| Silver Spring to Cortona | 4,409.42 mi (7,096.28 km) |
| Silver Spring to Cosenza | 4,742.19 mi (7,631.82 km) |
| Silver Spring to Cossato | 4,168.20 mi (6,708.07 km) |
| Silver Spring to Costa Volpino | 4,242.58 mi (6,827.78 km) |
| Silver Spring to Creazzo | 4,311.14 mi (6,938.12 km) |
| Silver Spring to Crema | 4,239.80 mi (6,823.29 km) |
| Silver Spring to Cremona | 4,262.40 mi (6,859.68 km) |
| Silver Spring to Crevalcore | 4,324.15 mi (6,959.04 km) |
| Silver Spring to Crispiano | 4,735.87 mi (7,621.64 km) |
| Silver Spring to Crosia | 4,754.93 mi (7,652.32 km) |
| Silver Spring to Crotone | 4,789.09 mi (7,707.29 km) |
| Silver Spring to Cuneo | 4,178.63 mi (6,724.85 km) |
| Silver Spring to Cuorgne | 4,151.39 mi (6,681.02 km) |
| Silver Spring to Cusano Milanino | 4,212.46 mi (6,779.29 km) |
| Silver Spring to Cutro | 4,785.07 mi (7,700.83 km) |
