ISP

$145 Find Cheap Flights from Illinois to Islip

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 7/17. 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

Sun, Jun 14 - Wed, Jun 17
Frontier Logo
4:17 pm - 8:57 pm
STL
-
ISP
27h 40m
1 stop
Frontier Logo
9:52 pm - 11:49 pm
ISP
-
STL
26h 57m
1 stop
$282Frontier
Sat, Jun 6 - Wed, Jun 10
Frontier Logo
4:19 pm - 10:05 am
STL
-
ISP
16h 46m
1 stop
Frontier Logo
9:52 pm - 11:49 pm
ISP
-
STL
26h 57m
1 stop
$302Frontier
Thu, Oct 15 - Sun, Oct 18
Southwest Logo
9:30 am - 5:20 pm
STL
-
ISP
6h 50m
1 stop
Southwest Logo
5:55 pm - 12:30 am
ISP
-
STL
7h 35m
1 stop
$321Southwest
Wed, Jun 24 - Wed, Jul 1
Frontier Logo
4:59 pm - 8:57 pm
ORD
-
ISP
26h 58m
1 stop
Frontier Logo
9:52 pm - 11:19 pm
ISP
-
ORD
26h 27m
1 stop
$321Frontier
Mon, Jun 8 - Fri, Jun 12
Frontier Logo
11:38 am - 3:56 pm
STL
-
ISP
27h 18m
1 stop
Frontier Logo
9:52 pm - 11:49 pm
ISP
-
STL
26h 57m
1 stop
$323Frontier
Thu, Oct 15 - Sun, Oct 18
Southwest Logo
9:30 am - 5:20 pm
STL
-
ISP
6h 50m
1 stop
Southwest Logo
12:30 pm - 10:10 pm
ISP
-
STL
10h 40m
2 stops
$343Southwest
Mon, Jun 22 - Mon, Jun 29
Frontier Logo
4:59 pm - 3:56 pm
ORD
-
ISP
21h 57m
1 stop
Frontier Logo
9:52 pm - 11:19 pm
ISP
-
ORD
26h 27m
1 stop
$352Frontier
Sat, Jun 13 - Mon, Jun 15
Frontier Logo
4:59 pm - 8:57 pm
ORD
-
ISP
26h 58m
1 stop
Frontier Logo
9:52 pm - 11:19 pm
ISP
-
ORD
26h 27m
1 stop
$354Frontier
Thu, Jul 9 - Thu, Jul 30
Multiple Airlines Logo
5:13 pm - 9:53 am
ORD
-
ISP
15h 40m
1 stop
Multiple Airlines Logo
4:58 pm - 11:44 pm
ISP
-
ORD
7h 46m
1 stop
$386Multiple Airlines
Thu, Oct 15 - Sun, Oct 18
Southwest Logo
4:25 pm - 11:35 pm
STL
-
ISP
6h 10m
2 stops
Southwest Logo
12:30 pm - 10:10 pm
ISP
-
STL
10h 40m
2 stops
$397Southwest
Useful Info

Good to know

Low seasonFebruary
Cheapest flight$145
Best time to beat the crowds but there is an average 3% increase in price.
Most popular time to fly with an average 7% 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)