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Oakland

$211+ Cheap flights from Ontario to Oakland, CA (OAK)

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 5/2. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — OAK
Apr 26 — May 31
Sun 4/26
Sun 5/3
1 adult, Economy
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Cheap 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 March 27, 2026.

This Delta deal was found by Cheapflights users on 3/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/2812:09 pm
YYZ
-
OAK
2 stops14h 48m
Delta
Wed 6/35:05 pm
OAK
-
YYZ
2 stops14h 14m
Delta
Deal found 3/25$386
This CheapOair deal was found by Cheapflights users on 3/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/14:55 pm
YYZ
-
OAK
1 stop8h 37m
Alaska Airlines
Tue 5/56:20 am
OAK
-
YYZ
1 stop30h 25m
Alaska Airlines
Deal found 3/26$403
This Delta deal was found by Cheapflights users on 3/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/42:20 pm
YYZ
-
OAK
2 stops12h 37m
Delta
Mon 6/85:03 pm
OAK
-
YYZ
2 stops12h 52m
Delta
Deal found 3/23$407
This Delta deal was found by Cheapflights users on 3/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/267:45 am
YYZ
-
OAK
2 stops19h 12m
Delta
Tue 6/25:05 pm
OAK
-
YYZ
2 stops14h 14m
Delta
Deal found 3/25$413
This Alaska Airlines deal was found by Cheapflights users on 3/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/74:55 pm
YYZ
-
OAK
1 stop8h 37m
Alaska Airlines
Mon 5/116:20 am
OAK
-
YYZ
1 stop30h 25m
Alaska Airlines
Deal found 3/25$417
This CheapOair deal was found by Cheapflights users on 3/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/214:55 pm
YYZ
-
OAK
1 stop9h 48m
Alaska Airlines
Mon 4/276:20 am
OAK
-
YYZ
1 stop30h 25m
Alaska Airlines
Deal found 3/22$421
This Delta deal was found by Cheapflights users on 3/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/77:45 am
YYZ
-
OAK
2 stops19h 06m
Delta
Sat 7/256:00 am
OAK
-
YYZ
2 stops14h 14m
Delta
Deal found 3/24$431
This Alaska Airlines deal was found by Cheapflights users on 3/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/204:55 pm
YYZ
-
OAK
1 stop9h 48m
Alaska Airlines
Mon 4/276:20 am
OAK
-
YYZ
1 stop30h 25m
Alaska Airlines
Deal found 3/23$433
This Delta deal was found by Cheapflights users on 3/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/2612:29 pm
YYZ
-
OAK
2 stops14h 28m
Delta
Thu 6/46:00 am
OAK
-
YYZ
2 stops14h 14m
Delta
Deal found 3/25$439
This Delta deal was found by Cheapflights users on 3/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/265:45 pm
YYZ
-
OAK
1 stop9h 12m
Delta
Wed 6/36:00 am
OAK
-
YYZ
2 stops14h 14m
Delta
Deal found 3/25$443
This Delta deal was found by Cheapflights users on 3/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/47:00 am
YUL
-
OAK
2 stops31h 53m
Delta
Sat 5/1612:28 pm
OAK
-
YUL
2 stops31h 45m
Delta
Deal found 3/23$451
This Delta deal was found by Cheapflights users on 3/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/307:00 am
YUL
-
OAK
2 stops19h 54m
Delta
Sat 5/165:55 pm
OAK
-
YUL
2 stops26h 18m
Delta
Deal found 3/23$465

Find flight deals from Ontario to Oakland

Keep the following information in mind while searching for Ontario to Oakland flight deals. Data was last updated March 27, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$386
(Delta)

One-way from

$211
(CheapOair)

Popular in

December

Cheapest in

April

Average price

$409
Provider with most accurate pricing for Toronto (YTO)-San Francisco flight deals.
Search Deals
Provider most trusted by Cheapflights users for Toronto (YTO)-San Francisco flights.
Search Deals
From Ontario to Oakland
Search Deals
One-way flight from Ontario to Oakland
Search Deals
Highest demand for flights based on searches. 3% potential increase in price ($13 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($7 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to Oakland 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 2,558,603 searches. Data last updated March 27, 2026.
Use the filters below to find and compare flights from Ontario to Oakland that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

