| South Portland to Cassina de' Pecchi | 3,752.67 mi (6,039.34 km) |
| South Portland to Cassino | 4,087.18 mi (6,577.69 km) |
| South Portland to Castagneto Carducci | 3,886.16 mi (6,254.16 km) |
| South Portland to Castano Primo | 3,726.07 mi (5,996.54 km) |
| South Portland to Castel Bolognese | 3,897.15 mi (6,271.86 km) |
| South Portland to Castel Gandolfo | 4,026.62 mi (6,480.22 km) |
| South Portland to Castel Goffredo | 3,806.99 mi (6,126.76 km) |
| South Portland to Castel Maggiore | 3,869.97 mi (6,228.12 km) |
| South Portland to Castel Mella | 3,786.42 mi (6,093.65 km) |
| South Portland to Castel San Giorgio | 4,152.08 mi (6,682.13 km) |
| South Portland to Castel San Giovanni | 3,771.10 mi (6,069.00 km) |
| South Portland to Castel San Pietro Terme | 3,885.01 mi (6,252.31 km) |
| South Portland to Castel Volturno | 4,107.81 mi (6,610.88 km) |
| South Portland to Castelbuono | 4,236.46 mi (6,817.93 km) |
| South Portland to Casteldaccia | 4,206.50 mi (6,769.70 km) |
