Semifinal 1
mercredi 24 juillet 2019, 13h37 GMT – 13h37 GMT
| Nom | Équipe | Temps | |
|---|---|---|---|
| 1 |  Etiene Medeiros | Brazil | 27.69″ |
| 2 |  Georgia Davies | Great Britain | + 0.03″ |
| 3 |  Kaylee McKeown | Australia | + 0.04″ |
| 4 |  Olivia Smoliga | United States | + 0.07″ |
| 5 | Daria Vaskina | Russia | + 0.1″ |
| 6 | Anastasia Fesikova | Russia | + 0.32″ |
| 7 |  Maaike de Waard | Netherlands | + 0.35″ |
| 8 | Alicja Tchórz | Poland | + 0.49″ |