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

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

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

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

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

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Islip Long Island Airport to Illinois.

What documentation or ID do you need to fly to Illinois?

The travel and health documents required for your trip to Illinois 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 Illinois. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

$78 Cheap Flights from Islip to Illinois in 2026

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Find the cheapest flights from Islip, New York to Illinois

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

8:31 pm - 1:09 am

ISP

ORD

29h 38m

1 stop

2:05 pm - 9:13 am

ORD

ISP

18h 08m

1 stop

$182Frontier

Sun, Apr 19 - Thu, Apr 23

8:31 pm - 1:09 am

ISP

ORD

29h 38m

1 stop

2:05 pm - 9:13 am

ORD

ISP

18h 08m

1 stop

$201Frontier

Sun, Apr 19 - Thu, Apr 23

4:07 pm - 1:00 pm

ISP

ORD

21h 53m

1 stop

1:27 pm - 10:05 am

ORD

ISP

43h 38m

2 stops

$203Multiple Airlines

Mon, Apr 27 - Mon, May 4

8:31 pm - 1:09 am

ISP

ORD

29h 38m

1 stop

2:05 pm - 9:13 am

ORD

ISP

18h 08m

1 stop

$223Frontier

Sun, Apr 19 - Thu, Apr 23

8:31 pm - 10:37 am

ISP

ORD

15h 06m

1 stop

4:57 pm - 9:13 am

ORD

ISP

15h 16m

1 stop

$254Frontier

Fri, Apr 17 - Sun, Apr 19

11:00 am - 11:13 pm

ISP

ORD

13h 13m

1 stop

9:42 pm - 10:05 am

ORD

ISP

35h 23m

2 stops

$265Frontier

Fri, May 15 - Mon, May 18

9:00 am - 3:15 pm

ISP

STL

7h 15m

1 stop

6:35 am - 11:55 am

STL

ISP

4h 20m

1 stop

$291Southwest

Tue, Apr 28 - Tue, May 5

6:30 am - 2:50 pm

ISP

STL

9h 20m

2 stops

6:35 am - 1:50 pm

STL

ISP

6h 15m

1 stop

$296Southwest

Tue, Apr 28 - Tue, May 5

6:30 am - 12:50 pm

ISP

STL

7h 20m

2 stops

5:35 am - 1:50 pm

STL

ISP

7h 15m

2 stops

$301Southwest

Tue, Apr 28 - Tue, May 5

5:10 pm - 11:40 pm

ISP

STL

7h 30m

1 stop

1:15 pm - 6:30 pm

STL

ISP

4h 15m

1 stop

$302Southwest

Fri, May 1 - Tue, May 5

Frontier flights from Islip, New York to Illinois

Our best Frontier deals on Islip, New York to Illinois flight tickets

Frontier

Apr 19

ISP8:31 pmIslip Long Island

29h 38m

1 stop

ORD1:09 amChicago O'Hare Intl

Apr 23

ORD2:05 pmChicago O'Hare Intl

18h 08m

1 stop

ISP9:13 amIslip Long Island

$182

Frontier

Apr 19

ISP8:31 pmIslip Long Island

29h 38m

1 stop

ORD1:09 amChicago O'Hare Intl

Apr 23

ORD2:05 pmChicago O'Hare Intl

18h 08m

1 stop

ISP9:13 amIslip Long Island

$201

Frontier

Apr 19

ISP8:31 pmIslip Long Island

29h 38m

1 stop

ORD1:09 amChicago O'Hare Intl

Apr 23

ORD2:05 pmChicago O'Hare Intl

18h 08m

1 stop

ISP9:13 amIslip Long Island

$223

Southwest flights from Islip, New York to Illinois

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

Southwest

Apr 28

ISP9:00 amIslip Long Island

7h 15m

1 stop

STL3:15 pmLambert-St Louis

May 5

STL6:35 amLambert-St Louis

4h 20m

1 stop

ISP11:55 amIslip Long Island

$291

Southwest

Apr 28

ISP6:30 amIslip Long Island

9h 20m

2 stops

STL2:50 pmLambert-St Louis

May 5

STL6:35 amLambert-St Louis

6h 15m

1 stop

ISP1:50 pmIslip Long Island

$296

Southwest

Apr 28

ISP6:30 amIslip Long Island

7h 20m

2 stops

STL12:50 pmLambert-St Louis

May 5

STL5:35 amLambert-St Louis

7h 15m

2 stops

ISP1:50 pmIslip Long Island

$301

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

IslipChicago

ISP - ORD

ISPORD

Islip Long Island

Sun 4/19

8:31 pm-1:09 am

1 stop29h 38m

Chicago O'Hare Intl

Thu 4/23

2:05 pm-9:13 am

1 stop18h 08m

$182

IslipChicago

ISP - ORD

ISPORD

Islip Long Island

Sun 4/19

8:31 pm-1:09 am

1 stop29h 38m

Chicago O'Hare Intl

Thu 4/23

2:05 pm-9:13 am

1 stop18h 08m

$201

IslipChicago

ISP - ORD

ISPORD

Islip Long Island

Mon 4/27

4:07 pm-1:00 pm

1 stop21h 53m

Chicago O'Hare Intl

