| Grass Valley to Cortona | 6,026.19 mi (9,698.22 km) |
| Grass Valley to Cosenza | 6,377.04 mi (10,262.85 km) |
| Grass Valley to Cossato | 5,787.51 mi (9,314.10 km) |
| Grass Valley to Costa Volpino | 5,828.35 mi (9,379.82 km) |
| Grass Valley to Creazzo | 5,883.81 mi (9,469.07 km) |
| Grass Valley to Crema | 5,842.46 mi (9,402.52 km) |
| Grass Valley to Cremona | 5,865.51 mi (9,439.63 km) |
| Grass Valley to Crevalcore | 5,920.67 mi (9,528.40 km) |
| Grass Valley to Crispiano | 6,327.48 mi (10,183.09 km) |
| Grass Valley to Crosia | 6,375.76 mi (10,260.80 km) |
| Grass Valley to Crotone | 6,414.02 mi (10,322.37 km) |
| Grass Valley to Cuneo | 5,834.29 mi (9,389.38 km) |
| Grass Valley to Cuorgne | 5,782.07 mi (9,305.34 km) |
| Grass Valley to Cusano Milanino | 5,817.90 mi (9,363.01 km) |
| Grass Valley to Cutro | 6,413.27 mi (10,321.17 km) |
