Heats
vendredi 14 décembre 2018, 03h13 GMT – 03h13 GMT
| Nom | Équipe | Temps | |
|---|---|---|---|
| 1 |  Ariarne Titmus | Australia | 3′ 58.58″ |
| 2 |  Leah Smith | United States | + 1.88″ |
| 3 |  Jianjiahe Wang | China | + 2.15″ |
| 4 | Bingjie Li | China | + 3.24″ |
| 5 | Anna Egorova | Russia | + 3.73″ |
| 6 |  Sarah Kohler | Germany | + 4.21″ |
| 7 | Erica Musso | Italy | + 4.79″ |
| 8 | Valeria Salamatina | Russia | + 5.93″ |
| 9 |  Simona Quadarella | Italy | + 6.36″ |
| 10 | Carla Buchanan | Australia | + 6.42″ |
| 11 | Diana Durães | Portugal | + 7.07″ |
| 12 |  Haley Anderson | United States | + 7.31″ |
| 13 | Katja Fain | Slovenia | + 7.47″ |
| 14 |  Chihiro Igarashi | Japan | + 7.63″ |
| 15 | Mayuko Gotou | Japan | + 8.23″ |
| 16 | Marlene Kahler | Austria | + 8.37″ |
| 17 | Reva Foos | Germany | + 10.97″ |
| 18 |  Beril Böcekler | Turkey | + 11.32″ |
| 19 | Elisbet Gámez | Cuba | + 11.36″ |
| 20 | Hanna Eriksson | Sweden | + 12.12″ |
| 21 | Rachel Tseng | Singapore | + 12.53″ |
| 22 | Catalina Corró | Spain | + 12.82″ |
| 23 |  Hayley McIntosh | New Zealand | + 13.92″ |
| 24 | Tinky Ho | Hong Kong, China | + 15.11″ |
| 25 | Sabina Kupcová | Slovakia | + 16.2″ |
| 26 | Jessica Cattaneo | Peru | + 17.03″ |
| 27 | Szu-An Chen | Chinese Taipei | + 17.91″ |
| 28 | Kristina Miletic | Croatia | + 19.35″ |
| 29 | Rosalee Santa Ana | Philippines | + 19.45″ |
| 30 | Delfina Dini | Argentina | + 19.62″ |
| 31 | Souad Cherouati | Algeria | + 21.54″ |
| 32 | Gabriella Doueihy | Lebanon | + 27.98″ |
| 33 | Michelle Ramírez | Honduras | + 29.65″ |
| 34 | Nádia Tudó | Andorra | + 34.27″ |
| 35 | Daila Ismatul | Guatemala | + 36.12″ |
| 36 | Natalia Kuipers | Virgin Islands | + 36.53″ |
| 37 | Lorna Doorman | Zimbabwe | + 41″ |
| 38 | Tinatin Kevlishvili | Georgia | + 41.86″ |
| 39 | Tiana Rabarijaona | Madagascar | + 47.5″ |
| 40 | Sonja Kapedani | Albania | + 57.34″ |
| 41 | Osisang Chilton | Palau | + 57.66″ |
 Boglárka Kapás | Hungary | DNS | |
| Talita Te Flan | Ivory Coast | DNS |