| Keystone to Castrovillari | 5,428.19 mi (8,735.83 km) |
| Keystone to Catania | 5,447.91 mi (8,767.56 km) |
| Keystone to Catanzaro | 5,476.33 mi (8,813.31 km) |
| Keystone to Cattolica | 5,142.95 mi (8,276.78 km) |
| Keystone to Cava de' Tirreni | 5,330.11 mi (8,577.98 km) |
| Keystone to Cavallino | 5,505.68 mi (8,860.53 km) |
| Keystone to Cavarzere | 5,080.82 mi (8,176.80 km) |
| Keystone to Cave | 5,214.03 mi (8,391.17 km) |
| Keystone to Cavriago | 5,023.05 mi (8,083.81 km) |
| Keystone to Cavriglia | 5,098.57 mi (8,205.35 km) |
| Keystone to Cazzago San Martino | 4,976.92 mi (8,009.58 km) |
| Keystone to Ceccano | 5,240.05 mi (8,433.04 km) |
| Keystone to Cecina | 5,059.52 mi (8,142.51 km) |
| Keystone to Cefalu | 5,378.96 mi (8,656.61 km) |
| Keystone to Ceglie Messapico | 5,462.38 mi (8,790.85 km) |
