| Final 18:21 | time | | L | | 1. Wang Jianjiahe |  China | 4:03.18 | GR | 5 | | 2. Li Bingjie | China | 4:06.46 | | 1 | | 3. Chihiro Igarashi |  Japan | 4:08.48 | | 4 | | 4. Waka Kobori | Japan | 4:11.69 | | 3 | | 5. Kim Jin-ha |  South Korea | 4:16.84 | | 8 | | 6. Gan Ching Hwee |  Singapore | 4:17.86 | | 2 | | 7. Ho Nam Wai |  Hong Kong | 4:18.77 | | 6 | | 8. Katii Tang | Hong Kong | 4:19.91 | | 7 |
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| Venue: GBK Aquatic Center. |
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Heats - Friday 24.08 Morning session 09:19 |
| Ranking | time | | L | H | | 1. Chihiro Igarashi | Japan | 4:15.89 | Q | 5 | 2 | | 2. Wang Jianjiahe | China | 4:19.02 | Q | 4 | 1 | | 3. Waka Kobori | Japan | 4:19.62 | Q | 5 | 1 | | 4. Ho Nam Wai | Hong Kong | 4:19.65 | Q | 6 | 1 | | 5. Gan Ching Hwee | Singapore | 4:19.70 | Q | 2 | 1 | | 6. Katii Tang | Hong Kong | 4:19.74 | Q | 7 | 1 | | 7. Li Bingjie | China | 4:20.53 | Q | 4 | 2 | | 8. Kim Jin-ha | South Korea | 4:21.75 | Q | 3 | 2 | | eliminated in Heats | | 9. Ammiga Himathongkom |  Thailand | 4:23.76 | | 6 | 2 | | 10.Chantal Liew | Singapore | 4:29.47 | | 1 | 2 | | 11.Adinda Larasati Dewi |  Indonesia | 4:29.56 | | 2 | 2 | | 12.Sagita Putri Krisdewanti | Indonesia | 4:30.06 | | 8 | 1 | | 13.Mai Thị Linh |  Vietnam | 4:31.99 | | 7 | 2 | | 14.Tselmeg Erdene |  Mongolia | 5:03.24 | | 8 | 2 | | -. Gabriella Doueihy |  Lebanon | DNS | | 1 | 1 | | -. Choi Jung-min | South Korea | DNS | | 3 | 1 |
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