| # | Swimmer | Team | Seed | Time | Diff |
| 1 |
Acevedo, Saravalentina (11)
|
FGCM |
33.69 |
35.53 |
1.84 |
| 2 |
De La Cruz, Sophia J (12)
|
FGNMST |
36.89 |
36.49 |
-0.40 |
| 3 |
Lowell, Chrislyn M (12)
|
FGFKSC |
40.81 |
39.93 |
-0.88 |
| 4 |
Guerra, Heidi (11)
|
FGFKSC |
44.18 |
40.18 |
-4.00 |
| 5 |
Mogul, Iris I (11)
|
FGCANE |
40.45 |
40.42 |
-0.03 |
| 6 |
Garrocho, Marffa (12)
|
FGMBS |
49.29 |
40.56 |
-8.73 |
| 7 |
Ryzhova, Anna (12)
|
FGMSAT |
|
40.87 |
- |
| 8 |
Mangel, Hailey (11)
|
FGFKSC |
|
40.96 |
- |
| 9 |
Arnedo, Angelina K (11)
|
FGNMST |
42.98 |
42.20 |
-0.78 |
| 10 |
Burnham-Ugalde, Alexandra M (11)
|
FGMBS |
47.35 |
42.56 |
-4.79 |
| 11 |
Kuraeva, Ekaterina (12)
|
FGMSAT |
|
43.27 |
- |
| 12 |
Sorokina, Daria (11)
|
FGMSAT |
|
49.04 |
- |
|
Schlipman, Claudine * (12)
|
FGCANE |
40.94 |
NS |
- |