| South Portland to Cehegin | 3,497.04 mi (5,627.94 km) |
| South Portland to Cervello | 3,561.81 mi (5,732.17 km) |
| South Portland to Cervera | 3,521.65 mi (5,667.55 km) |
| South Portland to Ceuti | 3,522.44 mi (5,668.81 km) |
| South Portland to Cheste | 3,502.93 mi (5,637.42 km) |
| South Portland to Chiclana de la Frontera | 3,345.40 mi (5,383.90 km) |
| South Portland to Chipiona | 3,320.98 mi (5,344.61 km) |
| South Portland to Chiva | 3,501.56 mi (5,635.21 km) |
| South Portland to Churriana de la Vega | 3,440.87 mi (5,537.54 km) |
| South Portland to Ciempozuelos | 3,343.43 mi (5,380.73 km) |
| South Portland to Cieza | 3,510.05 mi (5,648.87 km) |
| South Portland to Cisterniga | 3,248.73 mi (5,228.32 km) |
| South Portland to Ciudad de Melilla | 3,539.79 mi (5,696.74 km) |
| South Portland to Ciudad Real | 3,367.09 mi (5,418.81 km) |
| South Portland to Ciudad-Rodrigo | 3,192.43 mi (5,137.71 km) |
