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$165+ 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 27/8. 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
19 Jul — 26 Jul1
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 14 July 2025.

Cheapest one-way flight

$301

Cheapest round-trip flight

$81

Cheapest airline

Spirit Airlines

Most popular destination

Nadi (NAN)

Good one-way deal

$1,105 or less
The cheapest one-way flight from Ontario is currently to Calgary.
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The cheapest round-trip 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 $208).
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Nadi (NAN) is currently the most popular flight destination from Ontario (average return price of $666).
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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 14 July 2025.

Sat 11/1007:10ONT - PDX
Nonstop2h 20mHawaiian Airlines
Tue 14/1007:40PDX - ONT
Nonstop2h 21mHawaiian Airlines
Deal found 14/7$295
Sat 23/807:10ONT - PDX
Nonstop2h 17mAlaska Airlines
Fri 29/807:03PDX - ONT
Nonstop2h 23mAlaska Airlines
Deal found 13/7$311
Tue 26/811:40ONT - PDX
1 stop5h 19mDelta
Sun 31/815:18PDX - ONT
1 stop7h 24mDelta
Deal found 13/7$328
Sun 31/811:35ONT - PDX
1 stop4h 45mSouthwest
Sun 7/905:25PDX - ONT
1 stop7h 40mSouthwest
Deal found 14/7$330
Wed 15/1013:53ONT - PDX
1 stop6h 57mUnited Airlines
Wed 22/1005:30PDX - ONT
1 stop6h 43mUnited Airlines
Deal found 13/7$381
Wed 24/906:00ONT - BZN
1 stop7h 14mHawaiian Airlines
Sat 27/905:22BZN - ONT
1 stop5h 04mHawaiian Airlines
Deal found 13/7$393
Sat 30/806:05ONT - BZN
1 stop3h 44mDelta
Tue 2/905:30BZN - ONT
1 stop4h 25mDelta
Deal found 13/7$394
Sun 24/806:00ONT - BZN
1 stop7h 14mAlaska Airlines
Sat 6/905:22BZN - ONT
1 stop5h 04mAlaska Airlines
Deal found 13/7$396
Fri 22/813:15ONT - BZN
1 stop7h 16mUnited Airlines
Sat 30/814:41BZN - ONT
1 stop7h 02mUnited Airlines
Deal found 12/7$398
Tue 12/816:50ONT - BIL
1 stop4h 44mDelta
Wed 13/818:08BIL - ONT
1 stop6h 32mDelta
Deal found 11/7$401
Wed 29/1010:45ONT - BZN
1 stop5h 30mSouthwest
Wed 5/1105:30BZN - ONT
2 stops7h 40mSouthwest
Deal found 12/7$403
Tue 12/813:34ONT - BIL
1 stop6h 29mUnited Airlines
Wed 13/805:00BIL - ONT
2 stops8h 14mUnited Airlines
Deal found 11/7$409

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 14 July 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

Sat 11/10

07:10-09:30

Nonstop2h 20m

Portland

Tue 14/10

07:40-10:01

Nonstop2h 21m

$295

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Sat 23/8

07:10-09:27

Nonstop2h 17m

Portland

Fri 29/8

07:03-09:26

Nonstop2h 23m

$311

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Tue 26/8

11:40-16:59

1 stop5h 19m

Portland

Sun 31/8

15:18-22:42

1 stop7h 24m

$328

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Sun 31/8

11:35-16:20

1 stop4h 45m

Portland

Sun 7/9

05:25-13:05

1 stop7h 40m

$330

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Wed 15/10

13:53-20:50

1 stop6h 57m

Portland

Wed 22/10

05:30-12:13

1 stop6h 43m

$381

OntarioBozeman

ONT - BZN

ONTBZN

Ontario

Wed 24/9

06:00-14:14

1 stop7h 14m

Bozeman Gallatin Field

Sat 27/9

05:22-09:26

1 stop5h 04m

$393

OntarioBozeman

ONT - BZN

ONTBZN

Ontario

Sat 30/8

06:05-10:49

1 stop3h 44m

Bozeman Gallatin Field

Tue 2/9

05:30-08:55

1 stop4h 25m

$394

OntarioBozeman

ONT - BZN

ONTBZN

Ontario

Sun 24/8

06:00-14:14

1 stop7h 14m

Bozeman Gallatin Field

Sat 6/9

05:22-09:26

1 stop5h 04m

$396

OntarioBillings

ONT - BIL

ONTBIL

Ontario

Tue 12/8

16:50-22:34

1 stop4h 44m

Billings Logan Intl

Wed 13/8

18:08-23:40

1 stop6h 32m

$401

OntarioBozeman

ONT - BZN

ONTBZN

Ontario

Wed 29/10

10:45-17:15

1 stop5h 30m

Bozeman Gallatin Field

Wed 5/11

05:30-12:10

2 stops7h 40m

$403

Flights are sorted by cheapest return flights first.

Deals found on 12/7

Showing 1-10 of 55 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 $548). Flying from Ontario in September will prove the most costly (average of $1,178). 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 (158 flights per day), Dallas (124 flights per day), and Atlanta (82 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 $1,105. Explore other affordable destinations below.

Honolulu
Honolulu
From $664

Airline reviews for flights from Ontario

Get insights into the airlines that provide service from Ontario. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing airline for your flight from Ontario. In the last 7 days, Cheapflights users made a total of 134,765 searches.
Check out reviews from past customers who have flown Alaska Airlines and United Airlines from Ontario to help guide your decision. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very Good
10,000 reviews
Check prices

Boarding

8.1

Crew

8.5

Comfort

7.8

Overall

8.0

Entertainment

7.1

Food

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very Good
10,000 reviews
Alaska Airlines
8.0
Very Good
10,000 reviews
Check prices

Boarding

8.1

Crew

8.5

Comfort

7.8

Overall

8.0

Entertainment

7.1

Food

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
United Airlines
7.4
Good
8,856 reviews
Alaska Airlines
8.0
Very Good
10,000 reviews
Check prices

Boarding

8.1

Crew

8.5

Comfort

7.8

Overall

8.0

Entertainment

7.1

Food

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

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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 14 July 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 $1,105 to Honolulu (prices may vary depending on the airline and departure time). On average, users have booked flights for $1,143 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 $2,652 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 September 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 $1,312 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!

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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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