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$135+ 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 24/3. 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 Feb — 26 Feb1
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 20 January 2026.

Cheapest round-trip flight

$385

Cheapest airline

Avianca

Good one-way deal

$199 or less
The cheapest round-trip flight from Ontario is currently to San Salvador El Salvador Intl.
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On average, Avianca currently has the cheapest one-way flight from Ontario (avg. price of $584).
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Price to beat on a one-way flight from Ontario.
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Find flights from Ontario

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 20 January 2026.

Sat 7/307:00
ONT
-
PDX
Nonstop2h 28m
Alaska Airlines
Wed 11/321:30
PDX
-
ONT
Nonstop2h 22m
Alaska Airlines
Deal found 20/1$269
Wed 11/206:00
ONT
-
PDX
1 stop6h 33m
United Airlines
Tue 17/207:30
PDX
-
ONT
1 stop5h 18m
United Airlines
Deal found 20/1$280
Wed 11/313:20
ONT
-
PDX
1 stop4h 50m
Delta
Fri 13/319:15
PDX
-
ONT
1 stop4h 36m
Delta
Deal found 19/1$286
Tue 3/306:05
ONT
-
PDX
2 stops7h 20m
Southwest
Tue 10/306:30
PDX
-
ONT
1 stop3h 55m
Southwest
Deal found 20/1$288
Wed 11/215:15
ONT
-
PDX
2 stops6h 05m
Southwest
Tue 17/205:50
PDX
-
ONT
1 stop4h 15m
Southwest
Deal found 20/1$295
Wed 18/207:00
ONT
-
PDX
Nonstop2h 28m
Alaska Airlines
Sat 21/207:45
PDX
-
ONT
Nonstop2h 19m
Alaska Airlines
Deal found 20/1$304
Wed 8/419:08
ONT
-
PDX
1 stop4h 36m
Alaska Airlines
Sun 12/408:00
PDX
-
ONT
Nonstop2h 19m
Alaska Airlines
Deal found 20/1$310
Thu 12/316:02
ONT
-
PDX
1 stop6h 39m
Alaska Airlines
Sun 15/321:30
PDX
-
ONT
Nonstop2h 22m
Alaska Airlines
Deal found 20/1$321
Sun 15/205:00
ONT
-
PDX
1 stop8h 44m
United Airlines
Wed 18/205:05
PDX
-
ONT
1 stop7h 38m
United Airlines
Deal found 19/1$329
Wed 20/510:40
ONT
-
PDX
1 stop7h 50m
Southwest
Mon 25/505:20
PDX
-
ONT
1 stop6h 40m
Southwest
Deal found 19/1$331
Mon 9/307:00
ONT
-
PDX
Nonstop2h 28m
Alaska Airlines
Thu 12/321:30
PDX
-
ONT
Nonstop2h 22m
Alaska Airlines
Deal found 20/1$338
Tue 24/206:14
ONT
-
BZN
1 stop6h 54m
Alaska Airlines
Tue 3/315:02
BZN
-
ONT
1 stop8h 42m
Alaska Airlines
Deal found 19/1$362

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 20 January 2026. 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

Thu 2/4

17:49-20:16

Nonstop2h 27m

Portland

Wed 8/4

17:58-20:23

Nonstop2h 25m

$269

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Thu 5/3

07:00-09:28

Nonstop2h 28m

Portland

Mon 9/3

21:30-23:52

Nonstop2h 22m

$269

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Thu 19/2

07:00-09:28

Nonstop2h 28m

Portland

Sun 22/2

21:30-23:52

Nonstop2h 22m

$269

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Tue 24/3

07:00-09:28

Nonstop2h 28m

Portland

Sun 29/3

08:00-10:19

Nonstop2h 19m

$269

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Sat 14/3

07:00-09:28

Nonstop2h 28m

Portland

Mon 16/3

14:50-17:14

Nonstop2h 24m

$269

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Mon 23/3

07:00-09:28

Nonstop2h 28m

Portland

Tue 31/3

17:58-20:23

Nonstop2h 25m

$269

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Thu 16/4

10:59-13:26

Nonstop2h 27m

Portland

Mon 20/4

17:58-20:23

Nonstop2h 25m

$269

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Fri 10/4

17:49-20:16

Nonstop2h 27m

Portland

Sun 12/4

08:00-10:19

Nonstop2h 19m

$269

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Tue 21/4

17:05-23:53

1 stop6h 48m

Portland

Sat 25/4

17:59-22:37

1 stop4h 38m

$286

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Fri 13/2

15:40-00:05

1 stop8h 25m

Portland

Sun 15/2

12:00-19:05

1 stop7h 05m

$286

Flights are sorted by cheapest return flights first.

Deals found on 20/1

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 $566). Flying from Ontario in August will prove the most costly (average of $1,216). 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 (96 flights per day), Seattle (75 flights per day), and Phoenix (68 flights per day).

Phoenix Sky Harbor Intl
Phoenix Sky Harbor Intl
From $199

What is the cheapest place to fly to from Ontario?

The cheapest city to fly to from Ontario is Phoenix Sky Harbor Intl, with prices starting at $199. Explore other affordable destinations below.

Phoenix Sky Harbor Intl
Phoenix Sky Harbor Intl
From $199

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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 20 January 2026.

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

    The most popular destinations from Ontario this month are Guadalajara, 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 $199 to Phoenix Sky Harbor Intl Airport (prices may vary depending on the airline and departure time). On average, users have booked flights for $199 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 $2,733 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 $1,571 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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