| South Portland to Caltagirone | 4,282.55 mi (6,892.11 km) |
| South Portland to Caltanissetta | 4,252.29 mi (6,843.40 km) |
| South Portland to Calvisano | 3,799.80 mi (6,115.19 km) |
| South Portland to Calvizzano | 4,125.12 mi (6,638.74 km) |
| South Portland to Camaiore | 3,846.37 mi (6,190.13 km) |
| South Portland to Cameri | 3,722.75 mi (5,991.19 km) |
| South Portland to Camisano Vicentino | 3,851.87 mi (6,198.99 km) |
| South Portland to Campagna | 4,173.97 mi (6,717.35 km) |
| South Portland to Campagnano di Roma | 4,000.70 mi (6,438.51 km) |
| South Portland to Campi Bisenzio | 3,886.25 mi (6,254.31 km) |
| South Portland to Campi Salentina | 4,310.50 mi (6,937.08 km) |
| South Portland to Campiglia Marittima | 3,890.41 mi (6,261.02 km) |
| South Portland to Campobasso | 4,120.75 mi (6,631.70 km) |
| South Portland to Campobello di Licata | 4,255.26 mi (6,848.18 km) |
| South Portland to Campobello di Mazara | 4,187.58 mi (6,739.26 km) |
