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 7h 44m. Delta provides one of the quickest options available for as low as C$ 864. The distance between Oakland, California and Region of Ontario is about 3610 km. This flight may include one or multiple stops.

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.

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).

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.

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

When flying from Oakland, California to Region of Ontario, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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.

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.

C$ 297+ Cheap Flights from Oakland, CA to Ontario

Cheap flight deals from Oakland to Ontario

Enter your travel dates to find the best prices.

Cheapest

Best

Last-minute

One-way

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 23 August 2026.

Mon 28/96:51 p.m. -

1 stop8h 48m

Wed 30/912:00 p.m. -

2 stops13h 54m

Deal found 19/8C$ 647

Wed 9/912:47 p.m. -

2 stops33h 18m

Sun 13/98:35 p.m. -

1 stop15h 47m

Deal found 18/8C$ 665

Sat 3/1012:47 p.m. -

1 stop8h 12m

Tue 6/1010:50 a.m. -

2 stops28h 01m

Deal found 20/8C$ 676

Sun 20/910:17 a.m. -

1 stop17h 22m

Sun 27/99:00 a.m. -

2 stops27h 22m

Deal found 23/8C$ 714

Thu 10/910:17 a.m. -

2 stops11h 48m

Sun 13/98:35 p.m. -

1 stop15h 47m

Deal found 20/8C$ 724

Tue 6/1012:47 p.m. -

1 stop28h 22m

Tue 13/1010:50 a.m. -

2 stops28h 02m

Deal found 21/8C$ 734

Wed 23/912:47 p.m. -

2 stops13h 23m

Mon 28/98:35 p.m. -

1 stop18h 16m

Deal found 20/8C$ 740

Fri 25/910:17 a.m. -

2 stops15h 53m

Mon 28/98:35 p.m. -

1 stop18h 16m

Deal found 20/8C$ 757

Tue 29/912:47 p.m. -

2 stops15h 08m

Thu 1/104:55 p.m. -

1 stop8h 59m

Deal found 19/8C$ 780

Sat 19/911:30 p.m. -

1 stop29h 00m

Sat 26/97:15 a.m. -

2 stops15h 37m

Deal found 20/8C$ 991

Mon 19/1011:30 p.m. -

1 stop29h 00m

Fri 23/107:15 a.m. -

2 stops14h 15m

Deal found 20/8C$ 1,008

Sun 20/911:30 p.m. -

1 stop29h 00m

Sat 3/107:15 a.m. -

2 stops19h 27m

Deal found 23/8C$ 1,010

Best flights from Oakland to Ontario
Discover carefully curated flight deals from Oakland to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 23 August 2026.

