| # | Swimmer | Team | Seed | Time | Diff |
| 1 |
Trinidad, Mianny (17)
|
MRRED |
35.53 |
36.31 |
0.78 |
| 2 |
Wright, Ellen J (16)
|
MRRED |
37.30 |
36.69 |
-0.61 |
| 3 |
McKinney, Emilia W (15)
|
MRCIY |
40.79 |
38.50 |
-2.29 |
| 4 |
Lin, Wenxi (16)
|
MRCIY |
37.58 |
39.22 |
1.64 |
| 5 |
Soulantzos, Josephine M (15)
|
MRFLY |
|
39.48 |
- |
| 6 |
Minchala, Lesly Y (18)
|
MRFLY |
40.63 |
40.53 |
-0.10 |
| 7 |
Heerey, Karolina A (15)
|
MRCIY |
|
41.39 |
- |
| 8 |
Sandoval, Joselyn (15)
|
MRRED |
|
41.75 |
- |
| 9 |
Ng, Tiffany (17)
|
MRCIY |
40.73 |
43.40 |
2.67 |
| 10 |
Zhong, Runjia (15)
|
MRFLY |
|
44.17 |
- |
| 11 |
Rojas, Denisse (16)
|
MRFLY |
|
46.69 |
- |
| 12 |
Arcentales, Daffnia J (16)
|
MRFLY |
|
1:01.17 |
- |