Heats
vendredi 26 juillet 2019, 04h54 GMT – 04h54 GMT
| Nom | Équipe | Temps | |
|---|---|---|---|
| 1 |  Leah Smith | United States | 8′ 17.23″ |
| 2 |  Katie Ledecky | United States | + 0.19″ |
| 3 |  Ariarne Titmus | Australia | + 2.2″ |
| 4 |  Simona Quadarella | Italy | + 3.63″ |
| 5 |  Jianjiahe Wang | China | + 3.68″ |
| 6 |  Sarah Kohler | Germany | + 5.72″ |
| 7 |  Mireia Belmonte | Spain | + 10.99″ |
| 8 | Kiah Melverton | Australia | + 12.47″ |
| 9 |  Tjaša Oder | Slovenia | + 13.74″ |
| 10 |  Ajna Késely | Hungary | + 15.11″ |
| 11 | Jimena Pérez | Spain | + 15.15″ |
| 12 | Anna Egorova | Russia | + 17.5″ |
| 13 | Julia Hassler | Liechtenstein | + 17.68″ |
| 14 | Giulia Gabbrielleschi | Italy | + 17.8″ |
| 15 | Bingjie Li | China | + 20.18″ |
| 16 | Anastasia Kirpichnikova | Russia | + 20.67″ |
| 17 | Tamila Holub | Portugal | + 21.54″ |
| 18 | Mackenzie Padington | Canada | + 22.35″ |
| 19 |  Viviane Jungblut | Brazil | + 25.29″ |
| 20 | Diana Durães | Portugal | + 27.14″ |
| 21 |  Eve Thomas | New Zealand | + 27.42″ |
| 22 | Marlene Kahler | Austria | + 27.9″ |
| 23 | Ching Hwee Gan | Singapore | + 30.65″ |
| 24 |  Dune Coetzee | South Africa | + 30.74″ |
| 25 | Matea Sumajstorcic | Croatia | + 31.38″ |
| 26 | Da-Kyung Han | Korea | + 32.67″ |
| 27 | Boglárka Kapás | Hungary | + 32.9″ |
| 28 | Hanna Eriksson | Sweden | + 34.91″ |
| 29 | Arianna Valloni | San Marino | + 35.62″ |
| 30 | Tinky Ho | Hong Kong, China | + 36.14″ |
| 31 | Laura Lahtinen | Finland | + 37.71″ |
| 32 | Nicole Oliva | Philippines | + 38.27″ |
| 33 | Ammiga Himathongkom | Thailand | + 40.6″ |
| 34 | Julia Arino | Argentina | + 46.79″ |
| 35 | Souad Cherouati | Algeria | + 55.07″ |
| 36 | Eva Petrovska | North Macedonia | + 55.48″ |
| 37 | Gabriella Doueihy | Lebanon | + 1′ 2.55″ |
| 38 | Talita Te Flan | Ivory Coast | + 1′ 3.96″ |
| 39 | Raya Embury-Brown | Cayman Islands | + 1′ 5.46″ |
| 40 | Diana Zlobina | Kazakhstan | + 1′ 13.82″ |
| Kristel Kobrich | Chile | DNF | |
| Joanna Evans | Bahamas | DNF |