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Cheap flights from Ontario to New York from $213

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ontario to New York departing on 12/22. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Ontario to New York

Cheap round-trip flights

Frontier Logo
12:32 pm - 10:37 amONT-ISP
19h 05m2 stops
Frontier Logo
9:47 pm - 4:28 pmISP-ONT
21h 41m2 stops
$220Frontier
Find Deal
Thu, Oct 23 - Sun, Oct 26
Frontier Logo
8:24 am - 10:37 amONT-ISP
23h 13m2 stops
Frontier Logo
9:27 pm - 6:49 pmISP-ONT
24h 22m2 stops
$222Frontier
Find Deal
Fri, Oct 31 - Sun, Nov 2
Frontier Logo
8:34 am - 10:37 amONT-ISP
23h 03m2 stops
Frontier Logo
9:47 pm - 4:28 pmISP-ONT
21h 41m2 stops
$232Frontier
Find Deal
Fri, Oct 17 - Sun, Oct 19
Frontier Logo
12:32 pm - 10:37 amONT-ISP
19h 05m2 stops
Frontier Logo
9:47 pm - 4:28 pmISP-ONT
21h 41m2 stops
$235Frontier
Find Deal
Thu, Oct 23 - Sun, Oct 26
Frontier Logo
8:24 am - 10:37 amONT-ISP
23h 13m2 stops
Frontier Logo
9:27 pm - 6:49 pmISP-ONT
24h 22m2 stops
$237Frontier
Find Deal
Fri, Oct 31 - Sun, Nov 2
Frontier Logo
7:04 am - 9:07 amONT-ISP
23h 03m2 stops
Frontier Logo
9:49 am - 11:50 pmISP-ONT
41h 01m2 stops
$257Frontier
Find Deal
Sat, Oct 25 - Mon, Oct 27
Frontier Logo
12:32 pm - 10:37 amONT-ISP
19h 05m2 stops
Frontier Logo
9:47 pm - 4:28 pmISP-ONT
21h 41m2 stops
$262Frontier
Find Deal
Fri, Oct 10 - Sun, Oct 12
Frontier Logo
12:32 pm - 10:37 amONT-ISP
19h 05m2 stops
Frontier Logo
9:47 pm - 4:28 pmISP-ONT
21h 41m2 stops
$266Frontier
Find Deal
Fri, Oct 24 - Sun, Oct 26
Southwest Logo
7:45 am - 9:35 pmONT-ISP
10h 50m2 stops
Southwest Logo
5:35 pm - 10:50 pmISP-ONT
8h 15m1 stop
$378Southwest
Find Deal
Sat, Oct 25 - Mon, Oct 27
Multiple Airlines Logo
5:05 am - 11:04 amONT-ISP
26h 59m2 stops
Multiple Airlines Logo
12:40 pm - 10:51 pmISP-ONT
37h 11m3 stops
$971Multiple Airlines
Find Deal
Sat, Oct 25 - Mon, Oct 27

Frontier flights from Ontario to Islip

Our best Frontier deals on Ontario to Islip flight tickets
Frontier
Oct 23
ONT12:32 pmOntario
19h 05m
2 stops
ISP10:37 amIslip Long Island
Oct 26
ISP9:47 pmIslip Long Island
21h 41m
2 stops
ONT4:28 pmOntario
$220
Find similar
Frontier
Oct 31
ONT8:24 amOntario
23h 13m
2 stops
ISP10:37 amIslip Long Island
Nov 2
ISP9:27 pmIslip Long Island
24h 22m
2 stops
ONT6:49 pmOntario
$222
Find similar
Frontier
Oct 17
ONT8:34 amOntario
23h 03m
2 stops
ISP10:37 amIslip Long Island
Oct 19
ISP9:47 pmIslip Long Island
21h 41m
2 stops
ONT4:28 pmOntario
$232
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Ontario to Islip that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated September 25, 2025.
Use the filters below to find and compare flights from Ontario to Islip that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