Mon 5/4

1:27 pm-10:05 am

2 stops43h 38m

$203

IslipChicago

ISP - ORD

ISPORD

Islip Long Island

Sun 4/19

8:31 pm-1:09 am

1 stop29h 38m

Chicago O'Hare Intl

Thu 4/23

2:05 pm-9:13 am

1 stop18h 08m

$223

IslipChicago

ISP - ORD

ISPORD

Islip Long Island

Fri 4/17

8:31 pm-10:37 am

1 stop15h 06m

Chicago O'Hare Intl

Sun 4/19

4:57 pm-9:13 am

1 stop15h 16m

$254

IslipChicago

ISP - ORD

ISPORD

Islip Long Island

Fri 5/15

11:00 am-11:13 pm

1 stop13h 13m

Chicago O'Hare Intl

Mon 5/18

9:42 pm-10:05 am

2 stops35h 23m

$265

Quickest round-trip

IslipSt. Louis

ISP - STL

ISPSTL

Islip Long Island

Tue 4/28

9:00 am-3:15 pm

1 stop7h 15m

Lambert-St Louis

Tue 5/5

6:35 am-11:55 am

1 stop4h 20m

$291

IslipSt. Louis

ISP - STL

ISPSTL

Islip Long Island

Tue 4/28

6:30 am-2:50 pm

2 stops9h 20m

Lambert-St Louis

Tue 5/5

6:35 am-1:50 pm

1 stop6h 15m

$296

IslipSt. Louis

ISP - STL

ISPSTL

Islip Long Island

Tue 4/28

6:30 am-12:50 pm

2 stops7h 20m

Lambert-St Louis

Tue 5/5

5:35 am-1:50 pm

2 stops7h 15m

$301

IslipSt. Louis

ISP - STL

ISPSTL

Islip Long Island

Fri 5/1

5:10 pm-11:40 pm

1 stop7h 30m

Lambert-St Louis

Tue 5/5

1:15 pm-6:30 pm

1 stop4h 15m

$302

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 Islip, New York to Illinois

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 Islip Long Island to Illinois?

Frontier and Southwest are the most popular carriers operating from Islip Long Island to Illinois

What airlines fly to Illinois?

United Airlines, American Airlines and Spirit Airlines are the top three most popular airlines that fly to Illinois from Islip, New York according to our data. United Airlines is the first choice among our users, with 45% of people opting to fly with this airline when traveling to Illinois. Keep in mind that there are 7 different airlines that fly to Illinois on a routine basis, so you have a few additional options to choose from.

Cheap Islip, New York to Illinois flight deals and tips

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

Fastest flight time	7h 30m
Direct flights	None

The fastest flight from Islip, New York to Illinois takes 7h 30m

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

Search flight deals

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

When did momondo last update prices for flights from Islip Long Island Airport to Illinois?
Prices for flights from Islip Long Island Airport to Illinois were last updated today.
How many operators does momondo search for flights from Islip Long Island Airport to Illinois?
As of April 2026, there is 1 operator available to choose from for flights from Islip Long Island Airport to Illinois.
How old do you have to be to fly from Islip Long Island Airport to Illinois?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Islip Long Island Airport to Illinois.
What documentation or ID do you need to fly to Illinois?
The travel and health documents required for your trip to Illinois 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 Illinois. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Best airlines flying from Islip, New York to Illinois

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

Airline	Rating	Free Cancellation	Price
Southwest	PriceFrom $366	Free Cancellation	Rating 8.0 4,335 reviews		Search Southwest flights

Why use momondo?

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

It is quick and easy to find Islip to Illinois 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 Illinois that suits you.

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

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

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

Once all potential Islip to Illinois flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

If you are simply researching potential flights to Illinois, momondo offers a useful price alert feature which will track prices for flights to Illinois from Islip and alert you when they change.