Cheap flights from Islip, New York to Illinois from $114

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Islip, New York to Illinois departing on 9/7. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Islip, New York to Illinois

Cheap round-trip flights

Frontier Logo
5:06 pm - 1:05 pmISP-ORD
20h 59m1 stop
Frontier Logo
8:00 am - 10:50 amORD-ISP
25h 50m1 stop
$218Frontier
Find Deal
Sat, Aug 30 - Sat, Sep 6
Frontier Logo
5:18 pm - 7:10 amISP-ORD
14h 52m1 stop
Frontier Logo
8:49 pm - 10:40 amORD-ISP
12h 51m1 stop
$235Frontier
Find Deal
Sat, Sep 20 - Mon, Sep 22
Frontier Logo
9:58 am - 6:41 pmISP-ORD
9h 43m1 stop
Frontier Logo
7:46 pm - 8:08 amORD-ISP
11h 22m1 stop
$238Frontier
Find Deal
Fri, Aug 29 - Sun, Aug 31
Southwest Logo
6:25 am - 11:50 amISP-ORD
6h 25m1 stop
Southwest Logo
1:50 pm - 10:05 pmORD-ISP
7h 15m1 stop
$240Southwest
Find Deal
Thu, Sep 11 - Tue, Sep 16
Frontier Logo
11:25 am - 7:44 pmISP-ORD
9h 19m1 stop
Frontier Logo
8:49 pm - 10:40 amORD-ISP
12h 51m1 stop
$243Frontier
Find Deal
Thu, Sep 11 - Mon, Sep 15
Southwest Logo
6:05 am - 11:50 amISP-ORD
6h 45m1 stop
Southwest Logo
11:55 am - 10:05 pmORD-ISP
9h 10m2 stops
$245Southwest
Find Deal
Sat, Nov 1 - Mon, Nov 3
Frontier Logo
7:33 pm - 6:41 pmISP-ORD
24h 08m1 stop
Frontier Logo
7:46 pm - 11:59 pmORD-ISP
27h 13m1 stop
$247Frontier
Find Deal
Thu, Aug 21 - Mon, Aug 25
Southwest Logo
6:05 am - 4:25 pmISP-ORD
11h 20m2 stops
Southwest Logo
11:55 am - 10:05 pmORD-ISP
9h 10m2 stops
$256Southwest
Find Deal
Sat, Nov 1 - Mon, Nov 3
Southwest Logo
5:30 am - 1:05 pmISP-ORD
8h 35m1 stop
Southwest Logo
2:55 pm - 10:55 pmORD-ISP
7h 00m2 stops
$277Southwest
Find Deal
Tue, Sep 9 - Fri, Sep 12
 Logo
8:00 am - 10:22 pmISP-ORD
15h 22m1 stop
 Logo
6:10 am - 8:06 pmORD-ISP
12h 56m1 stop
Wed, Aug 20 - Sun, Aug 24

Southwest flights from Islip, New York to Illinois

Our best Southwest deals on Islip, New York to Illinois flight tickets
Southwest
Sep 11
ISP6:25 amIslip Long Island
6h 25m
1 stop
ORD11:50 amChicago O'Hare Intl
Sep 16
ORD1:50 pmChicago O'Hare Intl
7h 15m
1 stop
ISP10:05 pmIslip Long Island
Southwest
Nov 1
ISP6:05 amIslip Long Island
6h 45m
1 stop
ORD11:50 amChicago O'Hare Intl
Nov 3
ORD11:55 amChicago O'Hare Intl
9h 10m
2 stops
ISP10:05 pmIslip Long Island
Southwest
Nov 1
ISP6:05 amIslip Long Island
11h 20m
2 stops
ORD4:25 pmChicago O'Hare Intl
Nov 3
ORD11:55 amChicago O'Hare Intl
9h 10m
2 stops
ISP10:05 pmIslip Long Island

Frontier flights from Islip, New York to Illinois

Our best Frontier deals on Islip, New York to Illinois flight tickets
Frontier
Aug 30
ISP5:06 pmIslip Long Island
20h 59m
1 stop
ORD1:05 pmChicago O'Hare Intl
Sep 6
ORD8:00 amChicago O'Hare Intl
25h 50m
1 stop
ISP10:50 amIslip Long Island
Frontier
Sep 20
ISP5:18 pmIslip Long Island
14h 52m
1 stop
ORD7:10 amChicago O'Hare Intl
Sep 22
ORD8:49 pmChicago O'Hare Intl
12h 51m
1 stop
ISP10:40 amIslip Long Island
Frontier
Aug 29
ISP9:58 amIslip Long Island
9h 43m
1 stop
ORD6:41 pmChicago O'Hare Intl
Aug 31
ORD7:46 pmChicago O'Hare Intl
11h 22m
1 stop
ISP8:08 amIslip Long Island

momondo Fare Finder

 
Customize your flight search to find flights from Islip, New York to Illinois 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, momondo users made 832,500 searches. Data last updated August 6, 2025.
Use the filters below to find and compare flights from Islip, New York to Illinois that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

