$80 Find Cheap Flights from Islip to Illinois

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Islip to Illinois departing on 4/13. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Illinois

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Islip to Illinois, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Islip to Illinois, as well as popular online travel agencies
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Flight Deals

Book Cheap Islip to Illinois Plane Tickets

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Islip to Illinois that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Islip to Illinois

Fri, Mar 6 - Mon, Mar 9
Multiple Airlines Logo
1:42 pm - 11:38 pm
ISP
-
ORD
10h 56m
1 stop
Multiple Airlines Logo
12:05 pm - 11:10 am
ORD
-
ISP
46h 05m
2 stops
$284Multiple Airlines
Sun, Feb 8 - Thu, Feb 12
Multiple Airlines Logo
7:53 pm - 11:47 pm
ISP
-
ORD
28h 54m
2 stops
Multiple Airlines Logo
10:44 am - 7:38 am
ORD
-
ISP
19h 54m
1 stop
$304Multiple Airlines
Fri, May 8 - Mon, May 11
Southwest Logo
6:00 am - 10:50 am
ISP
-
STL
5h 50m
1 stop
Southwest Logo
4:00 pm - 11:30 pm
STL
-
ISP
6h 30m
1 stop
$308Southwest
Fri, May 8 - Mon, May 11
Southwest Logo
6:00 am - 10:50 am
ISP
-
STL
5h 50m
1 stop
Southwest Logo
2:15 pm - 10:30 pm
STL
-
ISP
7h 15m
2 stops
$313Southwest
Fri, May 8 - Mon, May 11
Southwest Logo
4:30 pm - 11:40 pm
ISP
-
STL
8h 10m
2 stops
Southwest Logo
2:15 pm - 10:30 pm
STL
-
ISP
7h 15m
2 stops
$318Southwest
Sun, Feb 8 - Thu, Feb 12
Multiple Airlines Logo
11:55 am - 11:59 pm
ISP
-
ORD
13h 04m
2 stops
Multiple Airlines Logo
12:44 pm - 7:38 am
ORD
-
ISP
17h 54m
1 stop
$326Multiple Airlines
Fri, Mar 6 - Mon, Mar 9
Multiple Airlines Logo
1:42 pm - 11:38 pm
ISP
-
ORD
10h 56m
1 stop
Multiple Airlines Logo
7:20 am - 11:14 am
ORD
-
ISP
26h 54m
1 stop
$329Multiple Airlines
Sun, Feb 8 - Thu, Feb 12
Multiple Airlines Logo
7:53 pm - 4:58 pm
ISP
-
ORD
22h 05m
1 stop
Multiple Airlines Logo
10:44 am - 7:38 am
ORD
-
ISP
19h 54m
1 stop
$361Multiple Airlines
Sat, Mar 14 - Sat, Mar 21
Southwest Logo
2:25 pm - 11:05 pm
ISP
-
STL
9h 40m
2 stops
Southwest Logo
6:40 am - 11:40 am
STL
-
ISP
4h 00m
1 stop
$372Southwest
Sun, Feb 8 - Thu, Feb 12
Frontier Logo
9:25 am - 9:21 am
ISP
-
STL
24h 56m
1 stop
Frontier Logo
3:49 pm - 2:39 pm
STL
-
ISP
21h 50m
1 stop
$509Frontier
Booking Insights

KAYAK's insights & trends for Islip to Illinois flights

Get data-powered insights and trends into flights from Islip to Illinois to help you find the cheapest flights, the best time to fly and much more.

Which airlines provide the cheapest flights from Islip to Illinois?

The cheapest round-trip price for the route for each airline clicked by KAYAK users in the last 72 hours.

In the past 3 days, the cheapest round-trip tickets from Islip to Illinois were found on Southwest ($308) and Frontier ($509).

Find deals

Good to know

Low seasonApril
Cheapest flight$80
Best time to beat the crowds with an average 9% drop in price.
Most popular time to fly with an average 11% increase in price.
Flight from Islip to Chicago

FAQs - booking Illinois flights

  • How does KAYAK find such low prices on flights from Islip to Illinois?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Islip to Illinois.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Islip to Illinois?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Islip to Illinois is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Islip to Illinois?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly from Islip to Illinois with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Islip to Illinois?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying from Islip to Illinois up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airline flying from Islip to Illinois

 
See real verified KAYAK customer reviews for airlines flying from Islip to Illinois. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Islip to Illinois? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
SouthwestOverall score based on 4268 reviews
7.0Food
8.0Comfort
8.1Boarding
7.5Entertainment
8.6Crew
Airline reviews

All good except once again bags took an hour at Midway Airport Happens all the time. Ridiculous

10.0 ExcellentAnonymous, Jan 2026
PHX - MDW
Read more Southwest reviews

All good except once again bags took an hour at Midway Airport Happens all the time. Ridiculous

Everything went smoothly and we even arrived a little bit early.

Great vacation. Can't wait till next year for another one.

Great flight but super high price. Glad it was a business trip and not personal

On time. Friendly staff. Took to long to pre bord all the specialty groups. Cramped small plane

The seats were comfortable, and the boarding process was pretty smooth.

3 hour delay. Had to change plans and was still delayed.

The staff was very friendly, professional, and courteous. The overall flight was a great experience.

The crew canceled the complementary snack and drink in anticipation of turbulence that never materialized. I was counting on the drink (water) to take the the doses of medication - prescribed for my heart condition - that were due during the flight. Since no snack or meal was served on this flight, I cannot rate the food quality. Otherwise, this flight was excellent.

Departure was delayed more than 1/2 hour while we waited for luggage (only) transfer from another flight/plane. Once approved for takeoff, the flight was excellent.

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

Information on your arrival and departure airports

Islip (ISP)