Women's 400m Freestyle - Heat 4
dimanche 7 août 2016, 17h46 GMT – 22h46 GMT
| Nom | Temps | |
|---|---|---|
| 1 |  Katie Ledecky | 3′ 58.71″ |
| 2 |  Coralie Balmy | + 4.69″ |
| 3 |  Boglárka Kapás | + 5.4″ |
| 4 |  Tasmin Cook | + 5.65″ |
| 5 | Lauren Boyle | + 9.19″ |
| 6 |  Anja Klinar | + 10.36″ |
| 7 |  Sharon van Rouwendaal | + 12.73″ |
| 8 | Diletta Carli | + 18.439″ |