Heat 5
dimanche 21 juillet 2019, 04h22 GMT – 04h22 GMT
| Nom | Équipe | Temps | |
|---|---|---|---|
| 1 |  Katie Ledecky | United States | 4′ 1.84″ |
| 2 |  Leah Smith | United States | + 2.69″ |
| 3 |  Boglárka Kapás | Hungary | + 5.21″ |
| 4 | Anna Egorova | Russia | + 5.26″ |
| 5 |  Bingjie Li | China | + 6.04″ |
| 6 | Holly Hibbott | Great Britain | + 6.08″ |
| 7 | Joanna Evans | Bahamas | + 9.22″ |
| 8 |  Erika Fairweather | New Zealand | + 10.46″ |
| 9 | Valentine Dumont | Belgium | + 11.08″ |
| 10 |  Chihiro Igarashi | Japan | + 11.97″ |