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Islip

$81+ Cheap flights from Illinois to Islip, NY (ISP)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/17. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — ISP
Jan 8 — Jan 151
Thu 1/8
Thu 1/15
1 adult, Economy
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Cheap flight deals from Illinois to Islip

Cheapest flights from Illinois to Islip
Explore the most affordable flight options available from Illinois to Islip. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 9, 2025.

This Frontier deal was found by Cheapflights users on 12/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/173:30 pmSTL - ISP
1 stop6h 14mFrontier
Fri 12/191:27 pmISP - STL
1 stop7h 15mFrontier
Deal found 12/7$187
This CheapOair deal was found by Cheapflights users on 12/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/152:26 pmORD - ISP
1 stop28h 08mFrontier
Mon 12/226:25 amISP - ORD
1 stop7h 09mFrontier
Deal found 12/8$205
This CheapOair deal was found by Cheapflights users on 12/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/307:01 pmORD - ISP
1 stop20h 36mFrontier
Mon 1/52:04 pmISP - ORD
1 stop27h 15mFrontier
Deal found 12/9$243
This CheapOair deal was found by Cheapflights users on 12/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/195:18 pmORD - ISP
1 stop29h 41mFrontier
Mon 12/226:25 amISP - ORD
1 stop7h 09mFrontier
Deal found 12/6$263
This Expedia deal was found by Cheapflights users on 12/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/152:26 pmORD - ISP
1 stop28h 08mFrontier
Fri 12/196:00 amISP - ORD
1 stop19h 45mFrontier
Deal found 12/9$268
This Frontier deal was found by Cheapflights users on 12/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/129:54 amSTL - ISP
1 stop8h 40mFrontier
Sat 12/1310:19 amISP - STL
1 stop13h 14mFrontier
Deal found 12/6$268
This Frontier deal was found by Cheapflights users on 12/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/129:54 amSTL - ISP
1 stop8h 40mFrontier
Sun 12/1411:15 amISP - STL
1 stop12h 18mFrontier
Deal found 12/6$272
This Frontier deal was found by Cheapflights users on 12/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/2910:40 amSTL - ISP
1 stop8h 00mFrontier
Thu 1/112:20 pmISP - STL
1 stop11h 13mFrontier
Deal found 12/8$293
This CheapOair deal was found by Cheapflights users on 12/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/1212:15 pmORD - ISP
1 stop10h 44mFrontier
Sat 12/1310:19 amISP - ORD
1 stop28h 12mFrontier
Deal found 12/9$299
This CheapOair deal was found by Cheapflights users on 12/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/237:01 pmORD - ISP
1 stop20h 36mFrontier
Wed 12/315:27 pmISP - ORD
1 stop17h 51mFrontier
Deal found 12/7$309
This Kiwi.com deal was found by Cheapflights users on 12/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/186:00 amORD - ISP
2 stops29h 42mMultiple Airlines
Sun 1/118:40 pmISP - ORD
1 stop24h 01mMultiple Airlines
Deal found 12/9$328
This CheapOair deal was found by Cheapflights users on 12/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/1212:15 pmORD - ISP
1 stop25h 55mFrontier
Sun 12/1411:15 amISP - ORD
1 stop27h 01mFrontier
Deal found 12/9$333

Find flight deals from Illinois to Islip

Keep the following information in mind while searching for Illinois to Islip flight deals. Data was last updated December 9, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$198
(CheapOair)

One-way from

$81
(Frontier)

Popular in

June

Cheapest in

January

Average price

$232
Provider with most accurate pricing for Chicago (CHI)-New York (NYC) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Chicago (CHI)-New York (NYC) flights.
Search Deals
From Illinois to Islip Long Island
Search Deals
One-way flight from Illinois to Islip Long Island
Search Deals
Highest demand for flights based on searches. 6% potential increase in price ($13 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($4 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Illinois 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, Cheapflights users made 2,558,603 searches. Data last updated December 9, 2025.
Use the filters below to find and compare flights from Illinois to Islip that are best for you.

