| Illescas to Cortona | 843.46 mi (1,357.43 km) |
| Illescas to Cosenza | 1,066.73 mi (1,716.73 km) |
| Illescas to Cossato | 713.98 mi (1,149.04 km) |
| Illescas to Costa Volpino | 805.81 mi (1,296.82 km) |
| Illescas to Creazzo | 859.79 mi (1,383.70 km) |
| Illescas to Crema | 774.49 mi (1,246.42 km) |
| Illescas to Cremona | 784.14 mi (1,261.95 km) |
| Illescas to Crevalcore | 826.15 mi (1,329.56 km) |
| Illescas to Crispiano | 1,107.01 mi (1,781.55 km) |
| Illescas to Crosia | 1,091.07 mi (1,755.90 km) |
| Illescas to Crotone | 1,115.02 mi (1,794.45 km) |
| Illescas to Cuneo | 651.77 mi (1,048.91 km) |
| Illescas to Cuorgne | 686.12 mi (1,104.21 km) |
| Illescas to Cusano Milanino | 757.55 mi (1,219.15 km) |
| Illescas to Cutro | 1,108.57 mi (1,784.07 km) |
