| Round Rock to Clacton-on-Sea | 4,939.24 mi (7,948.95 km) |
| Round Rock to Clay Cross | 4,801.60 mi (7,727.42 km) |
| Round Rock to Clayton | 4,769.36 mi (7,675.54 km) |
| Round Rock to Clayton le Moors | 4,748.14 mi (7,641.39 km) |
| Round Rock to Cleckheaton | 4,774.47 mi (7,683.76 km) |
| Round Rock to Cleethorpes | 4,842.77 mi (7,793.69 km) |
| Round Rock to Clevedon | 4,793.76 mi (7,714.81 km) |
| Round Rock to Clifton | 4,817.85 mi (7,753.58 km) |
| Round Rock to Clifton | 4,790.80 mi (7,710.04 km) |
| Round Rock to Cliftonville | 4,961.56 mi (7,984.87 km) |
| Round Rock to Clitheroe | 4,745.26 mi (7,636.76 km) |
| Round Rock to Clydebank | 4,619.00 mi (7,433.56 km) |
| Round Rock to Coalville | 4,815.62 mi (7,749.99 km) |
| Round Rock to Coatbridge | 4,633.46 mi (7,456.83 km) |
| Round Rock to Cobham | 4,892.91 mi (7,874.38 km) |
