Heat 4
vendredi 28 juillet 2017, 11h17 GMT – 11h17 GMT
| Nom | Équipe | Temps | |
|---|---|---|---|
| 1 |  Katie Ledecky | United States | 8′ 20.24″ |
| 2 |  Bingjie Li | China | + 2.68″ |
| 3 |  Mireia Belmonte | Spain | + 4.74″ |
| 4 |  Yuhan Zhang | China | + 9.28″ |
| 5 |  Celine Rieder | Germany | + 13.92″ |
| 6 |  Tjaša Oder | Slovenia | + 18.6″ |
| 7 | Mackenzie Padington | Canada | + 20.44″ |
| 8 | Jimena Pérez | Spain | + 21.17″ |
| 9 | Gaja Natlacen | Slovenia | + 21.25″ |
| 10 | Olivia Anderson | Canada | + 23.69″ |