| Sumner to Corato | 5,825.29 mi (9,374.90 km) |
| Sumner to Corbetta | 5,381.86 mi (8,661.26 km) |
| Sumner to Corciano | 5,605.16 mi (9,020.63 km) |
| Sumner to Cordenons | 5,443.57 mi (8,760.58 km) |
| Sumner to Cori | 5,710.66 mi (9,190.41 km) |
| Sumner to Coriano | 5,562.70 mi (8,952.30 km) |
| Sumner to Corigliano Calabro | 5,923.69 mi (9,533.26 km) |
| Sumner to Corleone | 5,952.58 mi (9,579.75 km) |
| Sumner to Cormano | 5,383.27 mi (8,663.53 km) |
| Sumner to Cornaredo | 5,382.85 mi (8,662.86 km) |
| Sumner to Cornate d'Adda | 5,384.90 mi (8,666.17 km) |
| Sumner to Cornedo Vicentino | 5,433.31 mi (8,744.06 km) |
| Sumner to Correggio | 5,469.90 mi (8,802.95 km) |
| Sumner to Corridonia | 5,628.22 mi (9,057.75 km) |
| Sumner to Corsico | 5,388.89 mi (8,672.58 km) |
