| South Portland to Carmignano | 3,881.24 mi (6,246.26 km) |
| South Portland to Carovigno | 4,283.54 mi (6,893.70 km) |
| South Portland to Carpenedolo | 3,802.90 mi (6,120.18 km) |
| South Portland to Carpi | 3,841.92 mi (6,182.97 km) |
| South Portland to Carrara | 3,832.71 mi (6,168.16 km) |
| South Portland to Carugate | 3,750.15 mi (6,035.28 km) |
| South Portland to Casal di Principe | 4,118.50 mi (6,628.09 km) |
| South Portland to Casale Monferrato | 3,726.63 mi (5,997.43 km) |
| South Portland to Casale sul Sile | 3,874.83 mi (6,235.94 km) |
| South Portland to Casalecchio di Reno | 3,869.33 mi (6,227.08 km) |
| South Portland to Casalgrande | 3,842.43 mi (6,183.79 km) |
| South Portland to Casalmaggiore | 3,815.06 mi (6,139.75 km) |
| South Portland to Casalnuovo di Napoli | 4,131.75 mi (6,649.40 km) |
| South Portland to Casalpusterlengo | 3,776.04 mi (6,076.95 km) |
| South Portland to Casaluce | 4,122.04 mi (6,633.79 km) |
