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.
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.
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.
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.
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.
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.
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.