| Simi Valley to Cortona | 6,244.88 mi (10,050.17 km) |
| Simi Valley to Cosenza | 6,597.37 mi (10,617.45 km) |
| Simi Valley to Cossato | 6,002.39 mi (9,659.91 km) |
| Simi Valley to Costa Volpino | 6,049.48 mi (9,735.69 km) |
| Simi Valley to Creazzo | 6,107.91 mi (9,829.72 km) |
| Simi Valley to Crema | 6,060.95 mi (9,754.16 km) |
| Simi Valley to Cremona | 6,084.26 mi (9,791.67 km) |
| Simi Valley to Crevalcore | 6,141.32 mi (9,883.50 km) |
| Simi Valley to Crispiano | 6,554.61 mi (10,548.63 km) |
| Simi Valley to Crosia | 6,598.54 mi (10,619.32 km) |
| Simi Valley to Crotone | 6,636.59 mi (10,680.57 km) |
| Simi Valley to Cuneo | 6,043.49 mi (9,726.05 km) |
| Simi Valley to Cuorgne | 5,994.90 mi (9,647.86 km) |
| Simi Valley to Cusano Milanino | 6,035.57 mi (9,713.32 km) |
| Simi Valley to Cutro | 6,635.27 mi (10,678.43 km) |
