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Cheap flights from Oakland, CA to Ontario from C$ 254

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 3/12. Fares are subject to change and may not be available on all flights or dates of travel.
OAK — YYZ
2 Dec — 9 Dec1
1 adult
1 adult, Economy, 0 bags

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 2 November 2025.

Round-trip from

C$ 567

One-way from

C$ 254

Popular in

December

Cheapest in

April

Average price

C$ 616
Alaska Airlines
  • Alaska Airlines
  • 5/3-8/3
  • 2 total stops
  • 39h 58m total
  • Oakland to Ontario
Search Deals
Alaska Airlines
  • Alaska Airlines
  • 3/12
  • 1 total stop
  • 22h 04m total
  • Oakland to Ontario
Search Deals
Highest demand for flights based on searches. 9% potential increase in price (C$ 90 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (C$ 29 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2025
Search Deals

Find 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 2 November 2025.

Wed 10/126:40 a.m.OAK - YYZ
1 stop29h 55mAlaska Airlines
Sun 14/124:45 p.m.YYZ - OAK
1 stop10h 14mAlaska Airlines
Deal found 2/11C$ 594
Mon 8/126:40 a.m.OAK - YYZ
2 stops21h 18mMultiple Airlines
Sun 14/124:45 p.m.YYZ - OAK
1 stop10h 14mMultiple Airlines
Deal found 1/11C$ 605
Mon 8/122:31 p.m.OAK - YYZ
1 stop22h 04mAlaska Airlines
Sun 14/124:45 p.m.YYZ - OAK
1 stop23h 47mAlaska Airlines
Deal found 1/11C$ 623
Mon 8/124:50 p.m.OAK - YYZ
2 stops15h 17mDelta
Sun 14/123:38 p.m.YYZ - OAK
2 stops11h 30mDelta
Deal found 1/11C$ 691
Tue 16/122:31 p.m.OAK - YYZ
1 stop22h 04mAlaska Airlines
Tue 23/124:45 p.m.YYZ - OAK
1 stop19h 21mAlaska Airlines
Deal found 1/11C$ 758
Wed 17/122:31 p.m.OAK - YYZ
2 stops26h 24mMultiple Airlines
Wed 24/124:45 p.m.YYZ - OAK
1 stop10h 14mMultiple Airlines
Deal found 2/11C$ 773
Wed 17/125:55 a.m.OAK - YYZ
2 stops15h 04mDelta
Wed 24/126:10 a.m.YYZ - OAK
2 stops19h 37mDelta
Deal found 2/11C$ 784
Wed 17/122:31 p.m.OAK - YYZ
1 stop22h 04mAlaska Airlines
Wed 24/124:45 p.m.YYZ - OAK
1 stop10h 14mAlaska Airlines
Deal found 2/11C$ 842
Thu 27/1112:20 p.m.OAK - YYZ
1 stop24h 15mAlaska Airlines
Mon 1/124:45 p.m.YYZ - OAK
1 stop23h 47mAlaska Airlines
Deal found 2/11C$ 915
Sat 6/125:55 a.m.OAK - YUL
2 stops14h 52mDelta
Wed 10/126:00 a.m.YUL - OAK
2 stops13h 04mDelta
Deal found 1/11C$ 929
Mon 24/116:15 a.m.OAK - YYZ
1 stop30h 20mAlaska Airlines
Mon 1/124:45 p.m.YYZ - OAK
1 stop23h 47mAlaska Airlines
Deal found 2/11C$ 999
Sat 6/1212:30 p.m.OAK - YUL
2 stops15h 55mMultiple Airlines
Wed 10/127:30 p.m.YUL - OAK
3 stops27h 27mMultiple Airlines
Deal found 1/11C$ 1,111

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 2 November 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 11/12

6:40 a.m.-3:35 p.m.

1 stop29h 55m

Toronto Pearson Intl

Sun 14/12

4:45 p.m.-1:32 p.m.

1 stop23h 47m

C$ 581

OaklandToronto

OAK - YYZ

OAKYYZ

Oakland

Sun 15/2

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

1 stop18h 00m

Toronto Pearson Intl

Sun 22/2

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

1 stop9h 53m

C$ 597

OaklandToronto

OAK - YYZ

OAKYYZ

Oakland

Mon 8/12

2:31 p.m.-3:35 p.m.

1 stop22h 04m

Toronto Pearson Intl

Sun 14/12

4:45 p.m.-1:32 p.m.

1 stop23h 47m

C$ 623

OaklandToronto

OAK - YYZ

OAKYYZ

Oakland

Mon 8/12

4:50 p.m.-11:07 a.m.

2 stops15h 17m

Toronto Pearson Intl

Sun 14/12

3:38 p.m.-12:08 a.m.

2 stops11h 30m

C$ 691

OaklandToronto

OAK - YYZ

OAKYYZ

Oakland

Tue 3/3

6:35 p.m.-10:57 a.m.

2 stops13h 22m

Toronto Pearson Intl

Wed 4/3

4:45 p.m.-5:43 p.m.

1 stop27h 58m

C$ 723

OaklandToronto

OAK - YYZ

OAKYYZ

Oakland

Mon 15/12

9:26 a.m.-3:35 p.m.

2 stops27h 09m

Toronto Pearson Intl

Mon 22/12

4:45 p.m.-11:59 p.m.

1 stop34h 14m

C$ 748

OaklandToronto

OAK - YYZ

OAKYYZ

Oakland

Tue 16/12

2:31 p.m.-3:35 p.m.

1 stop22h 04m

Toronto Pearson Intl

Tue 23/12

4:45 p.m.-9:06 a.m.

1 stop19h 21m

C$ 758

OaklandToronto

OAK - YYZ

OAKYYZ

Oakland

Thu 5/3

6:30 a.m.-10:36 p.m.

2 stops13h 06m

Toronto Pearson Intl

Sun 8/3

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

1 stop9h 53m

C$ 769

OaklandToronto

OAK - YYZ

OAKYYZ

Oakland

Wed 17/12

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

2 stops15h 04m

Toronto Pearson Intl

Wed 24/12

6:10 a.m.-10:47 p.m.

2 stops19h 37m

C$ 784

OaklandMontreal

OAK - YUL

OAKYUL

Oakland

Sat 6/12

5:55 a.m.-11:47 p.m.

2 stops14h 52m

Montreal Pierre Elliott Trudeau Intl

Wed 10/12

6:00 a.m.-4:04 p.m.

2 stops13h 04m

C$ 929

Flights are sorted by cheapest round-trip flights first.

Deals found on 30/10

Showing 1-10 of 36 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$ 178). Flying from Oakland, California to Region of Ontario in August is currently the most expensive (average of C$ 284). 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 15h 17m. Alaska Airlines provides one of the quickest options available for as low as C$ 691. The distance between Oakland, California and Region of Ontario is about 3610 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 - Toronto Island, 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$ 178). Flying from Oakland, California to Region of Ontario in August is currently the most expensive (average of C$ 284). 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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