| Castel Gandolfo to Civita Castellana | 39.93 mi (64.25 km) |
| Castel Gandolfo to Civitanova Marche | 120.61 mi (194.10 km) |
| Castel Gandolfo to Civitavecchia | 50.13 mi (80.68 km) |
| Castel Gandolfo to Civitella in Val di Chiana | 124.79 mi (200.84 km) |
| Castel Gandolfo to Clusone | 315.90 mi (508.40 km) |
| Castel Gandolfo to Coccaglio | 295.58 mi (475.69 km) |
| Castel Gandolfo to Codigoro | 214.94 mi (345.91 km) |
| Castel Gandolfo to Codogno | 278.27 mi (447.83 km) |
| Castel Gandolfo to Codroipo | 291.73 mi (469.49 km) |
| Castel Gandolfo to Cogoleto | 272.37 mi (438.33 km) |
| Castel Gandolfo to Colle di Val d'Elsa | 137.89 mi (221.92 km) |
| Castel Gandolfo to Colle Salvetti | 168.89 mi (271.81 km) |
| Castel Gandolfo to Collecchio | 240.96 mi (387.78 km) |
| Castel Gandolfo to Colleferro | 18.83 mi (30.31 km) |
| Castel Gandolfo to Collegno | 343.32 mi (552.52 km) |
