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 many operators does momondo search for flights from Ontario Airport to Islip Long Island Airport?

As of July 2026, there is 1 operator available to choose from for flights from Ontario Airport to Islip Long Island Airport.

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.

$194 Cheap Flights from Ontario to Islip, New York in 2026

Find the cheapest flights from Ontario to New York

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

7:35 am - 9:45 pm

ONT

ISP

11h 10m

2 stops

12:20 pm - 9:00 pm

ISP

ONT

11h 40m

2 stops

$311Southwest

Sat, Oct 17 - Sat, Oct 24

9:55 am - 11:30 pm

ONT

ISP

10h 35m

2 stops

6:00 am - 3:05 pm

ISP

ONT

12h 05m

2 stops

$394Southwest

Fri, Nov 6 - Tue, Nov 10

7:00 am - 9:05 pm

ONT

ISP

11h 05m

2 stops

6:10 am - 2:00 pm

ISP

ONT

10h 50m

2 stops

$425Southwest

Tue, Aug 11 - Mon, Aug 17

6:30 pm - 8:20 am

ONT

ISP

10h 50m

2 stops

6:05 am - 1:10 pm

ISP

ONT

10h 05m

2 stops

$597Southwest

Thu, Jul 30 - Tue, Aug 4

9:40 pm - 8:20 am

ONT

ISP

7h 40m

1 stop

6:05 am - 1:10 pm

ISP

ONT

10h 05m

2 stops

$652Southwest

Thu, Jul 30 - Tue, Aug 4

7:13 pm - 8:15 pm

ONT

ISP

22h 02m

2 stops

7:31 am - 8:01 pm

ISP

ONT

15h 30m

2 stops

$945Multiple Airlines

Sun, Sep 13 - Tue, Sep 22

6:39 pm - 10:56 am

ONT

ISP

13h 17m

2 stops

10:05 am - 10:59 pm

ISP

ONT

15h 54m

2 stops

$1,000Multiple Airlines

Wed, Jul 29 - Mon, Aug 24

9:00 am - 10:58 am

ONT

ISP

22h 58m

3 stops

4:33 pm - 8:06 pm

ISP

ONT

30h 33m

2 stops

$1,057Multiple Airlines

Fri, Nov 6 - Tue, Nov 10

11:59 pm - 3:21 pm

ONT

ISP

12h 22m

2 stops

7:30 am - 9:09 pm

ISP

ONT

16h 39m

2 stops

$1,110Multiple Airlines

Mon, Dec 28 - Mon, Jan 4

8:03 am - 7:45 pm

ONT

ISP

32h 42m

3 stops

9:59 am - 8:58 pm

ISP

ONT

13h 59m

2 stops

$1,199Multiple Airlines

Sat, Oct 17 - Sat, Oct 24

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Southwest flights from Ontario to Islip, New York

