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$134+ 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 13/5. 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
5 Apr — 12 Apr1
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 6 March 2026.

Cheapest round-trip flight

$380

Cheapest airline

Avianca

Good one-way deal

$196 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 $576).
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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 6 March 2026.

Sat 4/417:53
ONT
-
PDX
1 stop4h 26m
Delta
Tue 7/405:45
PDX
-
ONT
1 stop6h 38m
Delta
Deal found 1/3$266
Sat 2/505:30
ONT
-
PDX
2 stops7h 25m
Southwest
Sat 9/507:00
PDX
-
ONT
1 stop5h 15m
Southwest
Deal found 2/3$274
Fri 3/417:49
ONT
-
PDX
Nonstop2h 27m
Alaska Airlines
Tue 14/417:58
PDX
-
ONT
Nonstop2h 25m
Alaska Airlines
Deal found 3/3$282
Sat 2/512:55
ONT
-
PDX
1 stop5h 55m
Southwest
Sun 3/505:50
PDX
-
ONT
1 stop5h 15m
Southwest
Deal found 2/3$291
Wed 8/405:45
ONT
-
PDX
1 stop6h 00m
Southwest
Wed 8/412:45
PDX
-
ONT
1 stop6h 25m
Southwest
Deal found 6/3$299
Tue 24/316:22
ONT
-
PDX
1 stop4h 23m
Alaska Airlines
Tue 7/417:58
PDX
-
ONT
Nonstop2h 25m
Alaska Airlines
Deal found 2/3$304
Sat 2/507:00
ONT
-
PDX
Nonstop2h 24m
Alaska Airlines
Thu 7/513:52
PDX
-
ONT
1 stop10h 07m
Alaska Airlines
Deal found 6/3$306
Sat 9/507:00
ONT
-
PDX
Nonstop2h 24m
Alaska Airlines
Sun 10/521:30
PDX
-
ONT
Nonstop2h 18m
Alaska Airlines
Deal found 2/3$316
Tue 28/407:00
ONT
-
PDX
Nonstop2h 24m
Alaska Airlines
Sat 2/508:45
PDX
-
ONT
1 stop25h 00m
Alaska Airlines
Deal found 1/3$321
Sat 9/505:30
ONT
-
PDX
2 stops6h 15m
Southwest
Sun 10/517:50
PDX
-
ONT
1 stop5h 45m
Southwest
Deal found 5/3$325
Fri 3/417:49
ONT
-
PDX
Nonstop2h 27m
Alaska Airlines
Mon 6/417:58
PDX
-
ONT
Nonstop2h 25m
Alaska Airlines
Deal found 2/3$333
Tue 24/316:35
ONT
-
BZN
1 stop6h 35m
Southwest
Mon 30/319:10
BZN
-
ONT
1 stop5h 25m
Southwest
Deal found 3/3$357

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 6 March 2026. In the last 7 days, Cheapflights users made a total of 134,765 searches

Fly to

Route

Departure

Return

Price

Cheapest return flight

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Tue 21/4

16:22-16:43

1 stop24h 21m

Portland

Sat 25/4

21:30-23:48

Nonstop2h 18m

$304

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Sat 9/5

12:48-16:43

1 stop3h 55m

Portland

Wed 13/5

21:31-23:56

Nonstop2h 25m

$304

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Tue 28/4

07:00-09:24

Nonstop2h 24m

Portland

Sat 2/5

07:00-14:19

1 stop7h 19m

$372

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Sat 4/4

18:10-00:55

2 stops6h 45m

Portland

Tue 7/4

07:40-13:45

1 stop6h 05m

$375

OntarioBozeman

ONT - BZN

ONTBZN

Ontario

Fri 24/4

06:00-11:04

1 stop4h 04m

Bozeman Gallatin Field

Tue 28/4

07:18-13:39

1 stop7h 21m

$381

OntarioBozeman

ONT - BZN

ONTBZN

Ontario

Fri 17/4

17:05-22:05

1 stop4h 00m

Bozeman Gallatin Field

Sun 19/4

16:25-22:35

1 stop7h 10m

$391

OntarioBozeman

ONT - BZN

ONTBZN

Ontario

Mon 27/7

14:09-23:22

1 stop8h 13m

Bozeman Gallatin Field

Wed 29/7

06:00-13:13

1 stop8h 13m

$391

OntarioHelena

ONT - HLN

ONTHLN

Ontario

Tue 7/4

17:09-22:30

1 stop4h 21m

Helena

Sat 11/4

13:02-16:28

1 stop4h 26m

$411

OntarioBozeman

ONT - BZN

ONTBZN

Ontario

Wed 1/4

07:00-13:10

1 stop5h 10m

Bozeman Gallatin Field

Wed 8/4

19:26-23:59

1 stop5h 33m

$411

OntarioBozeman

ONT - BZN

ONTBZN

Ontario

Fri 24/4

06:00-11:04

1 stop4h 04m

Bozeman Gallatin Field

Mon 27/4

07:18-13:39

1 stop7h 21m

$413

Flights are sorted by cheapest return flights first.

Deals found on 2/3

Showing 1-10 of 60 resultsSorted by cheapest first
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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 are popular destinations to fly to from Ontario?

Some of the most frequent flights departing from Ontario everyday are: Dallas (54 flights per day), Seattle (47 flights per day), and Phoenix (36 flights per day).

Phoenix Sky Harbor Intl
Phoenix Sky Harbor Intl
From $196

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 $196. Explore other affordable destinations below.

Phoenix Sky Harbor Intl
Phoenix Sky Harbor Intl
From $196

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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 6 March 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 $196 to Phoenix Sky Harbor Intl Airport (prices may vary depending on the airline and departure time). On average, users have booked flights for $196 to fly from Ontario.

  • 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 $1,397 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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