What are the cheapest airlines to fly from Region of Ontario to Oakland, California one-way?

The cheapest airline one-way is Delta, with whom users have recently found tickets for as low as C$ 291. However, be on the lookout for offers from Alaska Airlines and Sun Country Air, as they are both options that can get you from Region of Ontario to Oakland, California for a low price.

In terms of precipitation, rainfall in Oakland, California ranges from 0.0 - 122.0 mm per month. January is typically the wettest month, when rainfall can reach 122.0 mm. July is typically the driest time to visit Oakland, California when rainfall is around 0.0 mm.

If weather is an important factor for your trip to Oakland, California, use this chart to help with planning. For those seeking warmer temperatures, August is the ideal time of year to visit, when temperatures reach an average of 19.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 11.0 C).

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

The most popular route from Region of Ontario to Oakland, California is Toronto Pearson Intl - Oakland. You may also consider Montreal Pierre Elliott Trudeau Intl - Oakland or Toronto Region of Waterloo Intl - Oakland.

How far in advance should I book a flight from Region of Ontario to Oakland, California?

To save on the cost of your flight from Region of Ontario to Oakland, California, book at least 44 days before your planned departure. Booking around this time can save you about 89% on the cost of this flight compared to booking a flight leaving this week. We have found prices from C$ 586 if you need a flight within two weeks. For flights within the next 72 hours, you can find tickets from as low as C$ 1,028.

What is the cheapest month to fly from Region of Ontario to Oakland, California?

April is one of the best times of the year to fly to Oakland, California from Region of Ontario. Prices for April average C$ 535 per person but you can even find prices for as low as C$ 295. The most expensive prices can be found in the month of December. Opting for a April flight can save you 26% on your journey compared to booking in December

What is the cheapest time of day to fly from ON to OAK?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Region of Ontario to Oakland, California as you normally would.

What airport do you fly into for flights to Oakland from Ontario?

Oakland (OAK) is the airport you will fly into if you book a flight from Ontario to Oakland. It is only a 11.3 km journey from Oakland (OAK) to Oakland’s city centre.

Can I find deals for flights from Ontario to Oakland that include hotel bookings?

Yes. In addition to deals on Ontario to Oakland flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from Ontario to Oakland?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Oakland.

Can I find deals for business class flights from Ontario to Oakland?

Yes. Cheapflights offers flight deals from Ontario to Oakland by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

C$ 252+ Flights from Ontario to Oakland, CA

Cheap flight deals from Ontario to Oakland

Round-trip from	C$ 499
One-way from	C$ 252
Popular in	December
Cheapest in	April
Average price	C$ 612

26/9-30/9
4 total stops
62h 25m total
Ontario to Oakland

Search Deals

25/9
2 total stops
15h 52m total
Ontario to Oakland

Search Deals

Highest demand for flights based on searches. 5% potential increase in price (C$ 43 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease (C$ 19 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in July 2025

Search Deals

Find flight deals from Ontario to Oakland

Cheapest flights from Ontario to Oakland
Explore the most affordable flight options available from Ontario to Oakland. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 31 July 2025.

