To save on the cost of your flight from Islip, New York to Lancaster, book at least 53 days before your planned departure. Booking around this time can save you about 111% on the cost of this flight compared to booking a flight leaving this week. We have found prices from $350 if you need a flight within two weeks. For flights within the next 72 hours, you can find tickets from as low as $499.
Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Islip, New York to Lancaster as you normally would.