Heats
lundi 22 juillet 2019, 04h23 GMT – 04h23 GMT
| Nom | Équipe | Temps | |
|---|---|---|---|
| 1 |  Katie Ledecky | United States | 15′ 48.9″ |
| 2 |  Simona Quadarella | Italy | + 2.69″ |
| 3 |  Sarah Kohler | Germany | + 5.18″ |
| 4 |  Ajna Késely | Hungary | + 5.58″ |
| 5 | Ashley Twichell | United States | + 7.32″ |
| 6 |  Kiah Melverton | Australia | + 11.02″ |
| 7 |  Jianjiahe Wang | China | + 11.27″ |
| 8 | Maddy Gough | Australia | + 13.85″ |
| 9 |  Mireia Belmonte | Spain | + 19.47″ |
| 10 |  Tjaša Oder | Slovenia | + 21.24″ |
| 11 |  Giulia Gabbrielleschi | Italy | + 27.11″ |
| 12 | Kristel Kobrich | Chile | + 27.36″ |
| 13 | Jimena Pérez | Spain | + 30.71″ |
| 14 | Julia Hassler | Liechtenstein | + 36.69″ |
| 15 | Anastasia Kirpichnikova | Russia | + 38.69″ |
| 16 | Tamila Holub | Portugal | + 40.67″ |
| 17 | Emma O'Croinin | Canada | + 41.56″ |
| 18 | Diana Durães | Portugal | + 41.77″ |
| 19 | Marlene Kahler | Austria | + 43.1″ |
| 20 |  Viviane Jungblut | Brazil | + 47.35″ |
| 21 | Ching Hwee Gan | Singapore | + 55.75″ |
| 22 | Da-Kyung Han | Korea | + 1′ 0.23″ |
| 23 | Ke Zhang | China | + 1′ 1.65″ |
| 24 | Arianna Valloni | San Marino | + 1′ 8.08″ |
| 25 | Tinky Ho | Hong Kong, China | + 1′ 10.23″ |
| 26 | Matea Sumajstorcic | Croatia | + 1′ 13.11″ |
| 27 | Julia Arino | Argentina | + 1′ 29.09″ |
| 28 | Souad Cherouati | Algeria | + 1′ 36.22″ |
| 29 | Eva Petrovska | North Macedonia | + 1′ 46.28″ |