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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 5/5. Fares are subject to change and may not be available on all flights or dates of travel.
OAK — YYZ
Apr 2 — Apr 91
Wed 4/2
Wed 4/9
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 March 28, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$233
(Kiwi.com)

One-way from

$153
(Mytrip)

Popular in

December

Cheapest in

February

Average price

$405
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. 6% potential increase in price ($30 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($13 potential savings vs. average RT price).
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Average for round-trip flights in March 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 March 28, 2025.

This Kiwi.com deal was found by Cheapflights users on 3/27. 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.
Tue 4/156:40 pmOAK - YYZ
1 stop9h 03mMultiple Airlines
Tue 4/225:50 pmYYZ - OAK
1 stop26h 44mMultiple Airlines
Deal found 3/27$233
This Kiwi.com deal was found by Cheapflights users on 3/26. 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.
Tue 4/226:40 pmOAK - YOW
1 stop19h 05mMultiple Airlines
Sun 4/276:10 pmYOW - OAK
1 stop15h 39mMultiple Airlines
Deal found 3/26$293
This Mytrip deal was found by Cheapflights users on 3/26. 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 5/105:30 amOAK - YUL
2 stops31h 57mMultiple Airlines
Sat 5/176:45 amYUL - OAK
3 stops18h 40mMultiple Airlines
Deal found 3/26$389
This Delta deal was found by Cheapflights users on 3/27. 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 4/176:00 amOAK - YYZ
1 stop7h 38mDelta
Mon 4/215:50 pmYYZ - OAK
1 stop8h 53mDelta
Deal found 3/27$447
This Mytrip deal was found by Cheapflights users on 3/26. 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.
Fri 5/235:30 amOAK - YTZ
3 stops33h 47mMultiple Airlines
Tue 5/273:35 pmYTZ - OAK
3 stops33h 50mMultiple Airlines
Deal found 3/26$478
This Alaska Airlines deal was found by Cheapflights users on 3/27. 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 5/67:00 amOAK - YYZ
1 stop29h 00mAlaska Airlines
Fri 5/94:45 pmYYZ - OAK
1 stop9h 59mAlaska Airlines
Deal found 3/27$495
This Delta deal was found by Cheapflights users on 3/26. 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 6/34:55 pmOAK - YUL
2 stops27h 24mDelta
Tue 6/106:45 pmYUL - OAK
2 stops24h 31mDelta
Deal found 3/26$509

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 March 28, 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 4/15

6:40 pm-6:43 am

1 stop9h 03m

Toronto Pearson Intl

Tue 4/22

5:50 pm-5:34 pm

1 stop26h 44m

$233

OaklandOttawa

OAK - YOW

OAKYOW

Oakland

Tue 4/22

6:40 pm-4:45 pm

1 stop19h 05m

Ottawa

Sun 4/27

6:10 pm-6:49 am

1 stop15h 39m

$293

OaklandMontreal

OAK - YUL

OAKYUL

Oakland

Sat 5/10

5:30 am-4:27 pm

2 stops31h 57m

Montreal Pierre Elliott Trudeau Intl

Sat 5/17

6:45 am-10:25 pm

3 stops18h 40m

$389

OaklandToronto

OAK - YYZ

OAKYYZ

Oakland

Thu 4/17

6:00 am-4:38 pm

1 stop7h 38m

Toronto Pearson Intl

Mon 4/21

5:50 pm-11:43 pm

1 stop8h 53m

$447

OaklandToronto

OAK - YTZ

OAKYTZ

Oakland

Fri 5/23

5:30 am-6:17 pm

3 stops33h 47m

Toronto Island

Tue 5/27

3:35 pm-10:25 pm

3 stops33h 50m

$478

OaklandToronto

OAK - YYZ

OAKYYZ

Oakland

Tue 5/6

7:00 am-3:00 pm

1 stop29h 00m

Toronto Pearson Intl

Fri 5/9

4:45 pm-11:44 pm

1 stop9h 59m

$495

OaklandMontreal

OAK - YUL

OAKYUL

Oakland

Tue 6/3

4:55 pm-11:19 pm

2 stops27h 24m

Montreal Pierre Elliott Trudeau Intl

Tue 6/10

6:45 pm-4:16 pm

2 stops24h 31m

$509

OaklandMontreal

OAK - YUL

OAKYUL

Oakland

Mon 5/5

8:37 pm-12:37 am

3 stops25h 00m

$153

OaklandToronto

OAK - YYZ

OAKYYZ

Oakland

Fri 6/13

7:48 pm-8:54 pm

2 stops22h 06m

$159

OaklandToronto

OAK - YYZ

OAKYYZ

Oakland

Tue 4/22

7:00 am-3:00 pm

1 stop29h 00m

$229

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/25

Showing 1-10 of 14 results
1
2

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, January is the cheapest month in which you can book a flight from Oakland, California to Region of Ontario (average of $243). Flying from Oakland, California to Region of Ontario in July is currently the most expensive (average of $359). 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 March 28, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Oakland, California to Region of Ontario as you normally would.

Rainfall in Ontario by month

Plan your trip to Ontario by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Region of Ontario ranges from 2.0 - 3.3 inches per month. June is typically the wettest month, when rainfall can reach 3.3 in. February is typically the driest time to visit Region of Ontario when rainfall is around 2.0 in.

Temperature in Ontario by month

Plan your trip to Ontario by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Region of Ontario, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 69.8 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 21.2 F).

Reviews of airlines servicing Ontario

Get insights into the airlines that provide service to Ontario. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Ontario. Reviews last updated March 28, 2025.
Alaska Airlines
8.0
Very good
9,798 reviews

Boarding

8.2

Entertainment

7.1

Crew

8.5

Food

7.1

Comfort

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Alaska Airlines
8.0
Very good
9,798 reviews
Alaska Airlines
8.0
Very good
9,798 reviews

Boarding

8.2

Entertainment

7.1

Crew

8.5

Food

7.1

Comfort

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Delta
8.0
Very good
7,897 reviews
Alaska Airlines
8.0
Very good
9,798 reviews

Boarding

8.2

Entertainment

7.1

Crew

8.5

Food

7.1

Comfort

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Hawaiian Airlines
7.9
Good
2,336 reviews
Alaska Airlines
8.0
Very good
9,798 reviews

Boarding

8.2

Entertainment

7.1

Crew

8.5

Food

7.1

Comfort

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

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.

  • What are the cheapest airlines to fly from Oakland, California to Region of Ontario one-way?

    The cheapest airlines for a one-way flight from Oakland, California to Region of Ontario are Alaska Airlines ($229), Hawaiian Airlines ($476), and Delta ($500).

  • 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, January is the cheapest month in which you can book a flight from Oakland, California to Region of Ontario (average of $243). Flying from Oakland, California to Region of Ontario in July is currently the most expensive (average of $359). 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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Alternative routes for Oakland to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
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Top airline flying from Oakland to Ontario

Discover the top airline that operate flights from Oakland to Ontario. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated March 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$498Average$659FlexibilityNo cancel feeOn-timeN/A
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