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

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

What airlines fly to Islip?

American Airlines, United Airlines and Spirit Airlines are the top three most popular airlines that fly to Islip from Illinois according to our data. American Airlines is the first choice among our users, with 36% of people opting to fly with this airline when traveling to Islip. Keep in mind that there are 7 different airlines that fly to Islip on a routine basis, so you have a few additional options to choose from.

How long does it take to fly to Islip?

The flight from Illinois to Islip depends on which airports you’re departing and arriving from and whether or not you have a layover. If you fly from Chicago (a popular airport in Illinois) to New York John F Kennedy Intl Airport (the most popular airport in Islip), then the flight time is 3h 04m on average. If you fly from Peoria (another popular airport in Illinois) to New York John F Kennedy Intl Airport, then the average flight time is 4h 35m.

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

Prices for flights from Illinois to Islip Long Island Airport are refreshed on a daily basis.

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

As of September 2025, there is 1 operator available to choose from for flights from Illinois to Islip Long Island Airport.

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

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Illinois 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.

$84 Cheap Flights from Illinois to Islip in 2025/26

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Find the cheapest flights from Illinois to New York

Round-trip

One-way

Last minute

Cheap round-trip flights

7:05 am - 8:54 amORD-ISP

24h 49m1 stop

9:27 pm - 12:16 pmISP-ORD

15h 49m1 stop

$168Frontier

Find Deal

jue., nov. 6 - dom., nov. 9

1:41 pm - 8:42 pmSTL-ISP

6h 01m1 stop

6:37 pm - 3:57 pmISP-STL

22h 20m2 stops

$178Frontier

Find Deal

jue., oct. 23 - jue., oct. 30

11:50 am - 10:37 amORD-ISP

21h 47m2 stops

9:47 pm - 11:18 amISP-ORD

14h 31m2 stops

$211Frontier

Find Deal

vie., oct. 17 - dom., oct. 19

9:24 am - 8:42 pmORD-ISP

10h 18m1 stop

9:37 pm - 7:34 amISP-ORD

10h 57m1 stop

$224Frontier

Find Deal

jue., oct. 9 - jue., oct. 16

3:12 pm - 9:04 amORD-ISP

16h 52m2 stops

9:47 pm - 11:18 amISP-ORD

14h 31m2 stops

$234Frontier

Find Deal

mié., oct. 8 - dom., oct. 12

6:00 am - 9:02 amORD-ISP

26h 02m2 stops

9:27 pm - 5:25 pmISP-ORD

20h 58m2 stops

$238Frontier

Find Deal

sáb., nov. 1 - dom., nov. 2

6:05 am - 12:15 pmSTL-ISP

5h 10m1 stop

3:55 pm - 10:00 pmISP-STL

7h 05m1 stop

$299Southwest

Find Deal

mar., dic. 2 - vie., dic. 5

6:05 am - 12:15 pmSTL-ISP

5h 10m1 stop

12:55 pm - 9:00 pmISP-STL

9h 05m2 stops

$304Southwest

Find Deal

mar., dic. 2 - vie., dic. 5

9:45 am - 3:20 pmSTL-ISP

4h 35m1 stop

5:30 pm - 11:15 pmISP-STL

6h 45m1 stop

$329Southwest

Find Deal

jue., ene. 1 - lun., ene. 5

9:24 am - 8:42 pmORD-ISP

10h 18m1 stop

4:58 pm - 5:53 pmISP-ORD

25h 55m1 stop

$348Multiple Airlines

Find Deal

jue., oct. 9 - lun., oct. 13

Southwest flights from Illinois to Islip

Our best Southwest deals on Illinois to Islip flight tickets

Southwest

Dec 2

STL6:05 amLambert-St Louis

5h 10m

1 stop

ISP12:15 pmIslip Long Island

Dec 5

ISP3:55 pmIslip Long Island

7h 05m

1 stop

STL10:00 pmLambert-St Louis

$299

Find similar

Southwest

Dec 2

STL6:05 amLambert-St Louis

5h 10m

1 stop

ISP12:15 pmIslip Long Island

Dec 5

ISP12:55 pmIslip Long Island

9h 05m

2 stops

STL9:00 pmLambert-St Louis

$304

Find similar

Southwest

Jan 1

STL9:45 amLambert-St Louis

4h 35m

1 stop

ISP3:20 pmIslip Long Island

Jan 5

ISP5:30 pmIslip Long Island

6h 45m

1 stop

STL11:15 pmLambert-St Louis

$329

Find similar

Frontier flights from Illinois to Islip

Our best Frontier deals on Illinois to Islip flight tickets

Frontier

Nov 6

ORD7:05 amChicago O'Hare Intl

24h 49m

1 stop

ISP8:54 amIslip Long Island

Nov 9

ISP9:27 pmIslip Long Island

15h 49m

1 stop

ORD12:16 pmChicago O'Hare Intl

$168

Find similar

Frontier

Oct 23

STL1:41 pmLambert-St Louis

6h 01m

1 stop

ISP8:42 pmIslip Long Island

Oct 30

ISP6:37 pmIslip Long Island

22h 20m

2 stops

STL3:57 pmLambert-St Louis

