Partnerships are expanding at airberlin. Members of topbonus will now earn 500 miles per stay at Hilton Family hotels and the partnership with Marriott International has expanded to include properties worldwide. Until July 31, 2008, when you book a three-night weekend stay at Marriott, JW Marriott, Renaissance or Courtyard by Marriott hotels in continental Europe, you will get one night free. For full information, visit http://www.airberlin.com/marriott2