Final
mercredi 12 décembre 2018, 13h31 GMT – 13h31 GMT
| Nom | Équipe | Temps | |
|---|---|---|---|
| 1 |  Olivia Smoliga | United States | 56.19″ |
| 2 |  Katinka Hosszú | Hungary | + 0.07″ |
| 3 |  Georgia Davies | Great Britain | + 0.55″ |
| 3 | Minna Atherton | Australia | + 0.55″ |
| 5 | Kathleen Baker | United States | + 0.7″ |
| 6 |  Emily Seebohm | Australia | + 0.79″ |
| 7 |  Simona Kubová | Czech Republic | + 0.84″ |
| 8 | Emi Moronuki | Japan | + 0.99″ |