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$130+ 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 3/10. 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
7 Sep — 14 Sep1
1 adult

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 2 September 2025.

Cheapest one-way flight

$890

Cheapest airline

Spirit Airlines

Most popular destination

Nadi (NAN)

Good one-way deal

$1,125 or less
The cheapest one-way flight from Ontario is currently to Nadi.
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On average, Spirit Airlines currently has the cheapest one-way flight from Ontario (avg. price of $193).
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Nadi (NAN) is currently the most popular flight destination from Ontario (average return price of $1,033).
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Price to beat on a one-way flight from Ontario.
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Find flights from Ontario

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 2 September 2025.

Tue 30/917:40ONT - PDX
1 stop6h 12mDelta
Sat 11/1017:25PDX - ONT
1 stop5h 16mDelta
Deal found 1/9$266
Sat 11/1011:48ONT - PDX
1 stop4h 57mDelta
Tue 14/1019:15PDX - ONT
1 stop4h 24mDelta
Deal found 30/8$300
Fri 10/1007:10ONT - PDX
Nonstop2h 20mAlaska Airlines
Tue 14/1010:40PDX - ONT
Nonstop2h 21mAlaska Airlines
Deal found 31/8$317
Sat 11/1007:10ONT - PDX
Nonstop2h 20mAlaska Airlines
Tue 14/1010:40PDX - ONT
Nonstop2h 21mAlaska Airlines
Deal found 30/8$334
Thu 9/1007:10ONT - PDX
Nonstop2h 20mAlaska Airlines
Sun 12/1021:30PDX - ONT
Nonstop2h 21mAlaska Airlines
Deal found 31/8$351
Sat 15/1106:00ONT - PDX
1 stop4h 32mAlaska Airlines
Sat 15/1114:30PDX - ONT
1 stop6h 23mAlaska Airlines
Deal found 30/8$357
Tue 30/906:00ONT - PDX
1 stop6h 27mAlaska Airlines
Wed 1/1013:24PDX - ONT
1 stop5h 23mAlaska Airlines
Deal found 31/8$366
Fri 3/1011:50ONT - PDX
1 stop5h 20mDelta
Mon 6/1017:25PDX - ONT
1 stop5h 16mDelta
Deal found 30/8$368
Tue 7/1007:10ONT - PDX
Nonstop2h 20mAlaska Airlines
Tue 7/1013:25PDX - ONT
1 stop5h 08mAlaska Airlines
Deal found 30/8$374
Thu 13/1106:00ONT - PDX
1 stop4h 32mAlaska Airlines
Mon 17/1117:30PDX - ONT
1 stop6h 02mAlaska Airlines
Deal found 30/8$383
Sat 4/1007:10ONT - PDX
Nonstop2h 20mAlaska Airlines
Tue 7/1018:00PDX - ONT
1 stop6h 03mAlaska Airlines
Deal found 31/8$385
Mon 29/911:39ONT - BZN
1 stop5h 49mHawaiian Airlines
Mon 6/1019:34BZN - ONT
1 stop5h 29mHawaiian Airlines
Deal found 30/8$423

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 2 September 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 1/10

17:40-23:52

1 stop6h 12m

Portland

Tue 7/10

05:40-12:14

1 stop6h 34m

$266

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Tue 30/9

17:40-23:52

1 stop6h 12m

Portland

Sat 11/10

17:25-22:41

1 stop5h 16m

$266

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Sat 4/10

11:50-17:10

1 stop5h 20m

Portland

Sat 11/10

15:19-22:41

1 stop7h 22m

$266

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Sat 11/10

11:48-19:19

1 stop7h 31m

Portland

Wed 15/10

17:25-22:41

1 stop5h 16m

$266

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Sat 4/10

11:50-17:10

1 stop5h 20m

Portland

Tue 7/10

09:58-15:53

1 stop5h 55m

$266

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Tue 30/9

17:40-23:52

1 stop6h 12m

Portland

Wed 8/10

05:30-11:08

1 stop5h 38m

$266

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Wed 1/10

17:40-23:52

1 stop6h 12m

Portland

Sat 11/10

15:19-22:41

1 stop7h 22m

$266

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Tue 30/9

17:40-23:52

1 stop6h 12m

Portland

Tue 7/10

19:15-23:39

1 stop4h 24m

$266

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Sat 4/10

11:50-17:10

1 stop5h 20m

Portland

Wed 8/10

19:15-23:39

1 stop4h 24m

$266

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Wed 8/10

17:50-22:40

1 stop4h 50m

Portland

Sat 11/10

17:25-22:41

1 stop5h 16m

$300

Flights are sorted by cheapest return flights first.

Deals found on 31/8

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 $557). Flying from Ontario in August will prove the most costly (average of $1,201). There are multiple factors that influence the price of a flight so comparing airlines, departure airports and times can help keep costs down.

What are popular destinations to fly to from Ontario?

Some of the most frequent flights departing from Ontario everyday are: Seattle (88 flights per day), Atlanta (68 flights per day), and Denver (60 flights per day).

Honolulu
Honolulu
From $664

What is the cheapest place to fly to from Ontario?

The cheapest city to fly to from Ontario is Honolulu, with prices starting at $1,125. Explore other affordable destinations below.

Honolulu
Honolulu
From $664

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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 2 September 2025.

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

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

  • What is the cheapest flight from Ontario to anywhere?

    Users have flown out of Ontario for as low as $1,125 to Honolulu (prices may vary depending on the airline and departure time). On average, users have booked flights for $1,163 to fly from Ontario.

  • 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 $2,699 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 $1,452 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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