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$119+ 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 7/30. Fares are subject to change and may not be available on all flights or dates of travel.
OAK — YYZ
Jul 6 — Jul 131
Sun 7/6
Sun 7/13
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 July 1, 2025.

Round-trip from

$255
(Kiwi.com)

One-way from

$119
(Mytrip)

Popular in

December

Cheapest in

February

Average price

$482
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. 11% potential increase in price ($57 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 July 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 July 1, 2025.

This Kiwi.com deal was found by Cheapflights users on 7/1. 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.
Thu 9/116:00 amOAK - YYZ
1 stop10h 58mMultiple Airlines
Mon 9/153:00 pmYYZ - OAK
2 stops35h 32mMultiple Airlines
Deal found 7/1$255
This Mytrip deal was found by Cheapflights users on 7/1. 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 7/186:00 amOAK - YHM
3 stops15h 41mMultiple Airlines
Mon 7/216:00 amYHM - OAK
3 stops29h 28mMultiple Airlines
Deal found 7/1$362
This Mytrip deal was found by Cheapflights users on 6/30. 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.
Thu 8/146:00 amOAK - YTZ
2 stops12h 20mMultiple Airlines
Thu 8/212:00 pmYTZ - OAK
2 stops12h 27mMultiple Airlines
Deal found 6/30$437
This Mytrip deal was found by Cheapflights users on 6/30. 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.
Thu 8/146:00 amOAK - YUL
2 stops15h 27mMultiple Airlines
Thu 8/214:00 pmYUL - OAK
2 stops18h 18mMultiple Airlines
Deal found 6/30$448
This Delta deal was found by Cheapflights users on 6/30. 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.
Mon 8/1812:35 pmOAK - YUL
2 stops20h 02mDelta
Sat 8/236:00 amYUL - OAK
2 stops19h 46mDelta
Deal found 6/30$626
This Travelocity deal was found by Cheapflights users on 7/1. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/266:15 amOAK - YOW
2 stops20h 08mMultiple Airlines
Mon 9/297:50 amYOW - OAK
2 stops14h 28mMultiple Airlines
Deal found 7/1$773

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 July 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

Thu 9/11

6:00 am-7:58 pm

1 stop10h 58m

Toronto Pearson Intl

Mon 9/15

3:00 pm-11:32 pm

2 stops35h 32m

$255

OaklandHamilton

OAK - YHM

OAKYHM

Oakland

Fri 7/18

6:00 am-12:41 am

3 stops15h 41m

Hamilton

Mon 7/21

6:00 am-8:28 am

3 stops29h 28m

$362

OaklandToronto

OAK - YTZ

OAKYTZ

Oakland

Thu 8/14

6:00 am-9:20 pm

2 stops12h 20m

Toronto Island

Thu 8/21

2:00 pm-11:27 pm

2 stops12h 27m

$437

OaklandMontreal

OAK - YUL

OAKYUL

Oakland

Thu 8/14

6:00 am-12:27 am

2 stops15h 27m

Montreal Pierre Elliott Trudeau Intl

Thu 8/21

4:00 pm-7:18 am

2 stops18h 18m

$448

OaklandMontreal

OAK - YUL

OAKYUL

Oakland

Mon 8/18

12:35 pm-11:37 am

2 stops20h 02m

Montreal Pierre Elliott Trudeau Intl

Sat 8/23

6:00 am-10:46 pm

2 stops19h 46m

$626

OaklandOttawa

OAK - YOW

OAKYOW

Oakland

Fri 9/26

6:15 am-5:23 am

2 stops20h 08m

Ottawa

Mon 9/29

7:50 am-7:18 pm

2 stops14h 28m

$773

OaklandToronto

OAK - YYZ

OAKYYZ

Oakland

Wed 7/30

9:23 am-6:20 am

1 stop17h 57m

$119

OaklandHamilton

OAK - YHM

OAKYHM

Oakland

Wed 7/30

6:00 am-12:41 am

2 stops15h 41m

$138

OaklandMontreal

OAK - YUL

OAKYUL

Oakland

Sat 8/2

6:00 am-4:00 pm

3 stops31h 00m

$175

OaklandToronto

OAK - YYZ

OAKYYZ

Oakland

Wed 12/10

8:00 am-3:35 pm

2 stops28h 35m

$176

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/30

Showing 1-10 of 15 results
1
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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, 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 August is currently the most expensive (average of $348). 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 July 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.

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 July 1, 2025.
Peruse reviews from past customers who have flown with Alaska Airlines, Delta, and Sun Country Air from Oakland to Ontario to help guide your decision. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Surinder,May 2025

SEA - YYZ

My wife wanted the aile seat and I always prefer window seat. Luckily we both got the best seats we wanted. The plane was very nice and we enjoyed the best take off and the smooth landing at Toronto. All the services by the staff inside the aeroplane were very nice well appreciated. Thanks again and hope to see you soon.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Surinder,May 2025

SEA - YYZ

My wife wanted the aile seat and I always prefer window seat. Luckily we both got the best seats we wanted. The plane was very nice and we enjoyed the best take off and the smooth landing at Toronto. All the services by the staff inside the aeroplane were very nice well appreciated. Thanks again and hope to see you soon.
Delta
8.0
Very good
7,974 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Surinder,May 2025

SEA - YYZ

My wife wanted the aile seat and I always prefer window seat. Luckily we both got the best seats we wanted. The plane was very nice and we enjoyed the best take off and the smooth landing at Toronto. All the services by the staff inside the aeroplane were very nice well appreciated. Thanks again and hope to see you soon.
Sun Country Air
6.9
Okay
340 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Surinder,May 2025

SEA - YYZ

My wife wanted the aile seat and I always prefer window seat. Luckily we both got the best seats we wanted. The plane was very nice and we enjoyed the best take off and the smooth landing at Toronto. All the services by the staff inside the aeroplane were very nice well appreciated. Thanks again and hope to see you soon.

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 ($176), Delta ($197), and Sun Country Air ($219).

  • 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 August is currently the most expensive (average of $348). 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 July 1, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$456Average$568FlexibilityNo cancel feeOn-timeN/A

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