What airlines fly to Illinois?

United Airlines, American Airlines and Delta 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 55% of people opting to fly with this airline when traveling to Illinois. Keep in mind that there are 6 different airlines that fly to Illinois on a routine basis, so you have a few additional options to choose from.

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

Frontier, JetBlue, and Southwest are the most popular carriers operating from Islip Long Island 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 August 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.

$117 Cheap Flights from Islip, New York to Illinois in 2026

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.

4:20 pm - 10:15 pmISP Islip Long Island-STL Lambert-St Louis

6h 55m1 stop Orlando

6:25 am - 12:05 pmSTL Lambert-St Louis-ISP Islip Long Island

4h 40m1 stop Baltimore/Washington

$214Southwest

Wed, Oct 14 - Sat, Nov 14

6:05 am - 12:50 pmISP Islip Long Island-STL Lambert-St Louis

7h 45m2 stops Baltimore/Washington Tampa

6:25 am - 12:05 pmSTL Lambert-St Louis-ISP Islip Long Island

4h 40m1 stop Baltimore/Washington

$219Southwest

Wed, Oct 14 - Sat, Nov 14

12:35 pm - 9:45 pmISP Islip Long Island-STL Lambert-St Louis

10h 10m1 stop Baltimore/Washington

6:45 am - 12:05 pmSTL Lambert-St Louis-ISP Islip Long Island

4h 20m1 stop Baltimore/Washington

$220Southwest

Thu, Sep 24 - Sat, Sep 26

2:00 pm - 8:50 pmISP Islip Long Island-STL Lambert-St Louis

7h 50m1 stop Orlando

1:40 pm - 9:10 pmSTL Lambert-St Louis-ISP Islip Long Island

6h 30m1 stop Baltimore/Washington

$223Southwest

Sat, Sep 5 - Tue, Sep 8

6:10 am - 11:35 amISP Islip Long Island-STL Lambert-St Louis

6h 25m1 stop Baltimore/Washington

2:25 pm - 9:35 pmSTL Lambert-St Louis-ISP Islip Long Island

6h 10m1 stop Orlando

$223Southwest

Thu, Sep 10 - Thu, Sep 17

12:35 pm - 9:45 pmISP Islip Long Island-STL Lambert-St Louis

10h 10m1 stop Baltimore/Washington

5:45 am - 2:30 pmSTL Lambert-St Louis-ISP Islip Long Island

7h 45m2 stops Chicago Midway Baltimore/Washington

$225Southwest

Thu, Sep 24 - Sat, Sep 26

6:05 am - 12:50 pmISP Islip Long Island-STL Lambert-St Louis

7h 45m2 stops Baltimore/Washington Tampa

5:45 am - 2:55 pmSTL Lambert-St Louis-ISP Islip Long Island

8h 10m2 stops Chicago Midway Baltimore/Washington

$234Southwest

Wed, Oct 14 - Sat, Nov 14

10:57 am - 11:08 pmISP Islip Long Island-ORD Chicago O'Hare Intl

13h 11m1 stop Orlando

9:10 pm - 9:53 amORD Chicago O'Hare Intl-ISP Islip Long Island

11h 43m1 stop Orlando

$236Frontier

Fri, Sep 4 - Mon, Sep 7

4:05 pm - 10:10 pmISP Islip Long Island-STL Lambert-St Louis

7h 05m2 stops Baltimore/Washington Nashville Intl

2:25 pm - 9:35 pmSTL Lambert-St Louis-ISP Islip Long Island

6h 10m1 stop Orlando

$239Southwest

Thu, Sep 10 - Thu, Sep 17

10:57 am - 11:08 pmISP Islip Long Island-ORD Chicago O'Hare Intl

13h 11m1 stop Orlando

7:44 pm - 9:53 amORD Chicago O'Hare Intl-ISP Islip Long Island

13h 09m1 stop Orlando

$244Frontier

Tue, Sep 1 - Sat, Sep 5

Cheap last minute flights

Enter your travel dates to find the best prices.

