| Gary to Des Plaines (Illinois) | 41.88 mi (67.39 km) |
| Gary to Desert Hot Springs (California) | 1,670.12 mi (2,687.79 km) |
| Gary to DeSoto (Texas) | 811.92 mi (1,306.65 km) |
| Gary to Destin (Florida) | 775.07 mi (1,247.36 km) |
| Gary to Destrehan (Louisiana) | 820.90 mi (1,321.11 km) |
| Gary to Detroit (Michigan) | 224.76 mi (361.71 km) |
| Gary to Diamond Bar (California) | 1,733.86 mi (2,790.37 km) |
| Gary to Diamond Springs (California) | 1,769.12 mi (2,847.12 km) |
| Gary to Dickinson (North Dakota) | 845.77 mi (1,361.14 km) |
| Gary to Dickinson (Texas) | 943.00 mi (1,517.61 km) |
| Gary to Dickson (Tennessee) | 381.87 mi (614.55 km) |
| Gary to Difficult Run (Virginia) | 558.74 mi (899.21 km) |
| Gary to Dinuba (California) | 1,743.84 mi (2,806.43 km) |
| Gary to Discovery Bay (California) | 1,825.13 mi (2,937.26 km) |
| Gary to Dix Hills (New York) | 729.58 mi (1,174.15 km) |
