| Sumner to Cocentaina | 5,500.89 mi (8,852.82 km) |
| Sumner to Coin | 5,474.28 mi (8,810.00 km) |
| Sumner to Colindres | 5,150.01 mi (8,288.13 km) |
| Sumner to Collado-Villalba | 5,282.61 mi (8,501.54 km) |
| Sumner to Colmenar Viejo | 5,289.03 mi (8,511.87 km) |
| Sumner to Colmenarejo | 5,286.28 mi (8,507.45 km) |
| Sumner to Conil de la Frontera | 5,450.28 mi (8,771.38 km) |
| Sumner to Consuegra | 5,359.59 mi (8,625.42 km) |
| Sumner to Corbera de Llobregat | 5,423.30 mi (8,727.96 km) |
| Sumner to Cordoba | 5,406.90 mi (8,701.56 km) |
| Sumner to Coria del Rio | 5,396.44 mi (8,684.73 km) |
| Sumner to Crevillente | 5,516.92 mi (8,878.63 km) |
| Sumner to Cuarte de Huerva | 5,327.83 mi (8,574.32 km) |
| Sumner to Cubellas | 5,427.32 mi (8,734.42 km) |
| Sumner to Cuellar | 5,231.06 mi (8,418.59 km) |