10:57 am - 11:08 pmISP Islip Long Island-ORD Chicago O'Hare Intl

13h 11m1 stop Orlando

7:44 pm - 9:53 amORD Chicago O'Hare Intl-ISP Islip Long Island

13h 09m1 stop Orlando

$350Frontier

Thu, Aug 20 - Sun, Aug 23

10:57 am - 11:08 pmISP Islip Long Island-ORD Chicago O'Hare Intl

13h 11m1 stop Orlando

6:05 am - 6:14 pmORD Chicago O'Hare Intl-ISP Islip Long Island

11h 09m1 stop Orlando

$448Frontier

Wed, Aug 19 - Mon, Aug 24

7:09 pm - 1:20 pmISP Islip Long Island-ORD Chicago O'Hare Intl

19h 11m1 stop Orlando

9:10 pm - 9:53 amORD Chicago O'Hare Intl-ISP Islip Long Island

11h 43m1 stop Orlando

$448Frontier

Thu, Aug 20 - Mon, Aug 24

7:09 pm - 1:20 pmISP Islip Long Island-ORD Chicago O'Hare Intl

19h 11m1 stop Orlando

7:44 pm - 9:53 amORD Chicago O'Hare Intl-ISP Islip Long Island

13h 09m1 stop Orlando

$448Frontier

Thu, Aug 20 - Sun, Aug 23

7:09 pm - 1:20 pmISP Islip Long Island-ORD Chicago O'Hare Intl

19h 11m1 stop Orlando

9:10 pm - 4:47 pmORD Chicago O'Hare Intl-ISP Islip Long Island

18h 37m2 stops Orlando Raleigh-Durham

$536Multiple Airlines

Thu, Aug 20 - Mon, Aug 24

10:57 am - 7:59 pmISP Islip Long Island-ORD Chicago O'Hare Intl

10h 02m2 stops Orlando Atlanta Hartsfield-Jackson

7:44 pm - 9:53 amORD Chicago O'Hare Intl-ISP Islip Long Island

13h 09m1 stop Orlando

$540Frontier

Thu, Aug 20 - Sun, Aug 23

10:57 am - 7:53 amISP Islip Long Island-ORD Chicago O'Hare Intl

21h 56m2 stops Orlando Atlanta Hartsfield-Jackson

9:10 pm - 9:53 amORD Chicago O'Hare Intl-ISP Islip Long Island

11h 43m1 stop Orlando

$540Frontier

Wed, Aug 19 - Mon, Aug 24

2:28 pm - 11:08 pmISP Islip Long Island-ORD Chicago O'Hare Intl

33h 40m2 stops Raleigh-Durham Orlando

5:59 pm - 9:53 amORD Chicago O'Hare Intl-ISP Islip Long Island

14h 54m1 stop Orlando

$593Multiple Airlines

Mon, Aug 17 - Wed, Aug 19

10:57 am - 11:08 pmISP Islip Long Island-ORD Chicago O'Hare Intl

13h 11m1 stop Orlando

7:44 pm - 9:53 amORD Chicago O'Hare Intl-ISP Islip Long Island

13h 09m1 stop Orlando

$603Frontier

Tue, Aug 18 - Thu, Aug 20

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Frontier flights from Islip, New York to Illinois

