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 (FEDEX), Airborne Express, or United Parcel Service (UPS), DHL, Air Traffic Controllers (NATCA & CATCA) & GDS Employees ((CRS) employees of Sabre, Worldspan, Galileo/Apollo, or Amadeus). These guests may book up to three staterooms at the interline discount. When an eligible airline employee is not travelling, their spouse/domestic partner or parents would deem eligible for their Interline benefits. Retired employees from a domestic or international commercial passenger airline, Federal Express (FEDEX), Airborne Express (ABX Air), United Parcel Service (UPS), DHL, Air Traffic Controllers (NATCA & CATCA), or GDS 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.