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$91+ Cheap flights from Ontario

This is the cheapest return flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 19/2. 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 — SYD
28 Jan — 4 Feb1
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 23 January 2025.

Cheapest one-way flight

$50

Cheapest round-trip flight

$70

Cheapest airline

American Airlines

Most popular destination

Sydney Kingsford Smith (SYD)

Good one-way deal

$114 or less
The cheapest one-way flight from Ontario is currently to San Francisco.
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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, American Airlines currently has the cheapest one-way flight from Ontario (avg. price of $228).
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Sydney Kingsford Smith (SYD) is currently the most popular flight destination from Ontario (average return price of $1,143).
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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 23 January 2025.

Thu 27/317:30ONT - LAS
Nonstop1h 05mSouthwest
Thu 27/322:15LAS - ONT
Nonstop1h 05mSouthwest
Deal found 22/1$210
Tue 25/307:00ONT - PDX
Nonstop2h 24mAlaska Airlines
Tue 1/421:41PDX - ONT
Nonstop2h 18mAlaska Airlines
Deal found 23/1$250
Sat 22/206:00ONT - PDX
1 stop6h 28mDelta
Sun 23/219:11PDX - ONT
1 stop4h 40mDelta
Deal found 22/1$348
Tue 25/306:15ONT - PDX
1 stop6h 35mSouthwest
Sat 29/306:05PDX - ONT
2 stops10h 15mSouthwest
Deal found 22/1$354
Tue 25/306:00ONT - PDX
1 stop6h 37mUnited Airlines
Tue 1/413:39PDX - ONT
1 stop6h 42mUnited Airlines
Deal found 23/1$418
Thu 6/213:21ONT - JFK
1 stop7h 52mDelta
Tue 11/206:00JFK - ONT
1 stop8h 50mDelta
Deal found 22/1$442
Tue 25/206:00ONT - JFK
1 stop10h 29mAlaska Airlines
Fri 28/216:00JFK - ONT
1 stop10h 24mAlaska Airlines
Deal found 21/1$457
Sun 9/307:00ONT - LAS
1 stop14h 27mAlaska Airlines
Wed 12/306:20LAS - ONT
2 stops10h 39mAlaska Airlines
Deal found 22/1$475
Wed 9/414:43ONT - JFK
1 stop11h 47mFrontier
Tue 15/406:59JFK - ONT
1 stop11h 05mFrontier
Deal found 23/1$481
Wed 30/422:40ONT - JFK
Nonstop5h 20mJetBlue
Wed 7/518:10JFK - ONT
Nonstop6h 12mJetBlue
Deal found 22/1$489
Wed 5/206:00ONT - JFK
1 stop7h 59mAmerican Airlines
Fri 7/215:59JFK - ONT
1 stop9h 46mAmerican Airlines
Deal found 22/1$622
Wed 26/306:00ONT - LAS
1 stop8h 44mUnited Airlines
Mon 31/318:58LAS - ONT
2 stops16h 07mUnited Airlines
Deal found 22/1$705

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 23 January 2025. In the last 7 days, Cheapflights users made a total of 647,157 searches

Fly to

Any airport

Route

Depart

Return

Price

OntarioLas Vegas

ONT - LAS

ONTLAS

Ontario

Thu 3/4

19:50-23:15

1 stop3h 25m

Las Vegas Harry Reid Intl

Fri 4/4

05:20-09:35

1 stop4h 15m

$340

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Mon 24/3

06:55-09:19

Nonstop2h 24m

Portland

Sun 30/3

21:41-23:59

Nonstop2h 18m

$346

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Sat 22/2

06:00-12:28

1 stop6h 28m

Portland

Sun 23/2

19:11-23:51

1 stop4h 40m

$348

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Tue 25/3

06:15-12:50

1 stop6h 35m

Portland

Sat 29/3

06:05-16:20

2 stops10h 15m

$354

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Tue 25/3

06:00-12:37

1 stop6h 37m

Portland

Tue 1/4

13:39-20:21

1 stop6h 42m

$418

OntarioNew York

ONT - JFK

ONTJFK

Ontario

Thu 6/2

13:21-00:13

1 stop7h 52m

New York John F Kennedy Intl

Mon 10/2

06:00-11:50

1 stop8h 50m

$442

OntarioNew York

ONT - JFK

ONTJFK

Ontario

Tue 25/2

06:00-19:29

1 stop10h 29m

New York John F Kennedy Intl

Fri 28/2

16:00-23:24

1 stop10h 24m

$457

OntarioLas Vegas

ONT - LAS

ONTLAS

Ontario

Sun 9/3

07:00-21:27

1 stop14h 27m

Las Vegas Harry Reid Intl

Wed 12/3

06:20-16:59

2 stops10h 39m

$475

OntarioNew York

ONT - JFK

ONTJFK

Ontario

Wed 9/4

14:43-05:30

1 stop11h 47m

New York John F Kennedy Intl

Tue 15/4

06:59-15:04

1 stop11h 05m

$481

OntarioNew York

ONT - JFK

ONTJFK

Ontario

Wed 30/4

22:40-07:00

Nonstop5h 20m

New York John F Kennedy Intl

Wed 7/5

18:10-21:22

Nonstop6h 12m

$489

Flights are sorted by cheapest return flights first.

