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Cheap flights from Oakland, California to Ontario from $140

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Oakland, California to Ontario departing on 9/25. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Oakland, California to Ontario

Cheap round-trip flights

Logo
6:00 am - 7:45 pmOAK-YYZ
10h 45m1 stop
Logo
9:45 am - 11:32 pmYYZ-OAK
16h 47m1 stop
$267
Find Deal
Thu, Sep 4 - Wed, Sep 10
Logo
8:33 am - 7:45 pmOAK-YYZ
8h 12m1 stop
Logo
11:00 am - 11:32 pmYYZ-OAK
15h 32m2 stops
$307
Find Deal
Thu, Sep 4 - Wed, Sep 10
Logo
8:33 am - 7:45 pmOAK-YYZ
8h 12m1 stop
Logo
9:30 am - 11:32 pmYYZ-OAK
17h 02m1 stop
$309
Find Deal
Wed, Sep 17 - Mon, Sep 22
Logo
6:00 am - 7:45 pmOAK-YYZ
10h 45m1 stop
Logo
10:00 am - 7:38 amYYZ-OAK
24h 38m3 stops
$312
Find Deal
Wed, Sep 17 - Mon, Sep 22
Alaska Airlines Logo
6:15 am - 3:00 pmOAK-YYZ
29h 45m1 stop
Alaska Airlines Logo
4:45 pm - 12:03 amYYZ-OAK
10h 18m1 stop
$425Alaska Airlines
Find Deal
Tue, Sep 23 - Sat, Oct 4
Alaska Airlines Logo
11:01 am - 3:00 pmOAK-YYZ
24h 59m1 stop
Alaska Airlines Logo
4:45 pm - 12:03 amYYZ-OAK
10h 18m1 stop
$426Alaska Airlines
Find Deal
Tue, Sep 30 - Sat, Oct 4
Alaska Airlines Logo
6:15 am - 3:00 pmOAK-YYZ
29h 45m1 stop
Alaska Airlines Logo
4:45 pm - 8:59 amYYZ-OAK
19h 14m2 stops
$430Alaska Airlines
Find Deal
Tue, Sep 23 - Tue, Sep 30
Delta Logo
5:05 pm - 11:56 pmOAK-YUL
27h 51m2 stops
Delta Logo
7:00 am - 10:48 pmYUL-OAK
18h 48m2 stops
$568Delta
Find Deal
Wed, Sep 17 - Sat, Sep 20
Delta Logo
5:05 pm - 11:56 pmOAK-YUL
27h 51m2 stops
Delta Logo
7:00 am - 10:48 pmYUL-OAK
18h 48m2 stops
$631Delta
Find Deal
Tue, Sep 16 - Sat, Sep 20
Delta Logo
12:37 pm - 11:56 pmOAK-YUL
32h 19m2 stops
Delta Logo
7:00 am - 11:50 pmYUL-OAK
19h 50m2 stops
$655Delta
Find Deal
Tue, Sep 16 - Sun, Sep 21

Sun Country Air flights from Oakland, California to Region of Ontario

Our best Sun Country Air deals on Oakland, California to Region of Ontario flight tickets
Sun Country Air
Aug 7
OAK5:27 pmOakland
15h 23m
1 stop
YYZ11:50 amToronto Pearson Intl
Aug 14
YYZ11:40 amToronto Pearson Intl
7h 47m
1 stop
OAK4:27 pmOakland
$358
Find similar
Sun Country Air
Aug 7
OAK5:27 pmOakland
15h 23m
1 stop
YYZ11:50 amToronto Pearson Intl
Aug 14
YYZ11:40 amToronto Pearson Intl
7h 47m
1 stop
OAK4:27 pmOakland
$402
Find similar
Sun Country Air
Aug 7
OAK5:27 pmOakland
15h 23m
1 stop
YYZ11:50 amToronto Pearson Intl
Aug 17
YYZ11:40 amToronto Pearson Intl
7h 59m
1 stop
OAK4:39 pmOakland
$478
Find similar

Delta flights from Oakland, California to Region of Ontario

Our best Delta deals on Oakland, California to Region of Ontario flight tickets
Delta
Sep 17
OAK5:05 pmOakland
27h 51m
2 stops
YUL11:56 pmMontreal Pierre Elliott Trudeau Intl
Sep 20
YUL7:00 amMontreal Pierre Elliott Trudeau Intl
18h 48m
2 stops
OAK10:48 pmOakland
$568
Find similar
Delta
Sep 16
OAK5:05 pmOakland
27h 51m
2 stops
YUL11:56 pmMontreal Pierre Elliott Trudeau Intl
Sep 20
YUL7:00 amMontreal Pierre Elliott Trudeau Intl
18h 48m
2 stops
OAK10:48 pmOakland
$631
Find similar
Delta
Aug 14
OAK6:00 amOakland
7h 38m
1 stop
YYZ4:38 pmToronto Pearson Intl
Aug 20
YYZ5:43 pmToronto Pearson Intl
9h 07m
1 stop
OAK11:50 pmOakland
$654
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Oakland, California to Region of 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, momondo users made 832,500 searches. Data last updated July 31, 2025.
Use the filters below to find and compare flights from Oakland, California to Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

