| South Portland to Cabestany | 3,564.59 mi (5,736.65 km) |
| South Portland to Cabries | 3,648.43 mi (5,871.58 km) |
| South Portland to Cachan | 3,356.76 mi (5,402.19 km) |
| South Portland to Caen | 3,233.15 mi (5,203.25 km) |
| South Portland to Cagnes-sur-Mer | 3,718.81 mi (5,984.84 km) |
| South Portland to Cahors | 3,442.33 mi (5,539.90 km) |
| South Portland to Calais | 3,281.58 mi (5,281.19 km) |
| South Portland to Caluire-et-Cuire | 3,550.35 mi (5,713.73 km) |
| South Portland to Cambrai | 3,357.46 mi (5,403.31 km) |
| South Portland to Canet-en-Roussillon | 3,566.67 mi (5,740.01 km) |
| South Portland to Cannes | 3,716.63 mi (5,981.33 km) |
| South Portland to Canteleu | 3,285.27 mi (5,287.13 km) |
| South Portland to Capbreton | 3,337.70 mi (5,371.51 km) |
| South Portland to Carcassonne | 3,521.10 mi (5,666.66 km) |
| South Portland to Carmaux | 3,486.35 mi (5,610.73 km) |
