Norwegian 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, DHL Worldwide Express or United Parcel Service (UPS). Retired airline employees and are also eligible. These discounts also apply to the eligible employee's parents, spouse, grandparents, children, siblings, grandchildren and parents in-law as long as the eligible employee is also sailing. A maximum of two staterooms are permitted per interline eligible guest. Qualifying employees must present an I.D. badge from their respective company at the pier.