| South Portland to Cermik | 5,284.08 mi (8,503.90 km) |
| South Portland to Cesme | 4,749.10 mi (7,642.94 km) |
| South Portland to Ceyhan | 5,196.51 mi (8,362.97 km) |
| South Portland to Ceylanpinar | 5,370.85 mi (8,643.55 km) |
| South Portland to Cicekdagi | 5,018.81 mi (8,076.99 km) |
| South Portland to Cide | 4,858.30 mi (7,818.68 km) |
| South Portland to Cifteler | 4,895.78 mi (7,878.99 km) |
| South Portland to Ciftlik | 5,089.60 mi (8,190.93 km) |
| South Portland to Ciftlikkoy | 4,769.41 mi (7,675.63 km) |
| South Portland to Cihanbeyli | 5,004.74 mi (8,054.35 km) |
| South Portland to Cildir | 5,270.57 mi (8,482.17 km) |
| South Portland to Cilimli | 4,827.30 mi (7,768.80 km) |
| South Portland to Cinar | 5,341.16 mi (8,595.77 km) |
| South Portland to Cinarcik | 4,762.07 mi (7,663.81 km) |
| South Portland to Cine | 4,854.10 mi (7,811.93 km) |
