Lavelle represented the United States at multiple youth levels. On November 24, 2015, Lavelle was called up to train with the senior United States women's national soccer team. One of eight players who joined the team's Victory Tour following the 2015 Women's World Cup, she earned her first senior international cap on March 4, 2017, during a match against England at the 2017 SheBelieves Cup. She was named Player of the Match following the team's 1–0 loss.