| South Portland to Cervignano del Friuli | 3,908.78 mi (6,290.58 km) |
| South Portland to Cesa | 4,124.76 mi (6,638.16 km) |
| South Portland to Cesano Maderno | 3,739.51 mi (6,018.16 km) |
| South Portland to Cesena | 3,922.34 mi (6,312.40 km) |
| South Portland to Cesenatico | 3,926.55 mi (6,319.17 km) |
| South Portland to Cetraro | 4,256.57 mi (6,850.28 km) |
| South Portland to Cherasco | 3,717.22 mi (5,982.28 km) |
| South Portland to Chiampo | 3,832.52 mi (6,167.85 km) |
| South Portland to Chiaravalle | 3,988.03 mi (6,418.11 km) |
| South Portland to Chiari | 3,774.47 mi (6,074.42 km) |
| South Portland to Chiavari | 3,791.60 mi (6,101.99 km) |
| South Portland to Chieri | 3,703.32 mi (5,959.91 km) |
| South Portland to Chieti | 4,069.71 mi (6,549.57 km) |
| South Portland to Chioggia | 3,885.78 mi (6,253.55 km) |
| South Portland to Chiusi | 3,949.85 mi (6,356.67 km) |
