Find flights
When to book
FAQs

Cheap flights from Oakland, CA to Ontario from C$ 214

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 23/2. Fares are subject to change and may not be available on all flights or dates of travel.
OAK — YYZ
28 Feb — 7 Mar1
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 29 January 2026.

Mon 2/36:15 a.m.
OAK
-
YYZ
1 stop30h 20m
Alaska Airlines
Wed 4/34:45 p.m.
YYZ
-
OAK
1 stop9h 04m
Alaska Airlines
Deal found 29/1C$ 494
Fri 27/26:15 a.m.
OAK
-
YYZ
1 stop30h 20m
Alaska Airlines
Tue 3/34:45 p.m.
YYZ
-
OAK
1 stop9h 04m
Alaska Airlines
Deal found 28/1C$ 521
Fri 20/26:15 a.m.
OAK
-
YYZ
1 stop30h 20m
Alaska Airlines
Mon 23/24:45 p.m.
YYZ
-
OAK
1 stop26h 52m
Alaska Airlines
Deal found 27/1C$ 523
Fri 20/26:15 a.m.
OAK
-
YYZ
1 stop30h 20m
Multiple Airlines
Wed 25/27:45 a.m.
YYZ
-
OAK
2 stops18h 04m
Multiple Airlines
Deal found 26/1C$ 524
Tue 17/26:15 a.m.
OAK
-
YYZ
1 stop30h 20m
Multiple Airlines
Wed 25/27:45 a.m.
YYZ
-
OAK
2 stops18h 04m
Multiple Airlines
Deal found 27/1C$ 527
Tue 17/26:15 a.m.
OAK
-
YYZ
1 stop30h 20m
Multiple Airlines
Tue 24/27:45 a.m.
YYZ
-
OAK
2 stops18h 04m
Multiple Airlines
Deal found 27/1C$ 529
Fri 27/26:15 a.m.
OAK
-
YYZ
1 stop30h 20m
Alaska Airlines
Sun 1/34:45 p.m.
YYZ
-
OAK
1 stop33h 04m
Alaska Airlines
Deal found 28/1C$ 535
Thu 26/26:15 a.m.
OAK
-
YYZ
1 stop30h 20m
Alaska Airlines
Mon 2/34:45 p.m.
YYZ
-
OAK
1 stop9h 04m
Alaska Airlines
Deal found 28/1C$ 538
Tue 24/25:31 p.m.
OAK
-
YYZ
1 stop19h 04m
Multiple Airlines
Mon 2/37:45 a.m.
YYZ
-
OAK
2 stops18h 04m
Multiple Airlines
Deal found 26/1C$ 539
Sat 28/26:15 a.m.
OAK
-
YYZ
1 stop30h 20m
Alaska Airlines
Tue 3/34:45 p.m.
YYZ
-
OAK
2 stops19h 39m
Alaska Airlines
Deal found 28/1C$ 544
Wed 25/25:31 p.m.
OAK
-
YYZ
1 stop19h 04m
Alaska Airlines
Tue 3/34:45 p.m.
YYZ
-
OAK
1 stop26h 52m
Alaska Airlines
Deal found 26/1C$ 551
Sat 23/55:05 p.m.
OAK
-
YUL
2 stops27h 29m
Delta
Fri 29/57:00 a.m.
YUL
-
OAK
2 stops36h 31m
Delta
Deal found 28/1C$ 840

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 29 January 2026.

Round-trip from

C$ 494

One-way from

C$ 214

Popular in

December

Cheapest in

February

Average price

C$ 532
Alaska Airlines
  • Alaska Airlines
  • 2/3-4/3
  • 2 total stops
  • 39h 24m total
  • Oakland to Ontario
Search Deals
Alaska Airlines
  • Alaska Airlines
  • 23/2
  • 1 total stop
  • 30h 20m total
  • Oakland to Ontario
Search Deals
Highest demand for flights based on searches. 12% potential increase in price (C$ 109 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (C$ 34 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
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 29 January 2026.
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

Mon 2/3

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

1 stop30h 20m

Toronto Pearson Intl

Wed 4/3

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

1 stop9h 04m

C$ 494

OaklandToronto

OAK - YYZ

OAKYYZ

Oakland

Mon 16/3

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

1 stop30h 20m

Toronto Pearson Intl

Tue 31/3

4:55 p.m.-11:43 p.m.

1 stop33h 48m

C$ 523

OaklandToronto

OAK - YYZ

OAKYYZ

Oakland

Sat 28/2

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

1 stop30h 20m

Toronto Pearson Intl

Tue 3/3

4:45 p.m.-9:24 a.m.

2 stops19h 39m

C$ 544

OaklandToronto

OAK - YYZ

OAKYYZ

Oakland

Mon 2/3

6:15 a.m.-12:29 a.m.

