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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 7/17. Fares are subject to change and may not be available on all flights or dates of travel.
OAK — YYZ
May 6 — May 131
Tue 5/6
Tue 5/13
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 May 1, 2025.

Most accurate provider

Mytrip
3 stars

Most trusted provider

Mytrip
3 stars

Round-trip from

$262
(Mytrip)

One-way from

$175
(Kiwi.com)

Popular in

December

Cheapest in

February

Average price

$478
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. 8% potential increase in price ($42 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($15 potential savings vs. average RT price).
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Average for round-trip flights in May 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 May 1, 2025.

This Mytrip deal was found by Cheapflights users on 4/29. 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.
Wed 6/115:45 amOAK - YYZ
2 stops22h 07mMultiple Airlines
Wed 6/1812:00 pmYYZ - OAK
3 stops35h 43mMultiple Airlines
Deal found 4/29$262
This Mytrip deal was found by Cheapflights users on 4/30. 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 5/2511:51 amOAK - YHM
3 stops33h 50mMultiple Airlines
Mon 6/26:00 amYHM - OAK
3 stops31h 56mMultiple Airlines
Deal found 4/30$374
This Mytrip deal was found by Cheapflights users on 4/30. 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 5/255:45 amOAK - YTZ
2 stops13h 37mMultiple Airlines
Mon 6/26:45 amYTZ - OAK
2 stops16h 29mMultiple Airlines
Deal found 4/30$407
This Mytrip deal was found by Cheapflights users on 4/29. 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.
Sun 6/224:50 pmOAK - YUL
3 stops28h 53mMultiple Airlines
Wed 6/256:45 amYUL - OAK
2 stops19h 41mMultiple Airlines
Deal found 4/29$438
This Alaska Airlines deal was found by Cheapflights users on 4/30. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/277:54 pmOAK - YYZ
1 stop16h 06mAlaska Airlines
Sat 6/74:45 pmYYZ - OAK
1 stop10h 01mAlaska Airlines
Deal found 4/30$443
This Delta deal was found by Cheapflights users on 4/30. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/316:00 amOAK - YYZ
1 stop7h 40mDelta
Sat 6/75:50 pmYYZ - OAK
1 stop7h 45mDelta
Deal found 4/30$448
This Mytrip deal was found by Cheapflights users on 4/30. 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 6/159:38 pmOAK - YOW
3 stops24h 03mMultiple Airlines
Sun 6/225:15 pmYOW - OAK
3 stops33h 11mMultiple Airlines
Deal found 4/30$461
This Delta deal was found by Cheapflights users on 4/30. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/286:00 amOAK - YUL
2 stops14h 18mDelta
Thu 7/36:00 amYUL - OAK
2 stops19h 28mDelta
Deal found 4/30$540

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 May 1, 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

Wed 6/11

5:45 am-6:52 am

2 stops22h 07m

Toronto Pearson Intl

Wed 6/18

12:00 pm-8:43 pm

3 stops35h 43m

$262

OaklandHamilton

OAK - YHM

OAKYHM

Oakland

Sun 5/25

11:51 am-12:41 am

3 stops33h 50m

Hamilton

Mon 6/2

6:00 am-10:56 am

3 stops31h 56m

$374

OaklandToronto

OAK - YTZ

OAKYTZ

Oakland

Sun 5/25

5:45 am-10:22 pm

2 stops13h 37m

Toronto Island

Mon 6/2

6:45 am-8:14 pm

2 stops16h 29m

$407

OaklandMontreal

OAK - YUL

OAKYUL

Oakland

Sun 6/22

4:50 pm-12:43 am

3 stops28h 53m

Montreal Pierre Elliott Trudeau Intl

Wed 6/25

6:45 am-11:26 pm

2 stops19h 41m

$438

OaklandToronto

OAK - YYZ

OAKYYZ

Oakland

Tue 5/27

7:54 pm-3:00 pm

1 stop16h 06m

Toronto Pearson Intl

Sat 6/7

4:45 pm-11:46 pm

1 stop10h 01m

$443

OaklandToronto

OAK - YYZ

OAKYYZ

Oakland

Sat 5/31

6:00 am-4:40 pm

1 stop7h 40m

Toronto Pearson Intl

Sat 6/7

5:50 pm-10:35 pm

1 stop7h 45m

$448

OaklandOttawa

OAK - YOW

OAKYOW

Oakland

Sun 6/15

9:38 pm-12:41 am

3 stops24h 03m

Ottawa

Sun 6/22

5:15 pm-11:26 pm

3 stops33h 11m

$461

OaklandMontreal

OAK - YUL

OAKYUL

Oakland

Sat 6/28

6:00 am-11:18 pm

2 stops14h 18m

Montreal Pierre Elliott Trudeau Intl

Thu 7/3

6:00 am-10:28 pm

2 stops19h 28m

$540

OaklandToronto

OAK - YYZ

OAKYYZ

Oakland

Thu 7/17

9:09 pm-12:33 am

3 stops24h 24m

$175

OaklandToronto

OAK - YYZ

OAKYYZ

Oakland

Thu 7/24

1:49 pm-11:50 am

1 stop19h 01m

$189

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/30

Showing 1-10 of 15 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 May 1, 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 May 1, 2025.
Get a feel of what it's like to fly with Alaska Airlines, Delta and Sun Country Air from Oakland to Ontario by reading reviews from past customers. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
9,972 reviews

Entertainment

7.1

Food

7.1

Overall

8.0

Boarding

8.1

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very good
9,972 reviews
Alaska Airlines
8.0
Very good
9,972 reviews

Entertainment

7.1

Food

7.1

Overall

8.0

Boarding

8.1

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Delta
8.0
Very good
7,934 reviews
Alaska Airlines
8.0
Very good
9,972 reviews

Entertainment

7.1

Food

7.1

Overall

8.0

Boarding

8.1

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Sun Country Air
6.9
Okay
346 reviews
Alaska Airlines
8.0
Very good
9,972 reviews

Entertainment

7.1

Food

7.1

Overall

8.0

Boarding

8.1

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

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 Sun Country Air ($189), Delta ($196), and Alaska Airlines ($254).

  • 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, 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 May 1, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$485Average$648FlexibilityNo cancel feeOn-timeN/A

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