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$126+ Cheap flights from Ontario

This is the cheapest return flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/11. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
ONT — AKL
17 Nov — 24 Nov1
1 adult
1 adult, Economy

What to know about flights from Ontario

Discover essential information about flights departing from Ontario, including flight schedules, destinations, airlines operating at the Ontario airport, and any specific guidelines or requirements for travellers. Please note that the information is based on the most recent updates available. Data last updated 18 October 2025.

Cheapest one-way flight

$59

Cheapest airline

Spirit Airlines

Most popular destination

Auckland Intl (AKL)
The cheapest one-way flight from Ontario is currently to Las Vegas Harry Reid Intl.
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On average, Spirit Airlines currently has the cheapest one-way flight from Ontario (avg. price of $115).
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Auckland Intl (AKL) is currently the most popular flight destination from Ontario (average return price of $1,890).
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Enter your travel dates to find the best prices.

Cheapest flights from Ontario
Explore the most affordable flight options available from Ontario. Find the lowest fares based on data from user searches, with prices last updated on 18 October 2025.

Wed 12/1116:49ONT - PDX
1 stop7h 09mDelta
Wed 19/1119:22PDX - ONT
1 stop4h 30mDelta
Deal found 16/10$274
Sun 7/1207:10ONT - PDX
Nonstop2h 31mAlaska Airlines
Sat 13/1210:30PDX - ONT
Nonstop2h 16mAlaska Airlines
Deal found 17/10$292
Sat 15/1107:20ONT - PDX
Nonstop2h 30mAlaska Airlines
Mon 17/1117:30PDX - ONT
1 stop6h 02mAlaska Airlines
Deal found 15/10$300
Sat 6/1206:00ONT - PDX
1 stop7h 50mAlaska Airlines
Tue 9/1213:34PDX - ONT
1 stop4h 59mAlaska Airlines
Deal found 17/10$307
Thu 13/1118:03ONT - PDX
Nonstop2h 26mAlaska Airlines
Mon 17/1107:37PDX - ONT
Nonstop2h 21mAlaska Airlines
Deal found 16/10$309
Sat 15/1107:20ONT - PDX
Nonstop2h 30mAlaska Airlines
Sat 15/1113:38PDX - ONT
1 stop7h 15mAlaska Airlines
Deal found 17/10$316
Thu 13/1118:11ONT - PDX
1 stop12h 06mAlaska Airlines
Sat 15/1121:32PDX - ONT
Nonstop2h 24mAlaska Airlines
Deal found 17/10$318
Tue 3/306:00ONT - PDX
1 stop4h 55mAlaska Airlines
Thu 5/310:30PDX - ONT
1 stop7h 12mAlaska Airlines
Deal found 15/10$325
Wed 31/1207:00ONT - PDX
Nonstop2h 29mAlaska Airlines
Sat 10/117:50PDX - ONT
Nonstop2h 25mAlaska Airlines
Deal found 16/10$327
Wed 21/107:00ONT - BZN
1 stop5h 06mAlaska Airlines
Sat 24/115:03BZN - ONT
1 stop6h 33mAlaska Airlines
Deal found 17/10$330
Fri 14/1116:11ONT - PDX
1 stop4h 26mAlaska Airlines
Sun 16/1121:32PDX - ONT
Nonstop2h 24mAlaska Airlines
Deal found 16/10$335
Wed 31/1207:00ONT - PDX
Nonstop2h 29mAlaska Airlines
Fri 9/110:46PDX - ONT
Nonstop2h 20mAlaska Airlines
Deal found 16/10$344

Find flights from Ontario within your budget

 
Find flights departing from Ontario that match your specified budget. Filter results by price range, allowing you to narrow down options and find flights that fit within your financial constraints. Please note that the search results are based on data from user searches, with fares last updated on 18 October 2025. In the last 7 days, Cheapflights users made a total of 134,765 searches

