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$83+ 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 9/4. 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
30 Mar — 6 Apr1
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 25 March 2025.

Cheapest one-way flight

$42

Cheapest round-trip flight

$68

Cheapest airline

American Airlines

Most popular destination

Sydney Kingsford Smith (SYD)

Good round-trip deal

$1,739 or less

Good one-way deal

$114 or less
The cheapest one-way flight from Ontario is currently to Las Vegas Harry Reid Intl.
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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 $223).
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Sydney Kingsford Smith (SYD) is currently the most popular flight destination from Ontario (average return price of $829).
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Price to beat on a round-trip flight from Ontario.
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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 25 March 2025.

Tue 13/510:44ONT - LAS
Nonstop1h 12mFrontier
Fri 16/512:05LAS - ONT
Nonstop1h 11mFrontier
Deal found 25/3$126
Tue 6/515:40ONT - LAS
Nonstop1h 05mSouthwest
Tue 6/519:05LAS - ONT
Nonstop1h 05mSouthwest
Deal found 25/3$154
Wed 23/420:59ONT - PDX
Nonstop2h 21mAlaska Airlines
Wed 30/421:42PDX - ONT
Nonstop2h 16mAlaska Airlines
Deal found 24/3$282
Wed 23/406:20ONT - PDX
1 stop4h 05mSouthwest
Wed 30/413:40PDX - ONT
2 stops6h 30mSouthwest
Deal found 24/3$321
Sat 19/405:45ONT - PDX
1 stop7h 30mDelta
Sun 20/417:15PDX - ONT
1 stop5h 28mDelta
Deal found 25/3$345
Tue 6/522:59ONT - JFK
Nonstop5h 20mJetBlue
Tue 13/518:00JFK - ONT
Nonstop6h 11mJetBlue
Deal found 24/3$387
Thu 8/513:45ONT - PDX
1 stop4h 32mUnited Airlines
Tue 20/507:54PDX - ONT
1 stop6h 31mUnited Airlines
Deal found 24/3$409
Fri 2/516:29ONT - JFK
1 stop10h 31mHawaiian Airlines
Wed 7/507:20JFK - ONT
1 stop11h 12mHawaiian Airlines
Deal found 24/3$439
Wed 16/412:07ONT - JFK
1 stop7h 23mDelta
Sat 26/410:00JFK - ONT
1 stop9h 33mDelta
Deal found 25/3$441
Sat 10/516:29ONT - JFK
1 stop10h 31mAlaska Airlines
Wed 14/507:20JFK - ONT
1 stop11h 12mAlaska Airlines
Deal found 24/3$471
Wed 16/406:55ONT - LAS
2 stops13h 31mAlaska Airlines
Wed 23/410:08LAS - ONT
1 stop10h 21mAlaska Airlines
Deal found 23/3$506
Sat 3/509:55ONT - DCA
1 stop8h 00mSouthwest
Wed 7/516:25DCA - ONT
2 stops8h 20mSouthwest
Deal found 25/3$512

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

Fly to

Sydney

Route

Depart

Return

Price

OntarioLas Vegas

ONT - LAS

ONTLAS

Ontario

Tue 13/5

10:44-11:56

Nonstop1h 12m

Las Vegas Harry Reid Intl

Thu 15/5

00:59-11:26

1 stop10h 27m

$304

OntarioLas Vegas

ONT - LAS

ONTLAS

Ontario

Thu 17/4

21:05-22:10

Nonstop1h 05m

Las Vegas Harry Reid Intl

Sun 20/4

22:45-23:45

Nonstop1h 00m

$307

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Thu 17/4

07:00-09:24

Nonstop2h 24m

Portland

Tue 22/4

14:30-20:29

1 stop5h 59m

$313

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Wed 23/4

06:20-10:25

1 stop4h 05m

Portland

Wed 30/4

13:40-20:10

2 stops6h 30m

$321

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Thu 24/4

14:35-20:49

1 stop6h 14m

Portland

Sun 27/4

07:23-13:55

1 stop6h 32m

$329

OntarioNew York

ONT - JFK

ONTJFK

Ontario

Tue 6/5

22:59-07:19

Nonstop5h 20m

New York John F Kennedy Intl

Tue 13/5

18:00-21:11

Nonstop6h 11m

$387

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Thu 8/5

13:45-18:17

1 stop4h 32m

Portland

Tue 13/5

07:54-14:25

1 stop6h 31m

$409

OntarioNew York

ONT - JFK

ONTJFK

Ontario

Fri 2/5

16:29-06:00

1 stop10h 31m

New York John F Kennedy Intl

Wed 7/5

07:20-15:32

1 stop11h 12m

$439

OntarioNew York

ONT - JFK

ONTJFK

Ontario

Wed 16/4

12:07-22:30

1 stop7h 23m

New York John F Kennedy Intl

Sat 26/4

10:00-16:33

1 stop9h 33m

$441

OntarioNew York

ONT - JFK

ONTJFK

Ontario

Sat 10/5

16:29-06:00

1 stop10h 31m

New York John F Kennedy Intl

Wed 14/5

07:20-15:32

1 stop11h 12m

$471

Flights are sorted by cheapest return flights first.