OntarioIslip

ONT - ISP

ONTISP

Ontario

Thu 10/23

12:32 pm-10:37 am

2 stops19h 05m

Islip Long Island

Sun 10/26

9:47 pm-4:28 pm

2 stops21h 41m

$220

OntarioIslip

ONT - ISP

ONTISP

Ontario

Fri 10/31

8:24 am-10:37 am

2 stops23h 13m

Islip Long Island

Sun 11/2

9:27 pm-6:49 pm

2 stops24h 22m

$222

OntarioIslip

ONT - ISP

ONTISP

Ontario

Fri 10/17

8:34 am-10:37 am

2 stops23h 03m

Islip Long Island

Sun 10/19

9:47 pm-4:28 pm

2 stops21h 41m

$232

OntarioIslip

ONT - ISP

ONTISP

Ontario

Thu 10/23

12:32 pm-10:37 am

2 stops19h 05m

Islip Long Island

Sun 10/26

9:47 pm-4:28 pm

2 stops21h 41m

$235

OntarioIslip

ONT - ISP

ONTISP

Ontario

Fri 10/31

8:24 am-10:37 am

2 stops23h 13m

Islip Long Island

Sun 11/2

9:27 pm-6:49 pm

2 stops24h 22m

$237

OntarioIslip

ONT - ISP

ONTISP

Ontario

Sat 10/25

7:04 am-9:07 am

2 stops23h 03m

Islip Long Island

Mon 10/27

9:49 am-11:50 pm

2 stops41h 01m

$257

OntarioIslip

ONT - ISP

ONTISP

Ontario

Fri 10/10

12:32 pm-10:37 am

2 stops19h 05m

Islip Long Island

Sun 10/12

9:47 pm-4:28 pm

2 stops21h 41m

$262

OntarioIslip

ONT - ISP

ONTISP

Ontario

Fri 10/24

12:32 pm-10:37 am

2 stops19h 05m

Islip Long Island

Sun 10/26

9:47 pm-4:28 pm

2 stops21h 41m

$266

OntarioIslip

ONT - ISP

ONTISP

Ontario

Sat 10/25

7:45 am-9:35 pm

2 stops10h 50m

Islip Long Island

Mon 10/27

5:35 pm-10:50 pm

1 stop8h 15m

$378

OntarioIslip

ONT - ISP

ONTISP

Ontario

Sat 10/25

5:05 am-11:04 am

2 stops26h 59m

Islip Long Island

Mon 10/27

12:40 pm-10:51 pm

3 stops37h 11m

$971

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to New York from

How to get the cheapest flight ticket from Ontario to Islip

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest day to depart on your flight to Islip?

On average, the least expensive day to fly to Islip from Ontario is on a Wednesday. momondo users have found tickets for Wednesday departures for as low as $236. However, this price may fluctuate depending on the airline, the season, and holidays. Flights from Ontario to Islip on a Thursday will generally be more expensive and average around $671. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Islip?

Flying to Islip from Ontario in the evening is the least expensive time of day to depart. momondo users have found prices as low as $382 when looking at flights departing in the evening. Flights in the morning are often more expensive with an average ticket price of $616.

When to book flights from Ontario to Islip

Are you open to changing your travel dates? Check out the ideal times to fly from Ontario to Islip according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Ontario to Islip (ONT to ISP) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Ontario to Islip

Direct flights

None
There are no direct flights from Ontario to Islip. There are no popular flight routes from Ontario to Islip.
Search flight deals

  • How far is Ontario to Islip Long Island by plane?

    Ontario and Islip Long Island are 2454.1 mi apart from one another. Flights usually cover this in 10h 50m, depending on flying conditions and air traffic around both airports.

  • When did momondo last update prices for flights from Ontario Airport to Islip Long Island Airport?

    Prices for flights from Ontario Airport to Islip Long Island Airport were last updated today.

  • How old do you have to be to fly from Ontario Airport to Islip Long Island Airport?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Ontario Airport to Islip Long Island Airport.

  • What documentation or ID do you need to fly to Islip Long Island Airport?

    The travel and health documents required for your trip to Islip Long Island Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Islip Long Island Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Traveling to a place near New York?

Book flights to New York if you plan to visit one of these locations
Montauk
Riverhead
Sag Harbor
Southampton
Amagansett

Why use momondo?

Why should I use momondo to find a flight deal from Ontario to Islip?

It is quick and easy to find Ontario to Islip flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Islip that suits you.

Can I find flights from Ontario to Islip with flexible booking policies on momondo?

momondo does allow users to show only those flights to Islip from Ontario which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from Ontario to Islip?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Islip from Ontario.

I’m not ready to book a flight from Ontario to Islip right now. Can momondo alert me if prices change?

Yes. momondo can track prices for Ontario to Islip flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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