| Niagara Falls to Denizli | 5,262.68 mi (8,469.46 km) |
| Niagara Falls to Derecik | 5,854.19 mi (9,421.41 km) |
| Niagara Falls to Dereli | 5,458.68 mi (8,784.90 km) |
| Niagara Falls to Derik | 5,699.41 mi (9,172.31 km) |
| Niagara Falls to Derinkuyu | 5,447.37 mi (8,766.70 km) |
| Niagara Falls to Develi | 5,474.47 mi (8,810.32 km) |
| Niagara Falls to Dicle | 5,639.15 mi (9,075.34 km) |
| Niagara Falls to Digor | 5,645.38 mi (9,085.36 km) |
| Niagara Falls to Dikili | 5,114.53 mi (8,231.04 km) |
| Niagara Falls to Divrigi | 5,518.55 mi (8,881.25 km) |
| Niagara Falls to Diyadin | 5,699.32 mi (9,172.18 km) |
| Niagara Falls to Diyarbakir | 5,669.56 mi (9,124.28 km) |
| Niagara Falls to Doganhisar | 5,344.25 mi (8,600.74 km) |
| Niagara Falls to Dogansehir | 5,576.07 mi (8,973.81 km) |
| Niagara Falls to Dogubayazit | 5,712.31 mi (9,193.08 km) |
