$95 Cheap Flights from St. Louis to Islip
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Flights from St. Louis to Islip
Cheap flight deals from St. Louis to Islip
We've found these cheap flights for you. You can book one-way or round-trip flight tickets.
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Round-trip
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One way
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Cheapest nonstop
SZX 9:15 PM2h 40mNonstopLYA 11:55 PMShenzhen - Luoyang | Sat, May 10 | China Southern Airlines$77 $1,71696% OFF96% OFF$1,716 $77 -
SZX 9:15 PM2h 40mNonstopLYA 11:55 PMShenzhen - Luoyang | Sat, May 17 | China Southern Airlines$77 $1,71696% OFF96% OFF$1,716 $77
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STL 4:57 PM14h 13m1 stopsISP 8:10 AMSt. Louis - Islip | Sat, Apr 12 | Frontier Airlines
ISP 7:18 PM29h 28m1 stopsSTL 11:46 PMIslip - St. Louis | Wed, Apr 16 | Frontier Airlines$286 $1,71683% OFF83% OFF$1,716 $286 -
STL 5:41 PM15h 19m1 stopsISP 10:00 AMSt. Louis - Islip | Tue, Apr 22 | Frontier Airlines
ISP 2:08 PM10h 56m1 stopsSTL 12:04 AMIslip - St. Louis | Mon, Apr 28 | Frontier Airlines$48272% OFF$1,716 $482
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STL 5:40 AM9h 40m1 stopsISP 4:20 PMSt. Louis - Islip | Sat, May 10 | Southwest Airlines
ISP 6:10 AM18h 20m1 stopsSTL 11:30 PMIslip - St. Louis | Sun, May 11 | Southwest Airlines$1,47614% OFF$1,716 $1,476 -
STL 1:00 PM17h 25m1 stopsISP Invalid DateSt. Louis - Islip | Mon, Apr 14 | Normal Airline
ISP 3:00 PM6hNonstopSTL 4:00 PMIslip - St. Louis | Wed, Apr 16 | Normal AirlineFind More FlightsFind More Flights
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STL 6:10 PM22h 49m1 stopsISP 5:59 PMSt. Louis - Islip | Tue, Apr 29 | Spirit Airlines$95 $37575% OFF75% OFF$375 $95 -
STL 5:41 PM15h 19m1 stopsISP 10:00 AMSt. Louis - Islip | Mon, Apr 28 | Frontier Airlines$97 $37574% OFF74% OFF$375 $97
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STL 5:45 PM15h 27m1 stopsISP 10:12 AMSt. Louis - Islip | Wed, May 14 | Frontier Airlines$100 $37573% OFF73% OFF$375 $100
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STL 5:55 PM15h 46m1 stopsISP 10:41 AMSt. Louis - Islip | Fri, May 2 | Frontier Airlines$10273% OFF$375 $102
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STL 6:10 PM22h 48m1 stopsISP 5:58 PMSt. Louis - Islip | Thu, May 1 | Spirit Airlines$12467% OFF$375 $124
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STL 5:41 PM15h 19m1 stopsISP 10:00 AMSt. Louis - Islip | Tue, Apr 29 | Frontier Airlines$13464% OFF$375 $134
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STL 5:45 PM15h 27m1 stopsISP 10:12 AMSt. Louis - Islip | Thu, May 1 | Frontier Airlines$14063% OFF$375 $140
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STL 5:41 PM15h 19m1 stopsISP 10:00 AMSt. Louis - Islip | Sat, Apr 26 | Frontier Airlines$16855% OFF$375 $168
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STL 5:41 PM15h 19m1 stopsISP 10:00 AMSt. Louis - Islip | Fri, Apr 25 | Frontier Airlines$17653% OFF$375 $176
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STL 9:10 AM11h 18m1 stopsISP 9:28 PMSt. Louis - Islip | Wed, May 14 | American Airlines$32214% OFF$375 $322 -
STL 1:00 PM17h 25m1 stopsISP Invalid DateSt. Louis - Islip | Mon, Apr 14 | Normal AirlineFind More FlightsFind More Flights
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Crossed out prices are calculated based on the average price of the corresponding route on Trip.com.
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Frequently Asked Questions
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When are flight tickets from St. Louis (STL) to Islip (ISP) the cheapest?
Airlines adjust prices for flights from St. Louis to Islip based on the departure date and time of your selection. By analyzing data from all airlines, we've discovered that on Trip.com, you can find the lowest flight prices on Tuesdays, Wednesdays, and Saturdays. -
How much do flights from St. Louis (STL) to Islip (ISP) cost?
According to Trip.com's data, the lowest price is around $335.
How to find a cheap flight from St. Louis to Islip
Wait until the last minute and flight costs are often sky-high. Plan ahead, book the right way, and your savings can soar. We have loads of saving tips to help you find a cheap flight from St. Louis to Islip. Book your flights at the right time and save more.
Be flexible with your travel dates to get the cheapest St. Louis to Islip ticket.
Tap "Date" in the flight search bar to browse the calendar and find airfare from St. Louis to Islip for the next six months in 2025. If you're looking to fly within the next three months, the lowest fare is $95 for a one-way ticket on Tue, Apr 29.
Compare cheap St. Louis to Islip flight deals from hundreds of airlines.
Our powerful search system compares prices from over 500 airlines. So you can find the cheapest flights from St. Louis to Islip. The most affordable airline currently operating on this route is Spirit Airlines.
Set up a Price Alert to track fare drops.
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Book early or wait unitl the last minute to fine the best fares.
It's always better to book early! Airlines typically release their lowest fares about a year before departure, so check as soon as flights become available. If you miss that window, you may still find great deals closer to your travel date.
Search for flights on the go.
For the best booking experience on the go, download Trip.com and search for cheap flights from St. Louis to Islip to access exclusive deals just for you.
Flight Info | St. Louis to Islip
| Cheapest one-way flight price | $94 |
|---|---|
| Off-season for travel | March |
| Peak season for travel | January |
| Flight distance | 1,478.87 km |
| Popular airline | Frontier Airlines |
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