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$122+ 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 29/11. 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
11 Dec — 18 Dec1
1 adult
1 adult, Economy, 0 bags

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 11 November 2025.

Cheapest airline

Alaska Airlines
On average, Alaska Airlines currently has the cheapest one-way flight from Ontario (avg. price of $1,653).
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Find flights from Ontario

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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 11 November 2025.

Sat 6/1207:10ONT - PDX
Nonstop2h 31mAlaska Airlines
Tue 9/1210:30PDX - ONT
Nonstop2h 16mAlaska Airlines
Deal found 9/11$278
Wed 3/1206:00ONT - PDX
1 stop6h 40mDelta
Sat 6/1205:25PDX - ONT
1 stop7h 09mDelta
Deal found 10/11$296
Wed 3/1207:10ONT - PDX
Nonstop2h 31mAlaska Airlines
Mon 8/1217:49PDX - ONT
1 stop5h 40mAlaska Airlines
Deal found 10/11$305
Tue 24/206:14ONT - PDX
1 stop6h 30mAlaska Airlines
Tue 3/310:30PDX - ONT
1 stop4h 38mAlaska Airlines
Deal found 9/11$312
Thu 4/1213:26ONT - PDX
Nonstop2h 29mAlaska Airlines
Sun 7/1217:45PDX - ONT
Nonstop2h 18mAlaska Airlines
Deal found 10/11$314
Fri 5/1213:26ONT - PDX
Nonstop2h 29mAlaska Airlines
Mon 8/1220:44PDX - ONT
1 stop14h 35mAlaska Airlines
Deal found 10/11$323
Tue 3/316:02ONT - PDX
1 stop7h 44mAlaska Airlines
Thu 5/314:45PDX - ONT
1 stop4h 12mAlaska Airlines
Deal found 8/11$330
Thu 4/1217:49ONT - PDX
1 stop6h 27mDelta
Mon 8/1219:09PDX - ONT
1 stop4h 49mDelta
Deal found 9/11$332
Sat 13/1212:40ONT - PDX
1 stop9h 57mDelta
Mon 15/1205:30PDX - ONT
1 stop5h 43mDelta
Deal found 10/11$335
Fri 5/1219:33ONT - PDX
1 stop18h 17mAlaska Airlines
Sat 6/1217:45PDX - ONT
Nonstop2h 18mAlaska Airlines
Deal found 10/11$339
Mon 22/1218:05ONT - PDX
Nonstop2h 25mAlaska Airlines
Wed 7/119:38PDX - ONT
1 stop19h 30mAlaska Airlines
Deal found 8/11$340
Fri 12/1207:10ONT - PDX
Nonstop2h 31mAlaska Airlines
Sun 14/1217:45PDX - ONT
Nonstop2h 18mAlaska Airlines
Deal found 10/11$349

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 11 November 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 10/12

07:10-09:41

Nonstop2h 31m

Portland

Sat 13/12

17:45-20:03

Nonstop2h 18m

$278

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Wed 3/12

07:10-09:41

Nonstop2h 31m

Portland

Mon 8/12

10:30-12:46

Nonstop2h 16m

$296

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Tue 6/1

12:48-15:17

Nonstop2h 29m

Portland

Sun 11/1

14:43-17:03

Nonstop2h 20m

$296

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Thu 25/12

18:05-20:30

Nonstop2h 25m

Portland

Tue 30/12

21:38-23:59

Nonstop2h 21m

$296

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Sat 13/12

07:10-09:41

Nonstop2h 31m

Portland

Sun 18/1

14:43-17:03

Nonstop2h 20m

$296

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Tue 24/2

06:14-12:44

1 stop6h 30m

Portland

Tue 3/3

10:30-15:08

1 stop4h 38m

$312

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Wed 4/3

16:54-23:55

1 stop7h 01m

Portland

Mon 9/3

17:45-22:38

1 stop4h 53m

$314

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Thu 4/12

17:49-22:40

1 stop4h 51m

Portland

Sat 6/12

17:15-22:47

1 stop5h 32m

$314

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Thu 29/1

07:00-09:33

Nonstop2h 33m

Portland

Mon 2/2

14:43-17:03

Nonstop2h 20m

$314

OntarioBozeman

ONT - BZN

ONTBZN

Ontario

Thu 4/12

17:49-22:26

1 stop27h 37m

Bozeman Gallatin Field

Sun 7/12

15:00-11:13

1 stop21h 13m

$401

Flights are sorted by cheapest return flights first.

Deals found on 8/11

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 $583). Flying from Ontario in August will prove the most costly (average of $1,257). 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 11 November 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 $2,825 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 $1,702 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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