Fri 16/105:02 p.m. -

2 stops15h 57m

Tue 20/102:26 p.m. -

2 stops12h 30m

Deal found 18/8C$ 885

Fri 23/107:53 p.m. -

1 stop16h 52m

Thu 29/105:15 p.m. -

1 stop8h 40m

Deal found 19/8C$ 906

Sun 20/911:30 p.m. -

1 stop29h 00m

Sat 3/107:15 a.m. -

2 stops19h 27m

Deal found 23/8C$ 1,010

Fri 16/107:02 a.m. -

1 stop29h 43m

Wed 21/104:55 p.m. -

2 stops19h 24m

Deal found 18/8C$ 929

Fri 25/96:00 a.m. -

2 stops14h 59m

Tue 29/94:05 p.m. -

2 stops10h 54m

Deal found 19/8C$ 979

Fri 9/107:53 p.m. -

1 stop16h 52m

Wed 14/104:55 p.m. -

1 stop9h 00m

Deal found 22/8C$ 957

Tue 29/911:30 p.m. -

1 stop29h 00m

Tue 6/107:15 a.m. -

2 stops18h 40m

Deal found 18/8C$ 1,086

Fri 12/27:13 p.m. -

2 stops17h 52m

Mon 22/25:15 p.m. -

2 stops29h 04m

Deal found 19/8C$ 965

Thu 24/97:51 p.m. -

2 stops15h 34m

Wed 30/910:10 a.m. -

2 stops14h 18m

Deal found 20/8C$ 1,129

Fri 16/107:53 p.m. -

2 stops12h 06m

Sat 24/1011:39 a.m. -

2 stops10h 58m

Deal found 23/8C$ 988

Mon 7/96:00 a.m. -

2 stops28h 36m

Fri 11/912:48 p.m. -

2 stops26h 11m

Deal found 19/8C$ 1,207

Thu 1/1011:30 p.m. -

1 stop29h 00m

Mon 5/105:00 p.m. -

2 stops21h 51m

Deal found 22/8C$ 1,167

Thu 18/27:00 a.m. -

1 stop30h 05m

Sun 21/25:15 p.m. -

1 stop25h 29m

Deal found 21/8C$ 1,014

Sun 27/97:51 p.m. -

2 stops15h 34m

Tue 29/910:10 a.m. -

2 stops14h 18m

Deal found 18/8C$ 1,207

Wed 30/96:00 a.m. -

2 stops14h 50m

Wed 7/1012:50 p.m. -

2 stops14h 06m

Deal found 18/8C$ 1,345

Mon 28/97:51 p.m. -

2 stops12h 08m

Wed 30/93:13 p.m. -

2 stops21h 14m

Deal found 19/8C$ 1,017

Wed 2/912:33 p.m. -

2 stops22h 08m

Sun 6/97:00 a.m. -

2 stops18h 38m

Deal found 19/8C$ 1,346

Wed 30/911:30 p.m. -

1 stop29h 00m

Wed 7/108:00 p.m. -

2 stops29h 55m

Deal found 18/8C$ 1,233

Mon 12/107:53 p.m. -

1 stop16h 52m

Mon 19/104:55 p.m. -

1 stop21h 30m

Deal found 20/8C$ 1,030

Wed 14/105:02 p.m. -

2 stops27h 52m

Sun 18/107:00 a.m. -

2 stops19h 56m

Deal found 23/8C$ 1,367

Fri 16/107:53 p.m. -

2 stops15h 32m

Sat 24/1010:10 a.m. -

2 stops16h 32m

Deal found 23/8C$ 1,248

Thu 26/1112:04 p.m. -

2 stops25h 01m

Tue 1/125:15 p.m. -

2 stops24h 29m

Deal found 21/8C$ 1,052

Mon 21/97:51 p.m. -

2 stops13h 44m

Tue 22/94:55 p.m. -

2 stops31h 56m

Deal found 18/8C$ 1,065

Tue 29/911:15 p.m. -

3 stops29h 15m

Sat 3/107:05 a.m. -

2 stops17h 39m

Deal found 18/8C$ 1,320

Sat 24/108:22 p.m. -

2 stops24h 23m

Wed 28/102:30 p.m. -

2 stops24h 30m

Deal found 22/8C$ 1,381

Sat 3/1012:22 p.m. -

2 stops14h 13m

Sat 10/101:20 p.m. -

2 stops12h 35m

Deal found 19/8C$ 1,879

Sat 5/97:51 p.m. -

2 stops19h 09m

Mon 7/910:10 a.m. -

2 stops16h 00m

Deal found 22/8C$ 2,037

Fri 4/910:07 a.m. -

2 stops18h 03m

Mon 7/97:25 a.m. -

2 stops18h 29m

Deal found 19/8C$ 2,135

Sun 4/1011:30 p.m. -

3 stops17h 41m

Sun 11/107:55 p.m. -

3 stops28h 30m

Deal found 20/8C$ 2,332

Thu 3/92:11 p.m. -

2 stops13h 59m

Sun 6/97:25 a.m. -

2 stops14h 30m

Deal found 19/8C$ 2,369

Find flight deals from Oakland to Ontario

Round-trip from	C$ 647
One-way from	C$ 297
Popular in	December
Cheapest in	January
Average price	C$ 824

28/9-30/9
3 total stops
22h 42m total
Oakland to Ontario

Search Deals

27/10
3 total stops
38h 12m total
Oakland to Ontario

Search Deals

High demand for flights, 2% potential price rise

Search Deals

Cheapest flight prices on average. 2% potential price decrease (C$ 20 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in August 2026

Search Deals

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OaklandToronto

OAK Oakland - YYZ Toronto Pearson Intl

OAKYYZ

Oakland

Fri 16/10

5:02 p.m.-11:59 a.m.

2 stops15h 57m

Toronto Pearson Intl

Tue 20/10

2:26 p.m.-11:56 p.m.

2 stops12h 30m

C$ 885

OaklandToronto

OAK Oakland - YYZ Toronto Pearson Intl

OAKYYZ

Oakland

Fri 23/10

7:53 p.m.-3:45 p.m.

1 stop16h 52m

Toronto Pearson Intl

Thu 29/10

5:15 p.m.-10:55 p.m.

1 stop8h 40m

C$ 906

OaklandToronto

OAK Oakland - YYZ Toronto Pearson Intl

OAKYYZ

Oakland

Fri 16/10

7:02 a.m.-3:45 p.m.

1 stop29h 43m

Toronto Pearson Intl

Wed 21/10

4:55 p.m.-9:19 a.m.

2 stops19h 24m

C$ 929

OaklandToronto

OAK Oakland - YYZ Toronto Pearson Intl

OAKYYZ

Oakland

Fri 9/10

7:53 p.m.-3:45 p.m.

1 stop16h 52m

Toronto Pearson Intl

Wed 14/10

4:55 p.m.-10:55 p.m.

