| Sumner to Chivasso | 5,371.68 mi (8,644.88 km) |
| Sumner to Ciampino | 5,693.44 mi (9,162.71 km) |
| Sumner to Cicciano | 5,791.85 mi (9,321.08 km) |
| Sumner to Cingoli | 5,613.90 mi (9,034.71 km) |
| Sumner to Cinisello Balsamo | 5,384.53 mi (8,665.56 km) |
| Sumner to Cinisi | 5,926.13 mi (9,537.18 km) |
| Sumner to Cirie | 5,361.65 mi (8,628.73 km) |
| Sumner to Ciro Marina | 5,952.49 mi (9,579.61 km) |
| Sumner to Cislago | 5,372.33 mi (8,645.93 km) |
| Sumner to Cisterna di Latina | 5,711.80 mi (9,192.25 km) |
| Sumner to Cisternino | 5,875.12 mi (9,455.09 km) |
| Sumner to Citta di Castello | 5,584.47 mi (8,987.34 km) |
| Sumner to Citta Sant'Angelo | 5,685.63 mi (9,150.14 km) |
| Sumner to Cittadella | 5,441.78 mi (8,757.70 km) |
| Sumner to Cittanova | 5,990.30 mi (9,640.45 km) |