Deals found on 24/3

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 $783). Flying from Ontario in December will prove the most costly (average of $1,406). 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 (113 flights per day), Dallas (103 flights per day) and Denver (63 flights per day).

Taipei City Taiwan Taoyuan Intl

Taipei City Taiwan Taoyuan Intl

From $1,079

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

Taipei City Taiwan Taoyuan Intl

Taipei City Taiwan Taoyuan Intl

From $1,079

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.
China Airlines
8.2
Very Good
722 reviews
Check prices

Food

7.8

Overall

8.2

Crew

8.5

Entertainment

8.0

Boarding

8.3

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

Sopharith,Feb 2025

TPE - PNH

All are excellence, but we had to pay 150$ extra charge each person with our names in passports and tickets. It was just swiping between first names and last names. It might be our mistake when we bought the tickets, but I thought it was expensive just to swipe the names. Anyway, thanks a lot. All excellence
China Airlines
8.2
Very Good
722 reviews
China Airlines
8.2
Very Good
722 reviews
Check prices

Food

7.8

Overall

8.2

Crew

8.5

Entertainment

8.0

Boarding

8.3

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

Sopharith,Feb 2025

TPE - PNH

All are excellence, but we had to pay 150$ extra charge each person with our names in passports and tickets. It was just swiping between first names and last names. It might be our mistake when we bought the tickets, but I thought it was expensive just to swipe the names. Anyway, thanks a lot. All excellence
Alaska Airlines
8.0
Very Good
9,789 reviews
China Airlines
8.2
Very Good
722 reviews
Check prices

Food

7.8

Overall

8.2

Crew

8.5

Entertainment

8.0

Boarding

8.3

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

Sopharith,Feb 2025

TPE - PNH

All are excellence, but we had to pay 150$ extra charge each person with our names in passports and tickets. It was just swiping between first names and last names. It might be our mistake when we bought the tickets, but I thought it was expensive just to swipe the names. Anyway, thanks a lot. All excellence
Hawaiian Airlines
7.9
Good
2,330 reviews
China Airlines
8.2
Very Good
722 reviews
Check prices

Food

7.8

Overall

8.2

Crew

8.5

Entertainment

8.0

Boarding

8.3

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

Sopharith,Feb 2025

TPE - PNH

All are excellence, but we had to pay 150$ extra charge each person with our names in passports and tickets. It was just swiping between first names and last names. It might be our mistake when we bought the tickets, but I thought it was expensive just to swipe the names. Anyway, thanks a lot. All excellence
Qatar Airways
7.4
Good
3,539 reviews
China Airlines
8.2
Very Good
722 reviews
Check prices

Food

7.8

Overall

8.2

Crew

8.5

Entertainment

8.0

Boarding

8.3

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

Sopharith,Feb 2025

TPE - PNH

All are excellence, but we had to pay 150$ extra charge each person with our names in passports and tickets. It was just swiping between first names and last names. It might be our mistake when we bought the tickets, but I thought it was expensive just to swipe the names. Anyway, thanks a lot. All excellence
United Airlines
7.4
Good
8,605 reviews
China Airlines
8.2
Very Good
722 reviews
Check prices

Food

7.8

Overall

8.2

Crew

8.5

Entertainment

8.0

Boarding

8.3

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

Sopharith,Feb 2025

TPE - PNH

All are excellence, but we had to pay 150$ extra charge each person with our names in passports and tickets. It was just swiping between first names and last names. It might be our mistake when we bought the tickets, but I thought it was expensive just to swipe the names. Anyway, thanks a lot. All excellence

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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 25 March 2025.

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

    For the current month, the most popular flights from Ontario are Dallas/Fort Worth Airport, Denver, Guadalajara. Denver, Dallas/Fort Worth Airport, 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 $927 to fly from Ontario.

  • What is the cheapest first class flight from Ontario?

    If you’re looking to fly first-class from Ontario to anywhere, put Denver on your list as prices start at $1,961 for this destination.

  • 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 $1,826 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!

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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?

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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