Heat 4
dimanche 21 juillet 2019, 03h16 GMT – 03h16 GMT
| Nom | Équipe | Temps | |
|---|---|---|---|
| 1 |  Gabriele Detti | Italy | 3′ 45.49″ |
| 2 |  Mack Horton | Australia | + 0.02″ |
| 3 |  Zane Grothe | United States | + 0.34″ |
| 4 |  Xinjie Ji | China | + 0.85″ |
| 5 | Martin Malyutin | Russia | + 1.94″ |
| 6 |  Anton Ipsen | Denmark | + 3.01″ |
| 7 | Felix Auböck | Austria | + 3.29″ |
| 8 |  Luiz Altamir Melo | Brazil | + 3.38″ |
| 9 | Marwan El Kamash | Egypt | + 7.02″ |
| 10 | Grant Shoults | United States | + 7.47″ |