| # | Swimmer | Team | Seed | Time | Diff |
| 1 |
Jaffe, Erica J (12)
|
SNUNAT |
17:52.39 |
17:40.92 |
-11.47 |
| 2 |
Zhang, Kelsey (12)
|
PCPASA |
17:45.55 |
18:01.08 |
15.53 |
| 3 |
Richter, Kathleen C (12)
|
UTWFFM |
20:20.38 |
18:01.60 |
-138.78 |
| 4 |
Colvin, Camryn E (12)
|
AZRIO |
19:16.90 |
18:29.38 |
-47.52 |
| 5 |
Dumitrascu, Nicole E (12)
|
SRBY |
18:44.26 |
18:37.48 |
-6.78 |
| 6 |
Biello, Adelia S (12)
|
SNDART |
20:33.71 |
18:37.85 |
-115.86 |
| 7 |
Jones, Ezmee (12)
|
AZNEP |
19:05.24 |
18:45.64 |
-19.60 |
| 8 |
Therrien, Emerson P (12)
|
AZRIO |
19:01.02 |
18:53.57 |
-7.45 |
| 9 |
Zhang, Lari S (12)
|
SRBY |
19:39.76 |
19:00.04 |
-39.72 |
| 10 |
Brent, Jamie (11)
|
AZRIO |
19:06.52 |
19:16.83 |
10.31 |
| 11 |
Clark, Kayla E (12)
|
AZYWSF |
20:36.53 |
19:29.27 |
-67.26 |
| 12 |
Supreme, Safiyah O (12)
|
AZUNRI |
20:34.19 |
19:40.54 |
-53.65 |
| 13 |
Chan, Charlotte M (12)
|
PCBAC |
21:14.48 |
19:44.92 |
-89.56 |
| 14 |
Perry, Lilykate (11)
|
AZRIO |
20:24.58 |
20:49.12 |
24.54 |
| 15 |
Moon, Megan E (12)
|
AZRIO |
21:13.43 |
20:50.12 |
-23.31 |
| 16 |
Peterson, Adia E (11)
|
AZRIO |
21:54.91 |
20:52.29 |
-62.62 |
| 17 |
Hendricks, Molly B (12)
|
AZCA |
21:29.40 |
21:06.49 |
-22.91 |
| 18 |
Chiang, Jeannine S (12)
|
PCBAC |
22:24.99 |
21:18.22 |
-66.77 |
| 19 |
LeRoux, Marguerite C (12)
|
AZNEP |
21:35.57 |
21:22.98 |
-12.59 |