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Cheap flights from Oakland, CA to Ontario from C$ 201

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 23/1. Fares are subject to change and may not be available on all flights or dates of travel.
OAK — YYZ
17 Jan — 24 Jan1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Oakland to Ontario

Enter your travel dates to find the best prices.

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 18 December 2025.

Tue 30/128:32 p.m.OAK - YYZ
2 stops16h 03mAlaska Airlines
Wed 7/14:45 p.m.YYZ - OAK
1 stop26h 38mAlaska Airlines
Deal found 16/12C$ 864
Thu 25/1212:34 p.m.OAK - YYZ
2 stops25h 45mDelta
Tue 6/16:13 p.m.YYZ - OAK
2 stops20h 44mDelta
Deal found 16/12C$ 984
Tue 30/129:35 a.m.OAK - YYZ
2 stops27h 00mAlaska Airlines
Tue 6/14:45 p.m.YYZ - OAK
1 stop10h 14mAlaska Airlines
Deal found 16/12C$ 992
Thu 25/1212:34 p.m.OAK - YYZ
2 stops25h 45mDelta
Wed 7/16:10 a.m.YYZ - OAK
2 stops19h 43mDelta
Deal found 16/12C$ 1,010
Wed 24/1212:34 p.m.OAK - YYZ
2 stops25h 45mDelta
Tue 6/16:00 a.m.YYZ - OAK
2 stops32h 57mDelta
Deal found 16/12C$ 1,099
Wed 24/1212:34 p.m.OAK - YYZ
2 stops25h 45mDelta
Wed 7/16:10 a.m.YYZ - OAK
2 stops19h 43mDelta
Deal found 16/12C$ 1,126
Thu 25/1212:34 p.m.OAK - YYZ
2 stops25h 45mDelta
Thu 1/16:10 a.m.YYZ - OAK
2 stops19h 37mDelta
Deal found 16/12C$ 1,133
Mon 29/125:53 a.m.OAK - YYZ
2 stops14h 27mDelta
Tue 6/16:13 p.m.YYZ - OAK
2 stops20h 44mDelta
Deal found 16/12C$ 1,150
Thu 25/1212:34 p.m.OAK - YYZ
2 stops25h 45mDelta
Mon 5/16:00 a.m.YYZ - OAK
2 stops19h 53mDelta
Deal found 16/12C$ 1,160
Mon 29/126:10 a.m.OAK - YYZ
1 stop30h 25mAlaska Airlines
Wed 7/14:45 p.m.YYZ - OAK
1 stop26h 38mAlaska Airlines
Deal found 16/12C$ 1,175
Sun 28/124:50 p.m.OAK - YUL
2 stops28h 09mDelta
Sun 4/17:00 a.m.YUL - OAK
2 stops19h 58mDelta
Deal found 15/12C$ 1,561
Wed 24/1212:34 p.m.OAK - YUL
2 stops32h 25mDelta
Sun 4/17:00 a.m.YUL - OAK
2 stops19h 58mDelta
Deal found 15/12C$ 1,606

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 18 December 2025.

Round-trip from

C$ 464

One-way from

C$ 201

Popular in

December

Cheapest in

February

Average price

C$ 885
Alaska Airlines
  • Alaska Airlines
  • 13/3-18/3
  • 2 total stops
  • 40h 14m total
  • Oakland to Ontario
Search Deals
Alaska Airlines
  • Alaska Airlines
  • 23/1
  • 1 total stop
  • 19h 18m total
  • Oakland to Ontario
Search Deals
Highest demand for flights based on searches. 13% potential increase in price (C$ 126 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (C$ 37 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 629,999 searches. Data last updated 18 December 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

Fri 13/3

6:14 a.m.-3:35 p.m.

1 stop30h 21m

Toronto Pearson Intl

Wed 18/3

4:45 p.m.-11:38 p.m.

1 stop9h 53m

C$ 464

OaklandToronto

OAK - YYZ

OAKYYZ

Oakland

Thu 8/1

5:17 p.m.-3:35 p.m.

1 stop19h 18m

Toronto Pearson Intl

Tue 13/1

4:45 p.m.-10:28 a.m.

1 stop20h 43m

C$ 478

OaklandToronto

OAK - YYZ

OAKYYZ

Oakland

Tue 17/2

5:31 p.m.-3:35 p.m.

1 stop19h 04m

Toronto Pearson Intl

Fri 20/2

4:45 p.m.-10:49 p.m.

1 stop9h 04m

C$ 479

OaklandToronto

OAK - YYZ

OAKYYZ

Oakland

Sun 18/1

8:10 a.m.-3:35 p.m.

1 stop28h 25m

Toronto Pearson Intl

Wed 21/1

4:45 p.m.-8:40 p.m.

1 stop30h 55m

C$ 479

OaklandToronto

OAK - YYZ

OAKYYZ

Oakland

Mon 16/2

6:15 a.m.-3:35 p.m.

1 stop30h 20m

Toronto Pearson Intl

Fri 20/2

4:45 p.m.-10:49 p.m.

1 stop9h 04m

C$ 479

OaklandToronto

OAK - YYZ

OAKYYZ

Oakland

Sun 15/2

6:15 a.m.-3:35 p.m.

1 stop30h 20m

Toronto Pearson Intl

Fri 20/2

4:45 p.m.-10:49 p.m.

1 stop9h 04m

C$ 493

OaklandToronto

OAK - YYZ

OAKYYZ

Oakland

Wed 18/2

5:31 p.m.-3:35 p.m.

1 stop19h 04m

Toronto Pearson Intl

Mon 23/2

4:45 p.m.-10:52 p.m.

1 stop9h 07m

C$ 493

OaklandToronto

OAK - YYZ

OAKYYZ

Oakland

Fri 30/1

5:17 p.m.-3:35 p.m.

1 stop19h 18m

Toronto Pearson Intl

Fri 6/2

4:45 p.m.-10:28 a.m.

1 stop20h 43m

C$ 493

OaklandMontreal

OAK - YUL

OAKYUL

Oakland

Tue 10/3

5:55 a.m.-11:37 a.m.

2 stops26h 42m

Montreal Pierre Elliott Trudeau Intl

Sun 15/3

12:42 p.m.-4:10 p.m.

2 stops30h 28m

C$ 829

OaklandMontreal

OAK - YUL

OAKYUL

Oakland

Fri 13/3

5:55 a.m.-11:59 p.m.

2 stops15h 04m

Montreal Pierre Elliott Trudeau Intl

Sun 15/3

12:42 p.m.-4:10 p.m.

2 stops30h 28m

C$ 876

Flights are sorted by cheapest round-trip flights first.

Deals found on 15/12

Showing 1-10 of 33 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 C$ 175). Flying from Oakland, California to Region of Ontario in August is currently the most expensive (average of C$ 278). 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.

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 11.3 km from the centre of the city.

  • How long is the flight from Oakland, California to Region of Ontario?

    A quick flight from Oakland, California to Region of Ontario can take about 26h 42m. Alaska Airlines provides one of the quickest options available for as low as C$ 829. The distance between Oakland, California and Region of Ontario is about 4056 km. This flight may include one or multiple stops.

  • What are the most popular routes from Oakland, California to Region of Ontario?

    While some choose either Oakland - Toronto Pearson Intl or Oakland - Hamilton, Oakland - Montreal Pierre Elliott Trudeau Intl is the most popular route from Oakland, California to Region of Ontario.

  • 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 C$ 175). Flying from Oakland, California to Region of Ontario in August is currently the most expensive (average of C$ 278). 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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See prices for flight routes from nearby airports that may be better suited for you.
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