| Heat 3 09.08 20:00 | Team | time | L | Rk. | | 1. Elizabeth Beisel | USA | 4:34.55 | 4 | 1. | | 2. Alessia Filippi | ITA | 4:35.11 | 5 | 3. | | 3. Yana Martynova | RUS | 4:36.25 | 3 | 5. | | 4. Maiko Fujino | JPN | 4:37.35 | 7 | 11. | | 5. Keri-Anne Payne | GBR | 4:38.69 | 6 | 15. | | 6. Tanya Hunks | CAN | 4:40.63 | 8 | 20. | | 7. Samantha Hamill | AUS | 4:41.89 | 1 | 22. | | 8. Helen Norfolk | NZL | 4:44.22 | 2 | 24. |
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| Heat 2 09.08 19:54 | Team | time | L | Rk. | | 1. Joanna Maranhao | BRA | 4:40.18 | 3 | 17. | | 2. Sara Nordenstam | NOR | 4:40.28 | 7 | 18. | | 3. Jing Liu | CHN | 4:44.96 | 5 | 25. | | 4. Joerdis Steinegger | AUT | 4:45.15 | 1 | 26. | | 5. Susana Escobar | MEX | 4:47.32 | 8 | 30. | | 6. Svetlana Karpeeva | RUS | 4:50.22 | 6 | 31. | | 7. Katharina Schiller | GER | 4:51.52 | 2 | 33. | | 8. Georgina Bardach | ARG | 5:00.87 | 4 | 36. |
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