| Mount Washington to Cortona | 4,814.79 mi (7,748.65 km) |
| Mount Washington to Cosenza | 5,154.01 mi (8,294.57 km) |
| Mount Washington to Cossato | 4,570.90 mi (7,356.15 km) |
| Mount Washington to Costa Volpino | 4,641.16 mi (7,469.22 km) |
| Mount Washington to Creazzo | 4,708.64 mi (7,577.82 km) |
| Mount Washington to Crema | 4,640.91 mi (7,468.82 km) |
| Mount Washington to Cremona | 4,663.87 mi (7,505.78 km) |
| Mount Washington to Crevalcore | 4,725.43 mi (7,604.84 km) |
| Mount Washington to Crispiano | 5,141.52 mi (8,274.48 km) |
| Mount Washington to Crosia | 5,164.93 mi (8,312.16 km) |
| Mount Washington to Crotone | 5,200.04 mi (8,368.66 km) |
| Mount Washington to Cuneo | 4,586.91 mi (7,381.92 km) |
| Mount Washington to Cuorgne | 4,555.60 mi (7,331.52 km) |
| Mount Washington to Cusano Milanino | 4,613.63 mi (7,424.92 km) |
| Mount Washington to Cutro | 5,196.44 mi (8,362.86 km) |