Fly from

Illinois

Fly to

Islip

Route

Depart

Return

Price

ChicagoIslip

ORD - ISP

ORDISP

Chicago O'Hare Intl

Thu 1/15

8:51 pm-8:09 pm

1 stop22h 18m

Islip Long Island

Sun 1/18

7:58 pm-11:26 am

1 stop16h 28m

$198

ChicagoIslip

ORD - ISP

ORDISP

Chicago O'Hare Intl

Thu 1/22

3:55 pm-6:38 pm

1 stop25h 43m

Islip Long Island

Sun 1/25

9:25 am-10:41 am

1 stop26h 16m

$219

ChicagoIslip

ORD - ISP

ORDISP

Chicago O'Hare Intl

Sat 1/10

7:20 am-7:08 pm

2 stops10h 48m

Islip Long Island

Sun 1/18

9:52 am-5:52 pm

1 stop9h 00m

$245

ChicagoIslip

ORD - ISP

ORDISP

Chicago O'Hare Intl

Fri 1/23

11:45 am-8:47 pm

1 stop8h 02m

Islip Long Island

Sun 1/25

9:25 am-10:41 am

1 stop26h 16m

$253

ChicagoIslip

ORD - ISP

ORDISP

Chicago O'Hare Intl

Fri 12/19

5:18 pm-11:59 pm

1 stop29h 41m

Islip Long Island

Mon 12/22

6:25 am-12:34 pm

1 stop7h 09m

$263

St. LouisIslip

STL - ISP

STLISP

Lambert-St Louis

Mon 12/29

10:40 am-7:40 pm

1 stop8h 00m

Islip Long Island

Thu 1/1

12:20 pm-10:33 pm

1 stop11h 13m

$293

ChicagoIslip

ORD - ISP

ORDISP

Chicago O'Hare Intl

Tue 12/23

7:01 pm-4:37 pm

1 stop20h 36m

Islip Long Island

Wed 12/31

5:27 pm-10:18 am

1 stop17h 51m

$309

ChicagoIslip

ORD - ISP

ORDISP

Chicago O'Hare Intl

Wed 12/24

11:23 am-11:25 am

1 stop23h 02m

Islip Long Island

Tue 1/6

12:55 pm-4:19 pm

1 stop28h 24m

$363

ChicagoIslip

ORD - ISP

ORDISP

Chicago O'Hare Intl

Thu 12/25

11:28 am-1:09 pm

1 stop24h 41m

Islip Long Island

Mon 1/5

2:04 pm-4:19 pm

1 stop27h 15m

$373

ChicagoIslip

ORD - ISP

ORDISP

Chicago O'Hare Intl

Wed 12/24

11:23 am-11:25 am

1 stop23h 02m

Islip Long Island

Mon 1/5

8:24 pm-4:19 pm

1 stop20h 55m

$373

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/8

Showing 1-10 of 26 results
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Best time to book a flight from Illinois to Islip

Have a flexible travel schedule? Discover the best time to fly to Islip from Illinois with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Illinois to Islip

What is the cheapest month to book a flight from Illinois to Islip, New York?

Currently, January is the cheapest month in which you can book a flight from Illinois to Islip, New York (average of $36). Flying from Illinois to Islip, New York in July is currently the most expensive (average of $104). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from IL to ISP?

Find hourly flight availability from Illinois to Islip. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 9, 2025.

A simple way to save on the total cost of your ticket is to fly from Illinois to Islip, New York in the evening. If you’re flexible enough to do this you can expect to save up to 57% on your trip compared to booking a flight in the morning.

Related info for your journey

Find useful and relevant information for your journey from Illinois to Islip. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Islip from Illinois?

    Most people fly into Islip Long Island (ISP) if they book a flight to Islip from Illinois. Long Island is conveniently located just 7.2 mi from Islip’s city center.

  • How long is the flight from Illinois to Islip, New York?

    Frontier can get you from Illinois to Islip, New York in just under 22h 18m. Your travel time can differ by up to . Airlines will cover a distance of 770 mi.

  • What are the most popular routes from Illinois to Islip, New York?

    When deciding which route to take from Illinois to Islip, New York consider Chicago O'Hare Intl - Islip Long Island, Lambert-St Louis - Islip Long Island or Decatur Arpt - Islip Long Island as they are the most popular.

  • Can I find deals for flights from Illinois to Islip that include hotel bookings?

    Yes. In addition to deals on Illinois to Islip flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Illinois to Islip?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Illinois to Islip.

  • Can I find deals for business class flights from Illinois to Islip?

    Yes. Cheapflights offers flight deals from Illinois to Islip by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Illinois to Islip, New York?

    Currently, January is the cheapest month in which you can book a flight from Illinois to Islip, New York (average of $36). Flying from Illinois to Islip, New York in July is currently the most expensive (average of $104). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Islip?

Book flights to Islip if you plan to visit one of these locations
Riverhead

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Alternative routes for Illinois to Islip

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