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

Frontier

Sep 4

ISP10:57 amIslip Long Island

13h 11m

1 stop

ORD11:08 pmChicago O'Hare Intl

Sep 7

ORD9:10 pmChicago O'Hare Intl

11h 43m

1 stop

ISP9:53 amIslip Long Island

$236

Frontier

Sep 1

ISP10:57 amIslip Long Island

13h 11m

1 stop

ORD11:08 pmChicago O'Hare Intl

Sep 5

ORD7:44 pmChicago O'Hare Intl

13h 09m

1 stop

ISP9:53 amIslip Long Island

$244

Frontier

Sep 2

ISP10:57 amIslip Long Island

13h 11m

1 stop

ORD11:08 pmChicago O'Hare Intl

Sep 4

ORD9:10 pmChicago O'Hare Intl

11h 43m

1 stop

ISP9:53 amIslip Long Island

$254

JetBlue flights from Islip, New York to Illinois

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

JetBlue

Sep 5

ISP6:00 amIslip Long Island

9h 24m

1 stop

ORD2:24 pmChicago O'Hare Intl

Sep 9

ORD3:00 pmChicago O'Hare Intl

7h 22m

1 stop

ISP11:22 pmIslip Long Island

$291

JetBlue

Sep 14

ISP7:00 amIslip Long Island

7h 45m

1 stop

ORD1:45 pmChicago O'Hare Intl

Sep 18

ORD3:00 pmChicago O'Hare Intl

7h 22m

1 stop

ISP11:22 pmIslip Long Island

$346

JetBlue

Aug 26

ISP6:00 amIslip Long Island

8h 39m

1 stop

ORD1:39 pmChicago O'Hare Intl

Sep 14

ORD3:00 pmChicago O'Hare Intl

7h 22m

1 stop

ISP11:22 pmIslip Long Island

$488

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Quickest round-trip

IslipSt. Louis

ISP Islip Long Island - STL Lambert-St Louis

ISPSTL

Islip Long Island

Wed 10/14

4:20 pm-10:15 pm

1 stop6h 55m

Lambert-St Louis

Sat 11/14

6:25 am-12:05 pm

1 stop4h 40m

$214

IslipSt. Louis

ISP Islip Long Island - STL Lambert-St Louis

ISPSTL

Islip Long Island

Wed 10/14

6:05 am-12:50 pm

2 stops7h 45m

Lambert-St Louis

Sat 11/14

6:25 am-12:05 pm

1 stop4h 40m

$219

IslipSt. Louis

ISP Islip Long Island - STL Lambert-St Louis

ISPSTL

Islip Long Island

Thu 9/24

12:35 pm-9:45 pm

1 stop10h 10m

Lambert-St Louis

Sat 9/26

6:45 am-12:05 pm

1 stop4h 20m

$220

IslipSt. Louis

ISP Islip Long Island - STL Lambert-St Louis

ISPSTL

Islip Long Island

Sat 9/5

2:00 pm-8:50 pm

1 stop7h 50m

Lambert-St Louis

Tue 9/8

1:40 pm-9:10 pm

1 stop6h 30m

$223

IslipSt. Louis

ISP Islip Long Island - STL Lambert-St Louis

ISPSTL

Islip Long Island

Thu 9/10

6:10 am-11:35 am

1 stop6h 25m

Lambert-St Louis

Thu 9/17

2:25 pm-9:35 pm

1 stop6h 10m

$223

IslipSt. Louis

ISP Islip Long Island - STL Lambert-St Louis

ISPSTL

Islip Long Island

Thu 9/24

12:35 pm-9:45 pm

1 stop10h 10m

Lambert-St Louis

Sat 9/26

5:45 am-2:30 pm

2 stops7h 45m

$225

IslipSt. Louis

ISP Islip Long Island - STL Lambert-St Louis

ISPSTL

Islip Long Island

Wed 10/14

6:05 am-12:50 pm

2 stops7h 45m

Lambert-St Louis

Sat 11/14

5:45 am-2:55 pm

2 stops8h 10m

$234

IslipChicago

ISP Islip Long Island - ORD Chicago O'Hare Intl

ISPORD

Islip Long Island

Fri 9/4

10:57 am-11:08 pm

1 stop13h 11m

Chicago O'Hare Intl

Mon 9/7

9:10 pm-9:53 am

1 stop11h 43m

$236

IslipSt. Louis

ISP Islip Long Island - STL Lambert-St Louis

ISPSTL

Islip Long Island

Thu 9/10

4:05 pm-10:10 pm

2 stops7h 05m

Lambert-St Louis

Thu 9/17

2:25 pm-9:35 pm

1 stop6h 10m

$239

IslipChicago

ISP Islip Long Island - ORD Chicago O'Hare Intl

ISPORD

Islip Long Island

Tue 9/1

10:57 am-11:08 pm

1 stop13h 11m

Chicago O'Hare Intl

Sat 9/5

7:44 pm-9:53 am

1 stop13h 09m

$244

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

Prices

Airlines

What is the cheapest month to fly to Illinois?

The cheapest month to fly to Illinois from Islip, New York is in October. Flight prices, which tend to average around $0, are often lower during this time because this is during the off-season. If you aren’t able to travel to Illinois during the month of October, then flying in February is also cheap. Prices for this month can be found on momondo for an average of $0.

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	4h 45m
Direct flights	None

The fastest flight from Islip, New York to Illinois takes 4h 45m

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 August 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.

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.