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$167+ 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 15/4. 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 — LHR
21 Apr — 28 Apr1
1 adult
1 adult, Economy, 0 bags

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 22 March 2026. In the last 7 days, Cheapflights users made a total of 647,157 searches

Fly to

Route

Depart

Return

Price

Cheapest return flight

OntarioNew York

ONT - JFK

ONTJFK

Ontario

Tue 7/4

19:08-07:12

1 stop9h 04m

New York John F Kennedy Intl

Tue 14/4

16:29-23:59

1 stop10h 30m

$476

OntarioNewark

ONT - EWR

ONTEWR

Ontario

Wed 15/4

10:33-23:11

1 stop9h 38m

Newark

Wed 22/4

15:30-22:32

1 stop10h 02m

$554

OntarioNewark

ONT - EWR

ONTEWR

Ontario

Wed 22/4

10:39-23:29

1 stop9h 50m

Newark

Fri 24/4

15:30-23:59

1 stop11h 29m

$554

OntarioNewark

ONT - EWR

ONTEWR

Ontario

Wed 29/4

15:26-06:39

1 stop12h 13m

Newark

Tue 5/5

07:29-14:32

1 stop10h 03m

$554

OntarioNew York

ONT - JFK

ONTJFK

Ontario

Fri 14/8

22:59-09:50

1 stop7h 51m

New York John F Kennedy Intl

Sun 16/8

10:10-18:01

1 stop10h 51m

$567
Fastest return journey

OntarioNew York

ONT - JFK

ONTJFK

Ontario

Wed 26/8

23:59-08:21

Nonstop5h 22m

New York John F Kennedy Intl

Wed 2/9

19:35-22:40

Nonstop6h 05m

$587

OntarioNewark

ONT - EWR

ONTEWR

Ontario

Fri 8/5

15:26-06:39

1 stop12h 13m

Newark

Wed 13/5

09:30-18:47

1 stop12h 17m

$638

OntarioCleveland

ONT - CLE

ONTCLE

Ontario

Wed 15/4

18:49-09:59

2 stops12h 10m

Cleveland Hopkins Intl

Sat 18/4

12:27-20:36

2 stops11h 09m

$639

OntarioNew York

ONT - JFK

ONTJFK

Ontario

Thu 23/4

19:59-22:59

1 stop24h 00m

New York John F Kennedy Intl

Sat 25/4

07:00-14:32

1 stop10h 32m

$642

OntarioNew York

ONT - JFK

ONTJFK

Ontario

Sun 26/4

10:39-22:59

1 stop9h 20m

New York John F Kennedy Intl

Wed 29/4

07:00-14:32

1 stop10h 32m

$655

Flights are sorted by cheapest return flights first.

Deals found on 19/3

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 is the cheapest month to book a flight from Ontario?

Currently, December is the cheapest month in which you can book a flight from Ontario (average of $668). Flying from Ontario in June will prove the most costly (average of $995). 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 (108 flights per day) and Phoenix (86 flights per day).

Atlanta Hartsfield-Jackson
Atlanta Hartsfield-Jackson
From $325
Oakland
Oakland
From $567
Taipei City Taiwan Taoyuan Intl
Taipei City Taiwan Taoyuan Intl
From $1,536
Las Vegas Harry Reid Intl
Las Vegas Harry Reid Intl
From $223

What is the cheapest place to fly to from Ontario?

The cheapest city to fly to from Ontario is Las Vegas Harry Reid Intl, with prices starting at $223. Explore other affordable destinations below.

Las Vegas Harry Reid Intl
Las Vegas Harry Reid Intl
From $223
Atlanta Hartsfield-Jackson
Atlanta Hartsfield-Jackson
From $325
Oakland
Oakland
From $567
Taipei City Taiwan Taoyuan Intl
Taipei City Taiwan Taoyuan Intl
From $1,536

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 22 March 2026.

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

    For the current month, the most popular flights from Ontario are Las Vegas, Dallas/Fort Worth Airport, Denver. Las Vegas, Dallas/Fort Worth Airport, Denver 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 $223 to Las Vegas (prices may vary depending on the airline and departure time). On average, users have booked flights for $679 to fly from Ontario.

  • What is the cheapest month to fly from Ontario?

    Currently, the cheapest month for flights from Ontario is December. The most expensive month for flights is June. 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 London from $991 round trip
    Fly from Ontario to Sydney from $1,428 round trip
    Fly from Ontario to Melbourne from $1,737 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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