| South Portland to Caldicot | 3,079.00 mi (4,955.17 km) |
| South Portland to Calne | 3,112.69 mi (5,009.40 km) |
| South Portland to Cam | 3,092.42 mi (4,976.77 km) |
| South Portland to Camberley | 3,166.58 mi (5,096.12 km) |
| South Portland to Camborne | 3,001.66 mi (4,830.71 km) |
| South Portland to Cambridge | 3,181.98 mi (5,120.91 km) |
| South Portland to Cambuslang | 2,947.31 mi (4,743.24 km) |
| South Portland to Canford Cliffs | 3,132.00 mi (5,040.46 km) |
| South Portland to Cannock | 3,085.67 mi (4,965.91 km) |
| South Portland to Canterbury | 3,242.01 mi (5,217.51 km) |
| South Portland to Carlisle | 3,008.80 mi (4,842.20 km) |
| South Portland to Carlton Colville | 3,239.09 mi (5,212.81 km) |
| South Portland to Carluke | 2,961.22 mi (4,765.63 km) |
| South Portland to Carnoustie | 2,991.82 mi (4,814.86 km) |
| South Portland to Carshalton | 3,189.31 mi (5,132.70 km) |
