Filigno made her senior debut for Canada on January 16, 2008, at an age of 17. She played for Canada at the 2008 Olympics and 2011 FIFA Women's World Cup. At the 2012 Olympics, Filigno scored the winning goal against Great Britain in the knockout stage of the tournament, a stunning volley from a Sophie Schmidt corner kick. She was subsequently awarded an Olympic bronze medal after Canada defeated France in the Third Place match. Filigno made her last appearance for the national team at the 2015 FIFA Women's World Cup and officially retired from international football in 2017.