Find flights
Deals

$121+ 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 24/1. 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
27 Dec — 3 Jan1
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 27 November 2025.

Cheapest round-trip flight

$395

Cheapest airline

Avianca

Good one-way deal

$204 or less
The cheapest round-trip flight from Ontario is currently to San Salvador El Salvador Intl.
Search Deals
On average, Avianca currently has the cheapest one-way flight from Ontario (avg. price of $640).
Search Deals
Price to beat on a one-way flight from Ontario.
Search Deals

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 27 November 2025.

Sun 1/215:30ONT - PDX
1 stop5h 29mDelta
Tue 3/217:15PDX - ONT
1 stop5h 29mDelta
Deal found 25/11$294
Wed 31/1218:05ONT - PDX
Nonstop2h 25mAlaska Airlines
Sat 3/121:38PDX - ONT
Nonstop2h 21mAlaska Airlines
Deal found 25/11$301
Tue 27/107:00ONT - PDX
Nonstop2h 33mAlaska Airlines
Mon 2/207:10PDX - ONT
1 stop7h 58mAlaska Airlines
Deal found 25/11$303
Thu 8/117:59ONT - PDX
Nonstop2h 27mHawaiian Airlines
Sun 11/117:50PDX - ONT
Nonstop2h 20mHawaiian Airlines
Deal found 24/11$311
Mon 26/106:00ONT - PDX
1 stop6h 33mUnited Airlines
Thu 29/113:24PDX - ONT
1 stop7h 34mUnited Airlines
Deal found 26/11$320
Wed 31/1218:05ONT - PDX
Nonstop2h 25mAlaska Airlines
Sun 4/114:55PDX - ONT
Nonstop2h 16mAlaska Airlines
Deal found 25/11$336
Thu 22/113:46ONT - PDX
Nonstop2h 34mAlaska Airlines
Mon 26/117:35PDX - ONT
1 stop6h 21mAlaska Airlines
Deal found 24/11$338
Fri 19/1217:20ONT - PDX
1 stop4h 35mSouthwest
Thu 25/1211:30PDX - ONT
1 stop6h 25mSouthwest
Deal found 25/11$341
Tue 24/206:14ONT - PDX
1 stop4h 32mAlaska Airlines
Sun 1/306:00PDX - ONT
1 stop5h 08mAlaska Airlines
Deal found 25/11$345
Thu 29/116:03ONT - PDX
1 stop4h 44mAlaska Airlines
Fri 30/117:35PDX - ONT
1 stop6h 21mAlaska Airlines
Deal found 25/11$347
Wed 14/116:03ONT - BZN
1 stop6h 53mAlaska Airlines
Tue 20/107:20BZN - ONT
1 stop8h 48mAlaska Airlines
Deal found 24/11$370
Thu 14/517:05ONT - BZN
1 stop5h 54mDelta
Thu 21/505:45BZN - ONT
1 stop4h 16mDelta
Deal found 25/11$382

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 27 November 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

Wed 21/1

13:46-16:20

Nonstop2h 34m

Portland

Mon 26/1

17:35-23:56

1 stop6h 21m

$303

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Wed 18/2

07:00-09:28

Nonstop2h 28m

Portland

Mon 23/2

08:30-23:32

1 stop15h 02m

$303

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Thu 25/12

18:05-20:30

Nonstop2h 25m

Portland

Thu 1/1

21:38-23:59

Nonstop2h 21m

$311

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Wed 31/12

18:05-20:30

Nonstop2h 25m

Portland

Sun 4/1

09:49-12:08

Nonstop2h 19m

$336

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Fri 9/1

16:03-20:47

1 stop4h 44m

Portland

Sun 11/1

14:43-17:03

Nonstop2h 20m

$338

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Fri 19/12

17:20-21:55

1 stop4h 35m

Portland

Thu 25/12

11:30-17:55

1 stop6h 25m

$341

OntarioBozeman

ONT - BZN

ONTBZN

Ontario

Tue 10/2

17:10-23:17

1 stop5h 07m

Bozeman Gallatin Field

Sat 14/2

18:25-21:44

1 stop4h 19m

$382

OntarioBozeman

ONT - BZN

ONTBZN

Ontario

Wed 13/5

07:00-14:36

1 stop6h 36m

Bozeman Gallatin Field

Thu 21/5

05:45-09:01

1 stop4h 16m

$382

OntarioBozeman

ONT - BZN

ONTBZN

Ontario

Thu 14/5

17:05-23:59

1 stop5h 54m

Bozeman Gallatin Field

Thu 21/5

05:45-09:01

1 stop4h 16m

$382

OntarioBozeman

ONT - BZN

ONTBZN

Ontario

Thu 14/5

17:05-23:59

1 stop5h 54m

Bozeman Gallatin Field

Fri 22/5

05:45-09:01

1 stop4h 16m

$382

Flights are sorted by cheapest return flights first.

Deals found on 24/11

Showing 1-10 of 60 results
1
2
3
...
6

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 $579). Flying from Ontario in August will prove the most costly (average of $1,247). 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 (104 flights per day), Dallas (78 flights per day), and Atlanta (67 flights per day).

Phoenix Sky Harbor Intl
Phoenix Sky Harbor Intl
From $204

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 $204. Explore other affordable destinations below.

Phoenix Sky Harbor Intl
Phoenix Sky Harbor Intl
From $204

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Direct flights from California

Book a direct flight from one of these other cities located in California.
Direct flights from Los Angeles
Direct flights from San Francisco
Direct flights from San Diego
Direct flights from San Jose
Direct flights from Palm Springs

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 27 November 2025.

  • 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 $204 to Phoenix Sky Harbor Intl Airport (prices may vary depending on the airline and departure time). On average, users have booked flights for $204 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 $2,804 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 $1,511 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!

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.