| Niagara Falls to Dillenburg | 3,909.61 mi (6,291.91 km) |
| Niagara Falls to Dillingen | 4,069.44 mi (6,549.13 km) |
| Niagara Falls to Dillingen | 3,895.89 mi (6,269.82 km) |
| Niagara Falls to Dingolfing | 4,145.78 mi (6,671.98 km) |
| Niagara Falls to Dinkelsbuhl | 4,045.61 mi (6,510.79 km) |
| Niagara Falls to Dinklage | 3,840.27 mi (6,180.32 km) |
| Niagara Falls to Dinslaken | 3,823.13 mi (6,152.74 km) |
| Niagara Falls to Dippoldiswalde | 4,106.29 mi (6,608.43 km) |
| Niagara Falls to Ditzingen | 4,005.48 mi (6,446.20 km) |
| Niagara Falls to Dobeln | 4,077.59 mi (6,562.25 km) |
| Niagara Falls to Doberlug-Kirchhain | 4,076.22 mi (6,560.04 km) |
| Niagara Falls to Donaueschingen | 4,014.02 mi (6,459.95 km) |
| Niagara Falls to Donauworth | 4,077.59 mi (6,562.25 km) |
| Niagara Falls to Donzdorf | 4,039.89 mi (6,501.57 km) |
| Niagara Falls to Dorfen | 4,145.88 mi (6,672.15 km) |
