| POS | Rank | Heat | BIB | ATHLETE | COUNTRY | RESULTS | 
|---|---|---|---|---|---|---|
| 1 | 1 | 5 | 186 | Mariano GARCÍA |  ESP | 1:45.81 Q | 
| 2 | 2 | 5 | 397 | Isaiah HARRIS |  USA | 1:46.12 Q SB | 
| 3 | 1 | 2 | 400 | Bryce HOPPEL |  USA | 1:46.15 Q | 
| 4 | 3 | 5 | 208 | Benjamin ROBERT |  FRA | 1:46.16 q | 
| 5 | 1 | 4 | 184 | Mohamed ATTAOUI |  ESP | 1:46.20 Q | 
| 6 | 2 | 4 | 368 | Andreas KRAMER |  SWE | 1:46.21 Q SB | 
| 7 | 2 | 2 | 280 | Abdelati EL GUESSE |  MAR | 1:46.29 Q | 
| 8 | 3 | 4 | 120 | Tibo DE SMET |  BEL | 1:46.34 q SB | 
| 9 | 1 | 1 | 103 | Mohamed Ali GOUANED |  ALG | 1:46.49 Q | 
| 10 | 4 | 5 | 299 | Ryan CLARKE |  NED | 1:46.69 | 
| 11 | 2 | 1 | 129 | Tshepiso MASALELA |  BOT | 1:46.76 Q | 
| 12 | 1 | 3 | 119 | Eliott CRESTAN |  BEL | 1:46.79 Q | 
| 13 | 3 | 1 | 265 | Collins KIPRUTO |  KEN | 1:46.89 SB | 
| 14 | 3 | 2 | 264 | Noah KIBET |  KEN | 1:46.90 | 
| 15 | 2 | 3 | 245 | Catalin TECUCEANU |  ITA | 1:47.07 Q | 
| 16 | 4 | 2 | 242 | Francesco PERNICI |  ITA | 1:47.38 PB | 
| 17 | 4 | 1 | 318 | James PRESTON |  NZL | 1:47.59 NR | 
| 18 | 4 | 4 | 165 | Jakub DUDYCHA |  CZE | 1:47.81 | 
| 19 | 3 | 3 | 231 | Balázs VINDICS |  HUN | 1:47.83 SB | 
| 20 | 5 | 1 | 326 | Mateusz BORKOWSKI |  POL | 1:48.07 | 
| 21 | 5 | 2 | 307 | Edose IBADIN |  NGR | 1:48.21 SB | 
| 22 | 5 | 5 | 173 | Filip ŠNEJDR |  CZE | 1:48.30 | 
| 23 | 4 | 3 | 345 | John RIVERA |  PUR | 1:48.44 | 
| 24 | 5 | 3 | 321 | Husain Mohsin AL-FARSI |  OMA | 1:48.47 NR | 
| 25 | 5 | 4 | 420 | Efrem MEKONNEN |  ETH | 1:49.71 | 
| 26 | 6 | 3 | 135 | Eduardo RIBEIRO |  BRA | 1:49.74 PB | 
| 27 | 6 | 4 | 159 | Marino BLOUDEK |  CRO | 1:49.97 |