| Mountain Ash to Clacton-on-Sea | 193.73 mi (311.78 km) |
| Mountain Ash to Clay Cross | 131.72 mi (211.99 km) |
| Mountain Ash to Clayton | 159.23 mi (256.25 km) |
| Mountain Ash to Clayton le Moors | 150.52 mi (242.25 km) |
| Mountain Ash to Cleckheaton | 157.37 mi (253.26 km) |
| Mountain Ash to Cleethorpes | 191.19 mi (307.69 km) |
| Mountain Ash to Clevedon | 28.14 mi (45.28 km) |
| Mountain Ash to Clifton | 125.67 mi (202.25 km) |
| Mountain Ash to Clifton | 184.70 mi (297.24 km) |
| Mountain Ash to Cliftonville | 206.56 mi (332.43 km) |
| Mountain Ash to Clitheroe | 156.82 mi (252.38 km) |
| Mountain Ash to Clydebank | 294.41 mi (473.81 km) |
| Mountain Ash to Coalville | 111.51 mi (179.45 km) |
| Mountain Ash to Coatbridge | 290.09 mi (466.85 km) |
| Mountain Ash to Cobham | 130.03 mi (209.26 km) |
