Question : Have you considered flying out of an airport besides Long Island MacArthur Airport (ISP)?
Answer : Long Island MacArthur Airport is a terrific airport, but in getting you to Ibiza, there is a lower cost option – Westchester County Airport. It's just 37 miles away and flights are being priced 62% cheaper over the next few months.
Question : How long do most people visit Ibiza?
Answer : Of course you're not most people, but if you were, you'd stay roughly one week.
Question : Will you do what it takes to get the absolute cheapest flight?
Answer : For the month of February, the cheapest day to fly is Saturday. Flexibility is paramount when booking travel plans in order to keep travel costs down.