Sometimes cruise lines offer special discounts to Vacations To Go customers who are employees of a domestic or international commercial passenger airline. Employees of other cruise lines, Amtrak, Federal Express, DHL, United Parcel Service (UPS), Worldspan, Sabre, Galileo/Apollo, Amadeus, and members of the Airline Pilots' Association (ALPA), Federal Aviation Administration (FAA), International Airlines Travel Agent Network (IATAN) and National Air Traffic Controllers Association (NATCA) may also be eligible. In some cases, the spouse, parents, parents-in-law and dependent children may book one stateroom if the interline eligible guest is not traveling. Retired airline and cruise line employees may also be eligible. You must present proper documentation at the time of booking to qualify.