| Guadarrama to Cortona | 843.76 mi (1,357.90 km) |
| Guadarrama to Cosenza | 1,078.47 mi (1,735.63 km) |
| Guadarrama to Cossato | 703.45 mi (1,132.09 km) |
| Guadarrama to Costa Volpino | 796.44 mi (1,281.75 km) |
| Guadarrama to Creazzo | 852.51 mi (1,371.98 km) |
| Guadarrama to Crema | 766.24 mi (1,233.15 km) |
| Guadarrama to Cremona | 776.99 mi (1,250.44 km) |
| Guadarrama to Crevalcore | 821.23 mi (1,321.64 km) |
| Guadarrama to Crispiano | 1,115.22 mi (1,794.77 km) |
| Guadarrama to Crosia | 1,101.97 mi (1,773.46 km) |
| Guadarrama to Crotone | 1,126.98 mi (1,813.70 km) |
| Guadarrama to Cuneo | 644.94 mi (1,037.94 km) |
| Guadarrama to Cuorgne | 675.59 mi (1,087.26 km) |
| Guadarrama to Cusano Milanino | 748.20 mi (1,204.11 km) |
| Guadarrama to Cutro | 1,120.70 mi (1,803.59 km) |
