| RK | LN | Name | Time | Gap | FINA | Q? |
|---|---|---|---|---|---|---|
| 1 | 3 | Karzazi Lilya (2015)Budapesti Honvéd SE | 00:43.40 | - | 178 | |
| 2 | 7 | Nguyen Huynh Tue Tam (2015)BVSC-Zugló | 00:46.62 | 00:03.22 | 143 | |
| 3 | 4 | Nagy Zselyke (2016)Monori Sport Egyes. | 00:46.80 | 00:03.40 | 142 | |
| 4 | 6 | Stiaszni Zoé Pálma (2015)BVSC-Zugló | 00:46.96 | 00:03.56 | 140 | |
| 5 | 1 | Ollé Borbála (2016)Darnyi Tamás SC | 00:49.05 | 00:05.65 | 123 | |
| 6 | 5 | Kopasz Léna (2015)BVSC-Zugló | 00:50.17 | 00:06.77 | 115 | |
| 7 | 8 | Németh Lujza Júlia (2015)BVSC-Zugló | 00:52.81 | 00:09.41 | 98 | |
| 8 | 2 | Szomolánkai Mira (2017)Darnyi Tamás SC | 00:53.36 | 00:09.96 | 95 |