| POS | Rank | Heat | BIB | ATHLETE | COUNTRY | RESULTS | 
|---|---|---|---|---|---|---|
| 1 | 1 | 2 | 454 | Alex Ngeno KIPNGETICH |  KEN | 1:46.81 Q | 
| 2 | 2 | 2 | 153 | Eliott CRESTAN |  BEL | 1:46.84 Q NU20R | 
| 3 | 3 | 2 | 393 | Simone BARONTINI |  ITA | 1:47.35 Q PB | 
| 4 | 4 | 2 | 102 | Oussama Cherrad |  ALG | 1:47.36 q PB | 
| 5 | 1 | 1 | 457 | Solomon Lekuta |  KEN | 1:47.56 Q | 
| 6 | 5 | 2 | 307 | Markhim Lonsdale |  GBR | 1:47.73 q SB | 
| 7 | 2 | 1 | 262 | Adisu GIRMA |  ETH | 1:47.88 Q | 
| 8 | 3 | 1 | 293 | Alex Botterill |  GBR | 1:47.97 Q | 
| 9 | 4 | 1 | 646 | Josh HOEY |  USA | 1:48.07 PB | 
| 10 | 6 | 2 | 204 | Marino BLOUDEK |  CRO | 1:48.20 SB | 
| 11 | 5 | 1 | 205 | Sven Cepuš |  CRO | 1:48.38 PB | 
| 12 | 6 | 1 | 607 | Mehmet ÇELİK |  TUR | 1:48.53 PB | 
| 13 | 7 | 1 | 203 | Juan Diego Castro |  CRC | 1:49.13 NU20R | 
| 14 | 8 | 1 | 155 | Pieter SISK |  BEL | 1:49.82 | 
| 15 | 7 | 2 | 656 | Rey Rivera |  USA | 1:50.48 | 
| 16 | 8 | 2 | 534 | Marcelo Pereira |  POR | 1:57.88 |