| POS | Rank | Heat | BIB | ATHLETE | COUNTRY | RESULTS | 
|---|---|---|---|---|---|---|
| 1 | 1 | 1 | 1591 | Wesley VÁZQUEZ |  PUR | 1:43.96 Q | 
| 2 | 2 | 1 | 1295 | Ferguson Cheruiyot ROTICH |  KEN | 1:44.20 Q | 
| 3 | 3 | 1 | 1919 | Clayton MURPHY |  USA | 1:44.48 q | 
| 4 | 1 | 2 | 1871 | Donavan BRAZIER |  USA | 1:44.87 Q | 
| 5 | 4 | 1 | 647 | Adrián BEN |  ESP | 1:44.97 q PB | 
| 6 | 2 | 2 | 395 | Marco AROP |  CAN | 1:45.07 Q | 
| 7 | 5 | 1 | 828 | Elliot GILES |  GBR | 1:45.15 | 
| 8 | 3 | 2 | 1288 | Emmanuel Kipkurui KORIR |  KEN | 1:45.19 | 
| 9 | 6 | 1 | 1531 | Adam KSZCZOT |  POL | 1:45.22 | 
| 10 | 4 | 2 | 1905 | Brannon KIDDER |  USA | 1:45.62 | 
| 11 | 1 | 3 | 272 | Amel TUKA |  BIH | 1:45.63 Q | 
| 12 | 5 | 2 | 1379 | Mostafa SMAILI |  MAR | 1:45.78 | 
| 13 | 7 | 1 | 1765 | Abdessalem AYOUNI |  TUN | 1:45.80 | 
| 14 | 2 | 3 | 1896 | Bryce HOPPEL |  USA | 1:45.95 Q | 
| 15 | 6 | 2 | 1645 | Tshepo TSHITE |  RSA | 1:46.08 | 
| 16 | 3 | 3 | 651 | Álvaro DE ARRIBA |  ESP | 1:46.09 | 
| 17 | 7 | 2 | 104 | Yassine HETHAT |  ALG | 1:46.15 | 
| 18 | 4 | 3 | 412 | Brandon MCBRIDE |  CAN | 1:46.21 | 
| 19 | 5 | 3 | 845 | Kyle LANGFORD |  GBR | 1:46.41 | 
| 20 | 6 | 3 | 1281 | Alex Ngeno KIPNGETICH |  KEN | 1:46.61 | 
| 21 | 8 | 1 | 1593 | Abubaker Haydar ABDALLA |  QAT | 1:46.87 | 
| 22 | 7 | 3 | 761 | Pierre-Ambroise BOSSE |  FRA | 1:47.60 | 
| 23 | 8 | 2 | 851 | Jamie WEBB |  GBR | 1:48.44 | 
| 3 | 1376 | Oussama NABIL |  MAR | DQ |