Heat 3
lundi 22 juillet 2019, 04h23 GMT – 04h23 GMT
| Nom | Équipe | Temps | |
|---|---|---|---|
| 1 |  Katie Ledecky | United States | 15′ 48.9″ |
| 2 |  Sarah Kohler | Germany | + 5.18″ |
| 3 |  Jianjiahe Wang | China | + 11.27″ |
| 4 |  Maddy Gough | Australia | + 13.85″ |
| 5 |  Mireia Belmonte | Spain | + 19.47″ |
| 6 |  Tjaša Oder | Slovenia | + 21.24″ |
| 7 |  Jimena Pérez | Spain | + 30.71″ |
| 8 | Julia Hassler | Liechtenstein | + 36.69″ |
| 9 | Anastasia Kirpichnikova | Russia | + 38.69″ |
| 10 |  Viviane Jungblut | Brazil | + 47.35″ |