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In page Air Berlin:

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In contrast to European pure low-cost carriers, Air Berlin offered free in-flight snacks and drinks until September 2016.[1] Newspapers and magazines were available on domestic German flights.[2] Full hot meals were complimentary on long-haul flights. On all Air Berlin routes with a flight time of 60 minutes or longer, gourmet meals were offered, which were, according to the airline, created by chefs at "Sansibar", a famous restaurant on the island of Sylt. The airline also offered in-flight entertainment, assigned seating and guaranteed flight connections.[3] Air Berlin's basic fares were nonrefundable and not changeable, so unused flights were a complete loss for the purchaser.