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$90+ 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 2/5. 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 — SYD
20 Apr — 27 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 15 April 2025.

Cheapest one-way flight

$45

Cheapest round-trip flight

$103

Cheapest airline

American Airlines

Most popular destination

Sydney Kingsford Smith (SYD)

Good round-trip deal

$1,731 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 Toronto Pearson Intl.
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On average, American Airlines currently has the cheapest one-way flight from Ontario (avg. price of $218).
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Sydney Kingsford Smith (SYD) is currently the most popular flight destination from Ontario (average return price of $1,031).
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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 15 April 2025.

Wed 9/716:25ONT - LAS
Nonstop1h 10mSouthwest
Wed 16/707:10LAS - ONT
Nonstop1h 00mSouthwest
Deal found 14/4$154
Tue 13/507:00ONT - PDX
Nonstop2h 26mAlaska Airlines
Tue 20/521:41PDX - ONT
Nonstop2h 16mAlaska Airlines
Deal found 14/4$280
Wed 28/519:37ONT - LAS
Nonstop1h 02mFrontier
Sun 1/619:45LAS - ONT
Nonstop1h 06mFrontier
Deal found 14/4$296
Wed 14/511:00ONT - PDX
1 stop4h 20mSouthwest
Wed 21/513:40PDX - ONT
2 stops6h 30mSouthwest
Deal found 14/4$320
Sat 31/513:36ONT - PDX
1 stop7h 11mUnited Airlines
Mon 2/613:25PDX - ONT
1 stop4h 14mUnited Airlines
Deal found 15/4$323
Thu 15/517:55ONT - PDX
Nonstop2h 31mHawaiian Airlines
Mon 19/521:41PDX - ONT
Nonstop2h 16mHawaiian Airlines
Deal found 14/4$407
Fri 6/619:05ONT - PDX
1 stop5h 05mDelta
Mon 9/608:55PDX - ONT
1 stop4h 56mDelta
Deal found 14/4$409
Sat 24/522:59ONT - JFK
Nonstop5h 20mJetBlue
Fri 30/518:00JFK - ONT
Nonstop6h 11mJetBlue
Deal found 14/4$423
Wed 30/416:29ONT - JFK
1 stop10h 31mAlaska Airlines
Tue 6/507:20JFK - ONT
1 stop11h 12mAlaska Airlines
Deal found 14/4$426
Fri 30/511:44ONT - JFK
1 stop9h 51mDelta
Tue 10/606:00JFK - ONT
1 stop7h 38mDelta
Deal found 14/4$447
Thu 1/518:35ONT - JFK
1 stop7h 55mFrontier
Thu 15/506:59JFK - ONT
1 stop27h 25mFrontier
Deal found 14/4$491
Tue 6/506:00ONT - LAS
2 stops11h 10mAlaska Airlines
Tue 13/507:20LAS - ONT
2 stops8h 12mAlaska Airlines
Deal found 15/4$496

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

Fly to

Sydney

Route

Depart

Return

Price

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Tue 13/5

06:00-10:52

1 stop4h 52m

Portland

Sat 17/5

21:41-23:57

Nonstop2h 16m

$296

OntarioLas Vegas

ONT - LAS

ONTLAS

Ontario

Wed 28/5

19:37-20:39

Nonstop1h 02m

Las Vegas Harry Reid Intl

Sun 1/6

19:45-20:51

Nonstop1h 06m

$296

OntarioLas Vegas

ONT - LAS

ONTLAS

Ontario

Tue 13/5

11:00-16:15

2 stops5h 15m

Las Vegas Harry Reid Intl

Tue 20/5

06:10-10:10

1 stop4h 00m

$298

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Wed 14/5

11:00-15:20

1 stop4h 20m

Portland

Wed 21/5

13:40-20:10

2 stops6h 30m

$320

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Sat 31/5

13:36-20:47

1 stop7h 11m

Portland

Mon 2/6

13:25-17:39

1 stop4h 14m

$323

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Thu 15/5

10:00-12:22

Nonstop2h 22m

Portland

Mon 19/5

21:41-23:57

Nonstop2h 16m

$407

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Fri 6/6

19:05-00:10

1 stop5h 05m

Portland

Mon 9/6

08:55-13:51

1 stop4h 56m

$409

OntarioNew York

ONT - JFK

ONTJFK

Ontario

Sat 24/5

22:59-07:19

Nonstop5h 20m

New York John F Kennedy Intl

Fri 30/5

18:00-21:11

Nonstop6h 11m

$423

OntarioNew York

ONT - JFK

ONTJFK

Ontario

Wed 30/4

16:29-06:00

1 stop10h 31m

New York John F Kennedy Intl

Tue 6/5

07:20-15:32

1 stop11h 12m

$426

OntarioNew York

ONT - JFK

ONTJFK

Ontario

Fri 30/5

11:44-00:35

1 stop9h 51m

New York John F Kennedy Intl

Tue 10/6

06:00-10:38

1 stop7h 38m

$447

Flights are sorted by cheapest return flights first.

Deals found on 15/4

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 $1,401). 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 Dallas (125 flights per day), Seattle (121 flights per day) and San Francisco (82 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 $107. 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
729 reviews
Check prices

Comfort

8.0

Food

7.8

Crew

8.5

Entertainment

8.0

Overall

8.2

Boarding

8.3

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2025

YVR - TPE

I like the system, but the problem is the food , thre is no option, as a chef i don't recommend the food is worst we keep our hungry until taipe from vancouver
China Airlines
8.2
Very Good
729 reviews
China Airlines
8.2
Very Good
729 reviews
Check prices

Comfort

8.0

Food

7.8

Crew

8.5

Entertainment

8.0

Overall

8.2

Boarding

8.3

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2025

YVR - TPE

I like the system, but the problem is the food , thre is no option, as a chef i don't recommend the food is worst we keep our hungry until taipe from vancouver
Alaska Airlines
8.0
Very Good
9,871 reviews
China Airlines
8.2
Very Good
729 reviews
Check prices

Comfort

8.0

Food

7.8

Crew

8.5

Entertainment

8.0

Overall

8.2

Boarding

8.3

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2025

YVR - TPE

I like the system, but the problem is the food , thre is no option, as a chef i don't recommend the food is worst we keep our hungry until taipe from vancouver
Hawaiian Airlines
7.9
Good
2,375 reviews
China Airlines
8.2
Very Good
729 reviews
Check prices

Comfort

8.0

Food

7.8

Crew

8.5

Entertainment

8.0

Overall

8.2

Boarding

8.3

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2025

YVR - TPE

I like the system, but the problem is the food , thre is no option, as a chef i don't recommend the food is worst we keep our hungry until taipe from vancouver
United Airlines
7.4
Good
8,656 reviews
China Airlines
8.2
Very Good
729 reviews
Check prices

Comfort

8.0

Food

7.8

Crew

8.5

Entertainment

8.0

Overall

8.2

Boarding

8.3

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2025

YVR - TPE

I like the system, but the problem is the food , thre is no option, as a chef i don't recommend the food is worst we keep our hungry until taipe from vancouver
American Airlines
7.2
Good
10,000 reviews
China Airlines
8.2
Very Good
729 reviews
Check prices

Comfort

8.0

Food

7.8

Crew

8.5

Entertainment

8.0

Overall

8.2

Boarding

8.3

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2025

YVR - TPE

I like the system, but the problem is the food , thre is no option, as a chef i don't recommend the food is worst we keep our hungry until taipe from vancouver

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 15 April 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, Honolulu. 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 $107 to Denver (prices may vary depending on the airline and departure time). On average, users have booked flights for $922 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 $1,952 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 $1,697 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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