The Italian Olympic Committee announced the move on Wednesday, having decided a joint bid was more cost effective. It was unanimously voted for by the CONI board.
Milan Mayor Giuseppe Sala, however, has criticized the decision and says that while his city would still be willing to host Olympic events, it will not be involved in the governance of the bid.
Cortina would have the same number of competitions, with the sliding sports (bobsleigh, skeleton and luge) and Alpine skiing, while the Nordic combined and ski jumping would be held in nearby Val di Fiemme.
Two years ago, Italy was forced to suspend Rome’s bid for the 2024 Summer Olympics because of staunch opposition from the city’s mayor.