The Yankees drafted Jeter out of high school in 1992, and he debuted in the major leagues at age 21 in 1995. The following year, he became the Yankees' starting shortstop, won the Rookie of the Year Award, and helped the team win the 1996 World Series.
What you want is an open return ticket. The outgoing flight is confirmed and the return is open. Depending on the type of ticket, the return can be up to a year after departure. You can book the return ticket after departure--subject to availability of course.
How to book: Promo codes can only be redeemed online at jetblue.com/promo. Search flights within travel dates listed in promo code offer details. For roundtrip flights, both outbound and return dates must fall within offer period in order for discount to apply. Enter code in promo code field exactly as it appears (case sensitive). You must select flights in order for discount to appear.