As of 8 March 2015 airberlin and topbonus welcome Alitalia as a strong new airline partner. For flights from 8 March until 31 May 2015, topbonus members can collect additional topbonus award miles on selected airberlin & Alitalia flights: •500 extra award miles in Economy Class •1,000 extra award miles in Business Class* Don't forget: a one-off registration is required by 31 May 2015 in order to participate.