| Rancho Santa Margarita to Cortona | 6,244.63 mi (10,049.76 km) |
| Rancho Santa Margarita to Cosenza | 6,597.24 mi (10,617.23 km) |
| Rancho Santa Margarita to Cossato | 6,001.33 mi (9,658.21 km) |
| Rancho Santa Margarita to Costa Volpino | 6,050.07 mi (9,736.64 km) |
| Rancho Santa Margarita to Creazzo | 6,109.25 mi (9,831.89 km) |
| Rancho Santa Margarita to Crema | 6,060.82 mi (9,753.95 km) |
| Rancho Santa Margarita to Cremona | 6,084.17 mi (9,791.53 km) |
| Rancho Santa Margarita to Crevalcore | 6,141.70 mi (9,884.10 km) |
| Rancho Santa Margarita to Crispiano | 6,556.38 mi (10,551.48 km) |
| Rancho Santa Margarita to Crosia | 6,599.06 mi (10,620.17 km) |
| Rancho Santa Margarita to Crotone | 6,637.03 mi (10,681.27 km) |
| Rancho Santa Margarita to Cuneo | 6,040.89 mi (9,721.87 km) |
| Rancho Santa Margarita to Cuorgne | 5,993.31 mi (9,645.31 km) |
| Rancho Santa Margarita to Cusano Milanino | 6,035.24 mi (9,712.78 km) |
| Rancho Santa Margarita to Cutro | 6,635.54 mi (10,678.88 km) |
