MSC offers interline discounts on select sailings to Vacations To Go customers who are currently employed with a domestic or international commercial passenger airline, Federal Aviation Administration (FAA), National Air Traffic Controllers Association (NATCA), Worldspan, Sabre, Galileo and Amadeus. The member/employee must cruise with immediate family in order to receive the discount. Qualifying guests must present an I.D. badge from their respective company at the pier. Offer is valid for U.S. residents only.