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Cheap flights from Oakland, CA to Ontario from C$ 253

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 28/7. Fares are subject to change and may not be available on all flights or dates of travel.
OAK — YYZ
17 Jun — 24 Jun1
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 18 May 2026.

Tue 30/66:22 a.m.
OAK
-
YYZ
2 stops13h 23m
Multiple Airlines
Tue 7/710:05 a.m.
YYZ
-
OAK
1 stop15h 25m
Multiple Airlines
Deal found 14/5C$ 757
Wed 16/95:55 a.m.
OAK
-
YYZ
1 stop7h 50m
Delta
Tue 22/95:50 p.m.
YYZ
-
OAK
1 stop8h 59m
Delta
Deal found 14/5C$ 771
Tue 7/76:00 a.m.
OAK
-
YYZ
1 stop7h 35m
Delta
Fri 10/75:45 p.m.
YYZ
-
OAK
1 stop9h 05m
Delta
Deal found 14/5C$ 773
Mon 24/86:00 a.m.
OAK
-
YYZ
2 stops8h 24m
Delta
Tue 1/95:50 p.m.
YYZ
-
OAK
1 stop8h 59m
Delta
Deal found 15/5C$ 785
Sat 20/66:00 a.m.
OAK
-
YYZ
2 stops14h 14m
Delta
Wed 24/66:30 a.m.
YYZ
-
OAK
2 stops12h 53m
Delta
Deal found 17/5C$ 792
Mon 24/84:57 p.m.
OAK
-
YYZ
2 stops16h 26m
Delta
Wed 2/912:30 p.m.
YYZ
-
OAK
2 stops14h 19m
Delta
Deal found 15/5C$ 793
Sat 4/77:52 a.m.
OAK
-
YYZ
2 stops14h 13m
Multiple Airlines
Tue 7/710:05 a.m.
YYZ
-
OAK
1 stop15h 25m
Multiple Airlines
Deal found 14/5C$ 801
Wed 1/76:22 a.m.
OAK
-
YYZ
2 stops11h 53m
Multiple Airlines
Tue 7/710:05 a.m.
YYZ
-
OAK
1 stop15h 25m
Multiple Airlines
Deal found 14/5C$ 808
Mon 29/68:22 p.m.
OAK
-
YYZ
1 stop21h 33m
Multiple Airlines
Tue 7/712:00 p.m.
YYZ
-
OAK
2 stops24h 26m
Multiple Airlines
Deal found 13/5C$ 810
Wed 26/86:00 a.m.
OAK
-
YYZ
1 stop7h 35m
Delta
Tue 1/95:50 p.m.
YYZ
-
OAK
1 stop8h 59m
Delta
Deal found 15/5C$ 823
Tue 25/812:33 p.m.
OAK
-
YUL
2 stops26h 09m
Delta
Wed 2/97:00 a.m.
YUL
-
OAK
2 stops19h 49m
Delta
Deal found 16/5C$ 883
Tue 25/812:33 p.m.
OAK
-
YUL
2 stops32h 26m
Delta
Fri 28/87:00 a.m.
YUL
-
OAK
2 stops36h 14m
Delta
Deal found 16/5C$ 898

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 18 May 2026.

Round-trip from

C$ 757

One-way from

C$ 253

Popular in

December

Cheapest in

January

Average price

C$ 709
30/6-7/7
  • 30/6-7/7
  • 3 total stops
  • 28h 48m total
  • Oakland to Ontario
Search Deals
28/7
  • 28/7
  • 2 total stops
  • 14h 13m total
  • Oakland to Ontario
Search Deals
Highest demand for flights based on searches. 3% potential increase in price (C$ 36 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 27 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in May 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 18 May 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

Mon 29/6

6:00 a.m.-4:35 p.m.

1 stop7h 35m

Toronto Pearson Intl

Mon 13/7

12:09 p.m.-11:50 p.m.

2 stops14h 41m

C$ 837

OaklandToronto

OAK - YYZ

OAKYYZ

Oakland

Mon 29/6

5:03 p.m.-11:19 a.m.

2 stops15h 16m

Toronto Pearson Intl

Sat 11/7

6:10 a.m.-4:21 p.m.

2 stops13h 11m

C$ 844

OaklandMontreal

OAK - YUL

OAKYUL

Oakland

Tue 25/8

4:57 p.m.-11:59 p.m.

2 stops28h 02m

Montreal Pierre Elliott Trudeau Intl

Mon 31/8

6:15 p.m.-11:49 p.m.

2 stops32h 34m

C$ 883

OaklandMontreal

OAK - YUL

OAKYUL

Oakland

Tue 25/8

12:33 p.m.-5:42 p.m.

2 stops26h 09m

Montreal Pierre Elliott Trudeau Intl

Wed 2/9

7:00 a.m.-11:49 p.m.

2 stops19h 49m

C$ 883

OaklandMontreal

OAK - YUL

OAKYUL

Oakland

Thu 27/8

4:57 p.m.-11:40 p.m.

2 stops27h 43m

Montreal Pierre Elliott Trudeau Intl

Mon 31/8

6:15 p.m.-11:49 p.m.

2 stops32h 34m

C$ 898

OaklandMontreal

OAK - YUL

OAKYUL

Oakland

Wed 26/8

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

2 stops14h 59m

Montreal Pierre Elliott Trudeau Intl

Fri 28/8

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

2 stops36h 14m

C$ 898

OaklandMontreal

OAK - YUL

OAKYUL

Oakland

Sat 29/8

4:57 p.m.-11:40 p.m.

2 stops27h 43m

Montreal Pierre Elliott Trudeau Intl

Wed 2/9

7:00 a.m.-11:49 p.m.

2 stops19h 49m

C$ 898

OaklandToronto

OAK - YYZ

OAKYYZ

Oakland

Wed 17/6

6:00 a.m.-11:58 p.m.

2 stops14h 58m

Toronto Pearson Intl

Wed 1/7

5:45 p.m.-11:54 p.m.

1 stop9h 09m

C$ 933

OaklandToronto

OAK - YYZ

OAKYYZ

Oakland

Mon 6/7

5:03 p.m.-8:55 a.m.

2 stops12h 52m

Toronto Pearson Intl

Sat 18/7

6:10 a.m.-4:21 p.m.

2 stops13h 11m

C$ 947

OaklandMontreal

OAK - YUL

OAKYUL

Oakland

Tue 23/6

6:00 a.m.-11:55 p.m.

2 stops14h 55m

Montreal Pierre Elliott Trudeau Intl

Fri 26/6

7:00 a.m.-11:54 p.m.

2 stops19h 54m

C$ 975

Flights are sorted by cheapest round-trip flights first.

Deals found on 13/5

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 7h 35m. Delta provides one of the quickest options available for as low as C$ 837. The distance between Oakland, California and Region of Ontario is about 3610 km.

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

    While some choose either Oakland - Toronto Island or Oakland - Montreal Pierre Elliott Trudeau Intl, 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

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