 Upon completion of his two-year pact with Lukko, Kähkönen agreed to a two-year, entry-level contract with his draft club, the Minnesota Wild, on 17 May 2018.In his second year in North America, Kähkönen was recalled by the Wild during the 2019–20 season from AHL affiliate, the Iowa Wild, on 20 November 2019.After serving as backup for two games, he became just the fourth Minnesota Wild goalie to be given a start for his NHL debut against the New Jersey Devils at the Prudential Center on 26 November 2019.