$65 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 2/21. 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.
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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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Best Illinois Flight Deals from Islip

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours

St. Louis
St. Louis1 stop$120

Good to know

Cheapest flight

$65
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.

See more FAQs

Top tips for finding cheap flights to Illinois

  • High season is considered to be January, February and December. The cheapest month to fly from Islip is January.
  • Morning departure is around 15% more expensive than an evening flight, on average*.
*Average of the lowest prices shown in KAYAK’s search results for departures within the next 30 days

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.
6.0
FrontierOverall score based on 3443 reviews
4.7Entertainment
4.9Food
6.3Boarding
6.9Crew
5.7Comfort
Airline reviews

Very easy with the app to board and staff skills

10.0 ExcellentAnonymous, Jan 2025LAS - JFK
Read more Frontier reviews

Very easy with the app to board and staff skills

I took my first and last flight with FRONTIER. The seats are not able to be reclined so it’s not a very comfortable experience when you take a flight of 3 hours or longer. You must pay for your luggage either carry on or check in, so taking all this in consideration at the end what you think you’re saving your paying in services that should be included. Not a beverage in sight. . You’re seriously better off getting on a proper airline such as Delta, AA, United, etc.

After waiting several minutes to be acknowledged by 3 employees on their phones, was told we had missed our flight because the doors were closed at that literal moment. Had they given any actual service or help while we were standing there we would have been on with time to spare. More than 10 people were turned away in this fashion claiming there was no way they could let us on the plane, even though it was still sitting connected to the terminal. After the desk agents let us know they didn't care about the situation we were forced to pay more than twice the price of our original tickets as no credits were given for the price of the "missed" flight. And the icing on the cake was after being treated poorly, fleeced for another few hundred dollars for new tickets? We waited on the next plane for 25 minutes passed the "doors closed" time, letting almost an extra dozen passengers on board. You're company has lazy, disinterested employees and your lack of any real help will ensure this was the first and last time we fly Frontier. Awful.

My experience with the phoenix airport was terrible, the personnel lay the ticket counter charged me for a carry on that fit in the carry on size box, and the two women I spoke with were terribly rude and not willing to help.,,, there was one lady “candy” on the flight crew that was amazing and is the only reason I stayed on the flight at all, because the other stewards helping people to get seated on the plane were terrible

I loked walking out on the tarmac to board and no first class. I didn't like that they have no snacks or onboard wifi to bide your time.

The plane was clean, the crew was friendly and helpful. It’s a low cost airline so there was no food, drinks or in flight entertainment but we didn’t expect any of these things. In the room for improvement department, they should install USB ports in seats to charge mobile devices.

The seats were extremely hard and uncomfortable, even for a budget airline.

The seats were extremely hard and uncomfortable. It was disappointing even for a budget airline.

Charging $74 for one checked bag is outrageous. I will never fly Frontier again.

Boarding was very well executed. Got my bag right away.

Book cheap flights from Islip to Illinois

Recent round-trip flight deals

 
These are the cheapest round-trip flights from Islip to Illinois found on KAYAK in the last 72 hours.
2/19Wed
1 stopFrontier
11h 05mISP-ORD
2/26Wed
1 stopFrontier
9h 40mORD-ISP
$105
3/10Mon
1 stopFrontier
27h 45mISP-STL
3/12Wed
1 stopFrontier
25h 40mSTL-ISP
$120
3/1Sat
1 stopFrontier
10h 36mISP-ORD
3/5Wed
1 stopFrontier
9h 40mORD-ISP
$130
2/28Fri
1 stopFrontier
7h 46mISP-ORD
3/2Sun
1 stopFrontier
7h 57mORD-ISP
$150
2/19Wed
1 stopFrontier
11h 05mISP-ORD
2/24Mon
1 stopFrontier
12h 33mORD-ISP
$235
3/13Thu
1 stopFrontier
12h 51mISP-ORD
3/17Mon
1 stopFrontier
10h 24mORD-ISP
$238
4/30Wed
1 stopSouthwest
6h 40mISP-ORD
5/1Thu
1 stopSouthwest
5h 30mORD-ISP
$335
2/7Fri
3 stops
21h 38mISP-ORD
2/9Sun
2 stops
12h 29mORD-ISP
$336
3/1Sat
2 stopsSouthwest
10h 30mISP-ORD
3/5Wed
1 stopSouthwest
4h 50mORD-ISP
$340
2/17Mon
1 stopSouthwest
4h 50mISP-ORD
2/20Thu
1 stopSouthwest
4h 35mORD-ISP
$342

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Recent one-way flight deals

 
Only flying one-way? Below are some of the best one-way flight deals from Islip to Illinois found on KAYAK in the last 72 hours.
2/21Fri
1 stopFrontier
7h 46mISP-ORD
$65
2/7Fri
1 stopFrontier
11h 48mISP-STL
$71
3/16Sun
1 stopFrontier
11h 53mISP-ORD
$99
1/31Fri
1 stopFrontier
9h 14mISP-ORD
$135
4/17Thu
1 stopFrontier
8h 02mISP-ORD
$153
1/26Sun
1 stopFrontier
13h 50mISP-ORD
$171
2/24Mon
1 stopFrontier
7h 56mISP-ORD
$183
5/31Sat
1 stopJetBlue
5h 03mISP-ORD
$206
3/3Mon
1 stopFrontier
7h 56mISP-ORD
$213
4/19Sat
1 stopFrontier
6h 51mISP-ORD
$350

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Last minute flights from Islip to Illinois

Last minute flight, train and bus deals

 
These last-minute flight deals are the cheapest flights found on KAYAK in the last 72 hours for flights from Islip to Illinois that are departing in the next 10 days.
1/24Fri
multi-stopFrontier
9h 14mISP-ORD
1/26Sun
multi-stopFrontier
7h 13mORD-ISP
$730
1/24Fri
multi-stopFrontier
11h 48mISP-STL
1/26Sun
multi-stopFrontier
9h 50mSTL-ISP
$750
1/24Fri
multi-stopFrontier
9h 14mISP-ORD
1/26Sun
multi-stopFrontier
7h 13mORD-ISP
$750
1/25Sat
multi-stopSouthwest
9h 45mISP-STL
1/27Mon
multi-stopSouthwest
4h 20mSTL-ISP
$767
1/25Sat
multi-stopSouthwest
8h 30mISP-STL
1/27Mon
multi-stopSouthwest
8h 00mSTL-ISP
$772
1/25Sat
multi-stopSouthwest
10h 45mISP-STL
1/27Mon
multi-stopSouthwest
8h 00mSTL-ISP
$777
1/23Thu
multi-stopFrontier
11h 48mISP-STL
1/26Sun
multi-stopFrontier
9h 50mSTL-ISP
$905

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

Information on your arrival and departure airports

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