| Final | Team | time | L | Rk. | | 1. Daynara Paula | BRA | 26.77s | 4 | 1. | | 2. Daniele Jesus | BRA | 27.35s | 5 | 2. | | 3. Jeserik Andreina Pinto | VEN | 27.58s | 3 | 3. | | 4. Loren Yamile Bahamonde Cabello | ECU | 28.05s | 2 | 5. | | 5. Maria Clara Quintero Sosa | COL | 28.46s | 6 | 4. | | 6. Ayelen Becker | ARG | 28.73s | 1 | 7. | | 7. Manuela Morano | ARG | 28.92s | 7 | 6. | | 8. Elimar Barrios | VEN | 28.99s | 8 | 7. |
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| Heat 1 | Team | time | L | Rk. | | 1. Loren Yamile Bahamonde Cabello | ECU | 28.77s | 4 | 5. | | 2. Manuela Morano | ARG | 28.88s | 5 | 6. | | 3. Ayelen Becker | ARG | 28.98s | 3 | 7. | | 4. Ximena Elisabeth Andrada Espinol | ECU | 29.85s | 6 | 9. | | 5. Nilshaira Isenia | AHO | 30.19s | 2 | 12. |
| Heat 2 | Team | time | L | Rk. | | 1. Daniele Jesus | BRA | 27.91s | 4 | 2. | | 2. Maria Clara Quintero Sosa | COL | 28.62s | 5 | 4. | | 3. Elimar Barrios | VEN | 28.98s | 3 | 7. | | 4. Raissa Andrea Guerra | URU | 29.94s | 6 | 10. | | 5. Maria Graciela Wong Rosales | PER | 30.18s | 2 | 11. | | 6. Josefina Bailac Meneses | CHI | 31.48s | 7 | 15. |
| Heat 3 | Team | time | L | Rk. | | 1. Daynara Paula | BRA | 27.21s | 4 | 1. | | 2. Jeserik Andreina Pinto | VEN | 28.17s | 6 | 3. | | 3. Karen Milenka Torrez Guzman | BOL | 30.28s | 2 | 13. | | 4. Massie Milagros Carrillo Yong | PER | 31.16s | 7 | 14. | | -. Carolina Colorado Henao | COL | DQ | 5 | | | -. Eliana Barrios | VEN | DNS | 3 | |
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