|  Final 19:52 | time | gap | L | React. | 100m | 200m | 300m |  | 1. Emily Overholt |  CAN | 4:08.42 | PR | 8 | 0.78 | 59.60s | 1. | 2:02.58 | 1. | 3:06.31 | 1. |  | 2. Andreina Pinto |  VEN | 4:08.67 | 0.25 | 5 | 0.75 | 1:00.76 | 3. | 2:04.24 | 2. | 3:07.09 | 2. |  | 3. Gillian Ryan |  USA | 4:09.46 | 1.04 | 2 | 0.79 | 1:02.22 | 8. | 2:06.59 | 8. | 3:09.50 | 6. |  | 4. Manuella Lyrio |  BRA | 4:10.92 | 2.50 | 3 | 0.72 | 1:00.78 | 4. | 2:04.40 | 4. | 3:08.40 | 3. |  | 5. Kiera Janzen |  USA | 4:11.32 | 2.90 | 4 | 0.77 | 1:01.14 | 6. | 2:04.72 | 5. | 3:08.82 | 4. |  | 6. Joanna Evans |  BAH | 4:14.51 | 6.09 | 6 | 0.80 | 1:00.52 | 2. | 2:04.30 | 3. | 3:08.95 | 5. |  | 7. Carolina Bilich |  BRA | 4:17.40 | 8.98 | 1 | 0.74 | 1:01.74 | 7. | 2:06.49 | 7. | 3:12.02 | 8. |  | 8. Maria Alvarez |  COL | 4:17.80 | 9.38 | 7 | 0.83 | 1:00.93 | 5. | 2:05.15 | 6. | 3:10.56 | 7. |   
| World Record: Katie Ledecky (USA) 3:58.37, Gold Coast (AUS), 23.08.2014. |  | Pan American Games Record: Elizabeth Hill (USA) 4:10.48, Santo Domingo (DOM), 14.08.2003. |  | Qualification times. Standard A: 4:17.99, Standard B: 4:33.47. |   
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| Final B 19:43 | time | gap | L | React. | 100m | 200m | 300m |  | 9. Tabitha Baumann |  CAN | 4:16.03 |   | 5 | 0.72 | 1:01.54 | 3. | 2:06.85 | 2. | 3:12.67 | 2. |  | 10.Gabriela Santis |  GUA | 4:16.79 | 0.76 | 7 | 0.70 | 1:01.05 | 1. | 2:07.11 | 3. | 3:13.03 | 4. |  | 11.Natalia Jaspeado |  MEX | 4:17.25 | 1.22 | 4 | 0.72 | 1:01.25 | 2. | 2:06.69 | 1. | 3:12.45 | 1. |  | 12.Allyson Macias |  MEX | 4:17.49 | 1.46 | 3 | 0.72 | 1:01.98 | 4. | 2:07.17 | 4. | 3:12.86 | 3. |  | 13.Elisbet Gamez |  CUB | 4:18.23 | 2.20 | 6 | 0.77 | 1:02.14 | 5. | 2:08.34 | 5. | 3:14.01 | 5. |  | 14.Andrea Cedron |  PER | 4:23.93 | 7.90 | 2 | 0.74 | 1:02.76 | 7. | 2:09.09 | 6. | 3:16.67 | 6. |  | 15.Rebeca Quinteros |  ESA | 4:27.89 | 11.86 | 8 | 0.83 | 1:02.62 | 6. | 2:10.14 | 7. | 3:19.18 | 7. |  | 16.Daniella Van Den Berg |  ARU | 4:30.14 | 14.11 | 1 | 0.79 | 1:03.94 | 8. | 2:11.69 | 8. | 3:20.63 | 8. |   
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  Heats - Friday 17.07 10:29 |  | First 8 to Final. Next 8 to Final B.  |   
| Ranking | time | gap | L | React. | 100m | 200m | 300m | .Heat |  | 1. Kiera Janzen |  USA | 4:11.82 |   | 5 | 0.78 | 1:00.94 | 1. | 2:04.89 | 1. | 3:09.27 | 1. | Heat 3 |  | 2. Andreina Pinto |  VEN | 4:12.43 | 0.61 | 4 | 0.61 | 1:01.51 | 2. | 2:05.69 | 3. | 3:09.36 | 2. | Heat 3 |  | 3. Manuella Lyrio |  BRA | 4:15.38 | 3.56 | 3 | 0.74 | 1:02.05 | 4. | 2:06.12 | 4. | 3:10.32 | 3. | Heat 3 |  | 4. Joanna Evans |  BAH | 4:15.51 | 3.69 | 5 | 0.82 | 1:00.95 | 1. | 2:05.36 | 1. | 3:10.41 | 1. | Heat 1 |  | 5. Gillian Ryan |  USA | 4:15.95 | 4.13 | 4 | 0.81 | 1:03.48 | 5. | 2:09.22 | 5. | 3:13.23 | 2. | Heat 2 |  | 6. Maria Alvarez |  COL | 4:16.90 | 5.08 | 2 | 0.87 | 1:01.65 | 3. | 2:05.67 | 2. | 3:10.73 | 4. | Heat 3 |  | 7. Carolina Bilich |  BRA | 4:16.92 | 5.10 | 3 | 0.72 | 1:01.71 | 1. | 2:06.82 | 1. | 3:12.07 | 1. | Heat 2 |  | 8. Emily Overholt |  CAN | 4:18.21 | 6.39 | 4 | 0.80 | 1:00.99 | 2. | 2:06.11 | 2. | 3:12.99 | 2. | Heat 1 |  |  to Final B |  | 9. Natalia Jaspeado |  MEX | 4:18.30 | 6.48 | 3 | 0.77 | 1:02.18 | 3. | 2:07.79 | 3. | 3:13.75 | 3. | Heat 1 |  | 10.Tabitha Baumann |  CAN | 4:18.70 | 6.88 | 5 | 0.75 | 1:02.33 | 3. | 2:08.54 | 3. | 3:14.64 | 3. | Heat 2 |  | 11.Allyson Macias |  MEX | 4:20.45 | 8.63 | 6 | 0.74 | 1:02.49 | 5. | 2:07.67 | 5. | 3:14.31 | 5. | Heat 3 |  | 12.Elisbet Gamez |  CUB | 4:21.10 | 9.28 | 2 | 0.73 | 1:02.03 | 2. | 2:07.76 | 2. | 3:15.24 | 4. | Heat 2 |  | 13.Andrea Cedron |  PER | 4:21.31 | 9.49 | 6 | 0.76 | 1:02.64 | 4. | 2:08.90 | 4. | 3:15.60 | 5. | Heat 2 |  | 14.Gabriela Santis |  GUA | 4:24.73 | 12.91 | 6 | 0.71 | 1:02.21 | 4. | 2:08.77 | 4. | 3:17.11 | 4. | Heat 1 |  | 15.Daniella Van Den Berg |  ARU | 4:28.01 | 16.19 | 7 | 0.80 | 1:04.70 | 6. | 2:11.01 | 6. | 3:19.04 | 6. | Heat 3 |  | 16.Rebeca Quinteros |  ESA | 4:29.19 | 17.37 | 7 | 0.82 | 1:03.52 | 6. | 2:11.83 | 6. | 3:20.82 | 6. | Heat 2 |  |  eliminated |  | 17.Lani Cabrera |  BAR | 4:29.46 | 17.64 | 2 | 0.75 | 1:03.41 | 5. | 2:11.19 | 5. | 3:20.53 | 5. | Heat 1 |   
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| Swimmer | Q. time | Birth |  | Andreina Pinto |  VEN | 4:07.25 | 10 SEP 1991 |  | Gillian Ryan |  USA | 4:08.51 | 01 OCT 1995 |  | Emily Overholt |  CAN | 4:10.07 | 04 OCT 1997 |  | Kiera Janzen |  USA | 4:10.25 | 04 FEB 1993 |  | Tabitha Baumann |  CAN | 4:10.68 | 21 JUL 1995 |  | Joanna Evans |  BAH | 4:12.14 | 25 JUL 1997 |  | Manuella Lyrio |  BRA | 4:12.63 | 27 JUL 1989 |  | Carolina Bilich |  BRA | 4:14.07 | 12 JUL 1995 |  | Natalia Jaspeado |  MEX | 4:15.42 | 24 MAY 1998 |  | Allyson Macias |  MEX | 4:15.72 | 01 JAN 1997 |  | Andrea Cedron |  PER | 4:17.21 | 24 DEC 1993 |  |  Standard A: 4:17.99 |  | Gabriela Santis |  GUA | 4:18.56 | 04 NOV 1996 |  | Maria Alvarez |  COL | 4:19.27 | 10 OCT 1989 |  | Elisbet Gamez |  CUB | 4:24.56 | 17 JAN 1997 |  | Lani Cabrera |  BAR | 4:25.99 | 22 APR 1993 |  | Daniella Van Den Berg |  ARU | 4:26.14 | 24 MAY 1996 |  | Rebeca Quinteros |  ESA | 4:28.65 | 28 AUG 1997 |  |  Standard B: 4:33.47 |   
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