Heats
samedi 15 décembre 2018, 02h36 GMT – 02h36 GMT
| Nom | Équipe | Temps | |
|---|---|---|---|
| 1 |  Katinka Hosszú | Hungary | 2′ 5.42″ |
| 2 |  Shiwen Ye | China | + 1.03″ |
| 3 | Kathleen Baker | United States | + 1.15″ |
| 4 |  Ilaria Cusinato | Italy | + 1.69″ |
| 5 | Melanie Margalis | United States | + 1.97″ |
| 6 |  Abbey Harkin | Australia | + 2.03″ |
| 7 | Sakiko Shimizu | Japan | + 2.33″ |
| 8 | Emily Seebohm | Australia | + 2.36″ |
| 9 |  Rika Omoto | Japan | + 2.52″ |
| 10 |  Fantine Lesaffre | France | + 2.85″ |
| 11 | Min Zhou | China | + 3.75″ |
| 12 | Catalina Corró | Spain | + 4.4″ |
| 13 |  Kristýna Horská | Czech Republic | + 4.94″ |
| 14 | Barbora Závadová | Czech Republic | + 5.36″ |
| 15 |  Marie Pietruschka | Germany | + 5.55″ |
| 16 | Irina Krivonogova | Russia | + 6.09″ |
| 17 | Florencia Perotti | Argentina | + 6.41″ |
| 18 | Anastasiya Sorokina | Russia | + 7.37″ |
| 19 | Victoria Kaminskaya | Portugal | + 7.4″ |
| 20 | McKenna DeBever | Peru | + 8.04″ |
| 21 | Aela Janvier | Canada | + 8.38″ |
| 22 |  Rebecca Meder | South Africa | + 9.26″ |
| 23 | Claudia Hufnagl | Austria | + 9.5″ |
| 24 | Natalie Kan | Hong Kong, China | + 9.68″ |
| 25 | Viktoria Günes | Turkey | + 9.69″ |
| 26 | Georgina Mccarthy | New Zealand | + 9.98″ |
| 27 |  Lisa Mamie | Switzerland | + 10.37″ |
| 28 | Diana Durães | Portugal | + 10.84″ |
| 29 | Sabina Kupcová | Slovakia | + 10.96″ |
| 30 | Margaret Markvardt | Estonia | + 11.49″ |
| 31 | Wan-Chen Wang | Chinese Taipei | + 14.9″ |
| 32 | Mya Azzopardi | Malta | + 16.67″ |
| 33 | Elisa Funes | El Salvador | + 17.71″ |
| 34 | Sara Pastrana | Honduras | + 19.64″ |
| 35 | Gabriella Doueihy | Lebanon | + 22.44″ |
| 36 | Inana Suleiman | Syria | + 22.79″ |
| 37 | Kaya Forson | Ghana | + 26.04″ |
| 38 | Thimali Bandara | Sri Lanka | + 27.86″ |
| Marina García | Spain | DNF |