Initially, Liles was selected to play for Team USA in the 2000 World Junior Championships in Umeå, Sweden, but suffered an injured shoulder in the last minute of the last exhibition game to rule him out of the tournament. During the 2004–05 NHL lockout, Liles made his international debut when he was recalled prior to his European stint with the DEL's Islerhohn Roosters as an injury replacement for Hal Gill for the 2004 World Cup. After scoring in his first exhibition game against Russia, Liles played in two games during the World Cup.