| # | Swimmer | Team | Seed | Time | Diff |
| 1 |
Zettle, Ashley E (17)
|
NTLAC |
17:22.62 |
17:35.46 |
12.84 |
| 2 |
Morgan, Alexis N (16)
|
NTTFA |
18:08.68 |
17:51.49 |
-17.19 |
| 3 |
Henderson, Filippa E (16)
|
NTTFA |
18:15.98 |
18:01.47 |
-14.51 |
| 4 |
Marshall, Adison L (17)
|
NTTFA |
17:52.66 |
18:06.23 |
13.57 |
| 5 |
Bryant, Brooke A (16)
|
NTMAC |
17:51.42 |
18:10.28 |
18.86 |
| 6 |
Scherman, Devin L (16)
|
NTTFA |
18:11.43 |
18:19.87 |
8.44 |
| 7 |
Filimoehala, Trisha T (16)
|
STNTRO |
17:55.41 |
18:21.70 |
26.29 |
| 8 |
Rautaneva, Julia O (15)
|
STNTRO |
18:01.76 |
18:24.20 |
22.44 |
| 9 |
Ballantyne, Emma A (17)
|
NTTFA |
18:03.88 |
18:34.34 |
30.46 |
| 10 |
Cundiff, Emily S (17)
|
NTNTN |
19:14.43 |
18:43.11 |
-31.32 |
| 11 |
Briggs, Keeley S (15)
|
NTTFA |
18:29.32 |
18:43.18 |
13.86 |