Our best Southwest deals on Ontario to Islip, New York flight tickets

Southwest

Oct 17

ONT7:35 amOntario

11h 10m

2 stops

ISP9:45 pmIslip Long Island

Oct 24

ISP12:20 pmIslip Long Island

11h 40m

2 stops

ONT9:00 pmOntario

$311

Southwest

Nov 6

ONT9:55 amOntario

10h 35m

2 stops

ISP11:30 pmIslip Long Island

Nov 10

ISP6:00 amIslip Long Island

12h 05m

2 stops

ONT3:05 pmOntario

$394

Southwest

Aug 11

ONT7:00 amOntario

11h 05m

2 stops

ISP9:05 pmIslip Long Island

Aug 17

ISP6:10 amIslip Long Island

10h 50m

2 stops

ONT2:00 pmOntario

$425

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioIslip

ONT - ISP

ONTISP

Ontario

Sat 10/17

7:35 am-9:45 pm

2 stops11h 10m

Islip Long Island

Sat 10/24

12:20 pm-9:00 pm

2 stops11h 40m

$311

OntarioIslip

ONT - ISP

ONTISP

Ontario

Fri 11/6

9:55 am-11:30 pm

2 stops10h 35m

Islip Long Island

Tue 11/10

6:00 am-3:05 pm

2 stops12h 05m

$394

OntarioIslip

ONT - ISP

ONTISP

Ontario

Tue 8/11

7:00 am-9:05 pm

2 stops11h 05m

Islip Long Island

Mon 8/17

6:10 am-2:00 pm

2 stops10h 50m

$425

OntarioIslip

ONT - ISP

ONTISP

Ontario

Thu 7/30

6:30 pm-8:20 am

2 stops10h 50m

Islip Long Island

Tue 8/4

6:05 am-1:10 pm

2 stops10h 05m

$597

Quickest round-trip

OntarioIslip

ONT - ISP

ONTISP

Ontario

Thu 7/30

9:40 pm-8:20 am

1 stop7h 40m

Islip Long Island

Tue 8/4

6:05 am-1:10 pm

2 stops10h 05m

$652

OntarioIslip

ONT - ISP

ONTISP

Ontario

Sun 9/13

7:13 pm-8:15 pm

2 stops22h 02m

Islip Long Island

Tue 9/22

7:31 am-8:01 pm

2 stops15h 30m

$945

OntarioIslip

ONT - ISP

ONTISP

Ontario

Wed 7/29

6:39 pm-10:56 am

2 stops13h 17m

Islip Long Island

Mon 8/24

10:05 am-10:59 pm

2 stops15h 54m

$1,000

OntarioIslip

ONT - ISP

ONTISP

Ontario

Fri 11/6

9:00 am-10:58 am

3 stops22h 58m

Islip Long Island

Tue 11/10

4:33 pm-8:06 pm

2 stops30h 33m

$1,057

OntarioIslip

ONT - ISP

ONTISP

Ontario

Mon 12/28

11:59 pm-3:21 pm

2 stops12h 22m

Islip Long Island

Mon 1/4

7:30 am-9:09 pm

2 stops16h 39m

$1,110

OntarioIslip

ONT - ISP

ONTISP

Ontario

Sat 10/17

8:03 am-7:45 pm

3 stops32h 42m

Islip Long Island

Sat 10/24

9:59 am-8:58 pm

2 stops13h 59m

$1,199

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Ontario to Islip, New York

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 airline that flies from Ontario to Islip Long Island?

Frontier is the most popular carrier operating from Ontario to Islip Long Island

What airlines fly to Islip, New York?

JetBlue, United Airlines and American Airlines are the top three most popular airlines that fly to Islip, New York from Ontario according to our data. JetBlue is the first choice among our users, with 38% of people opting to fly with this airline when traveling to Islip, New York. Keep in mind that there are 9 different airlines that fly to Islip, New York on a routine basis, so you have a few additional options to choose from.

When to book flights from Ontario to Islip, New York

Are you open to changing your travel dates? Check out the ideal times to fly from Ontario to Islip, New York according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

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

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

Fastest flight time	7h 40m
Direct flights	None

The fastest flight from Ontario to Islip, New York takes 7h 40m

There are no direct flights from Ontario to Islip, New York. There are no popular flight routes from Ontario to Islip, New York.

Search flight deals

Frequently asked questions about flying from Ontario to Islip, New York

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 7h 40m, 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 many operators does momondo search for flights from Ontario Airport to Islip Long Island Airport?
As of July 2026, there is 1 operator available to choose from for flights from Ontario Airport to Islip Long Island Airport.
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.
What is the most popular airline from Ontario to Islip, New York?
momondo data reveals that the most frequently booked airline on the route from Ontario to Islip, New York is Southwest, representing 100% of all bookings.

Best airlines flying from Ontario to Islip, New York

Compare and see reviews for airlines that fly from Ontario to Islip, New York with momondo

Airline	Rating	Free Cancellation	Price
Southwest	PriceFrom $396	Free Cancellation	Rating 8.0 4,246 reviews		Search Southwest flights

Montauk

Riverhead

Southampton

Sag Harbor

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.

An easier way to manage your Islip, New York trip

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Cheap flights from Ontario to New York from $194

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 8/13. 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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Southwest flights from Ontario to Islip, New York

Our best Southwest deals on Ontario to Islip, New York flight tickets

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How to get the cheapest flight ticket from Ontario to Islip, New York

What is the cheapest airline that flies from Ontario to Islip Long Island?

What airlines fly to Islip, New York?

When to book flights from Ontario to Islip, New York

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

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

Fastest flight time

Direct flights

Frequently asked questions about flying from Ontario to Islip, New York

Best airlines flying from Ontario to Islip, New York

Compare and see reviews for airlines that fly from Ontario to Islip, New York with momondo

Traveling to a place near New York?

Why use momondo?

An easier way to manage your Islip, New York trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to the United States

Airports servicing New York

Fly your favorite airline to New York

Airlines are sorted and displayed according to clicks in the past 7 days on momondo

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List of cabin classes available on flights landing in New York. Availability may vary depending on flight origin and airline.

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