At the 2019 Women's World Cup, Endler was the captain and highest capped player on Chile's roster. She played every minute of Chile's three group stage matches, making thirteen total saves. In the second group match, Chile played number 1 ranked USWNT who had twenty-six attempts on goal and 9 on target throughout the match. Endler made six saves and despite conceding three goals, her performances against the eventual tournament winners earned herself a Player of the Match award and garnered international attention. In the final match of the group stage with Round of 16 qualification on the line, Chile played Thailand who, a week before, suffered the highest ever margin of defeat in a World Cup tournament, men or women. Endler recorded a shutout in that match, helping her team to their first ever win in a World Cup tournament. Chile finished third in Group F and very narrowly exited the tournament by not having enough points nor a high enough goal-difference to be one of the third placed teams that could qualify for the Round of 16. Endler questioned Chile coach José Letelier's decisions in the match against Thailand, saying in a post-match interview that she expected players with more experience to get more game time.