Semifinal 1
vendredi 10 août 2018, 19h55 GMT – 19h55 GMT
| Nom | Équipe | Temps | |
|---|---|---|---|
| 1 |  Dina Asher-Smith | Great Britain | 22.33″ |
| 2 |  Ivet Lalova-Collio | Bulgaria | + 0.32″ |
| 3 | Bianca Williams | Great Britain | + 0.5″ |
| 4 | Laura Müller | Germany | + 0.54″ |
| 5 | Martyna Kotwila | Poland | + 1.08″ |
| 6 | Estela García | Spain | + 1.13″ |
| 7 | Lorene Bazolo | Portugal | + 1.47″ |
| 8 | Cornelia Halbheer | Switzerland | + 1.65″ |