Fri 26/97:45 p.m.YYZ - OAK

2 stops30h 47mMultiple Airlines

Tue 30/96:00 a.m.OAK - YYZ

2 stops31h 38mMultiple Airlines

Deal found 29/7C$ 499

Thu 2/105:43 p.m.YYZ - OAK

1 stop9h 07mDelta

Sun 12/105:55 a.m.OAK - YYZ

1 stop7h 45mDelta

Deal found 28/7C$ 503

Fri 12/96:00 a.m.YKF - OAK

3 stops28h 38mMultiple Airlines

Fri 19/96:00 a.m.OAK - YKF

2 stops15h 45mMultiple Airlines

Deal found 29/7C$ 506

Sat 4/104:45 p.m.YYZ - OAK

1 stop10h 18mAlaska Airlines

Tue 14/106:40 a.m.OAK - YYZ

1 stop29h 20mAlaska Airlines

Deal found 28/7C$ 519

Sat 15/117:00 a.m.YUL - OAK

2 stops18h 53mDelta

Wed 3/125:05 p.m.OAK - YUL

2 stops27h 29mDelta

Deal found 30/7C$ 641

Fri 12/96:00 a.m.YHM - OAK

2 stops20h 32mMultiple Airlines

Fri 19/96:00 a.m.OAK - YHM

3 stops15h 40mMultiple Airlines

Deal found 29/7C$ 719

Sat 16/81:10 p.m.YUL - OAK

2 stops13h 17mMultiple Airlines

Fri 22/812:30 p.m.OAK - YUL

2 stops16h 00mMultiple Airlines

Deal found 30/7C$ 957

Best flights from Ontario to Oakland
Discover carefully curated flight deals from Ontario to Oakland that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 31 July 2025.

Fri 26/97:45 p.m.YYZ - OAK

2 stops30h 47mMultiple Airlines

Tue 30/96:00 a.m.OAK - YYZ

2 stops31h 38mMultiple Airlines

Deal found 29/7C$ 499

Thu 2/105:43 p.m.YYZ - OAK

1 stop9h 07mDelta

Sun 12/105:55 a.m.OAK - YYZ

1 stop7h 45mDelta

Deal found 28/7C$ 503

Sat 4/104:45 p.m.YYZ - OAK

1 stop10h 18mAlaska Airlines

Tue 14/106:40 a.m.OAK - YYZ

1 stop29h 20mAlaska Airlines

Deal found 28/7C$ 519

Fri 12/96:00 a.m.YKF - OAK

3 stops28h 38mMultiple Airlines

Fri 19/96:00 a.m.OAK - YKF

2 stops15h 45mMultiple Airlines

Deal found 29/7C$ 506

Sat 15/117:00 a.m.YUL - OAK

2 stops18h 53mDelta

Wed 3/125:05 p.m.OAK - YUL

2 stops27h 29mDelta

Deal found 30/7C$ 641

Fri 12/96:00 a.m.YHM - OAK

2 stops20h 32mMultiple Airlines

Fri 19/96:00 a.m.OAK - YHM

3 stops15h 40mMultiple Airlines

Deal found 29/7C$ 719

Sat 16/81:10 p.m.YUL - OAK

2 stops13h 17mMultiple Airlines

Fri 22/812:30 p.m.OAK - YUL

2 stops16h 00mMultiple Airlines

Deal found 30/7C$ 957

Last-minute flights from Ontario to Oakland
Discover last-minute flight deals from Ontario to Oakland. Data last updated 31 July 2025 and is based on user searches.

Tue 5/84:45 p.m.YYZ - OAK

1 stop10h 16mAlaska Airlines

Tue 19/87:00 a.m.OAK - YYZ

1 stop29h 00mAlaska Airlines

Deal found 31/7C$ 1,345

Sat 9/812:16 p.m.YYZ - OAK

2 stops13h 35mDelta

Wed 20/86:00 a.m.OAK - YYZ

2 stops14h 59mDelta

Deal found 29/7C$ 1,010

Sun 10/812:30 a.m.YYZ - OAK

2 stops26h 03mMultiple Airlines

Fri 15/86:00 a.m.OAK - YYZ

1 stop8h 17mMultiple Airlines

Deal found 28/7C$ 1,025

Mon 11/88:05 p.m.YYZ - OAK

1 stop15h 23mMultiple Airlines

Fri 15/86:00 a.m.OAK - YYZ

1 stop8h 17mMultiple Airlines

Deal found 28/7C$ 578

Mon 11/87:05 a.m.YHM - OAK

2 stops28h 23mMultiple Airlines

Wed 13/810:44 a.m.OAK - YHM

3 stops27h 00mMultiple Airlines

Deal found 29/7C$ 971

Tue 12/87:45 a.m.YYZ - OAK

2 stops19h 05mDelta

Fri 22/86:00 a.m.OAK - YYZ

2 stops13h 58mDelta

Deal found 29/7C$ 783

Sat 16/81:10 p.m.YUL - OAK

2 stops13h 17mMultiple Airlines

Fri 22/812:30 p.m.OAK - YUL

2 stops16h 00mMultiple Airlines

Deal found 30/7C$ 957

Fri 22/84:45 p.m.YYZ - OAK

1 stop10h 14mAlaska Airlines

Mon 1/96:15 a.m.OAK - YYZ

1 stop29h 45mAlaska Airlines

Deal found 30/7C$ 1,141

One-way flights from Ontario to Oakland
Search for one-way flight options from Ontario to Oakland. Find affordable one-way fares based on user searches. Data last updated 31 July 2025.

