| # | Swimmer | Team | Seed | Time | Diff |
| 1 |
La Pietra, Rosalia G (10)
|
FGAZFL |
1:36.32 |
1:31.46 |
-4.86 |
| 2 |
Mendoza, Sara M (10)
|
FGYSF |
1:41.75 |
1:34.94 |
-6.81 |
| 3 |
Evans, Shelby O (8)
|
FGSOFL |
1:38.46 |
1:35.69 |
-2.77 |
| 4 |
Lugo, Sofia A (10)
|
FGSOFL |
1:42.86 |
1:37.05 |
-5.81 |
| 5 |
Paniagua, Salome (10)
|
FGYSF |
1:41.01 |
1:38.18 |
-2.83 |
| 6 |
Chaison, Molly A (9)
|
FGMWA |
1:37.76 |
1:38.19 |
0.43 |
| 7 |
Gendarmi, Alessandra L (10)
|
FGSOFL |
1:38.02 |
1:38.32 |
0.30 |
| 8 |
Pedraja, Isabella F (10)
|
FGCANE |
1:41.33 |
1:41.13 |
-0.20 |
| 9 |
Larralde, Emma (9)
|
FGCANE |
1:43.18 |
1:42.20 |
-0.98 |
| 10 |
Martin, Gianna S (8)
|
FGSOFL |
1:41.25 |
1:44.19 |
2.94 |
| 11 |
Salazar, Alicia A (8)
|
FGMACM |
1:44.67 |
1:45.72 |
1.05 |
| 12 |
Gomez, Sofia (9)
|
FGSOFL |
1:44.20 |
1:45.89 |
1.69 |
|
Egea-Guimaaes, Carolina (10)
|
FGGRSC |
1:38.63 |
DQ |
- |