| Castel Gandolfo to Cologno al Serio | 303.31 mi (488.13 km) |
| Castel Gandolfo to Cologno Monzese | 310.95 mi (500.42 km) |
| Castel Gandolfo to Colorno | 247.90 mi (398.95 km) |
| Castel Gandolfo to Comacchio | 205.40 mi (330.56 km) |
| Castel Gandolfo to Comiso | 347.37 mi (559.03 km) |
| Castel Gandolfo to Como | 332.28 mi (534.76 km) |
| Castel Gandolfo to Concordia Sagittaria | 277.92 mi (447.26 km) |
| Castel Gandolfo to Concorezzo | 312.92 mi (503.60 km) |
| Castel Gandolfo to Conegliano | 286.58 mi (461.21 km) |
| Castel Gandolfo to Conselice | 195.77 mi (315.06 km) |
| Castel Gandolfo to Conselve | 244.08 mi (392.80 km) |
| Castel Gandolfo to Conversano | 237.72 mi (382.57 km) |
| Castel Gandolfo to Copertino | 299.40 mi (481.83 km) |
| Castel Gandolfo to Copparo | 221.71 mi (356.80 km) |
| Castel Gandolfo to Corato | 198.43 mi (319.33 km) |
