| RK | LN | Name | Time | Gap | FINA | Q? |
|---|---|---|---|---|---|---|
| 1 | 2 | Nagy Zsófia Martina (2016)Bálinti Úszó Egyes. | 00:43.27R:0.7 | - | 162 | |
| 2 | 3 | Marjai Zoé (2015)Megathlon SE | 00:46.72 | 00:03.45 | 129 | |
| 3 | 7 | Gerván Adél (2014)HUN TEAM SE | 00:46.77 | 00:03.50 | 128 | |
| 4 | 4 | Hermándi Luca Bíborka (2018)Tatabányai Vizmü SE | 00:46.85 | 00:03.58 | 127 | |
| 5 | 8 | Dabbagh Alia (2026)Budapesti Honvéd SE | 00:47.58 | 00:04.31 | 122 | |
| 6 | 5 | Rózsa Rebeka (2018)Budapesti Honvéd SE | 00:50.34R:0.71 | 00:07.07 | 103 | |
| 7 | 1 | Hőnich Zita (2019)Darnyi Tamás SC | 00:55.48R:0.55 | 00:12.21 | 77 | |
| 8 | 6 | Lugosi Liliána (2019)Darnyi Tamás SC | 00:57.81R:0.6 | 00:14.54 | 68 | |
| 9 | 0 | Márki Anna Sára (2017)Jövő Magyar Sportolói SE | 00:58.23R:0.67 | 00:14.96 | 66 |