Days after the Lufthansa Group closed its purchase of 41% of Italy's ITA Airways, the group began the process of combining with the airline.

With immediate effect, 36 million Miles & More members can earn and redeem miles on all ITA Airways flights. At the same time, the 2.7 million members of the ITA Airways frequent flyer program Volare can earn and redeem their points on all flights operated by Lufthansa, SWISS, Austrian Airlines and Brussels Airlines.

Germany's Lufthansa will start making money from its investment in ITA Airways from this year, the chief executive of the German carrier, Carsten Spohr, said on Monday.

Lufthansa Group remains a minority shareholder in Italy’s national carrier, but it’s already leveraging the benefits of its 41% stake.