| RK | LN | Name | Time | Gap | FINA | Q? |
|---|---|---|---|---|---|---|
| 1 | 5 | Wittmann Zsófi (2015)DSI | 00:46.53R:0.72 | - | 246 | |
| 2 | 3 | Barát Flóra (2017)PVM SK | 00:48.80R:0.55 | 00:02.27 | 213 | |
| 3 | 6 | Szántó Kitti (2017)Keszthelyi Kiscápák | 00:51.13 | 00:04.60 | 185 | |
| 4 | 0 | Jakab Natasa (2017)DSI | 00:51.41R:0.68 | 00:04.88 | 182 | |
| 5 | 9 | Kocsis Borka (2014)Vitál Sport | 00:51.42 | 00:04.89 | 182 | |
| 6 | 1 | Kertész Réka (2013)Hullám 91 | 00:51.50 | 00:04.97 | 181 | |
| 7 | 7 | Nagy Réka Jázmin (2016)NUTE | 00:51.66R:0.78 | 00:05.13 | 179 | |
| 8 | 8 | Besenczi Liána (2017)Zalaco ZÚK | 00:53.14 | 00:06.61 | 165 | |
| - | 4 | Pintér Emma (2015)PUSE | DNS | |||
| - | 2 | Juhász Maja (2017)KASI | DNS |