BERLIN, 2014-12-23 — /Travel PR News/ — topbonus, the frequent flyer program of airberlin, has been awarded top honours at this year’s Premier Traveler award gala held in Los Angeles, California. topbonus was bestowed the honour of “Best International Frequent Flyer Program” by the reader’s choice award 2014. Premier Traveler readers were invited to participate… Read the full press release