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Islip

$97+ 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 5/31. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — ISP
may. 5 — may. 121
lun. 5/5
lun. 5/12
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 abril 30, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$208
(Booking.com)

One-way from

$98
(Cheapflightsfares)

Popular in

December

Cheapest in

September

Average price

$206
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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Highest demand for flights based on searches. 8% potential increase in price ($16 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($6 potential savings vs. average RT price).
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Average for round-trip flights in April 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 abril 30, 2025.

This Frontier deal was found by Cheapflights users on 4/29. 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.
jue. 5/229:17 amORD - ISP
1 stop9h 17mFrontier
sáb. 5/249:06 pmISP - ORD
1 stop12h 16mFrontier
Deal found 4/29$208
This Booking.com deal was found by Cheapflights users on 4/29. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 5/155:45 pmSTL - ISP
1 stop15h 27mFrontier
lun. 5/196:48 pmISP - STL
1 stop6h 18mFrontier
Deal found 4/29$208
This Southwest deal was found by Cheapflights users on 4/29. 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.
jue. 6/125:05 pmSTL - ISP
1 stop6h 00mSouthwest
sáb. 6/1411:40 amISP - STL
1 stop9h 30mSouthwest
Deal found 4/29$227
This Southwest deal was found by Cheapflights users on 4/29. 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.
mié. 6/111:50 pmORD - ISP
1 stop8h 05mSouthwest
sáb. 6/146:00 amISP - ORD
2 stops11h 25mSouthwest
Deal found 4/29$303
This Mytrip deal was found by Cheapflights users on 4/29. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 6/1312:08 pmORD - ISP
1 stop29h 37mMultiple Airlines
vie. 6/203:59 pmISP - ORD
2 stops15h 38mMultiple Airlines
Deal found 4/29$528

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 abril 30, 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

jue. 5/22

9:17 am-7:34 pm

1 stop9h 17m

Islip Long Island

sáb. 5/24

9:06 pm-8:22 am

1 stop12h 16m

$208

St. LouisIslip

STL - ISP

STLISP

Lambert-St Louis

jue. 5/15

5:45 pm-10:12 am

1 stop15h 27m

Islip Long Island

lun. 5/19

6:48 pm-12:06 am

1 stop6h 18m

$208

St. LouisIslip

STL - ISP

STLISP

Lambert-St Louis

jue. 6/12

5:05 pm-12:05 am

1 stop6h 00m

Islip Long Island

sáb. 6/14

11:40 am-8:10 pm

1 stop9h 30m

$227

ChicagoIslip

ORD - ISP

ORDISP

Chicago O'Hare Intl

mié. 6/11

1:50 pm-10:55 pm

1 stop8h 05m

Islip Long Island

sáb. 6/14

6:00 am-4:25 pm

2 stops11h 25m

$303

ChicagoIslip

ORD - ISP

ORDISP

Chicago O'Hare Intl

vie. 6/13

12:08 pm-6:45 pm

1 stop29h 37m

Islip Long Island

vie. 6/20

3:59 pm-6:37 am

2 stops15h 38m

$528

ChicagoIslip

ORD - ISP

ORDISP

Chicago O'Hare Intl

sáb. 5/31

1:02 pm-8:42 pm

1 stop6h 40m

$97

St. LouisIslip

STL - ISP

STLISP

Lambert-St Louis

jue. 5/29

11:10 am-8:20 pm

2 stops8h 10m

$119

St. LouisIslip

STL - ISP

STLISP

Lambert-St Louis

jue. 5/29

5:45 pm-7:34 pm

1 stop24h 49m

$140

ChicagoIslip

ORD - ISP

ORDISP

Chicago O'Hare Intl

mar. 6/17

1:50 pm-10:55 pm

1 stop8h 05m

$181

ChicagoIslip

ORD - ISP

ORDISP

Chicago O'Hare Intl

mar. 6/17

5:05 am-1:32 pm

3 stops31h 27m

$279

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/29

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 $108). Flying from Illinois to Islip, New York in November is currently the most expensive (average of $213). 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 abril 30, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Illinois to Islip, New York as you normally would.

Rainfall in Islip by month

Plan your trip to Islip by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Islip, New York ranges from 3.3 - 4.4 inches per month. March is typically the wettest month, when rainfall can reach 4.4 in. February is typically the driest time to visit Islip, New York when rainfall is around 3.3 in.

Temperature in Islip by month

Plan your trip to Islip by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Islip, New York, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 30.2 F).

Reviews of airlines servicing Islip

Get insights into the airlines that provide service to Islip. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Islip. Reviews last updated abril 30, 2025.
Read reviews from past customers who have flown Southwest and Frontier from Illinois to Islip. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,295 reviews

Crew

8.6

Boarding

8.2

Comfort

8.0

Entertainment

7.6

Food

7.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Gina,Apr 2025

LAS - DEN

Good, the crew was friendly and helpful. The pilot had great skills in keeping the plane stable through rough turbulence. Smooth landing, too! Thank you!
Southwest
8.0
Very good
4,295 reviews
Southwest
8.0
Very good
4,295 reviews

Crew

8.6

Boarding

8.2

Comfort

8.0

Entertainment

7.6

Food

7.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Gina,Apr 2025

LAS - DEN

Good, the crew was friendly and helpful. The pilot had great skills in keeping the plane stable through rough turbulence. Smooth landing, too! Thank you!
Frontier
6.0
Okay
3,284 reviews
Southwest
8.0
Very good
4,295 reviews

Crew

8.6

Boarding

8.2

Comfort

8.0

Entertainment

7.6

Food

7.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Gina,Apr 2025

LAS - DEN

Good, the crew was friendly and helpful. The pilot had great skills in keeping the plane stable through rough turbulence. Smooth landing, too! Thank you!

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.

  • 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 $108). Flying from Illinois to Islip, New York in November is currently the most expensive (average of $213). 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

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