2 stops15h 14m

Toronto Pearson Intl

Wed 4/3

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

1 stop9h 04m

C$ 553

OaklandToronto

OAK - YYZ

OAKYYZ

Oakland

Fri 20/2

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

1 stop30h 20m

Toronto Pearson Intl

Tue 24/2

4:45 p.m.-9:24 a.m.

2 stops19h 39m

C$ 580

OaklandToronto

OAK - YYZ

OAKYYZ

Oakland

Tue 17/2

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

1 stop30h 20m

Toronto Pearson Intl

Sat 21/2

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

1 stop9h 04m

C$ 584

OaklandToronto

OAK - YYZ

OAKYYZ

Oakland

Mon 16/2

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

1 stop30h 20m

Toronto Pearson Intl

Mon 23/2

4:45 p.m.-9:24 a.m.

2 stops19h 39m

C$ 599

OaklandToronto

OAK - YYZ

OAKYYZ

Oakland

Thu 12/3

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

1 stop30h 20m

Toronto Pearson Intl

Thu 19/3

4:45 p.m.-11:43 p.m.

1 stop33h 58m

C$ 599

OaklandToronto

OAK - YYZ

OAKYYZ

Oakland

Mon 16/2

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

1 stop30h 20m

Toronto Pearson Intl

Fri 27/2

4:45 p.m.-9:24 a.m.

2 stops19h 39m

C$ 599

OaklandToronto

OAK - YYZ

OAKYYZ

Oakland

Tue 17/2

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

1 stop30h 20m

Toronto Pearson Intl

Mon 23/2

4:45 p.m.-9:24 a.m.

2 stops19h 39m

C$ 599

Flights are sorted by cheapest round-trip flights first.

Deals found on 27/1

Showing 1-10 of 56 results
1
2
3
...
6

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$ 172). Flying from Oakland, California to Region of Ontario in August is currently the most expensive (average of C$ 276). 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 27h 29m. Alaska Airlines provides one of the quickest options available for as low as C$ 840. 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 - Montreal Pierre Elliott Trudeau Intl or Oakland - Ottawa, Oakland - Toronto Pearson 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$ 172). Flying from Oakland, California to Region of Ontario in August is currently the most expensive (average of C$ 276). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Oakland to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
Los Angeles to Vancouver Intl flights
San Francisco to Vancouver Intl flights
San Francisco to Pearson Intl flights
Los Angeles to Pearson Intl flights
Los Angeles to Calgary flights
San Francisco to Calgary flights
Ontario to Vancouver Intl flights
Los Angeles to Pierre Elliott Trudeau Intl flights
Sacramento to Vancouver Intl flights
Santa Ana to Vancouver Intl flights
San Diego to Vancouver Intl flights
San Francisco to Pierre Elliott Trudeau Intl flights
San Diego to Pearson Intl flights
San Jose to Vancouver Intl flights
San Diego to Calgary flights
Los Angeles to Abbotsford flights
Los Angeles to Toronto Island flights
San Francisco to Toronto Island flights
San Francisco to Abbotsford flights
Ontario to Calgary flights
Ontario to Pearson Intl flights
Burbank to Vancouver Intl flights
Santa Ana to Calgary flights
Oakland to Vancouver Intl flights
Palm Springs to Vancouver Intl flights
Las Vegas to Pearson Intl flights
Los Angeles to Edmonton flights
San Diego to Pierre Elliott Trudeau Intl flights
Sacramento to Pearson Intl flights
Las Vegas to Calgary flights
San Jose to Pearson Intl flights
Las Vegas to Vancouver Intl flights
San Francisco to Kelowna flights
Reno to Vancouver Intl flights
Sacramento to Calgary flights
Ontario to Pierre Elliott Trudeau Intl flights
Santa Ana to Pearson Intl flights
Palm Springs to Pearson Intl flights
Los Angeles to Ottawa flights
Los Angeles to Kelowna flights
San Francisco to Victoria flights
San Jose to Calgary flights
Las Vegas to Pierre Elliott Trudeau Intl flights
Oakland to Calgary flights
Los Angeles to Québec City flights
San Francisco to Halifax flights
San Francisco to Edmonton flights
Palm Springs to Calgary flights
San Jose to Pierre Elliott Trudeau Intl flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Oakland to Ontario?

Cheapflights makes it easy to find Oakland to Ontario flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

Why should you use Cheapflights to find cheap flight tickets from Oakland to Ontario?

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Oakland to Ontario for you. Better yet — we are completely free to use.

Can Cheapflights find flights from Oakland to Ontario with no change fees?

Yes! Cheapflights helps users easily find flights from Oakland to Ontario with no change fees.

Can Cheapflights notify me if prices for flights from Oakland to Ontario become cheaper?

Yes! Start tracking prices for Oakland to Ontario flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.