Celebrity offers interline discounts on select sailings to Vacations To Go customers who are currently employed with a domestic or international commercial passenger airline, Federal Express, Astar Air Cargo, or United Parcel Service (UPS). These guests may book up to two staterooms at the interline discount. The following guests are eligible to book one stateroom at the interline discount; Spouse or Parent of an airline employee (as listed above), and employees of Sabre, Worldspan, Galileo/Apollo, or Amadeus. Retired airline employees are also eligible provided the airline is still in operation (e.g. retired employees of Pan American Airways do not qualify). Qualifying employees must present an I.D. badge from their respective company at the pier. Please note that interline rates are for new bookings only.