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Cheap flights from Oakland, CA to Ontario from C$ 338

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 13/9. Fares are subject to change and may not be available on all flights or dates of travel.
OAK — YYZ
6 Aug — 13 Aug1
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 7 July 2026.

Wed 9/912:13 p.m.
OAK
-
YYZ
2 stops33h 52m
Multiple Airlines
Wed 16/94:55 p.m.
YYZ
-
OAK
1 stop8h 59m
Multiple Airlines
Deal found 3/7C$ 732
Wed 7/1012:13 p.m.
OAK
-
YYZ
2 stops13h 57m
Multiple Airlines
Wed 14/104:55 p.m.
YYZ
-
OAK
1 stop9h 00m
Multiple Airlines
Deal found 6/7C$ 743
Tue 13/1012:13 p.m.
OAK
-
YYZ
2 stops14h 32m
Multiple Airlines
Tue 20/104:55 p.m.
YYZ
-
OAK
1 stop9h 00m
Multiple Airlines
Deal found 4/7C$ 759
Wed 2/912:13 p.m.
OAK
-
YYZ
1 stop15h 26m
Multiple Airlines
Tue 8/98:00 a.m.
YYZ
-
OAK
2 stops16h 28m
Multiple Airlines
Deal found 6/7C$ 765
Sat 29/812:13 p.m.
OAK
-
YYZ
2 stops14h 32m
Multiple Airlines
Wed 2/94:55 p.m.
YYZ
-
OAK
1 stop8h 59m
Multiple Airlines
Deal found 5/7C$ 768
Wed 26/81:29 p.m.
OAK
-
YYZ
2 stops28h 21m
Multiple Airlines
Wed 2/94:55 p.m.
YYZ
-
OAK
1 stop8h 59m
Multiple Airlines
Deal found 5/7C$ 782
Mon 24/88:37 p.m.
OAK
-
YYZ
1 stop17h 32m
Multiple Airlines
Wed 2/94:55 p.m.
YYZ
-
OAK
1 stop8h 59m
Multiple Airlines
Deal found 5/7C$ 785
Mon 24/88:37 p.m.
OAK
-
YYZ
1 stop17h 32m
Multiple Airlines
Tue 1/94:55 p.m.
YYZ
-
OAK
2 stops24h 38m
Multiple Airlines
Deal found 5/7C$ 787
Tue 25/812:13 p.m.
OAK
-
YYZ
2 stops14h 32m
Multiple Airlines
Wed 2/94:55 p.m.
YYZ
-
OAK
1 stop8h 59m
Multiple Airlines
Deal found 5/7C$ 792
Fri 28/811:15 p.m.
OAK
-
YYZ
1 stop18h 40m
Multiple Airlines
Wed 2/94:55 p.m.
YYZ
-
OAK
1 stop8h 59m
Multiple Airlines
Deal found 5/7C$ 795
Mon 24/812:13 p.m.
OAK
-
YYZ
1 stop15h 26m
Multiple Airlines
Mon 31/85:10 p.m.
YYZ
-
OAK
2 stops24h 23m
Multiple Airlines
Deal found 5/7C$ 796
Fri 11/95:00 p.m.
OAK
-
YUL
2 stops27h 44m
Delta
Tue 15/97:00 a.m.
YUL
-
OAK
2 stops19h 59m
Delta
Deal found 6/7C$ 864

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 7 July 2026.

Round-trip from

C$ 732

One-way from

C$ 338

Popular in

December

Cheapest in

January

Average price

C$ 810
Alaska Airlines
  • Alaska Airlines
  • 9/9-16/9
  • 3 total stops
  • 42h 51m total
  • Oakland to Ontario
Search Deals
13/9
  • 13/9
  • 2 total stops
  • 13h 57m total
  • Oakland to Ontario
Search Deals
High demand for flights, 0% potential price rise
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 23 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 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 7 July 2026.
Use the filters below to find and compare flights from Oakland to Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

OaklandToronto

OAK - YYZ

OAKYYZ

Oakland

Tue 18/8

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

1 stop7h 40m

Toronto Pearson Intl

Sun 23/8

5:50 p.m.-11:56 p.m.

1 stop9h 06m

C$ 851

OaklandMontreal

OAK - YUL

OAKYUL

Oakland

Fri 11/9

5:00 p.m.-11:44 p.m.

2 stops27h 44m

Montreal Pierre Elliott Trudeau Intl

Tue 15/9

7:00 a.m.-11:59 p.m.

2 stops19h 59m

C$ 864

OaklandMontreal

OAK - YUL

OAKYUL

Oakland

Wed 29/7

5:05 p.m.-11:52 p.m.

2 stops27h 47m

Montreal Pierre Elliott Trudeau Intl

Tue 4/8

7:00 a.m.-4:14 p.m.

2 stops36h 14m

C$ 928

OaklandMontreal

OAK - YUL

OAKYUL

Oakland

Sun 2/8

6:00 a.m.-11:39 a.m.

2 stops26h 39m

Montreal Pierre Elliott Trudeau Intl

Tue 4/8

12:47 p.m.-4:14 p.m.

2 stops30h 27m

C$ 931

OaklandMontreal

OAK - YUL

OAKYUL

Oakland

Sun 20/9

6:00 a.m.-11:38 a.m.

2 stops26h 38m

Montreal Pierre Elliott Trudeau Intl

Wed 23/9

7:00 a.m.-11:59 p.m.

2 stops19h 59m

C$ 952

OaklandToronto

OAK - YYZ

OAKYYZ

Oakland

Thu 17/9

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

2 stops14h 59m

Toronto Pearson Intl

Wed 23/9

11:38 a.m.-11:59 p.m.

2 stops15h 21m

C$ 975

OaklandToronto

OAK - YYZ

OAKYYZ

Oakland

Sat 19/9

7:51 p.m.-3:45 p.m.

1 stop16h 54m

Toronto Pearson Intl

Wed 23/9

4:55 p.m.-10:54 p.m.

1 stop8h 59m

C$ 978

OaklandMontreal

OAK - YUL

OAKYUL

Oakland

Fri 11/9

5:00 p.m.-11:44 p.m.

2 stops27h 44m

Montreal Pierre Elliott Trudeau Intl

Mon 14/9

7:00 a.m.-11:59 p.m.

2 stops19h 59m

C$ 982

OaklandMontreal

OAK - YUL

OAKYUL

Oakland

Sun 2/8

6:00 a.m.-11:39 a.m.

2 stops26h 39m

Montreal Pierre Elliott Trudeau Intl

Sat 8/8

7:00 a.m.-10:38 p.m.

2 stops18h 38m

C$ 982

OaklandToronto

OAK - YYZ

OAKYYZ

Oakland

Wed 16/9

6:01 a.m.-3:45 p.m.

1 stop30h 44m

Toronto Pearson Intl

Tue 22/9

4:55 p.m.-12:49 p.m.

2 stops22h 54m

C$ 991

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/7

Showing 1-10 of 60 resultsSorted by cheapest first
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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
No data available for this route at this time. Please check back soon.

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 14h 25m. Delta provides one of the quickest options available for as low as C$ 1,018. 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 - Toronto Island, 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

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Alternative routes for Oakland to Ontario

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

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