| Final 19:25 | | time | gap | L | Y | pts | 100m Bf | 200m Ba | 300m Br | | 1. Leon Marchand |  France | 4:04.28 | ER CR | 4 | 20 | 994 | 55.54s | 1:58.66 | 3:05.94 | | 2. Carson Foster |  United States | 4:06.56 | +2.28s | 5 | 20 | 967 | 55.42s | 1:58.18 | 3:08.50 | | 3. Chase Kalisz | United States | 4:07.47 | +3.19s | 3 | 28 | 956 | 56.83s | 2:01.34 | 3:09.79 | | 4. Lewis Clareburt |  New Zealand | 4:10.98 | +6.70s | 1 | 22 | 917 | 56.18s | 2:00.97 | 3:13.24 | | 5. Brendon Peter Smith |  Australia | 4:11.36 | +7.08s | 8 | 21 | 912 | 56.41s | 2:00.30 | 3:14.44 | | 6. Daiya Seto |  Japan | 4:11.93 | +7.65s | 6 | 28 | 906 | 56.30s | 2:01.57 | 3:12.42 | | 7. Tomoru Honda | Japan | 4:12.20 | +7.92s | 7 | 20 | 903 | 55.21s | 2:01.26 | 3:13.96 | | 8. Balazs Hollo |  Hungary | 4:15.17 | +10.89s | 2 | 23 | 872 | 56.43s | 2:03.22 | 3:15.90 |
| World Record: Michael Phelps, United States 4:03.84 Beijing, China 10th August 2008 | | Championship Record: Chase Kalisz, United States 4:05.90 Budapest, Hungary 30th July 2017 |
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Heats - Saturday, 18th June 11:54 | | Best 8 times advanced to Final. |
| Heat 4 11:12 | | time | gap | L | Y | pts | Rk | 100m Bf | 200m Ba | 300m Br | | 1. Daiya Seto | Japan | 4:10.51 | +1.42s | 4 | 28 | 922 | 4. | 55.87s | 2:00.89 | 3:11.16 | | 2. Tomoru Honda | Japan | 4:12.24 | +3.15s | 2 | 20 | 903 | 6. | 55.35s | 2:01.60 | 3:13.79 | | 3. Lewis Clareburt | New Zealand | 4:12.39 | +3.30s | 3 | 22 | 901 | 7. | 56.63s | 2:01.10 | 3:13.46 | | 4. Brendon Peter Smith | Australia | 4:12.50 | +3.41s | 5 | 21 | 900 | 8. | 56.37s | 2:00.94 | 3:14.40 | | 5. Alberto Razzetti |  Italy | 4:13.72 | +4.63s | 6 | 23 | 887 | 9. | 55.62s | 2:02.85 | 3:14.30 | | 6. Brodie Paul Williams |  Great Britain | 4:13.89 | +4.80s | 7 | 23 | 885 | 10. | 57.02s | 2:01.28 | 3:14.57 | | 7. Hubert Kos | Hungary | 4:15.44 | +6.35s | 1 | 19 | 869 | 12. | 57.07s | 2:00.05 | 3:15.08 | | 8. Collyn Gagne |  Canada | 4:17.85 | +8.76s | 9 | 21 | 845 | 14. | 58.67s | 2:05.79 | 3:18.08 | | 9. Emilien Mattenet | France | 4:19.74 | +10.65s | 0 | 21 | 827 | 17. | 58.54s | 2:05.48 | 3:19.64 | | 10.Zongyu Liu |  China | 4:20.53 | +11.44s | 8 | 19 | 819 | 19. | 58.20s | 2:04.11 | 3:20.70 |
| Heat 3 12:06 | | time | gap | L | Y | pts | Rk | 100m Bf | 200m Ba | 300m Br | | 1. Leon Marchand | France | 4:09.09 | | 3 | 20 | 938 | 1. | 55.53s | 1:58.12 | 3:08.25 | | 2. Carson Foster | United States | 4:09.60 | +0.51s | 5 | 20 | 932 | 2. | 55.40s | 1:58.31 | 3:09.53 | | 3. Chase Kalisz | United States | 4:10.32 | +1.23s | 4 | 28 | 924 | 3. | 56.52s | 2:00.59 | 3:10.66 | | 4. Balazs Hollo | Hungary | 4:10.87 | +1.78s | 7 | 23 | 918 | 5. | 55.83s | 2:01.30 | 3:12.96 | | 5. Se-Bom Lee | Australia | 4:16.40 | +7.31s | 1 | 21 | 860 | 13. | 57.09s | 2:01.58 | 3:14.93 | | 6. Shun Wang | China | 4:17.85 | +8.76s | 6 | 28 | 845 | 14. | 56.89s | 2:01.23 | 3:17.26 | | 7. Stephan Steverink |  Brazil | 4:19.09 | +10.00s | 0 | 18 | 833 | 16. | 58.04s | 2:07.38 | 3:20.29 | | 8. Erick Gordillo |  Guatemala | 4:22.96 | +13.87s | 9 | 22 | 797 | 21. | 58.75s | 2:06.52 | 3:22.43 | | 9. Apostolos Papastamos |  Greece | 4:26.06 | +16.97s | 2 | 21 | 769 | 24. | 58.36s | 2:04.53 | 3:20.11 | | -. Jeremy Desplanches |  Switzerland | DNS | | 8 | 27 | - | -. | | |
| Heat 2 12:00 | | time | gap | L | Y | pts | Rk | 100m Bf | 200m Ba | 300m Br | | 1. Matthew Sates |  South Africa | 4:14.81 | +5.72s | 3 | 18 | 876 | 11. | 56.44s | 2:04.45 | 3:16.04 | | 2. Hector Ruvalcaba |  Mexico | 4:19.99 | +10.90s | 2 | 24 | 824 | 18. | 57.26s | 2:05.22 | 3:20.06 | | 3. Richard Nagy |  Slovakia | 4:20.78 | +11.69s | 5 | 29 | 817 | 20. | 58.27s | 2:07.62 | 3:21.03 | | 4. Ron Polonsky |  Israel | 4:24.05 | +14.96s | 6 | 21 | 787 | 22. | 58.31s | 2:06.12 | 3:20.72 | | 5. Munzer Mark Kabbara |  Lebanon | 4:24.23 | +15.14s | 8 | 19 | 785 | 23. | 1:00.52 | 2:09.39 | 3:24.05 | | 6. Minseop Kim |  South Korea | 4:28.35 | +19.26s | 4 | 18 | 750 | 25. | 56.59s | 2:05.02 | 3:24.83 | | 7. Quang Thuan Nguyen |  Vietnam | 4:29.73 | +20.64s | 7 | 16 | 738 | 26. | 1:00.91 | 2:11.21 | 3:28.48 | | 8. Aflah Prawira |  Indonesia | 4:31.15 | +22.06s | 1 | 24 | 727 | 28. | 1:00.27 | 2:11.73 | 3:28.96 |
| Heat 1 11:54 | | time | gap | L | Y | pts | Rk | 100m Bf | 200m Ba | 300m Br | | 1. Matheo Mateos |  Paraguay | 4:30.20 | +21.11s | 4 | 21 | 734 | 27. | 1:00.27 | 2:10.02 | 3:27.46 | | 2. Omar Abouelela |  Qatar | 4:43.16 | +34.07s | 5 | 17 | 638 | 29. | 1:01.31 | 2:16.82 | 3:37.76 | | 3. Mubal Azzam Ibrahim |  Maldives | 5:14.91 | +1:05.82s | 3 | 21 | 464 | 30. | 1:09.58 | 2:30.18 | 4:03.83 |
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