| # | Swimmer | Team | Seed | Time | Diff |
| 1 |
Glass, Ella A (13)
|
LARRAC |
1:10.22 |
1:11.15 |
0.93 |
| 2 |
Jackson, Emma (13)
|
STDDST |
1:14.43 |
1:11.25 |
-3.18 |
| 3 |
Umana, Katharin (14)
|
STDDST |
1:15.03 |
1:12.71 |
-2.32 |
| 4 |
Jimenez, Alejandra (13)
|
USCSY |
1:14.68 |
1:13.53 |
-1.15 |
| 5 |
Pizarro, Elena M (13)
|
LARRAC |
1:23.48 |
1:20.54 |
-2.94 |
| 6 |
Dart, Ellen A (13)
|
LARRAC |
1:21.53 |
1:20.64 |
-0.89 |
| 7 |
Barber, Noelle (14)
|
STDDST |
1:25.28 |
1:21.64 |
-3.64 |
| 8 |
Smith, Delaney (13)
|
USCSY |
1:22.72 |
1:21.87 |
-0.85 |
| 9 |
Razo, Valentina (13)
|
PCY |
1:26.64 |
1:26.20 |
-0.44 |
| 10 |
Sonnier, Morgan (13)
|
USKRKN |
1:50.14 |
1:34.81 |
-15.33 |
| 11 |
Foshee, Nadia E (14)
|
LARRAC |
1:41.51 |
1:37.94 |
-3.57 |
| 12 |
Duggan, Kendall F (14)
|
LARRAC |
1:40.55 |
1:39.84 |
-0.71 |
|
Romanski, Isabella G (14)
|
LARRAC |
1:49.96 |
DQ |
- |