TorontoOakland

YYZ - OAK

YYZOAK

Toronto Pearson Intl

Wed 5/27

6:10 am-4:25 pm

2 stops13h 15m

Oakland

Tue 6/2

6:00 am-4:35 pm

1 stop7h 35m

$386

TorontoOakland

YYZ - OAK

YYZOAK

Toronto Pearson Intl

Thu 6/4

5:45 pm-11:57 pm

1 stop9h 12m

Oakland

Mon 6/8

5:03 pm-8:55 am

2 stops12h 52m

$407

TorontoOakland

YYZ - OAK

YYZOAK

Toronto Pearson Intl

Thu 5/28

2:20 pm-11:57 pm

2 stops12h 37m

Oakland

Thu 6/4

6:00 am-11:14 pm

2 stops14h 14m

$413

MontrealOakland

YUL - OAK

YULOAK

Montreal Pierre Elliott Trudeau Intl

Fri 5/8

6:00 am-11:57 pm

2 stops20h 57m

Oakland

Tue 5/12

12:28 pm-11:57 pm

2 stops32h 29m

$523

TorontoOakland

YYZ - OAK

YYZOAK

Toronto Pearson Intl

Mon 5/4

4:55 pm-10:32 pm

1 stop8h 37m

Oakland

Tue 5/5

10:57 am-3:45 pm

2 stops25h 48m

$544

MontrealOakland

YUL - OAK

YULOAK

Montreal Pierre Elliott Trudeau Intl

Wed 7/15

6:00 am-11:51 pm

2 stops20h 51m

Oakland

Mon 8/10

5:05 pm-11:56 pm

2 stops27h 51m

$557
Quickest round-trip

TorontoOakland

YYZ - OAK

YYZOAK

Toronto Pearson Intl

Tue 5/26

5:45 pm-11:57 pm

1 stop9h 12m

Oakland

Wed 6/3

6:00 am-4:35 pm

1 stop7h 35m

$569

MontrealOakland

YUL - OAK

YULOAK

Montreal Pierre Elliott Trudeau Intl

Tue 7/21

6:00 am-11:51 pm

2 stops20h 51m

Oakland

Thu 8/6

5:03 pm-11:40 pm

2 stops27h 37m

$576

MontrealOakland

YUL - OAK

YULOAK

Montreal Pierre Elliott Trudeau Intl

Tue 7/21

6:00 am-11:51 pm

2 stops20h 51m

Oakland

Wed 8/5

12:30 pm-11:55 pm

2 stops32h 25m

$583

MontrealOakland

YUL - OAK

YULOAK

Montreal Pierre Elliott Trudeau Intl

Wed 4/29

6:00 am-11:54 pm

2 stops20h 54m

Oakland

Fri 5/15

5:05 pm-11:13 pm

2 stops27h 08m

$588

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/22

Showing 1-10 of 48 resultsSorted by cheapest first
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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

What is the cheapest month to book a flight from Region of Ontario to Oakland, California?

Currently, August is the cheapest month in which you can book a flight from Region of Ontario to Oakland, California (average of $159). Flying from Region of Ontario to Oakland, California in December is currently the most expensive (average of $253). 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.

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?

    Most people fly into Oakland (OAK) if they book a flight to Oakland from Ontario. Oakland is conveniently located just 7.0 mi from Oakland’s city center.

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

    Delta can get you from Region of Ontario to Oakland, California in just under 13h 15m. Your travel time can differ by up to . The distance from Region of Ontario to Oakland, California is about 2243 mi.

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

    While some choose either Montreal Pierre Elliott Trudeau Intl - Oakland or Hamilton - Oakland, Toronto Pearson Intl - Oakland is the most popular route from Region of Ontario to Oakland, California.

  • 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.

  • What is the cheapest month to book a flight from Region of Ontario to Oakland, California?

    Currently, August is the cheapest month in which you can book a flight from Region of Ontario to Oakland, California (average of $159). Flying from Region of Ontario to Oakland, California in December is currently the most expensive (average of $253). 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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