| Niagara Falls to Dormagen | 3,841.38 mi (6,182.11 km) |
| Niagara Falls to Dornstadt | 4,052.43 mi (6,521.76 km) |
| Niagara Falls to Dorsten | 3,828.90 mi (6,162.02 km) |
| Niagara Falls to Dortmund | 3,852.60 mi (6,200.16 km) |
| Niagara Falls to Dorverden | 3,874.87 mi (6,235.99 km) |
| Niagara Falls to Dossenheim | 3,968.37 mi (6,386.48 km) |
| Niagara Falls to Dreieich | 3,950.49 mi (6,357.69 km) |
| Niagara Falls to Drensteinfurt | 3,853.84 mi (6,202.16 km) |
| Niagara Falls to Dresden | 4,103.24 mi (6,603.53 km) |
| Niagara Falls to Drochtersen | 3,852.58 mi (6,200.12 km) |
| Niagara Falls to Drolshagen | 3,879.88 mi (6,244.07 km) |
| Niagara Falls to Duderstadt | 3,957.80 mi (6,369.47 km) |
| Niagara Falls to Duisburg | 3,828.49 mi (6,161.36 km) |
| Niagara Falls to Dulmen | 3,835.28 mi (6,172.29 km) |
| Niagara Falls to Duren | 3,838.31 mi (6,177.17 km) |
