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Islip

$111+ Cheap flights from Illinois to Islip (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 11/6. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — ISP
Nov 13 — Nov 201
Thu 11/13
Thu 11/20
1 adult, Economy
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Cheap flight deals from Illinois to Islip

Keep the following information in mind while searching for Illinois to Islip flight deals. Data was last updated October 14, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$198
(Kiwi.com)

One-way from

$111
(Frontier)

Popular in

December

Cheapest in

January

Average price

$201
Provider with most accurate pricing for Chicago (CHI)-New York (NYC) flight deals.
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Provider most trusted by Cheapflights users for Chicago (CHI)-New York (NYC) flights.
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From Illinois to Islip Long Island
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One-way flight from Illinois to Islip Long Island
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High demand for flights, 1% potential price rise
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Cheapest flight prices on average. 1% potential price decrease ($4 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
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Find 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 October 14, 2025.

This Kiwi.com deal was found by Cheapflights users on 10/13. 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 11/135:25 amORD - ISP
1 stop11h 17mMultiple Airlines
Tue 11/186:27 pmISP - ORD
1 stop29h 39mMultiple Airlines
Deal found 10/13$198
This Frontier deal was found by Cheapflights users on 10/14. 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.
Thu 12/117:49 pmORD - ISP
1 stop12h 22mFrontier
Mon 12/1510:06 amISP - ORD
1 stop9h 38mFrontier
Deal found 10/14$262
This Frontier deal was found by Cheapflights users on 10/14. 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.
Thu 12/47:49 pmORD - ISP
1 stop12h 22mFrontier
Mon 12/810:06 amISP - ORD
1 stop9h 38mFrontier
Deal found 10/14$274
This Kiwi.com deal was found by Cheapflights users on 10/12. 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.
Mon 10/276:23 pmORD - ISP
1 stop22h 19mFrontier
Fri 10/314:58 pmISP - ORD
1 stop23h 10mFrontier
Deal found 10/12$276
This Kiwi.com deal was found by Cheapflights users on 10/12. 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.
Mon 10/279:08 pmORD - ISP
2 stops36h 29mMultiple Airlines
Fri 10/312:25 pmISP - ORD
1 stop10h 03mMultiple Airlines
Deal found 10/12$295
This Kiwi.com deal was found by Cheapflights users on 10/13. 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 10/2311:32 amSTL - ISP
2 stops22h 05mFrontier
Thu 10/306:37 pmISP - STL
1 stop19h 40mFrontier
Deal found 10/13$315
This Kiwi.com deal was found by Cheapflights users on 10/13. 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.
Sun 10/266:54 pmORD - ISP
1 stop14h 43mMultiple Airlines
Wed 10/294:58 pmISP - ORD
2 stops22h 47mMultiple Airlines
Deal found 10/13$334
This Southwest deal was found by Cheapflights users on 10/13. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/131:45 pmORD - ISP
2 stops9h 05mSouthwest
Tue 11/185:40 amISP - ORD
2 stops10h 05mSouthwest
Deal found 10/13$344
This Southwest deal was found by Cheapflights users on 10/13. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/305:55 amSTL - ISP
1 stop4h 55mSouthwest
Thu 10/303:20 pmISP - STL
1 stop6h 15mSouthwest
Deal found 10/13$371
This Kiwi.com deal was found by Cheapflights users on 10/14. 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.
Wed 10/298:40 pmSTL - ISP
2 stops20h 02mFrontier
Sun 11/29:27 pmISP - STL
1 stop16h 50mFrontier
Deal found 10/14$382
This Frontier deal was found by Cheapflights users on 10/14. 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.
Sun 12/147:49 pmORD - ISP
1 stop12h 22mFrontier
Sun 12/2110:16 amISP - ORD
1 stop13h 58mFrontier
Deal found 10/14$482
This Frontier deal was found by Cheapflights users on 10/14. 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.
Thu 12/188:00 amORD - ISP
1 stop10h 21mFrontier
Sun 12/2110:16 amISP - ORD
1 stop13h 58mFrontier
Deal found 10/14$515

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 October 14, 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 11/13

5:25 am-5:42 pm

1 stop11h 17m

Islip Long Island

Tue 11/18

6:27 pm-11:06 pm

1 stop29h 39m

$198

ChicagoIslip

ORD - ISP

ORDISP

Chicago O'Hare Intl

Thu 12/11

7:49 pm-9:11 am

1 stop12h 22m

Islip Long Island

Mon 12/15

10:06 am-6:44 pm

1 stop9h 38m

$262

ChicagoIslip

ORD - ISP

ORDISP

Chicago O'Hare Intl

Thu 12/4

7:49 pm-9:11 am

1 stop12h 22m

Islip Long Island

Mon 12/8

10:06 am-6:44 pm

1 stop9h 38m

$274

ChicagoIslip

ORD - ISP

ORDISP

Chicago O'Hare Intl

Mon 10/27

9:08 pm-10:37 am

2 stops36h 29m

Islip Long Island

Fri 10/31

2:25 pm-11:28 pm

1 stop10h 03m

$295

ChicagoIslip

ORD - ISP

ORDISP

Chicago O'Hare Intl

Sun 10/26

6:54 pm-10:37 am

1 stop14h 43m

Islip Long Island

Wed 10/29

4:58 pm-2:45 pm

2 stops22h 47m

$334

ChicagoIslip

ORD - ISP

ORDISP

Chicago O'Hare Intl

Thu 11/13

1:45 pm-11:50 pm

2 stops9h 05m

Islip Long Island

Tue 11/18

5:40 am-2:45 pm

2 stops10h 05m

$344

St. LouisIslip

STL - ISP

STLISP

Lambert-St Louis

Thu 10/30

5:55 am-11:50 am

1 stop4h 55m

Islip Long Island

Thu 10/30

3:20 pm-8:35 pm

1 stop6h 15m

$371

St. LouisIslip

STL - ISP

STLISP

Lambert-St Louis

Wed 10/29

8:40 pm-5:42 pm

2 stops20h 02m

Islip Long Island

Sun 11/2

9:27 pm-1:17 pm

1 stop16h 50m

$382

ChicagoIslip

ORD - ISP

ORDISP

Chicago O'Hare Intl

Sun 12/14

7:49 pm-9:11 am

1 stop12h 22m

Islip Long Island

Sun 12/21

10:16 am-11:14 pm

1 stop13h 58m

$482

ChicagoIslip

ORD - ISP

ORDISP

Chicago O'Hare Intl

Thu 12/18

8:00 am-7:21 pm

1 stop10h 21m

Islip Long Island

Sun 12/21

10:16 am-11:14 pm

1 stop13h 58m

$515

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/14

Showing 1-10 of 22 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?

Currently, October is the cheapest month in which you can book a flight from Illinois to Islip (average of $54). Flying from Illinois to Islip 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 October 14, 2025.

A simple way to save on the total cost of your ticket is to fly from Illinois to Islip 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?

    For as low as $371, Frontier can have you in Islip from Illinois in 4h 55m. There are 926 mi between Illinois and Islip. Both multi-stop and nonstop flights can be found to your destination and back.

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

    When deciding which route to take from Illinois to Islip 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?

    Currently, October is the cheapest month in which you can book a flight from Illinois to Islip (average of $54). Flying from Illinois to Islip 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

See prices for flight routes from nearby airports that may be better suited for you.
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