-3:35 pm

2 stops27h 09m

Toronto Pearson Intl

Wed 12/10

4:45 pm-11:59 pm

1 stop10h 14m

$392

OaklandToronto

OAK - YYZ

OAKYYZ

Oakland

Mon 1/5

3:01 pm-3:35 pm

1 stop21h 34m

Toronto Pearson Intl

Thu 1/8

4:45 pm-4:23 pm

1 stop26h 38m

$393

OaklandToronto

OAK - YYZ

OAKYYZ

Oakland

Thu 12/4

2:31 pm-3:35 pm

1 stop22h 04m

Toronto Pearson Intl

Sun 12/7

4:45 pm-1:32 pm

1 stop23h 47m

$394

OaklandToronto

OAK - YYZ

OAKYYZ

Oakland

Tue 11/18

9:48 am-3:35 pm

2 stops26h 47m

Toronto Pearson Intl

Sun 11/23

4:45 pm-11:59 pm

1 stop10h 14m

$412

OaklandToronto

OAK - YYZ

OAKYYZ

Oakland

Wed 11/19

9:48 am-3:35 pm

2 stops26h 47m

Toronto Pearson Intl

Fri 11/21

4:45 pm-11:59 pm

1 stop10h 14m

$423

OaklandToronto

OAK - YYZ

OAKYYZ

Oakland

Thu 11/27

12:20 pm-3:35 pm

1 stop24h 15m

Toronto Pearson Intl

Thu 12/4

4:45 pm-11:59 pm

1 stop10h 14m

$424

OaklandToronto

OAK - YYZ

OAKYYZ

Oakland

Thu 11/20

6:30 am-3:35 pm

1 stop30h 05m

Toronto Pearson Intl

Sat 11/22

4:45 pm-11:59 pm

1 stop10h 14m

$437

OaklandToronto

OAK - YYZ

OAKYYZ

Oakland

Thu 11/27

12:20 pm-3:35 pm

1 stop24h 15m

Toronto Pearson Intl

Thu 12/4

8:45 pm-11:59 pm

2 stops30h 14m

$443

OaklandToronto

OAK - YYZ

OAKYYZ

Oakland

Wed 11/19

9:48 am-3:35 pm

2 stops26h 47m

Toronto Pearson Intl

Mon 11/24

4:45 pm-11:59 pm

1 stop10h 14m

$443

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/28

Showing 1-10 of 31 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 October 30, 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 15h 04m. The time it takes to get you to your destination can typically vary by up to 11h 43m. 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 - Toronto Island.

  • 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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