| Final | Team | time | L | Rk. | 50m | 100m | 150m | | 1. Fernanda Alvarenga | BRA | 2:18.61 | 3 | .. | 33.08s | 1:07.46 | 1:43.36 | | 2. Isabella Arcila Hurtado | COL | 2:19.11 | 5 | .. | 33.17s | 1:08.28 | 1:44.90 | | 3. Georgina Bardach | ARG | 2:19.13 | 4 | .. | 33.72s | 1:09.10 | 1:45.63 | | 4. Erika Layne Stewardt | COL | 2:19.55 | 6 | .. | 32.66s | 1:07.69 | 1:43.56 | | 5. Elimar Barrios | VEN | 2:23.56 | 8 | .. | 33.65s | 1:10.57 | 1:47.20 | | 6. Jeserik Andreina Pinto | VEN | 2:23.76 | 2 | .. | 33.62s | 1:09.51 | 1:47.49 | | 7. Ines Remersaro | URU | 2:23.91 | 1 | .. | 33.53s | 1:09.05 | 1:47.65 | | 8. Carolina Alejandra Aguilar Muro | PER | 2:24.18 | 7 | .. | 33.70s | 1:10.03 | 1:46.99 |
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| Heat 1 | Team | time | L | Rk. | 50m | 100m | 150m | | 1. Jeserik Andreina Pinto | VEN | 2:23.78 | 3 | .. | 33.46s | 1:09.42 | 1:47.16 | | 2. Elimar Barrios | VEN | 2:26.63 | 7 | .. | 34.66s | 1:11.91 | 1:49.43 | | 3. Maria Virginia Franco Baez | PAR | 2:28.88 | 3 | .. | 34.33s | 1:12.01 | 1:50.86 | | 4. Florencia Perotti | ARG | 2:32.53 | 4 | .. | 34.80s | 1:12.47 | 1:53.54 | | 5. Andrea Maria Gregor Ramirez | PAR | 2:35.24 | 2 | ... | 35.68s | 1:13.69 | 1:55.53 | | -. Eliana Barrios | VEN | DNS | 5 | ... | | | |
| Heat 2 | Team | time | L | Rk. | 50m | 100m | 150m | | 1. Georgina Bardach | ARG | 2:20.58 | 4 | .. | 34.96s | 1:10.80 | 1:46.92 | | 2. Isabella Arcila Hurtado | COL | 2:20.77 | 3 | .. | 34.33s | 1:09.67 | 1:45.97 | | 3. Carolina Alejandra Aguilar Muro | PER | 2:24.61 | 6 | .. | 33.40s | 1:09.98 | 1:47.17 | | 4. Nicole Maria Marmol Gilbert | ECU | 2:27.22 | 5 | .. | 35.13s | 1:12.49 | 1:50.25 | | 5. Adriana Jimena Elera Tejada | PER | 2:28.76 | 2 | .. | 34.81s | 1:11.85 | 1:51.15 | | -. Chandel Domaso | SUR | DQ | 7 | ... | | | |
| Heat 3 | Team | time | L | Rk. | 50m | 100m | 150m | | 1. Fernanda Alvarenga | BRA | 2:--.-- | - | | 2. Erika Layne Stewardt | COL | 2:--.-- | - | | 3. Ines Remersaro | URU | 2:--.-- | - |
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