Are you a number of the club want to book a free Delta flight on next trip? Delta Airlines has a loyalty flyer program for frequnent travelers. once a member.then are earn miles and redeem then on flight booking . Morevover one can register to be part of mermbership . Delta skymiles members can dial 1(800) 221-1212 and speak with a customer sevice exective to know about how many Delta miles for a free flight.?