Heat 3
lundi 24 juillet 2017, 10h56 GMT – 10h56 GMT
| Nom | Équipe | Temps | |
|---|---|---|---|
| 1 |  Katie Ledecky | United States | 15′ 47.54″ |
| 2 |  Mireia Belmonte | Spain | + 17.83″ |
| 3 |  Kristel Kobrich | Chile | + 29.74″ |
| 4 | Julia Hassler | Liechtenstein | + 31.62″ |
| 5 | Jimena Pérez | Spain | + 33.91″ |
| 6 | Tamila Holub | Portugal | + 36.51″ |
| 7 | Emma Robinson | New Zealand | + 38.24″ |
| 8 |  Tjaša Oder | Slovenia | + 47.32″ |
| 9 | Martina Elhenická | Czech Republic | + 1′ 17.09″ |
| 10 | Souad Cherouati | Algeria | + 1′ 37.46″ |