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$123+ 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 18/3. 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
21 Mar — 28 Mar1
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 19 February 2026.

Cheapest round-trip flight

$375

Cheapest airline

Avianca

Good one-way deal

$193 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 $568).
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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 19 February 2026.

Sat 14/307:00
ONT
-
PDX
Nonstop2h 28m
Alaska Airlines
Sun 15/321:30
PDX
-
ONT
Nonstop2h 22m
Alaska Airlines
Deal found 18/2$262
Tue 7/407:00
ONT
-
PDX
Nonstop2h 28m
Alaska Airlines
Mon 13/417:58
PDX
-
ONT
Nonstop2h 25m
Alaska Airlines
Deal found 18/2$279
Sat 14/318:10
ONT
-
PDX
1 stop7h 30m
Southwest
Tue 17/306:30
PDX
-
ONT
1 stop3h 55m
Southwest
Deal found 17/2$287
Thu 19/317:53
ONT
-
PDX
1 stop6h 06m
Delta
Tue 31/317:02
PDX
-
ONT
1 stop6h 49m
Delta
Deal found 18/2$290
Fri 13/318:08
ONT
-
PDX
Nonstop2h 25m
Alaska Airlines
Mon 16/321:30
PDX
-
ONT
Nonstop2h 22m
Alaska Airlines
Deal found 18/2$295
Sat 21/318:35
ONT
-
PDX
1 stop3h 50m
Southwest
Thu 26/305:00
PDX
-
ONT
1 stop7h 30m
Southwest
Deal found 18/2$299
Wed 18/316:22
ONT
-
PDX
1 stop4h 23m
Alaska Airlines
Tue 31/308:00
PDX
-
ONT
Nonstop2h 19m
Alaska Airlines
Deal found 18/2$300
Wed 15/406:00
ONT
-
PDX
1 stop6h 35m
Alaska Airlines
Tue 21/417:58
PDX
-
ONT
Nonstop2h 25m
Alaska Airlines
Deal found 18/2$302
Sat 4/418:10
ONT
-
PDX
1 stop7h 30m
Southwest
Sat 18/413:35
PDX
-
ONT
2 stops7h 10m
Southwest
Deal found 16/2$304
Wed 8/415:30
ONT
-
PDX
1 stop5h 00m
Southwest
Thu 16/414:50
PDX
-
ONT
1 stop7h 50m
Southwest
Deal found 16/2$307
Mon 9/307:00
ONT
-
PDX
Nonstop2h 28m
Alaska Airlines
Tue 12/521:30
PDX
-
ONT
Nonstop2h 18m
Alaska Airlines
Deal found 16/2$312
Sat 21/311:59
ONT
-
PDX
1 stop7h 01m
Delta
Thu 26/319:17
PDX
-
ONT
1 stop4h 34m
Delta
Deal found 17/2$315

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 19 February 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

Sat 14/3

07:00-09:28

Nonstop2h 28m

Portland

Mon 16/3

21:30-23:52

Nonstop2h 22m

$262

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Fri 8/5

07:00-09:24

Nonstop2h 24m

Portland

Tue 12/5

21:30-23:48

Nonstop2h 18m

$262

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Wed 25/3

07:00-09:28

Nonstop2h 28m

Portland

Wed 1/4

08:00-10:19

Nonstop2h 19m

$279

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Wed 8/4

07:00-09:28

Nonstop2h 28m

Portland

Fri 24/4

21:30-23:48

Nonstop2h 18m

$279

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Sat 9/5

09:25-13:55

1 stop4h 30m

Portland

Mon 11/5

16:55-23:05

1 stop6h 10m

$290

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Thu 12/3

07:00-09:28

Nonstop2h 28m

Portland

Sun 15/3

21:30-23:52

Nonstop2h 22m

$295

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Fri 13/3

18:08-20:33

Nonstop2h 25m

Portland

Sun 15/3

21:30-23:52

Nonstop2h 22m

$295

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Wed 25/3

07:00-09:28

Nonstop2h 28m

Portland

Tue 31/3

08:00-10:19

Nonstop2h 19m

$295

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Fri 13/3

07:00-09:28

Nonstop2h 28m

Portland

Mon 16/3

14:50-17:14

Nonstop2h 24m

$295

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Wed 18/3

16:22-20:45

1 stop4h 23m

Portland

Tue 31/3

08:00-10:19

Nonstop2h 19m

$300

Flights are sorted by cheapest return flights first.

Deals found on 18/2

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 $592). Flying from Ontario in July will prove the most costly (average of $1,194). 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 (112 flights per day), Phoenix (86 flights per day), and Seattle (75 flights per day).

Phoenix Sky Harbor Intl
Phoenix Sky Harbor Intl
From $193

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 $193. Explore other affordable destinations below.

Phoenix Sky Harbor Intl
Phoenix Sky Harbor Intl
From $193

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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 19 February 2026.

  • 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 flight from Ontario to anywhere?

    Users have flown out of Ontario for as low as $193 to Phoenix Sky Harbor Intl Airport (prices may vary depending on the airline and departure time). On average, users have booked flights for $193 to fly from Ontario.

  • What is the cheapest month to fly from Ontario?

    At the present moment the cheapest month to fly from Ontario is currently April; with July 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 $1,296 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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