Cheap flights from St. Louis to Islip (STL - ISP)
What is the cheapest day to fly round-trip from St. Louis to Islip, New York?
Departing on a Monday is a good option for securing a great price. You can expect to save up to 56% when planning your travel around this day of the week.
How far in advance should I book a flight from St. Louis to Islip, New York?
When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 31 days in advance, which can save you up to 56% on flights from St. Louis to Islip, New York compared to booking the week you need them. Waiting 31 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 $363. For sooner than that we have options available in the next 3 days from $473.
What is the cheapest month to fly from St. Louis to Islip, New York?
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 $308 on average during February, but can be found for as low as $197.
When is the cheapest time to fly from St. Louis to Islip, New York (STL - ISP)?
A simple way to save on the total cost of your ticket is to fly from St. Louis to Islip, New York at noon. If you’re flexible enough to do this you can expect to save up to 50% on your trip compared to booking a flight in the morning.
Cheap flights from St. Louis to Islip in February, March 2023
The best prices found for STL to ISP flights for February, March
Lambert-St Louis
Islip Long Island
1 stop
18h 16mIslip Long Island
Lambert-St Louis
1 stop
9h 07mMultiple Airlines
St. Louis to Islip 2023 flight deals
Cheap flights to Islip from St. Louis found for this year
Lambert-St Louis
Islip Long Island
1 stop
18h 16mIslip Long Island
Lambert-St Louis
1 stop
9h 07mMultiple Airlines
Lambert-St Louis
Islip Long Island
1 stop
11h 23mIslip Long Island
Lambert-St Louis
1 stop
7h 21mMultiple Airlines
Related info for your journey
Useful info, stats and facts about St. Louis to Islip flights.
Which airlines flying from Lambert-St Louis to Islip Long Island have flexible changes due to COVID-19?
Some of our airline partners flying from Lambert-St Louis to Islip Long Island have new flexible policies in place due to COVID-19. American Airlines is one of the carriers where you may find flexible change policies. You can use our site to filter for airlines like American Airlines with this kind of flexibility.
Can I find flights from St. Louis to Islip, New York for under $300 on Cheapflights?
Yes, there are multiple flights from St. Louis to Islip, New York for under $300. The cheapest flight booked recently is on Multiple Airlines for just $247, but on average you can expect to pay $285.
What are the cheapest flights from St. Louis to Islip, New York?
Looking for the cheapest flight from St. Louis to Islip, New York? While on average our users pay $3,056, our data indicates the cheapest price to be $153. The most popular route (Lambert-St Louis - Islip Long Island), is priced around $287.