1 stop9h 00m

C$ 957

OaklandToronto

OAK Oakland - YYZ Toronto Pearson Intl

OAKYYZ

Oakland

Fri 12/2

7:13 p.m.-4:05 p.m.

2 stops17h 52m

Toronto Pearson Intl

Mon 22/2

5:15 p.m.-7:19 p.m.

2 stops29h 04m

C$ 965

OaklandToronto

OAK Oakland - YYZ Toronto Pearson Intl

OAKYYZ

Oakland

Fri 25/9

6:00 a.m.-11:59 p.m.

2 stops14h 59m

Toronto Pearson Intl

Tue 29/9

4:05 p.m.-11:59 p.m.

2 stops10h 54m

C$ 979

Quickest round-trip

OaklandToronto

OAK Oakland - YYZ Toronto Pearson Intl

OAKYYZ

Oakland

Fri 16/10

7:53 p.m.-10:59 a.m.

2 stops12h 06m

Toronto Pearson Intl

Sat 24/10

11:39 a.m.-7:37 p.m.

2 stops10h 58m

C$ 988

OaklandMontreal

OAK Oakland - YUL Montreal Pierre Elliott Trudeau Intl

OAKYUL

Oakland

Sun 20/9

11:30 p.m.-7:30 a.m.

1 stop29h 00m

Montreal Pierre Elliott Trudeau Intl

Sat 3/10

7:15 a.m.-11:42 p.m.

2 stops19h 27m

C$ 1,010

OaklandToronto

OAK Oakland - YYZ Toronto Pearson Intl

OAKYYZ

Oakland

Thu 18/2

7:00 a.m.-4:05 p.m.

1 stop30h 05m

Toronto Pearson Intl

Sun 21/2

5:15 p.m.-3:44 p.m.

1 stop25h 29m

C$ 1,014

OaklandToronto

OAK Oakland - YYZ Toronto Pearson Intl

OAKYYZ

Oakland

Mon 28/9

7:51 p.m.-10:59 a.m.

2 stops12h 08m

Toronto Pearson Intl

Wed 30/9

3:13 p.m.-9:27 a.m.

2 stops21h 14m

C$ 1,017

Flights are sorted by cheapest round-trip flights first.

Deals found on 18/8

Showing 1-10 of 60 resultsSorted by cheapest first

...

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.

OAK-YYZ

OAK-YTZ

OAK-YUL

OAK-YHM

OAK-YOW

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

OAK-CAON

OAK-YYZ

OAK-YTZ

OAK-YUL

OAK-YHM

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

Related info for your journey

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 7h 44m. Delta provides one of the quickest options available for as low as C$ 864. 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 - 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.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Oakland to Ontario

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Cheap flights from Oakland, CA to Ontario from C$ 297

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 27/10. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Oakland to Ontario

Cheapest flights from Oakland to OntarioExplore 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 23 August 2026.

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 23 August 2026.

Best flights from Oakland to OntarioDiscover carefully curated flight deals from Oakland to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 23 August 2026.

Discover carefully curated flight deals from Oakland to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 23 August 2026.

Last-minute flights from Oakland to OntarioDiscover last-minute flight deals from Oakland to Ontario. Data last updated 23 August 2026 and is based on user searches.

Discover last-minute flight deals from Oakland to Ontario. Data last updated 23 August 2026 and is based on user searches.

One-way flights from Oakland to OntarioSearch for one-way flight options from Oakland to Ontario. Find affordable one-way fares based on user searches. Data last updated 23 August 2026.

Search for one-way flight options from Oakland to Ontario. Find affordable one-way fares based on user searches. Data last updated 23 August 2026.

Find flight deals from Oakland to Ontario

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Best time to book a flight from Oakland to Ontario

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Related info for your journey

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

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

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

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

How can I find direct flights from Oakland to Ontario?

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

Browse thousands of different options on Cheapflights for your next trip

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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.

Complete your trip

Complete your trip to Ontario by adding a car rental and/or hotel reservation to your travel itinerary.

Direct flights to Canada

Book a non-stop flight to one of these other cities located in Canada.

Search flights from Oakland to Ontario by cabin class

Find flights from Oakland to Ontario, based on your preferred cabin class, be it economy, premium economy, business, or first class.

Oakland and Ontario flights

Browse other Oakland and Ontario flight options. Last updated on 23 August 2026.

Popular flight searches

Check out other popular destinations found by fellow travellers in 2026

Oakland to Ontario flights

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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 23 August 2026.

Best flights from Oakland to Ontario
Discover carefully curated flight deals from Oakland to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 23 August 2026.

Last-minute flights from Oakland to Ontario
Discover last-minute flight deals from Oakland to Ontario. Data last updated 23 August 2026 and is based on user searches.

One-way flights from Oakland to Ontario
Search for one-way flight options from Oakland to Ontario. Find affordable one-way fares based on user searches. Data last updated 23 August 2026.