ISP

$129 Find Cheap Flights from Illinois to Islip - Compare and Save

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight to Islip departing on 7/28. 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

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Flight Deals

Cheap Flights from Illinois to Islip

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Illinois to Islip 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 Illinois to Islip

Tue, Sep 8 - Wed, Sep 16
Frontier Logo
7:44 pm - 9:33 am
ORD
-
ISP
12h 49m
1 stop
Frontier Logo
4:13 pm - 11:55 pm
ISP
-
ORD
8h 42m
1 stop
$252Frontier
Tue, Sep 8 - Thu, Sep 17
Frontier Logo
7:44 pm - 9:33 am
ORD
-
ISP
12h 49m
1 stop
Frontier Logo
4:13 pm - 11:55 pm
ISP
-
ORD
8h 42m
1 stop
$255Frontier
Wed, Sep 2 - Tue, Sep 8
Frontier Logo
7:44 pm - 9:53 am
ORD
-
ISP
13h 09m
1 stop
Frontier Logo
10:57 am - 11:08 pm
ISP
-
ORD
13h 11m
1 stop
$258Frontier
Tue, Sep 8 - Sun, Sep 13
Frontier Logo
7:44 pm - 9:33 am
ORD
-
ISP
12h 49m
1 stop
Frontier Logo
4:13 pm - 11:55 pm
ISP
-
ORD
8h 42m
1 stop
$260Frontier
Thu, Sep 3 - Tue, Sep 8
Frontier Logo
7:44 pm - 9:53 am
ORD
-
ISP
13h 09m
1 stop
Frontier Logo
10:57 am - 11:08 pm
ISP
-
ORD
13h 11m
1 stop
$263Frontier
Thu, Sep 3 - Sun, Sep 13
Frontier Logo
7:44 pm - 9:53 am
ORD
-
ISP
13h 09m
1 stop
Frontier Logo
4:13 pm - 11:55 pm
ISP
-
ORD
8h 42m
1 stop
$268Frontier
Tue, Sep 8 - Mon, Sep 14
Frontier Logo
7:44 pm - 9:33 am
ORD
-
ISP
12h 49m
1 stop
Frontier Logo
4:13 pm - 11:55 pm
ISP
-
ORD
8h 42m
1 stop
$270Frontier
Tue, Sep 8 - Mon, Sep 14
Southwest Logo
6:25 am - 2:55 pm
STL
-
ISP
7h 30m
1 stop
Southwest Logo
6:45 am - 12:15 pm
ISP
-
STL
6h 30m
1 stop
$273Southwest
Wed, Oct 21 - Thu, Oct 22
Frontier Logo
6:05 am - 3:03 pm
ORD
-
ISP
7h 58m
1 stop
Frontier Logo
4:13 pm - 11:55 pm
ISP
-
ORD
8h 42m
1 stop
$273Frontier
Tue, Sep 8 - Mon, Sep 14
Southwest Logo
6:25 am - 2:55 pm
STL
-
ISP
7h 30m
1 stop
Southwest Logo
1:15 pm - 10:25 pm
ISP
-
STL
10h 10m
2 stops
$278Southwest
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Good to know

Low seasonFebruary
Cheapest flight$129
Best time to beat the crowds but there is an average 4% increase in price.
Most popular time to fly with an average 10% increase in price.
Flight from St. Louis to Islip

FAQs for booking flights from Illinois to Islip

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

    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 Illinois to Islip.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Islip from 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 Illinois to Islip?

    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 to Islip with an airline and back to Illinois with another airline.

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

    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 to Islip from Illinois up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Traveling to a place near Islip?

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

Everything you need to know for your flight to Islip

Information on the airport you'll fly into in Islip

Islip (ISP)