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$106+ Cheap flights from Ontario

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 1/11. 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
13 Oct — 20 Oct1
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 13 September 2025.

Cheapest one-way flight

$854

Cheapest airline

Spirit Airlines

Most popular destination

Nadi (NAN)

Good one-way deal

$1,114 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 $191).
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Nadi (NAN) is currently the most popular flight destination from Ontario (average return price of $1,077).
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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 13 September 2025.

Tue 28/1006:15ONT - PDX
1 stop4h 50mSouthwest
Tue 4/1105:00PDX - ONT
1 stop7h 10mSouthwest
Deal found 13/9$191
Sat 15/1105:30ONT - PDX
1 stop6h 15mSouthwest
Wed 19/1111:30PDX - ONT
1 stop6h 25mSouthwest
Deal found 13/9$201
Wed 29/1014:20ONT - PDX
1 stop5h 20mSouthwest
Mon 3/1106:40PDX - ONT
1 stop6h 35mSouthwest
Deal found 11/9$235
Sat 11/1015:35ONT - PDX
1 stop6h 05mSouthwest
Tue 14/1016:55PDX - ONT
1 stop5h 05mSouthwest
Deal found 11/9$243
Sat 22/1115:40ONT - PDX
1 stop6h 30mSouthwest
Thu 27/1107:05PDX - ONT
1 stop7h 25mSouthwest
Deal found 12/9$247
Fri 24/1017:55ONT - PDX
1 stop6h 20mSouthwest
Wed 5/1106:40PDX - ONT
1 stop3h 55mSouthwest
Deal found 12/9$250
Sat 11/1016:55ONT - PDX
1 stop5h 20mSouthwest
Mon 13/1005:30PDX - ONT
1 stop5h 00mSouthwest
Deal found 12/9$255
Mon 24/1116:40ONT - PDX
1 stop6h 55mSouthwest
Thu 27/1107:05PDX - ONT
1 stop7h 25mSouthwest
Deal found 12/9$280
Sat 11/1018:51ONT - PDX
1 stop5h 37mUnited Airlines
Wed 15/1017:15PDX - ONT
1 stop5h 37mUnited Airlines
Deal found 11/9$282
Sat 4/1013:30ONT - PDX
1 stop8h 05mSouthwest
Sun 5/1021:20PDX - ONT
1 stop9h 45mSouthwest
Deal found 12/9$284
Thu 2/1006:00ONT - BZN
1 stop4h 05mDelta
Wed 8/1005:35BZN - ONT
1 stop4h 30mDelta
Deal found 11/9$398
Thu 2/1006:00ONT - BZN
1 stop4h 05mDelta
Mon 6/1005:35BZN - ONT
1 stop4h 30mDelta
Deal found 11/9$399

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 13 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

Tue 28/10

06:15-11:05

1 stop4h 50m

Portland

Tue 4/11

05:00-12:10

1 stop7h 10m

$191

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Sat 15/11

05:30-11:45

1 stop6h 15m

Portland

Wed 19/11

11:30-17:55

1 stop6h 25m

$201

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Mon 10/11

18:30-23:10

1 stop4h 40m

Portland

Wed 12/11

07:00-11:55

1 stop4h 55m

$235

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Fri 24/10

17:55-00:15

1 stop6h 20m

Portland

Wed 5/11

06:40-10:35

1 stop3h 55m

$250

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Thu 4/12

17:25-21:25

1 stop4h 00m

Portland

Thu 11/12

07:00-11:55

1 stop4h 55m

$280

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Sat 11/10

17:45-20:03

Nonstop2h 18m

Portland

Wed 15/10

21:30-23:51

Nonstop2h 21m

$297

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Sat 11/10

11:48-19:19

1 stop7h 31m

Portland

Wed 15/10

15:19-22:41

1 stop7h 22m

$297

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Tue 28/10

07:20-09:50

Nonstop2h 30m

Portland

Tue 4/11

07:37-09:58

Nonstop2h 21m

$297

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Sat 15/11

11:46-19:19

1 stop7h 33m

Portland

Wed 19/11

17:05-23:52

1 stop6h 47m

$297

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Wed 17/12

07:10-09:41

Nonstop2h 31m

Portland

Sun 21/12

21:38-23:59

Nonstop2h 21m

$314

Flights are sorted by cheapest return flights first.

Deals found on 12/9

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 $552). Flying from Ontario in August will prove the most costly (average of $1,189). 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: Dallas (117 flights per day), Seattle (83 flights per day), and Atlanta (71 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 $1,114. 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 13 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, Honolulu. 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 $1,114 to Honolulu (prices may vary depending on the airline and departure time). On average, users have booked flights for $1,152 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 $2,673 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 $1,433 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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