$126+ Cheap flights from St. Louis to Islip, NY (STL - ISP)
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 6/23. Fares are subject to change and may not be available on all flights or dates of travel.
STL — ISP
Jun 28 — Jul 51
Round-trip
1 adult, Economy
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Find cheap flights from St. Louis to Islip with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from St. Louis to Islip
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Best
Last-minute
One-way
Cheapest flights from St. Louis to IslipExplore the most affordable flight options available from St. Louis to Islip. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 29, 2026.
Explore the most affordable flight options available from St. Louis to Islip. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 29, 2026.
This Booking.com deal was found by Cheapflights users on 5/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/144:17 pm
STL
- ISP
1 stop27h 40m
Frontier
Wed 6/179:52 pm
ISP
- STL
1 stop26h 57m
Frontier
Deal found 5/25![Frontier logo]()
$282
This Southwest deal was found by Cheapflights users on 5/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/92:50 pm
STL
- ISP
1 stop7h 55m
Southwest
Tue 7/142:55 pm
ISP
- STL
1 stop5h 20m
Southwest
Deal found 5/28![Southwest logo]()
$296
This Booking.com deal was found by Cheapflights users on 5/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/214:17 pm
STL
- ISP
1 stop27h 40m
Frontier
Fri 6/269:52 pm
ISP
- STL
1 stop26h 57m
Frontier
Deal found 5/27![Frontier logo]()
$301
This Booking.com deal was found by Cheapflights users on 5/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/34:19 pm
STL
- ISP
1 stop16h 46m
Frontier
Wed 6/179:52 pm
ISP
- STL
1 stop26h 57m
Frontier
Deal found 5/27![Frontier logo]()
$313
This Booking.com deal was found by Cheapflights users on 5/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/811:38 am
STL
- ISP
1 stop27h 18m
Frontier
Fri 6/129:52 pm
ISP
- STL
1 stop26h 57m
Frontier
Deal found 5/24![Frontier logo]()
$323
This Southwest deal was found by Cheapflights users on 5/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/235:20 pm
STL
- ISP
1 stop5h 20m
Southwest
Mon 7/275:50 pm
ISP
- STL
1 stop6h 25m
Southwest
Deal found 5/28![Southwest logo]()
$328
This Booking.com deal was found by Cheapflights users on 5/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/24:19 pm
STL
- ISP
1 stop16h 46m
Frontier
Tue 6/164:41 pm
ISP
- STL
1 stop8h 08m
Frontier
Deal found 5/27![Frontier logo]()
$353
This Southwest deal was found by Cheapflights users on 5/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/85:50 am
STL
- ISP
1 stop5h 00m
Southwest
Fri 6/1212:30 pm
ISP
- STL
2 stops7h 00m
Southwest
Deal found 5/24![Southwest logo]()
$416
This Booking.com deal was found by Cheapflights users on 5/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/294:19 pm
STL
- ISP
1 stop16h 46m
Frontier
Sun 5/3111:00 am
ISP
- STL
1 stop13h 57m
Frontier
Deal found 5/25![Frontier logo]()
$424
Best flights from St. Louis to IslipDiscover carefully curated flight deals from St. Louis to Islip that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated May 29, 2026.
Discover carefully curated flight deals from St. Louis to Islip that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated May 29, 2026.
This Booking.com deal was found by Cheapflights users on 5/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/214:17 pm
STL
- ISP
1 stop27h 40m
Frontier
Fri 6/269:52 pm
ISP
- STL
1 stop26h 57m
Frontier
Deal found 5/27![Frontier logo]()
$301
This Southwest deal was found by Cheapflights users on 5/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/92:50 pm
STL
- ISP
1 stop7h 55m
Southwest
Tue 7/142:55 pm
ISP
- STL
2 stops8h 35m
Southwest
Deal found 5/28![Southwest logo]()
$301
This Southwest deal was found by Cheapflights users on 5/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/235:20 pm
STL
- ISP
1 stop5h 20m
Southwest
Mon 7/275:50 pm
ISP
- STL
1 stop6h 25m
Southwest
Deal found 5/28![Southwest logo]()
$328
This Southwest deal was found by Cheapflights users on 5/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/110:30 am
STL
- ISP
2 stops11h 05m
Southwest
Mon 7/65:20 am
ISP
- STL
1 stop8h 20m
Southwest
Deal found 5/24![Southwest logo]()
$478
This Southwest deal was found by Cheapflights users on 5/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/114:35 pm
STL
- ISP
2 stops6h 00m
Southwest
Sun 6/143:30 pm
ISP
- STL
1 stop8h 05m
Southwest
Deal found 5/28![Southwest logo]()
$479
This Southwest deal was found by Cheapflights users on 5/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/216:00 am
STL
- ISP
2 stops7h 55m
Southwest
Fri 6/2612:30 pm
ISP
- STL
2 stops7h 00m
Southwest
Deal found 5/27![Southwest logo]()
$487
This Southwest deal was found by Cheapflights users on 5/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/146:00 am
STL
- ISP
2 stops7h 55m
Southwest
Wed 6/1712:25 pm
ISP
- STL
2 stops9h 00m
Southwest
Deal found 5/25![Southwest logo]()
$507
Last-minute flights from St. Louis to IslipDiscover last-minute flight deals from St. Louis to Islip. Data last updated May 29, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Islip. Data last updated May 29, 2026 and is based on user searches.
