On May 2, 2019, Sonnett was named to the 23-player roster that represented the United States at the 2019 FIFA Women's World Cup.[125] Sonnett earned one cap in the second group stage game against Chile, entering the game at the 82nd minute to replace Abby Dahlkemper.[126] The United States went on to defeat the Netherlands 2–0 in the final, winning back-to-back World Cup titles and the fourth overall World Cup title for the United States women's national team.[127]