| Keystone to Cividale del Friuli | 5,113.62 mi (8,229.58 km) |
| Keystone to Civita Castellana | 5,175.79 mi (8,329.64 km) |
| Keystone to Civitanova Marche | 5,207.62 mi (8,380.86 km) |
| Keystone to Civitavecchia | 5,152.94 mi (8,292.85 km) |
| Keystone to Civitella in Val di Chiana | 5,112.06 mi (8,227.07 km) |
| Keystone to Clusone | 4,965.70 mi (7,991.52 km) |
| Keystone to Coccaglio | 4,975.27 mi (8,006.93 km) |
| Keystone to Codigoro | 5,090.80 mi (8,192.85 km) |
| Keystone to Codogno | 4,973.47 mi (8,004.03 km) |
| Keystone to Codroipo | 5,097.60 mi (8,203.79 km) |
| Keystone to Cogoleto | 4,945.12 mi (7,958.39 km) |
| Keystone to Colle di Val d'Elsa | 5,085.70 mi (8,184.64 km) |
| Keystone to Colle Salvetti | 5,050.31 mi (8,127.69 km) |
| Keystone to Collecchio | 5,007.37 mi (8,058.58 km) |
| Keystone to Colleferro | 5,220.36 mi (8,401.36 km) |
