| Niagara Falls to Cortona | 4,330.52 mi (6,969.30 km) |
| Niagara Falls to Cosenza | 4,671.62 mi (7,518.25 km) |
| Niagara Falls to Cossato | 4,086.05 mi (6,575.86 km) |
| Niagara Falls to Costa Volpino | 4,155.20 mi (6,687.15 km) |
| Niagara Falls to Creazzo | 4,222.40 mi (6,795.30 km) |
| Niagara Falls to Crema | 4,155.57 mi (6,687.75 km) |
| Niagara Falls to Cremona | 4,178.62 mi (6,724.84 km) |
| Niagara Falls to Crevalcore | 4,240.08 mi (6,823.75 km) |
| Niagara Falls to Crispiano | 4,657.09 mi (7,494.86 km) |
| Niagara Falls to Crosia | 4,681.89 mi (7,534.77 km) |
| Niagara Falls to Crotone | 4,717.30 mi (7,591.77 km) |
| Niagara Falls to Cuneo | 4,103.77 mi (6,604.38 km) |
| Niagara Falls to Cuorgne | 4,071.19 mi (6,551.94 km) |
| Niagara Falls to Cusano Milanino | 4,128.33 mi (6,643.91 km) |
| Niagara Falls to Cutro | 4,713.85 mi (7,586.21 km) |