OaklandToronto

OAK - YYZ

OAKYYZ

Oakland

Thu 9/4

6:00 am-7:45 pm

1 stop10h 45m

Toronto Pearson Intl

Wed 9/10

9:45 am-11:32 pm

1 stop16h 47m

$267

OaklandToronto

OAK - YYZ

OAKYYZ

Oakland

Thu 9/4

8:33 am-7:45 pm

1 stop8h 12m

Toronto Pearson Intl

Wed 9/10

11:00 am-11:32 pm

2 stops15h 32m

$307

OaklandToronto

OAK - YYZ

OAKYYZ

Oakland

Wed 9/17

8:33 am-7:45 pm

1 stop8h 12m

Toronto Pearson Intl

Mon 9/22

9:30 am-11:32 pm

1 stop17h 02m

$309

OaklandToronto

OAK - YYZ

OAKYYZ

Oakland

Wed 9/17

6:00 am-7:45 pm

1 stop10h 45m

Toronto Pearson Intl

Mon 9/22

10:00 am-7:38 am

3 stops24h 38m

$312

OaklandToronto

OAK - YYZ

OAKYYZ

Oakland

Tue 9/23

6:15 am-3:00 pm

1 stop29h 45m

Toronto Pearson Intl

Sat 10/4

4:45 pm-12:03 am

1 stop10h 18m

$425

OaklandToronto

OAK - YYZ

OAKYYZ

Oakland

Tue 9/30

11:01 am-3:00 pm

1 stop24h 59m

Toronto Pearson Intl

Sat 10/4

4:45 pm-12:03 am

1 stop10h 18m

$426

OaklandToronto

OAK - YYZ

OAKYYZ

Oakland

Tue 9/23

6:15 am-3:00 pm

1 stop29h 45m

Toronto Pearson Intl

Tue 9/30

4:45 pm-8:59 am

2 stops19h 14m

$430

OaklandMontreal

OAK - YUL

OAKYUL

Oakland

Wed 9/17

5:05 pm-11:56 pm

2 stops27h 51m

Montreal Pierre Elliott Trudeau Intl

Sat 9/20

7:00 am-10:48 pm

2 stops18h 48m

$568

OaklandMontreal

OAK - YUL

OAKYUL

Oakland

Tue 9/16

5:05 pm-11:56 pm

2 stops27h 51m

Montreal Pierre Elliott Trudeau Intl

Sat 9/20

7:00 am-10:48 pm

2 stops18h 48m

$631

OaklandMontreal

OAK - YUL

OAKYUL

Oakland

Tue 9/16

12:37 pm-11:56 pm

2 stops32h 19m

Montreal Pierre Elliott Trudeau Intl

Sun 9/21

7:00 am-11:50 pm

2 stops19h 50m

$655

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Ontario from

How to get the cheapest flight ticket from Oakland, California to Region of Ontario

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest day to depart on your flight to Region of Ontario?

According to our data, Wednesday is the cheapest day to fly to Region of Ontario from Oakland, California. The lowest ticket price found for a Wednesday departure recently was $340. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. Flights from Oakland, California to Region of Ontario on a Monday will generally be more expensive and average around $836. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Region of Ontario?

According to our data, the cheapest time of day to fly to Region of Ontario is in the afternoon. momondo users have found flights departing from Oakland, California to Region of Ontario in the afternoon for as low as $340. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights at noon are often more expensive with an average ticket price of $537.

Cheap Oakland, California to Region of Ontario flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Oakland, California to Region of Ontario

Best Price Found

$140

Fastest flight time

7h 38m

Direct flights

None

Airports in Region of Ontario

4 airports
The best one-way flight to Region of Ontario from Oakland, California in the past 72 hours is $140. The best round-trip flight deal from Oakland, California to Region of Ontario found on momondo in the last 72 hours is $267.
The fastest flight from Oakland, California to Region of Ontario takes 7h 38m
There are no direct flights from Oakland, California to Region of Ontario. Popular non-direct routes for this connection are Oakland Airport - Toronto Pearson Intl Airport, Oakland Airport - Hamilton Airport and Oakland Airport - Toronto Island Airport.
There are 4 airports near Region of Ontario: Montreal Pierre Elliott Trudeau Intl (YUL), Toronto Pearson Intl (YYZ), Toronto Island (YTZ), Hamilton (YHM)
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  • When did momondo last update prices for flights from Oakland Airport to Ontario?

    Prices for flights from Oakland Airport to Ontario refresh daily.

  • How old do you have to be to fly from Oakland Airport to Ontario?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Oakland Airport to Ontario.

  • What documentation or ID do you need to fly to Ontario?

    The necessary travel and health documents for your Ontario trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Why use momondo?

Why should I use momondo to find a flight deal from Oakland to Ontario?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Oakland to Ontario. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from Oakland to Ontario with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Oakland to Ontario flights to just show those with flexible booking policies.

How can momondo help me find flights from Oakland to Ontario?

Once all potential Oakland to Ontario flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from Oakland to Ontario right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Ontario from Oakland. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

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