| # | Swimmer | Team | Seed | Time | Diff |
| 1 |
Morales, Angelika M (10)
|
FGEA |
49.01 |
47.48 |
-1.53 |
| 2 |
Pedraja, Isabella F (10)
|
FGCANE |
48.23 |
47.81 |
-0.42 |
| 3 |
Truyol, Isabella R (10)
|
FGEA |
50.11 |
48.04 |
-2.07 |
| 4 |
Mendez, Gabriela M (10)
|
FGCANE |
49.93 |
48.51 |
-1.42 |
| 5 |
Baland, Clea M (9)
|
FGCANE |
51.91 |
49.76 |
-2.15 |
| 6 |
Goron, Sasha C (9)
|
FGCANE |
52.38 |
49.80 |
-2.58 |
| 7 |
Carli, Caterina (10)
|
FGMCDA |
1:02.77 |
51.09 |
-11.68 |
| 8 |
Vega-Mendez, Danette (9)
|
FGASC |
52.94 |
51.57 |
-1.37 |
| 9 |
Matovic, Magdalena (9)
|
FGEA |
54.43 |
54.49 |
0.06 |
| 10 |
Janssens, Roxane S (10)
|
FGEA |
53.55 |
54.57 |
1.02 |
| 11 |
Bachmann, Kristen S (9)
|
FGMBS |
58.77 |
54.69 |
-4.08 |
| 12 |
McGuinn, Meghan V (10)
|
FGMCDA |
1:43.25 |
55.05 |
-48.20 |
| 13 |
Estrada, Victoria . (9)
|
FGCANE |
|
55.85 |
- |
| 14 |
David, Antonia (9)
|
FGEA |
1:00.10 |
56.90 |
-3.20 |
| 15 |
Lopez, Isabella M (9)
|
FGCANE |
54.84 |
57.95 |
3.11 |
| 16 |
Diaz, Maya (10)
|
FGASC |
1:09.70 |
59.72 |
-9.98 |
| 17 |
Espenkotter, Stella (9)
|
FGSGST |
1:07.60 |
1:03.38 |
-4.22 |
| 18 |
Wolk, Emily S (9)
|
FGMCDA |
1:09.59 |
1:05.71 |
-3.88 |
| 19 |
Sarypbekova, Ayana E (9)
|
FGNMST |
|
1:10.08 |
- |
| 20 |
Garcia, Natalia (9)
|
FGMCDA |
1:28.19 |
1:25.75 |
-2.44 |
|
Slobodehikova, Angelika (10)
|
FGMSAT |
|
NS |
- |