| Final | Team | time | -)time | L | React. | 200m | 400m | 600m | | 1. Kristel Kobrich | CHI | 8:34.71 | | 4 | | 1. 2:07.50 | 1. 4:16.94 | 1. 6:26.15 | | 2. Ashley Grace Twichell | --- | 8:38.38 | 3.67s | 5 | | 2. 2:07.65 | 2. 4:17.64 | 2. 6:27.75 | | 3. Andreina Pinto | --- | 8:44.55 | 9.84s | 3 | | 3. 2:07.82 | 3. 4:18.45 | 3. 6:30.27 | | 4. Patricia Castaneda | --- | 8:49.07 | 14.36s | 2 | | 5. 2:10.38 | 4. 4:23.07 | 4. 6:36.27 | | 5. Samantha Arevalo | --- | 8:51.31 | 16.60s | 7 | 0.83s | 6. 2:10.94 | 5. 4:24.36 | 5. 6:38.57 | | 6. Susana Escobar | --- | 8:52.51 | 17.80s | 6 | | 4. 2:09.95 | 6. 4:24.41 | 6. 6:40.45 | | 7. Alexia Benitez | --- | 9:03.53 | 28.82s | 8 | 0.82s | 7. 2:12.61 | 7. 4:29.03 | 7. 6:46.44 | | 8. Yanel Pinto | --- | 9:07.73 | 33.02s | 1 | 0.77s | 8. 2:12.74 | 8. 4:30.10 | 8. 6:49.38 |
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| World record: | | Pan American Games record: |
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| Qualification: | | Standard A: 9:05.8 | | Standard B: 9:22.2 |
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| Heats | Team | time | -)time | L | React. | 200m | 400m | 600m | | 1. Kristel Kobrich | CHI | 8:42.16 | | 4 | | 1. 2:09.06 | 1. 4:19.84 | 1. 6:30.97 | Heat 2. | | 2. Ashley Grace Twichell | --- | 8:47.21 | 5.05s | 5 | | 1. 2:08.50 | 1. 4:21.89 | 1. 6:34.24 | Heat 3. | | 3. Andreina Pinto | --- | 8:49.01 | 7.65s | 4 | | 1. 2:08.80 | 1. 4:22.42 | 1. 6:36.52 | Heat 1. | | 4. Susana Escobar | --- | 8:52.65 | 10.49s | 5 | | 2. 2:10.26 | 2. 4:24.58 | 2. 6:39.07 | Heat 1. | | 5. Patricia Castaneda | --- | 8:56.55 | 14.39s | 5 | | 2. 2:12.19 | 2. 4:27.86 | 2. 6:42.58 | Heat 2. | | 6. Samantha Arevalo | --- | 8:59.39 | 17.23s | 6 | 0.82s | 5. 2:15.09 | 3. 4:30.58 | 3. 6:45.47 | Heat 2. | | 7. Yanel Pinto | --- | 9:03.62 | 21.46s | 2 | 0.72s | 3. 2:11.93 | 3. 4:28.10 | 3. 6:46.53 | Heat 1. | | 8. Alexia Benitez | --- | 9:05.16 | 23.00s | 3 | | 3. 2:13.96 | 3. 4:32.11 | 3. 6:49.96 | Heat 3. | | 9. Sherry Liu | --- | 9:05.88 | 23.72s | 3 | | 4. 2:13.56 | 4. 4:30.72 | 4. 6:48.03 | Heat 2. | | 10.Bridget Coley | --- | 9:06.35 | 24.19s | 6 | 0.81s | 2. 2:12.11 | 2. 4:30.29 | 2. 6:49.73 | Heat 3. | | 11.Virginia Bardach | --- | 9:10.06 | 27.90s | 3 | | 4. 2:12.70 | 4. 4:31.37 | 4. 6:50.44 | Heat 1. | | 12.Gabriela Rocha | --- | 9:13.64 | 31.48s | 2 | | 3. 2:12.78 | 5. 4:31.07 | 5. 6:52.65 | Heat 2. | | 13.Lani Cabrera | --- | 9:20.83 | 38.67s | 7 | 0.82s | 5. 2:16.99 | 5. 4:38.96 | 4. 7:01.10 | Heat 3. | | 14.Daniela Kaori Miyahara | --- | 9:21.64 | 39.48s | 6 | 0.80s | 5. 2:16.73 | 5. 4:37.82 | 5. 6:59.44 | Heat 1. | | 15.Sarah Correa | --- | 9:27.34 | 45.18s | 2 | | 4. 2:15.20 | 4. 4:37.77 | 5. 7:02.30 | Heat 3. | | 16.Tori Alden Flowers | --- | 9:41.51 | 59.35s | 7 | 0.90s | 6. 2:21.13 | 6. 4:47.90 | 6. 7:15.00 | Heat 2. | | -. Gillian Ryan | --- | DNS | | 4 | | | Heat 3. |
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