| Event | Time | Meet | Date |
|---|---|---|---|
| 100m Backstroke | 1:48.70 | 2026 Steve Kingston Memorial | 2026-03-06 |
| 100m Breaststroke | 1:54.71 | 2026 Steve Kingston Memorial | 2026-03-06 |
| 100m Butterfly | 2:01.58 | VAC - 36th Roy Jacobson Inv. | 2025-12-05 |
| 100m Freestyle | 1:26.31 | 2026 Steve Kingston Memorial | 2026-03-06 |
| 100m IM | 1:41.85 | 2025 York Invitational | 2025-11-15 |
| 200m Backstroke | 4:17.50 | 2025 York Invitational | 2025-11-15 |
| 200m Breaststroke | 4:18.65 | 2026 Steve Kingston Memorial | 2026-03-06 |
| 200m Freestyle | 3:21.58 | 2025 York Invitational | 2025-11-15 |
| 200m IM | 3:50.32 | VAC - 36th Roy Jacobson Inv. | 2025-12-05 |
| 50m Backstroke | 50.13 | VAC - 36th Roy Jacobson Inv. | 2025-12-05 |
| 50m Butterfly | 51.93 | 2026 Steve Kingston Memorial | 2026-03-06 |
| 50m Freestyle | 38.30 | 2026 Central Region Div 2 SC Championships | 2026-02-20 |
Costantini, David's top personal bests include 100m Backstroke (1:48.70), 100m Breaststroke (1:54.71), 100m Butterfly (2:01.58), 100m Freestyle (1:26.31), 100m IM (1:41.85).
Costantini, David swims for Vaughan Aquatic Club.
Costantini, David has competed in 6 meets.