| South Portland to Casamassima | 4,241.48 mi (6,826.01 km) |
| South Portland to Casandrino | 4,126.76 mi (6,641.38 km) |
| South Portland to Casapulla | 4,123.13 mi (6,635.54 km) |
| South Portland to Casarano | 4,332.29 mi (6,972.14 km) |
| South Portland to Casatenovo | 3,744.32 mi (6,025.89 km) |
| South Portland to Casciana Terme | 3,874.26 mi (6,235.02 km) |
| South Portland to Cascina | 3,865.84 mi (6,221.47 km) |
| South Portland to Caselle Torinese | 3,690.40 mi (5,939.13 km) |
| South Portland to Caserta | 4,125.30 mi (6,639.03 km) |
| South Portland to Casier | 3,871.71 mi (6,230.91 km) |
| South Portland to Casorate Primo | 3,744.43 mi (6,026.08 km) |
| South Portland to Casoria | 4,130.20 mi (6,646.92 km) |
| South Portland to Cassano al Ionio | 4,261.41 mi (6,858.07 km) |
| South Portland to Cassano d'Adda | 3,758.48 mi (6,048.69 km) |
| South Portland to Cassano delle Murge | 4,237.65 mi (6,819.83 km) |
