Through March 31, 2012, airberlin topbonus members can earn not only bonus miles at select hotels, but special offers like a free dinner and free upgrade. For stays of three nights or more at the Mallorca Marriott, members can get 1,000 award miles and a free dinner. For stays at Dorint Hotels & Resorts, you can get 1,000 award miles and a free room upgrade. Visit http://www.airberlin.com/topbonus and InsideFlyer’s Bonus Bulletin for more detailed information and more offers.

In other airberlin news, the airline will become a full member of the oneworld alliance on March 20, 2012, adding almost 70 destinations to oneworld and extending the alliance’s global coverage to some 840 destinations in 150 countries.