$178

Find similar

Frontier

Oct 17

ORD11:50 amChicago O'Hare Intl

21h 47m

2 stops

ISP10:37 amIslip Long Island

Oct 19

ISP9:47 pmIslip Long Island

14h 31m

2 stops

ORD11:18 amChicago O'Hare Intl

$211

Find similar

Fly from

Fly to

Route

Depart

Return

Price

ChicagoIslip

ORD - ISP

ORDISP

Chicago O'Hare Intl

jue. 11/6

7:05 am-8:54 am

1 stop24h 49m

Islip Long Island

dom. 11/9

9:27 pm-12:16 pm

1 stop15h 49m

$168

St. LouisIslip

STL - ISP

STLISP

Lambert-St Louis

jue. 10/23

1:41 pm-8:42 pm

1 stop6h 01m

Islip Long Island

jue. 10/30

6:37 pm-3:57 pm

2 stops22h 20m

$178

ChicagoIslip

ORD - ISP

ORDISP

Chicago O'Hare Intl

vie. 10/17

11:50 am-10:37 am

2 stops21h 47m

Islip Long Island

dom. 10/19

9:47 pm-11:18 am

2 stops14h 31m

$211

ChicagoIslip

ORD - ISP

ORDISP

Chicago O'Hare Intl

jue. 10/9

9:24 am-8:42 pm

1 stop10h 18m

Islip Long Island

jue. 10/16

9:37 pm-7:34 am

1 stop10h 57m

$224

ChicagoIslip

ORD - ISP

ORDISP

Chicago O'Hare Intl

mié. 10/8

3:12 pm-9:04 am

2 stops16h 52m

Islip Long Island

dom. 10/12

9:47 pm-11:18 am

2 stops14h 31m

$234

ChicagoIslip

ORD - ISP

ORDISP

Chicago O'Hare Intl

sáb. 11/1

6:00 am-9:02 am

2 stops26h 02m

Islip Long Island

dom. 11/2

9:27 pm-5:25 pm

2 stops20h 58m

$238

St. LouisIslip

STL - ISP

STLISP

Lambert-St Louis

mar. 12/2

6:05 am-12:15 pm

1 stop5h 10m

Islip Long Island

vie. 12/5

3:55 pm-10:00 pm

1 stop7h 05m

$299

St. LouisIslip

STL - ISP

STLISP

Lambert-St Louis

mar. 12/2

6:05 am-12:15 pm

1 stop5h 10m

Islip Long Island

vie. 12/5

12:55 pm-9:00 pm

2 stops9h 05m

$304

St. LouisIslip

STL - ISP

STLISP

Lambert-St Louis

jue. 1/1

9:45 am-3:20 pm

1 stop4h 35m

Islip Long Island

lun. 1/5

5:30 pm-11:15 pm

1 stop6h 45m

$329

ChicagoIslip

ORD - ISP

ORDISP

Chicago O'Hare Intl

jue. 10/9

9:24 am-8:42 pm

1 stop10h 18m

Islip Long Island

lun. 10/13

4:58 pm-5:53 pm

1 stop25h 55m

$348

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 Illinois 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

Prices

Airlines

Other information

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

On average, the least expensive day to fly to Islip from Illinois is on a Thursday. momondo users have found tickets for Thursday departures for as low as $223. However, this price may fluctuate depending on the airline, the season, and holidays. Flights from Illinois to Islip on a Wednesday will generally be more expensive and average around $416. 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 Illinois at noon is the least expensive time of day to depart. momondo users have found prices as low as $141 when looking at flights departing at noon. Flights in the morning are often more expensive with an average ticket price of $369.

Cheap Illinois to Islip flight deals and tips

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

Direct flights	None

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

Search flight deals

When did momondo last update prices for flights from Illinois to Islip Long Island Airport?
Prices for flights from Illinois to Islip Long Island Airport are refreshed on a daily basis.
How many operators does momondo search for flights from Illinois to Islip Long Island Airport?
As of September 2025, there is 1 operator available to choose from for flights from Illinois to Islip Long Island Airport.
How old do you have to be to fly from Illinois to Islip Long Island Airport?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Illinois 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.

Montauk

Riverhead

Sag Harbor

Southampton

Amagansett

Why use momondo?

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

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Illinois to Islip for you.

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

Yes. All flights to Islip from Illinois on momondo can be compared and filtered by various policies on offer, including flexible booking.

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

momondo helps you find the best flight between Illinois and Islip by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

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

Yes. momondo can track prices for Illinois 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.