Travelers have found it’s best to book a flight 38 days in advance to save up to 26% compared to booking the same week of travel. As your travel date approaches, the cost of this flight route may potentially increase. While opting to book 38 days out may not be an option for all, there are still additional ways to secure a deal in the near future. You might find a flight from Islip, New York to Barcelona 1-2 weeks in advance for as low as $519, or $579 for flights within the next 24 hours.
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 Barcelona as you normally would.