| Niagara Falls to Cehegin | 3,919.37 mi (6,307.62 km) |
| Niagara Falls to Cervello | 3,970.98 mi (6,390.67 km) |
| Niagara Falls to Cervera | 3,930.89 mi (6,326.15 km) |
| Niagara Falls to Ceuti | 3,944.24 mi (6,347.64 km) |
| Niagara Falls to Cheste | 3,920.66 mi (6,309.70 km) |
| Niagara Falls to Chiclana de la Frontera | 3,775.28 mi (6,075.72 km) |
| Niagara Falls to Chipiona | 3,750.53 mi (6,035.90 km) |
| Niagara Falls to Chiva | 3,919.35 mi (6,307.59 km) |
| Niagara Falls to Churriana de la Vega | 3,867.11 mi (6,223.51 km) |
| Niagara Falls to Ciempozuelos | 3,762.67 mi (6,055.43 km) |
| Niagara Falls to Cieza | 3,931.64 mi (6,327.36 km) |
| Niagara Falls to Cisterniga | 3,665.14 mi (5,898.48 km) |
| Niagara Falls to Ciudad de Melilla | 3,968.91 mi (6,387.34 km) |
| Niagara Falls to Ciudad Real | 3,789.57 mi (6,098.72 km) |
| Niagara Falls to Ciudad-Rodrigo | 3,613.58 mi (5,815.49 km) |