This Booking.com deal was found by Cheapflights users on 5/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/294:19 pm
STL
- ISP
1 stop16h 46m
Frontier
Sun 5/3111:00 am
ISP
- STL
1 stop13h 57m
Frontier
Deal found 5/25![Frontier logo]()
$424
This Booking.com deal was found by Cheapflights users on 5/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/24:19 pm
STL
- ISP
1 stop16h 46m
Frontier
Tue 6/164:41 pm
ISP
- STL
1 stop8h 08m
Frontier
Deal found 5/27![Frontier logo]()
$353
This Booking.com deal was found by Cheapflights users on 5/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/34:19 pm
STL
- ISP
1 stop16h 46m
Frontier
Wed 6/179:52 pm
ISP
- STL
1 stop26h 57m
Frontier
Deal found 5/27![Frontier logo]()
$313
This Booking.com deal was found by Cheapflights users on 5/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/811:38 am
STL
- ISP
1 stop27h 18m
Frontier
Fri 6/129:52 pm
ISP
- STL
1 stop26h 57m
Frontier
Deal found 5/24![Frontier logo]()
$323
This Southwest deal was found by Cheapflights users on 5/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/85:50 am
STL
- ISP
1 stop5h 00m
Southwest
Fri 6/1212:30 pm
ISP
- STL
2 stops7h 00m
Southwest
Deal found 5/24![Southwest logo]()
$416
This Southwest deal was found by Cheapflights users on 5/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/114:35 pm
STL
- ISP
2 stops6h 00m
Southwest
Sun 6/143:30 pm
ISP
- STL
1 stop8h 05m
Southwest
Deal found 5/28![Southwest logo]()
$479
This Booking.com deal was found by Cheapflights users on 5/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/144:17 pm
STL
- ISP
1 stop27h 40m
Frontier
Wed 6/179:52 pm
ISP
- STL
1 stop26h 57m
Frontier
Deal found 5/25![Frontier logo]()
$282
This Southwest deal was found by Cheapflights users on 5/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/146:40 am
STL
- ISP
1 stop4h 05m
Southwest
Wed 6/172:55 pm
ISP
- STL
2 stops8h 30m
Southwest
Deal found 5/25![Southwest logo]()
$429
This Booking.com deal was found by Cheapflights users on 5/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/214:17 pm
STL
- ISP
1 stop27h 40m
Frontier
Fri 6/269:52 pm
ISP
- STL
1 stop26h 57m
Frontier
Deal found 5/27![Frontier logo]()
$301
This Southwest deal was found by Cheapflights users on 5/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/218:55 pm
STL
- ISP
1 stop12h 35m
Southwest
Fri 6/2612:30 pm
ISP
- STL
2 stops7h 00m
Southwest
Deal found 5/27![Southwest logo]()
$438
One-way flights from St. Louis to IslipSearch for one-way flight options from St. Louis to Islip. Find affordable one-way fares based on user searches. Data last updated May 29, 2026.
Search for one-way flight options from St. Louis to Islip. Find affordable one-way fares based on user searches. Data last updated May 29, 2026.
This Booking.com deal was found by Cheapflights users on 5/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/234:17 pm
STL
- ISP
1 stop27h 40m
Frontier
Deal found 5/27![Frontier logo]()
$126
This Trip.com deal was found by Cheapflights users on 5/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/174:09 pm
STL
- ISP
1 stop16h 44m
Frontier
Deal found 5/24![Frontier logo]()
$145
This Booking.com deal was found by Cheapflights users on 5/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/124:09 pm
STL
- ISP
1 stop16h 44m
Frontier
Deal found 5/24![Frontier logo]()
$147
This Southwest deal was found by Cheapflights users on 5/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/233:15 pm
STL
- ISP
2 stops6h 20m
Southwest
Deal found 5/27![Southwest logo]()
$211
This Southwest deal was found by Cheapflights users on 5/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/182:40 pm
STL
- ISP
1 stop7h 20m
Southwest
Deal found 5/24![Southwest logo]()
$219
This Southwest deal was found by Cheapflights users on 5/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/174:35 pm
STL
- ISP
2 stops6h 05m
Southwest
Deal found 5/24![Southwest logo]()
$224
This Southwest deal was found by Cheapflights users on 5/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/126:00 am
STL
- ISP
2 stops7h 55m
Southwest
Deal found 5/24![Southwest logo]()
$234
This Kiwi.com deal was found by Cheapflights users on 5/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/238:08 pm
STL
- ISP
3 stops16h 25m
Multiple Airlines
Deal found 5/27![Multiple Airlines logo]()
$244
This Kiwi.com deal was found by Cheapflights users on 5/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/172:00 pm
STL
- ISP
3 stops51h 06m
Multiple Airlines
Deal found 5/24![Multiple Airlines logo]()
$259
This Kiwi.com deal was found by Cheapflights users on 5/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/126:34 pm
STL
- ISP
3 stops41h 54m
Multiple Airlines
Deal found 5/24![Multiple Airlines logo]()
$283
This Kiwi.com deal was found by Cheapflights users on 5/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/188:08 pm
STL
- ISP
3 stops40h 20m
Multiple Airlines
Deal found 5/24![Multiple Airlines logo]()
$322
This Kiwi.com deal was found by Cheapflights users on 5/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/49:06 pm
STL
- ISP
3 stops37h 11m
Multiple Airlines
Deal found 5/29![Multiple Airlines logo]()
$415
Find flight deals from St. Louis to Islip
Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Islip (ISP). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated May 29, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $282 (Booking.com) |
One-way from | $126 (Booking.com) |
Popular in | November |
Cheapest in | August |
Average price | $356 |
Cheapflights Fare Finder
Customize your flight search to find flights from St. Louis to Islip that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated May 29, 2026.
