| # | Swimmer | Team | Seed | Time | Diff |
| 1 |
Zhang, Suri (13)
|
MRFREE |
1:10.22 |
1:06.42 |
-3.80 |
| 1 |
Sherpa, Sharon D (13)
|
MRLGAC |
1:12.63 |
1:13.08 |
0.45 |
| 2 |
Dojillo, Chloe R (13)
|
MRLGAC |
1:07.58 |
1:07.10 |
-0.48 |
| 2 |
Polauf, Sofia (13)
|
MRLIE |
1:11.67 |
1:13.56 |
1.89 |
| 3 |
De Mendonca, Sophia A (13)
|
MRMCBY |
1:08.63 |
1:08.00 |
-0.63 |
| 3 |
Longhitano, Leana R (13)
|
MRLGAC |
1:11.42 |
1:14.10 |
2.68 |
| 4 |
Hunter, Madeleine J (13)
|
MRLIE |
1:09.31 |
1:08.82 |
-0.49 |
| 5 |
Fong-Causone, Sofia A (13)
|
MRYFD |
1:09.43 |
1:08.88 |
-0.55 |
| 6 |
Roudnitsky, Julia (13)
|
MRFREE |
1:07.57 |
1:09.40 |
1.83 |
| 7 |
Spodek, Sienna L (13)
|
MRYFD |
1:10.02 |
1:09.57 |
-0.45 |
| 8 |
Lee, Lucy S (13)
|
MRYFD |
1:08.73 |
1:10.17 |
1.44 |
|
Han, Marianne H (13)
|
MRFLY |
1:11.48 |
DQ |
- |