Deals found on 22/1

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 $784). Flying from Ontario in December will prove the most costly (average of $1,403). 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?

Ontario offers frequent flights to Seattle (72 flights per day), Dallas (72 flights per day) and Phoenix (63 flights per day).

Denver Intl

Denver Intl

From $68

What is the cheapest place to fly to from Ontario?

The cheapest city to fly to from Ontario is Denver Intl, with prices starting at $108. Explore other affordable destinations below.

Denver Intl

Denver Intl

From $68

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 647,157 searches.
Japan Airlines
8.3
Very Good
1,446 reviews
Check prices

Overall

8.3

Food

7.7

Entertainment

7.8

Boarding

8.4

Crew

8.7

Comfort

8.2

Reviews

1 / 10

Excellent crew, great food and decent audio selection. Seats are wide and have plenty of leg room but could use some more padding.

Japan Airlines
8.3
Very Good
1,446 reviews
Japan Airlines
8.3
Very Good
1,446 reviews
Check prices

Overall

8.3

Food

7.7

Entertainment

7.8

Boarding

8.4

Crew

8.7

Comfort

8.2

Reviews

1 / 10

Excellent crew, great food and decent audio selection. Seats are wide and have plenty of leg room but could use some more padding.

Asiana Airlines
8.3
Very Good
466 reviews
Japan Airlines
8.3
Very Good
1,446 reviews
Check prices

Overall

8.3

Food

7.7

Entertainment

7.8

Boarding

8.4

Crew

8.7

Comfort

8.2

Reviews

1 / 10

Excellent crew, great food and decent audio selection. Seats are wide and have plenty of leg room but could use some more padding.

China Airlines
8.2
Very Good
732 reviews
Japan Airlines
8.3
Very Good
1,446 reviews
Check prices

Overall

8.3

Food

7.7

Entertainment

7.8

Boarding

8.4

Crew

8.7

Comfort

8.2

Reviews

1 / 10

Excellent crew, great food and decent audio selection. Seats are wide and have plenty of leg room but could use some more padding.

Alaska Airlines
8.0
Very Good
9,699 reviews
Japan Airlines
8.3
Very Good
1,446 reviews
Check prices

Overall

8.3

Food

7.7

Entertainment

7.8

Boarding

8.4

Crew

8.7

Comfort

8.2

Reviews

1 / 10

Excellent crew, great food and decent audio selection. Seats are wide and have plenty of leg room but could use some more padding.

Hawaiian Airlines
7.9
Good
2,332 reviews
Japan Airlines
8.3
Very Good
1,446 reviews
Check prices

Overall

8.3

Food

7.7

Entertainment

7.8

Boarding

8.4

Crew

8.7

Comfort

8.2

Reviews

1 / 10

Excellent crew, great food and decent audio selection. Seats are wide and have plenty of leg room but could use some more padding.

Browse thousands of different options on Cheapflights for your next trip

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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 23 January 2025.

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

    For the current month, the most popular flights from Ontario are Guadalajara, Dallas/Fort Worth Airport, Denver. Dallas/Fort Worth Airport, Denver, Guadalajara are the most popular locations from Ontario year round.

  • What is the cheapest flight from Ontario to anywhere?

    Users have flown out of Ontario for as low as $108 to Denver (prices may vary depending on the airline and departure time). On average, users have booked flights for $114 to fly from Ontario.

  • What is the cheapest month to fly from Ontario?

    Currently, the cheapest month for flights from Ontario is April. The most expensive month for flights is December. The cheapest prices are shown above but prices will vary according to departure times, airlines, class and how early you book.

  • Where are the cheapest places to fly to from Ontario?

    View the cheapest flight destinations from Ontario:
    Fly from Ontario to Sydney from $1,353 round trip
    Fly from Ontario to Melbourne from $1,538 round trip

  • How does Cheapflights help users find flights from Ontario?

    Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Ontario. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

  • Why should you use Cheapflights to find cheap flight tickets from Ontario?

    It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from Ontario.

  • Can Cheapflights find flights from Ontario with no change fees?

    Certainly. Search results for flights from Ontario shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

  • Can Cheapflights notify me if prices for flights from Ontario become cheaper?

    Yes, Cheapflights has a feature called Price Alerts, which offers users the ability to be notified when flight prices change. Track prices for your flight from Ontario today and book when you’re ready!

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?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Ontario. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

Why should you use Cheapflights to find cheap flight tickets from Ontario?

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from Ontario.

Can Cheapflights find flights from Ontario with no change fees?

Certainly. Search results for flights from Ontario shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

Can Cheapflights notify me if prices for flights from Ontario become cheaper?

Yes, Cheapflights has a feature called Price Alerts, which offers users the ability to be notified when flight prices change. Track prices for your flight from Ontario today and book when you’re ready!

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