Use the filters below to find and compare flights from St. Louis to Islip that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
St. LouisIslip
STL - ISP
STLISP
Lambert-St Louis
Sun 6/21
4:17 pm-8:57 pm
1 stop27h 40m
Islip Long Island
Fri 6/26
9:52 pm-11:49 pm
1 stop26h 57m
$301
St. LouisIslip
STL - ISP
STLISP
Lambert-St Louis
Thu 7/9
2:50 pm-11:45 pm
1 stop7h 55m
Islip Long Island
Tue 7/14
2:55 pm-10:30 pm
2 stops8h 35m
$301
Quickest round-trip
St. LouisIslip
STL - ISP
STLISP
Lambert-St Louis
Thu 7/23
5:20 pm-11:40 pm
1 stop5h 20m
Islip Long Island
Mon 7/27
5:50 pm-11:15 pm
1 stop6h 25m
$328
St. LouisIslip
STL - ISP
STLISP
Lambert-St Louis
Wed 7/1
10:30 am-10:35 pm
2 stops11h 05m
Islip Long Island
Mon 7/6
5:20 am-12:40 pm
1 stop8h 20m
$478
St. LouisIslip
STL - ISP
STLISP
Lambert-St Louis
Thu 6/11
4:35 pm-11:35 pm
2 stops6h 00m
Islip Long Island
Sun 6/14
3:30 pm-10:35 pm
1 stop8h 05m
$479
St. LouisIslip
STL - ISP
STLISP
Lambert-St Louis
Sun 6/21
6:00 am-2:55 pm
2 stops7h 55m
Islip Long Island
Fri 6/26
12:30 pm-6:30 pm
2 stops7h 00m
$487
St. LouisIslip
STL - ISP
STLISP
Lambert-St Louis
Sun 6/14
6:00 am-2:55 pm
2 stops7h 55m
Islip Long Island
Wed 6/17
12:25 pm-8:25 pm
2 stops9h 00m
$507
Cheapest one-way
St. LouisIslip
STL - ISP
STLISP
Lambert-St Louis
Tue 6/23
4:17 pm-8:57 pm
1 stop27h 40m
$126
St. LouisIslip
STL - ISP
STLISP
Lambert-St Louis
Fri 6/5
4:19 pm-10:15 am
1 stop16h 56m
$197
St. LouisIslip
STL - ISP
STLISP
Lambert-St Louis
Tue 6/23
3:15 pm-10:35 pm
2 stops6h 20m
$211
Showing 1-10 of 18 resultsSorted by cheapest first
Compare providers for flights from St. Louis to Islip
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from St. Louis to Islip in May.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on St. Louis-Islip, New York flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on St. Louis-Islip, New York flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from St. Louis-Islip, New York flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on St. Louis-Islip, New York flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for St. Louis-Islip, New York flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
Best time to book a flight from St. Louis to Islip
Have a flexible travel schedule? Discover the best time to fly to Islip from St. Louis with our price prediction graph.
STL-ISP
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Reviews of airlines servicing Islip
Get insights into the airlines that provide service to Islip. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Islip. Reviews last updated May 29, 2026.
Peruse reviews from past customers who have flown with Southwest from St. Louis to Islip to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Comfort
8.0
Food
7.0
Boarding
8.1
Entertainment
7.5
Overall
8.0
Crew
8.6
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Comfort
8.0
Food
7.0
Boarding
8.1
Entertainment
7.5
Overall
8.0
Crew
8.6
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Related info for your journey
Find useful and relevant information for your journey from St. Louis to Islip. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Traveling to a place near Islip?
Book flights to Islip if you plan to visit one of these locationsRiverhead
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St. Louis and Islip flights
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Top airline flying from St. Louis to Islip
Discover the top airline that operate flights from St. Louis to Islip. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated May 29, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$218 | Average$403 | FlexibilityNo cancel fee | On-time63% |