Semifinal 2
mercredi 12 décembre 2018, 13h07 GMT – 13h07 GMT
| Nom | Équipe | Temps | |
|---|---|---|---|
| 1 |  Ranomi Kromowidjojo | Netherlands | 51.95″ |
| 2 |  Menghui Zhu | China | + 0.09″ |
| 3 |  Michelle Coleman | Sweden | + 0.23″ |
| 4 |  Mallory Comerford | United States | + 0.41″ |
| 5 | Lia Neal | United States | + 0.74″ |
| 6 |  Erin Gallagher | South Africa | + 0.75″ |
| 7 | Tomomi Aoki | Japan | + 1.32″ |
| 8 | Veronika Andrusenko | Russia | + 1.4″ |