Fly to

Auckland

Route

Departure

Return

Price

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Wed 14/1

13:46-16:20

Nonstop2h 34m

Portland

Sat 17/1

17:50-20:15

Nonstop2h 25m

$274

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Wed 12/11

18:03-20:29

Nonstop2h 26m

Portland

Wed 19/11

21:32-23:56

Nonstop2h 24m

$274

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Sat 8/11

18:03-20:23

Nonstop2h 20m

Portland

Wed 12/11

14:46-17:09

Nonstop2h 23m

$274

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Thu 6/11

14:45-18:40

1 stop3h 55m

Portland

Sat 8/11

06:40-13:30

1 stop6h 50m

$292

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Sun 7/12

06:15-12:15

1 stop6h 00m

Portland

Sat 13/12

06:00-12:50

1 stop6h 50m

$292

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Sat 6/12

06:00-13:50

1 stop7h 50m

Portland

Tue 9/12

13:34-18:33

1 stop4h 59m

$307

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Fri 7/11

16:40-23:35

1 stop6h 55m

Portland

Sun 9/11

06:00-09:50

1 stop3h 50m

$309

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Thu 29/1

13:46-16:20

Nonstop2h 34m

Portland

Sun 1/2

10:46-13:06

Nonstop2h 20m

$309

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Thu 13/11

10:59-13:25

Nonstop2h 26m

Portland

Sun 16/11

07:37-09:58

Nonstop2h 21m

$309

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Fri 5/12

13:26-15:55

Nonstop2h 29m

Portland

Mon 8/12

17:45-20:03

Nonstop2h 18m

$309

Flights are sorted by cheapest return flights first.

Deals found on 16/10

Showing 1-10 of 60 results
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Best time to book a flight from Ontario

Have a flexible travel schedule? Discover the best time to fly from Ontario with our price prediction graph.
Estimated return 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.

Travel insights for flights from Ontario

Get recent, data-driven insights about flights from Ontario including ideal travel times, pricing trends, and more.

What is the cheapest month to book a flight from Ontario?

Currently, April is the cheapest month in which you can book a flight from Ontario (average of $574). Flying from Ontario in August will prove the most costly (average of $1,238). There are multiple factors that influence the price of a flight so comparing airlines, departure airports and times can help keep costs down.

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Related info for your journey

Access useful and relevant information related to your journey from Ontario. This can include details such as airport transportation, visa requirements, travel insurance, luggage regulations, and any other information that can ensure a smooth and hassle-free travel experience. Please note that the information is based on general guidance and may need to be verified with official sources. Data last updated 18 October 2025.

  • What are the most popular destinations to fly to from Ontario?

    The most popular destinations from Ontario this month are Dallas/Fort Worth Airport, Denver, Guadalajara. The top year-round destinations include Dallas/Fort Worth Airport, Denver, Guadalajara.

  • What is the cheapest first class flight from Ontario?

    If you’re looking for a cheap first-class flight from Ontario, consider Seattle. Prices start at $2,782 so you can fly first-class even on a budget.

  • What is the cheapest month to fly from Ontario?

    At the present moment the cheapest month to fly from Ontario is currently April; with August being the most expensive. Prices will vary depending on multiple factors such as booking in advance, airline and departure airports and times.

  • Where are the cheapest places to fly to from Ontario?

    Here are some of the cheapest flight destinations from Ontario:
    Fly from Ontario to Auckland from $1,830 round trip

  • How does Cheapflights help users find flights from Ontario?

    When you search for this flight from Ontario, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the best flight for you.

  • Why should you use Cheapflights to find cheap flight tickets from Ontario?

    Millions of users choose and trust Cheapflights to book the best flight deals from Ontario for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

  • Can Cheapflights find flights from Ontario with no change fees?

    Cheapflights does show flights with no change fees to all users. To see these options for flights from Ontario, users can toggle the no change fees filter when performing a flight search.

  • Can Cheapflights notify me if prices for flights from Ontario become cheaper?

    Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and use a valid email address to enable the Price Alerts feature. That’s it!

See more FAQs

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Ontario?

When you search for this flight from Ontario, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the best flight for you.

Why should you use Cheapflights to find cheap flight tickets from Ontario?

Millions of users choose and trust Cheapflights to book the best flight deals from Ontario for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

Can Cheapflights find flights from Ontario with no change fees?

Cheapflights does show flights with no change fees to all users. To see these options for flights from Ontario, users can toggle the no change fees filter when performing a flight search.

Can Cheapflights notify me if prices for flights from Ontario become cheaper?

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and use a valid email address to enable the Price Alerts feature. That’s it!

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