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Cheap flights from Oakland, CA to Ontario from C$ 90

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 12/6. Fares are subject to change and may not be available on all flights or dates of travel.
OAK — YYZ
22 Apr — 29 Apr1
1 adult

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 17 April 2025.

Round-trip from

C$ 251

One-way from

C$ 90

Popular in

December

Cheapest in

February

Average price

C$ 520
4/6-10/6
  • 4/6-10/6
  • 3 total stops
  • 25h 39m total
  • Oakland to Ontario
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12/6
  • 12/6
  • 3 total stops
  • 23h 46m total
  • Oakland to Ontario
Search Deals
Highest demand for flights based on searches. 8% potential increase in price (C$ 79 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).
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Average for round-trip flights in April 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 17 April 2025.

Wed 4/65:45 a.m.OAK - YYZ
1 stop11h 14mMultiple Airlines
Tue 10/611:00 a.m.YYZ - OAK
2 stops14h 25mMultiple Airlines
Deal found 17/4C$ 251
Thu 1/57:46 a.m.OAK - YHM
2 stops13h 55mMultiple Airlines
Fri 2/56:00 a.m.YHM - OAK
3 stops27h 49mMultiple Airlines
Deal found 16/4C$ 403
Mon 2/65:45 a.m.OAK - YOW
3 stops33h 36mMultiple Airlines
Mon 9/67:50 a.m.YOW - OAK
3 stops30h 06mMultiple Airlines
Deal found 17/4C$ 469
Sun 8/611:51 a.m.OAK - YUL
3 stops33h 52mMultiple Airlines
Wed 18/63:10 p.m.YUL - OAK
2 stops27h 45mMultiple Airlines
Deal found 17/4C$ 480
Sat 7/66:00 a.m.OAK - YYZ
1 stop7h 40mDelta
Sat 14/65:50 p.m.YYZ - OAK
1 stop8h 18mDelta
Deal found 17/4C$ 621
Sun 1/67:00 a.m.OAK - YYZ
1 stop29h 00mAlaska Airlines
Tue 10/64:45 p.m.YYZ - OAK
1 stop8h 26mAlaska Airlines
Deal found 17/4C$ 636
Fri 6/66:00 a.m.OAK - YUL
2 stops28h 41mDelta
Fri 20/66:20 a.m.YUL - OAK
2 stops32h 30mDelta
Deal found 17/4C$ 686

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 17 April 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 4/6

5:45 a.m.-7:59 p.m.

1 stop11h 14m

Toronto Pearson Intl

Tue 10/6

11:00 a.m.-10:25 p.m.

2 stops14h 25m

C$ 251

OaklandHamilton

OAK - YHM

OAKYHM

Oakland

Thu 1/5

7:46 a.m.-12:41 a.m.

2 stops13h 55m

Hamilton

Fri 2/5

6:00 a.m.-6:49 a.m.

3 stops27h 49m

C$ 403

OaklandOttawa

OAK - YOW

OAKYOW

Oakland

Mon 2/6

5:45 a.m.-6:21 p.m.

3 stops33h 36m

Ottawa

Mon 9/6

7:50 a.m.-10:56 a.m.

3 stops30h 06m

C$ 469

OaklandMontreal

OAK - YUL

OAKYUL

Oakland

Sun 8/6

11:51 a.m.-12:43 a.m.

3 stops33h 52m

Montreal Pierre Elliott Trudeau Intl

Wed 18/6

3:10 p.m.-3:55 p.m.

2 stops27h 45m

C$ 480

OaklandToronto

OAK - YYZ

OAKYYZ

Oakland

Sat 7/6

6:00 a.m.-4:40 p.m.

1 stop7h 40m

Toronto Pearson Intl

Mon 9/6

5:50 p.m.-11:57 p.m.

1 stop9h 07m

C$ 621

OaklandToronto

OAK - YYZ

OAKYYZ

Oakland

Sun 1/6

7:00 a.m.-3:00 p.m.

1 stop29h 00m

Toronto Pearson Intl

Tue 10/6

4:45 p.m.-10:11 p.m.

1 stop8h 26m

C$ 636

OaklandMontreal

OAK - YUL

OAKYUL

Oakland

Fri 6/6

6:00 a.m.-1:41 p.m.

2 stops28h 41m

Montreal Pierre Elliott Trudeau Intl

Tue 17/6

6:45 p.m.-11:57 p.m.

2 stops32h 12m

C$ 686

OaklandToronto

OAK - YYZ

OAKYYZ

Oakland

Thu 12/6

9:38 p.m.-12:24 a.m.

3 stops23h 46m

C$ 90

OaklandMontreal

OAK - YUL

OAKYUL

Oakland

Thu 1/5

9:57 a.m.-7:57 p.m.

2 stops31h 00m

C$ 233

OaklandToronto

OAK - YYZ

OAKYYZ

Oakland

Sat 14/6

6:00 a.m.-4:44 p.m.

1 stop7h 44m

C$ 272

Flights are sorted by cheapest round-trip flights first.

Deals found on 16/4

Showing 1-10 of 12 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, January is the cheapest month in which you can book a flight from Oakland, California to Region of Ontario (average of C$ 167). Flying from Oakland, California to Region of Ontario in July is currently the most expensive (average of C$ 258). 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.

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 51.0 - 83.0 mm per month. June is typically the wettest month, when rainfall can reach 83.0 mm. February is typically the driest time to visit Region of Ontario when rainfall is around 51.0 mm.

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 21.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around -6.0 C).

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 17 April 2025.
See what other customers who have flown with Alaska Airlines and Delta from Oakland to Ontario have to say. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
9,887 reviews
Check prices

Entertainment

7.1

Comfort

7.9

Crew

8.5

Overall

8.0

Food

7.1

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Alaska Airlines
8.0
Very good
9,887 reviews
Alaska Airlines
8.0
Very good
9,887 reviews
Check prices

Entertainment

7.1

Comfort

7.9

Crew

8.5

Overall

8.0

Food

7.1

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Delta
8.0
Very good
7,916 reviews
Alaska Airlines
8.0
Very good
9,887 reviews
Check prices

Entertainment

7.1

Comfort

7.9

Crew

8.5

Overall

8.0

Food

7.1

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

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.

  • 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 - Hamilton, 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, January is the cheapest month in which you can book a flight from Oakland, California to Region of Ontario (average of C$ 167). Flying from Oakland, California to Region of Ontario in July is currently the most expensive (average of C$ 258). 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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How does Cheapflights help users find flights from Oakland to Ontario?

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