Heat 4
mardi 11 décembre 2018, 02h50 GMT – 02h50 GMT
| Nom | Équipe | Temps | |
|---|---|---|---|
| 1 |  Mallory Comerford | United States | 1′ 52.52″ |
| 2 |  Ariarne Titmus | Australia | + 0.14″ |
| 3 |  Jianjiahe Wang | China | + 2.11″ |
| 4 |  Annika Bruhn | Germany | + 2.79″ |
| 5 | Anastasia Guzhenkova | Russia | + 2.92″ |
| 6 | Leah Smith | United States | + 3″ |
| 7 | Carla Buchanan | Australia | + 3.12″ |
| 8 | Elisbet Gámez | Cuba | + 5.85″ |
| 9 | Tinky Ho | Hong Kong, China | + 7.97″ |
| 10 | Ieva Maluka | Latvia | + 8.49″ |