After winning another Korean national title, Cha competed at the 2020 Four Continents Championships, held in Seoul. He earned a season's best in the short program despite underrotating his triple Axel attempt. In the free skate, four of his jumps were called underrotated, which was sufficient to keep him off the podium at the event. Cha was supposed to represent South Korea at World Figure Skating Championship 2020 but the competition was cancelled due to coronavirus pandemic.