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. Visit our flight page for the latest deals!>/a>

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. Visit our flight page for the latest deals!>/a>

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. Visit our flight page for the latest deals!>/a>

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. Visit our flight page for the latest deals!>/a>

$81 CHEAP FLIGHTS from Illinois to Islip

ISP

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

...and more

Travelers love KAYAK

41,299,237 searches in the past 7 days on KAYAK

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Filter your dealsChoose cabin class, free Wi-Fi and more.

Cheapest round-trip

$187

Typical prices: $319-$461

Frontier

Mon 12/15Fri 12/19

STL - ISP • 1 stop

Cheapest one-way

$81

Frontier

Wed 12/17

STL - ISP • 1 stop

Start a new search

KAYAK searches 100s of sites at once to find you the best travel deals.

We hope you love your trip to Islip!

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.

Round-trip

One-way

Last minute

Recent round-trip flight deals from Illinois to Islip

Mon, Dec 15 - Fri, Dec 19

3:30 pm - 7:34 pmSTL-ISP

27h 04m1 stop

8:35 pm - 10:33 pmISP-STL

26h 58m1 stop

$187Frontier

Find Deal

Fri, Dec 12 - Tue, Dec 16

9:54 am - 7:34 pmSTL-ISP

8h 40m1 stop

8:29 pm - 10:33 pmISP-STL

27h 04m1 stop

$196Frontier

Find Deal

Thu, Jan 15 - Sat, Jan 17

8:51 pm - 8:09 pmORD-ISP

22h 18m1 stop

8:00 am - 2:39 pmISP-ORD

7h 39m1 stop

$207Frontier

Find Deal

Fri, Dec 12 - Sun, Dec 14

12:15 pm - 11:59 pmORD-ISP

10h 44m1 stop

11:15 am - 1:16 pmISP-ORD

27h 01m1 stop

$213Frontier

Find Deal

Wed, Dec 17 - Fri, Dec 19

8:00 am - 11:25 amORD-ISP

26h 25m2 stops

6:00 am - 12:45 amISP-ORD

19h 45m1 stop

$214Frontier

Find Deal

Wed, Dec 17 - Sun, Dec 21

3:30 pm - 12:38 amSTL-ISP

8h 08m1 stop

2:04 pm - 10:33 pmISP-STL

9h 29m1 stop

$232Frontier

Find Deal

Tue, Dec 16 - Sat, Dec 20

4:22 pm - 10:44 pmORD-ISP

29h 22m2 stops

6:40 pm - 9:02 amISP-ORD

15h 22m1 stop

$235Frontier

Find Deal

Fri, Feb 27 - Sat, Feb 28

7:00 am - 4:06 pmORD-ISP

8h 06m1 stop

3:10 pm - 12:51 pmISP-ORD

22h 41m1 stop

$239Frontier

Find Deal

Sat, May 16 - Sun, May 24

9:55 am - 4:00 pmSTL-ISP

5h 05m1 stop

6:05 am - 10:50 amISP-STL

5h 45m1 stop

$323Southwest

Find Deal

Sat, May 16 - Sun, May 24

2:05 pm - 11:20 pmSTL-ISP

8h 15m2 stops

6:05 am - 10:50 amISP-STL

5h 45m1 stop

$328Southwest

Find Deal

Useful Info

Low season	January
High season	December
Cheapest flight	$81

Best time to beat the crowds with an average 15% drop in price.

Most popular time to fly with an average 3% increase in price.

Flight from St. Louis 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.

Riverhead

Amagansett

Everything you need to know for your flight to Islip

Airports

Cabin class

Complete your trip

Direct Flights

Flights to other cities

Origins

Other airports

Return flight deals

Information on the airport you'll fly into in Islip

Islip (ISP)

ISP

$81 Find Cheap Flights from Illinois to Islip

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

Everything you should know

Cheap Flights from Illinois to Islip

Recent round-trip flight deals from Illinois to Islip

Recent one-way flight deals from Illinois to Islip

Recent last minute flight deals from Illinois to Islip

Good to know

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?

Everything you need to know for your flight to Islip

Information on the airport you'll fly into in Islip

Cabin class types available on flights to Illinois

Complete your trip to Islip with a hotel stay or car rental

Find direct flights for Islip

Flights to other popular destinations

Flights from domestic origins to Islip

Choose which airport to fly into in Islip

Find deals for your return flight