| Upminster to Clacton-on-Sea | 41.65 mi (67.04 km) |
| Upminster to Clay Cross | 131.42 mi (211.50 km) |
| Upminster to Clayton | 176.46 mi (283.99 km) |
| Upminster to Clayton le Moors | 188.93 mi (304.06 km) |
| Upminster to Cleckheaton | 171.12 mi (275.40 km) |
| Upminster to Cleethorpes | 138.50 mi (222.89 km) |
| Upminster to Clevedon | 133.81 mi (215.34 km) |
| Upminster to Clifton | 111.04 mi (178.71 km) |
| Upminster to Clifton | 176.22 mi (283.60 km) |
| Upminster to Cliftonville | 50.97 mi (82.03 km) |
| Upminster to Clitheroe | 194.47 mi (312.97 km) |
| Upminster to Clydebank | 355.13 mi (571.52 km) |
| Upminster to Coalville | 106.00 mi (170.58 km) |
| Upminster to Coatbridge | 345.04 mi (555.28 km) |
| Upminster to Cobham | 32.46 mi (52.24 km) |
