When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 32 days in advance, which can save you up to 58% on flights from St. Louis to Islip, New York compared to booking the week you need them. Waiting 32 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 $311. For sooner than that we have options available in the next 3 days from $450.
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.
Departing on a Monday is a good option for securing a great price. You can expect to save up to 38% when planning your travel around this day of the week.