| # | Swimmer | Team | Seed | Time | Diff |
| 1 |
Casey, Emma D (11)
|
MREAST |
1:14.66 |
1:12.72 |
-1.94 |
| 2 |
Langerfeld, Julia A (11)
|
MREAST |
1:16.44 |
1:15.96 |
-0.48 |
| 3 |
Lamberton, Jane F (12)
|
MREAST |
1:19.02 |
1:16.08 |
-2.94 |
| 4 |
Kohli, Eshani (11)
|
MREAST |
1:18.10 |
1:16.93 |
-1.17 |
| 5 |
Bloch, Lylah H (10)
|
MREAST |
1:18.70 |
1:16.98 |
-1.72 |
| 6 |
Bentley, Elena M (10)
|
MREAST |
1:17.85 |
1:17.23 |
-0.62 |
| 7 |
Chen, Heidi Y (11)
|
MREAST |
1:16.40 |
1:18.36 |
1.96 |
| 8 |
Brenner, Alexandra R (12)
|
MREAST |
1:22.93 |
1:21.29 |
-1.64 |
| 9 |
Obyrne, Rory L (12)
|
MREAST |
1:22.01 |
1:23.31 |
1.30 |
| 10 |
Corvalan, Zoe A (10)
|
MREAST |
1:22.94 |
1:26.90 |
3.96 |
| 11 |
McDonald, Isabel C (12)
|
MREAST |
1:29.13 |
1:27.14 |
-1.99 |
| 12 |
Campanelli, Violet M (10)
|
MREAST |
1:32.90 |
1:34.21 |
1.31 |
| 13 |
Krogsgaard, Linnea A (10)
|
MREAST |
1:37.45 |
1:35.14 |
-2.31 |
| 14 |
Chang, Barbara A (10)
|
MREAST |
|
1:37.96 |
- |
| 15 |
Sheldon, Stella A (12)
|
MREAST |
1:37.57 |
1:39.14 |
1.57 |
| 16 |
Krogsgaard, Astrid G (10)
|
MREAST |
1:44.57 |
1:42.38 |
-2.19 |
| 17 |
Bates, Pilar P (10)
|
MREAST |
1:41.63 |
1:45.25 |
3.62 |
| 18 |
Djokovic-Farrugia, Lina M (10)
|
MREAST |
1:41.66 |
1:46.14 |
4.48 |