Thu 25/910:40 a.m.YYZ - OAK

2 stops15h 52mMultiple Airlines

Deal found 30/7C$ 252

Fri 12/96:13 p.m.YYZ - OAK

2 stops8h 37mDelta

Deal found 30/7C$ 291

Wed 22/104:45 p.m.YYZ - OAK

1 stop10h 18mAlaska Airlines

Deal found 31/7C$ 292

Thu 28/86:45 a.m.YUL - OAK

2 stops19h 42mMultiple Airlines

Deal found 29/7C$ 294

Thu 14/811:40 a.m.YYZ - OAK

1 stop7h 47mSun Country Air

Deal found 29/7C$ 303

Sat 30/87:00 a.m.YUL - OAK

2 stops18h 46mDelta

Deal found 30/7C$ 370

Sat 13/96:00 a.m.YKF - OAK

2 stops20h 32mMultiple Airlines

Deal found 30/7C$ 417

Sat 13/99:35 a.m.YOW - OAK

2 stops11h 52mMultiple Airlines

Deal found 30/7C$ 2,411

Fly from

Fly to

Route

Depart

Return

Price

TorontoOakland

YYZ - OAK

YYZOAK

Toronto Pearson Intl

Fri 26/9

7:45 p.m.-11:32 p.m.

2 stops30h 47m

Oakland

Tue 30/9

6:00 a.m.-4:38 p.m.

2 stops31h 38m

C$ 499

TorontoOakland

YYZ - OAK

YYZOAK

Toronto Pearson Intl

Thu 2/10

5:43 p.m.-11:50 p.m.

1 stop9h 07m

Oakland

Sun 12/10

5:55 a.m.-4:40 p.m.

1 stop7h 45m

C$ 503

TorontoOakland

YKF - OAK

YKFOAK

Toronto Region of Waterloo Intl

Fri 12/9

6:00 a.m.-7:38 a.m.

3 stops28h 38m

Oakland

Fri 19/9

6:00 a.m.-12:45 a.m.

2 stops15h 45m

C$ 506

TorontoOakland

YYZ - OAK

YYZOAK

Toronto Pearson Intl

Sat 4/10

4:45 p.m.-12:03 a.m.

1 stop10h 18m

Oakland

Tue 14/10

6:40 a.m.-3:00 p.m.

1 stop29h 20m

C$ 519

MontrealOakland

YUL - OAK

YULOAK

Montreal Pierre Elliott Trudeau Intl

Sat 15/11

7:00 a.m.-10:53 p.m.

2 stops18h 53m

Oakland

Wed 3/12

5:05 p.m.-11:34 p.m.

2 stops27h 29m

C$ 641

HamiltonOakland

YHM - OAK

YHMOAK

Hamilton

Fri 12/9

6:00 a.m.-11:32 p.m.

2 stops20h 32m

Oakland

Fri 19/9

6:00 a.m.-12:40 a.m.

3 stops15h 40m

C$ 719

MontrealOakland

YUL - OAK

YULOAK

Montreal Pierre Elliott Trudeau Intl

Sat 16/8

1:10 p.m.-11:27 p.m.

2 stops13h 17m

Oakland

Fri 22/8

12:30 p.m.-7:30 a.m.

2 stops16h 00m

C$ 957

TorontoOakland

YYZ - OAK

YYZOAK

Toronto Pearson Intl

Thu 25/9

10:40 a.m.-11:32 p.m.

2 stops15h 52m

C$ 252

TorontoOakland

YYZ - OAK

YYZOAK

Toronto Pearson Intl

Fri 12/9

6:13 p.m.-11:50 p.m.