IslipChicago

ISP - ORD

ISPORD

Islip Long Island

Sat 8/30

5:06 pm-1:05 pm

1 stop20h 59m

Chicago O'Hare Intl

Sat 9/6

8:00 am-10:50 am

1 stop25h 50m

$218

IslipChicago

ISP - ORD

ISPORD

Islip Long Island

Sat 9/20

5:18 pm-7:10 am

1 stop14h 52m

Chicago O'Hare Intl

Mon 9/22

8:49 pm-10:40 am

1 stop12h 51m

$235

IslipChicago

ISP - ORD

ISPORD

Islip Long Island

Fri 8/29

9:58 am-6:41 pm

1 stop9h 43m

Chicago O'Hare Intl

Sun 8/31

7:46 pm-8:08 am

1 stop11h 22m

$238

IslipChicago

ISP - ORD

ISPORD

Islip Long Island

Thu 9/11

6:25 am-11:50 am

1 stop6h 25m

Chicago O'Hare Intl

Tue 9/16

1:50 pm-10:05 pm

1 stop7h 15m

$240

IslipChicago

ISP - ORD

ISPORD

Islip Long Island

Thu 9/11

11:25 am-7:44 pm

1 stop9h 19m

Chicago O'Hare Intl

Mon 9/15

8:49 pm-10:40 am

1 stop12h 51m

$243

IslipChicago

ISP - ORD

ISPORD

Islip Long Island

Sat 11/1

6:05 am-11:50 am

1 stop6h 45m

Chicago O'Hare Intl

Mon 11/3

11:55 am-10:05 pm

2 stops9h 10m

$245

IslipChicago

ISP - ORD

ISPORD

Islip Long Island

Thu 8/21

7:33 pm-6:41 pm

1 stop24h 08m

Chicago O'Hare Intl

Mon 8/25

7:46 pm-11:59 pm

1 stop27h 13m

$247

IslipChicago

ISP - ORD

ISPORD

Islip Long Island

Sat 11/1

6:05 am-4:25 pm

2 stops11h 20m

Chicago O'Hare Intl

Mon 11/3

11:55 am-10:05 pm

2 stops9h 10m

$256

IslipChicago

ISP - ORD

ISPORD

Islip Long Island

Tue 9/9

5:30 am-1:05 pm

1 stop8h 35m

Chicago O'Hare Intl

Fri 9/12

2:55 pm-10:55 pm

2 stops7h 00m

$277

IslipChicago

ISP - ORD

ISPORD

Islip Long Island

Wed 8/20

8:00 am-10:22 pm

1 stop15h 22m

Chicago O'Hare Intl

Sun 8/24

6:10 am-8:06 pm

1 stop12h 56m

$313

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Illinois from

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

What is the cheapest time of day to depart on your flight to Illinois?

Our most recent data shows that the best time of day to fly to Illinois is at noon. Flights from Islip, New York to Illinois during this time can be as low as $259. Flights in the afternoon are often more expensive with an average ticket price of $305.

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

Best Price Found

$114

Fastest flight time

6h 05m

Direct flights

None

Airports in Illinois

2 airports
The best one-way flight to Illinois from Islip, New York in the past 72 hours is $114. The best round-trip flight deal from Islip, New York to Illinois found on momondo in the last 72 hours is $218.
The fastest flight from Islip, New York to Illinois takes 6h 05m
There are no direct flights from Islip, New York to Illinois. Popular non-direct routes for this connection are Islip Long Island Airport - Chicago O'Hare Intl Airport and Islip Long Island Airport - Lambert-St Louis Airport.
There are 2 airports near Illinois: Chicago O'Hare Intl (ORD), Lambert-St Louis (STL)
  • 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?

  • 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.

Best airlines flying from Islip, New York to Illinois

Compare and see reviews for airlines that fly from Islip, New York to Illinois with momondo
Airline
Rating
Free Cancellation
Price
SouthwestPriceFrom $336Free CancellationRating
8.0
4,244 reviews
Search Southwest flights

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.

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1 adult
Mon 8/11
Mon 8/18

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