Lásková represented the Czech Republic at the IIHF Women's U18 World Championships in 2012, 2013, and 2014, winning a bronze medal at the 2014 tournament. She first appeared with the Czech senior national team at the final qualification for the women's ice hockey tournament at the 2014 Winter Olympics. She has since appeared with the national team at the 2013 IIHF Women's World Championship, the 2014 IIHF Women's World Championship Division IA and Top Division Playoff, and the 2021 IIHF Women's World Championship.