| Upminster to Caldicot | 128.86 mi (207.38 km) |
| Upminster to Calne | 97.39 mi (156.73 km) |
| Upminster to Cam | 112.62 mi (181.24 km) |
| Upminster to Camberley | 45.41 mi (73.08 km) |
| Upminster to Camborne | 259.07 mi (416.93 km) |
| Upminster to Cambridge | 45.23 mi (72.80 km) |
| Upminster to Cambuslang | 345.46 mi (555.96 km) |
| Upminster to Canford Cliffs | 111.53 mi (179.49 km) |
| Upminster to Cannock | 124.46 mi (200.30 km) |
| Upminster to Canterbury | 40.47 mi (65.14 km) |
| Upminster to Carlisle | 265.60 mi (427.43 km) |
| Upminster to Carlton Colville | 87.19 mi (140.32 km) |
| Upminster to Carluke | 333.54 mi (536.79 km) |
| Upminster to Carnoustie | 362.12 mi (582.78 km) |
| Upminster to Carshalton | 22.32 mi (35.92 km) |
