| Swansea to Cromer | 4,206.27 mi (6,769.34 km) |
| Swansea to Crosby | 4,027.39 mi (6,481.46 km) |
| Swansea to Crowborough | 4,220.70 mi (6,792.55 km) |
| Swansea to Croxley Green | 4,179.30 mi (6,725.93 km) |
| Swansea to Croydon | 4,200.59 mi (6,760.20 km) |
| Swansea to Cudworth | 4,085.65 mi (6,575.22 km) |
| Swansea to Culcheth | 4,047.69 mi (6,514.13 km) |
| Swansea to Cullercoats | 4,044.15 mi (6,508.43 km) |
| Swansea to Cumbernauld | 3,927.45 mi (6,320.62 km) |
| Swansea to Cumnock | 3,930.03 mi (6,324.77 km) |
| Swansea to Cupar | 3,953.21 mi (6,362.07 km) |
| Swansea to Cwmbran | 4,079.21 mi (6,564.85 km) |
| Swansea to Dagenham | 4,205.18 mi (6,767.59 km) |
| Swansea to Dalkeith | 3,962.38 mi (6,376.84 km) |
| Swansea to Darfield | 4,088.06 mi (6,579.10 km) |
