| Mountain Ash to Cromer | 215.74 mi (347.19 km) |
| Mountain Ash to Crosby | 125.61 mi (202.14 km) |
| Mountain Ash to Crowborough | 158.56 mi (255.18 km) |
| Mountain Ash to Croxley Green | 125.76 mi (202.40 km) |
| Mountain Ash to Croydon | 142.13 mi (228.74 km) |
| Mountain Ash to Cudworth | 154.79 mi (249.12 km) |
| Mountain Ash to Culcheth | 127.50 mi (205.20 km) |
| Mountain Ash to Cullercoats | 245.06 mi (394.39 km) |
| Mountain Ash to Cumbernauld | 295.65 mi (475.80 km) |
| Mountain Ash to Cumnock | 263.10 mi (423.41 km) |
| Mountain Ash to Cupar | 320.85 mi (516.35 km) |
| Mountain Ash to Cwmbran | 15.48 mi (24.90 km) |
| Mountain Ash to Dagenham | 151.40 mi (243.65 km) |
| Mountain Ash to Dalkeith | 291.48 mi (469.09 km) |
| Mountain Ash to Darfield | 153.23 mi (246.59 km) |
