| South Portland to Capodrise | 4,124.49 mi (6,637.73 km) |
| South Portland to Capoterra | 3,958.17 mi (6,370.06 km) |
| South Portland to Capriolo | 3,772.66 mi (6,071.51 km) |
| South Portland to Capua | 4,118.63 mi (6,628.30 km) |
| South Portland to Capurso | 4,237.57 mi (6,819.70 km) |
| South Portland to Carate Brianza | 3,736.62 mi (6,013.50 km) |
| South Portland to Caravaggio | 3,765.03 mi (6,059.22 km) |
| South Portland to Carbonera | 3,869.86 mi (6,227.93 km) |
| South Portland to Carbonia | 3,938.09 mi (6,337.75 km) |
| South Portland to Cardito | 4,128.30 mi (6,643.86 km) |
| South Portland to Carignano | 3,700.41 mi (5,955.23 km) |
| South Portland to Carini | 4,187.55 mi (6,739.21 km) |
| South Portland to Carlentini | 4,303.34 mi (6,925.56 km) |
| South Portland to Carmagnola | 3,704.15 mi (5,961.26 km) |
| South Portland to Carmiano | 4,313.91 mi (6,942.57 km) |