2 stops8h 37m

C$ 291

TorontoOakland

YYZ - OAK

YYZOAK

Toronto Pearson Intl

Wed 22/10

4:45 p.m.-12:03 a.m.

1 stop10h 18m

C$ 292

Flights are sorted by cheapest round-trip flights first.

Deals found on 30/7

Showing 1-10 of 15 results

Best time to book a flight from Ontario to Oakland

Have a flexible travel schedule? Discover the best time to fly to Oakland from Ontario 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 Ontario to Oakland

No data available for this route at this time. Please check back soon.

Reviews of airlines servicing Oakland

Read reviews from past customers who have flown Alaska Airlines,Delta, andSun Country Air from Ontario to Oakland. 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

10,000 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

Alaska Airlines

8.0

Very good

10,000 reviews

Alaska Airlines

8.0

Very good

10,000 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

Delta

8.0

Very good

7,980 reviews

Alaska Airlines

8.0

Very good

10,000 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

Sun Country Air

6.9

Okay

334 reviews

Alaska Airlines

8.0

Very good

10,000 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

Related info for your journey

What airport do you fly into for flights to Oakland from Ontario?
Oakland (OAK) is the airport you will fly into if you book a flight from Ontario to Oakland. It is only a 11.3 km journey from Oakland (OAK) to Oakland’s city centre.
What are the cheapest airlines to fly from Region of Ontario to Oakland, California one-way?
The cheapest airline one-way is Delta, with whom users have recently found tickets for as low as C$ 291. However, be on the lookout for offers from Alaska Airlines and Sun Country Air, as they are both options that can get you from Region of Ontario to Oakland, California for a low price.
What are the most popular routes from Region of Ontario to Oakland, California?
The most popular route from Region of Ontario to Oakland, California is Toronto Pearson Intl - Oakland. You may also consider Montreal Pierre Elliott Trudeau Intl - Oakland or Toronto Region of Waterloo Intl - Oakland.
Can I find deals for flights from Ontario to Oakland that include hotel bookings?
Yes. In addition to deals on Ontario to Oakland flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Ontario to Oakland?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Oakland.
Can I find deals for business class flights from Ontario to Oakland?
Yes. Cheapflights offers flight deals from Ontario to Oakland by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Alternative routes for Ontario to Oakland

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Complete your trip

Oakland, California car rentals

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Fly with Cheapflights

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

When you search for this flight from Ontario to Oakland, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

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

Millions of users choose and trust Cheapflights to book the best flight deals from Ontario to Oakland for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

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

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Cheap flights from Ontario to Oakland, CA from C$ 252

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 25/9. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Ontario to Oakland

Keep the following information in mind while searching for Ontario to Oakland flight deals. Data was last updated 31 July 2025.

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from Ontario to Oakland

Cheapest flights from Ontario to OaklandExplore the most affordable flight options available from Ontario to Oakland. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 31 July 2025.

Explore the most affordable flight options available from Ontario to Oakland. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 31 July 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Ontario to Oakland that are best for you.

Best time to book a flight from Ontario to Oakland

Have a flexible travel schedule? Discover the best time to fly to Oakland from Ontario with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from Ontario to Oakland

Reviews of airlines servicing Oakland

Read reviews from past customers who have flown Alaska Airlines,Delta, andSun Country Air from Ontario to Oakland. 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.

Related info for your journey

Find useful and relevant information for your journey from Ontario to Oakland. 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 into for flights to Oakland from Ontario?

What are the cheapest airlines to fly from Region of Ontario to Oakland, California one-way?

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

Can I find deals for flights from Ontario to Oakland that include hotel bookings?

How can I find direct flights from Ontario to Oakland?

Can I find deals for business class flights from Ontario to Oakland?

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 Ontario to Oakland

See prices for flight routes from nearby airports that may be better suited for you.

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 Ontario to Oakland?

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

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

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

100% Free

Book with Flexibility

Travel Smart

Cheapest flights from Ontario to Oakland
Explore the most affordable flight options available from Ontario to Oakland. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 31 July 2025.