When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 39 days in advance, which can save you up to 114% on flights from St. Louis to Islip, New York compared to booking the week you need them. Waiting 39 days out may not be for everyone, so we have options available for flights within the next two weeks, with the lowest price starting at $279. For sooner than that we have options available in the next 3 days from $560.
Due to multiple factors, expect to potentially pay more when booking in June. For low rates, February can be a great choice for travel to Islip, New York. Flights to Islip, New York from St. Louis in February are about $292 on average during February, but can be found for as low as $114.
When flying from St. Louis to Islip, New York, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.
Fly from
Fly to
Budget
$180 - $329
Route
Depart
Return
Price
Lambert-St LouisIslip Long Island
STL - ISP
STLISP
Lambert-St Louis
Tue 6/4
1 stop10h 56m
Islip Long Island
Tue 6/11
1 stop10h 32m
Lambert-St LouisIslip Long Island
STL - ISP
STLISP
Lambert-St Louis
Tue 6/4
1 stop10h 56m
Islip Long Island
Thu 6/6
1 stop9h 44m
Lambert-St LouisIslip Long Island
STL - ISP
STLISP
Lambert-St Louis
Sun 6/2
1 stop11h 29m
Islip Long Island
Wed 6/5
1 stop15h 22m
Lambert-St LouisIslip Long Island
STL - ISP
STLISP
Lambert-St Louis
Fri 6/14
1 stop10h 56m
Islip Long Island
Mon 6/17
1 stop15h 21m
Lambert-St LouisIslip Long Island
STL - ISP
STLISP
Lambert-St Louis
Fri 6/14
1 stop10h 56m
Islip Long Island
Mon 6/17
1 stop15h 21m
Lambert-St LouisIslip Long Island
STL - ISP
STLISP
Lambert-St Louis
Mon 5/27
1 stop9h 53m
Islip Long Island
Thu 5/30
1 stop9h 41m
Comfort
Entertainment
Boarding
Crew
Food
Overall
Reviews
Our flight was delayed causing us to miss our connecting flight. The staff was not helpful in helping us find alternatives. We cancelled our flight and had to book our way home using another airline.
Comfort
Entertainment
Boarding
Crew
Food
Overall
Reviews
Our flight was delayed causing us to miss our connecting flight. The staff was not helpful in helping us find alternatives. We cancelled our flight and had to book our way home using another airline.
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