| Keystone to Chivasso | 4,890.32 mi (7,870.21 km) |
| Keystone to Ciampino | 5,198.94 mi (8,366.88 km) |
| Keystone to Cicciano | 5,314.17 mi (8,552.33 km) |
| Keystone to Cingoli | 5,182.13 mi (8,339.84 km) |
| Keystone to Cinisello Balsamo | 4,941.43 mi (7,952.46 km) |
| Keystone to Cinisi | 5,330.15 mi (8,578.04 km) |
| Keystone to Cirie | 4,876.18 mi (7,847.45 km) |
| Keystone to Ciro Marina | 5,486.28 mi (8,829.32 km) |
| Keystone to Cislago | 4,927.65 mi (7,930.29 km) |
| Keystone to Cisterna di Latina | 5,215.70 mi (8,393.86 km) |
| Keystone to Cisternino | 5,456.61 mi (8,781.56 km) |
| Keystone to Citta di Castello | 5,134.99 mi (8,263.97 km) |
| Keystone to Citta Sant'Angelo | 5,245.21 mi (8,441.34 km) |
| Keystone to Cittadella | 5,053.45 mi (8,132.75 km) |
| Keystone to Cittanova | 5,469.16 mi (8,801.76 km) |
