| Round Rock to Cosham | 4,881.33 mi (7,855.74 km) |
| Round Rock to Costessey | 4,915.58 mi (7,910.87 km) |
| Round Rock to Cottingham | 4,821.60 mi (7,759.61 km) |
| Round Rock to Coulsdon | 4,903.70 mi (7,891.74 km) |
| Round Rock to Coventry | 4,819.10 mi (7,755.59 km) |
| Round Rock to Cowdenbeath | 4,651.65 mi (7,486.10 km) |
| Round Rock to Cowes | 4,874.45 mi (7,844.67 km) |
| Round Rock to Cowley | 4,884.26 mi (7,860.46 km) |
| Round Rock to Cowley | 4,849.74 mi (7,804.91 km) |
| Round Rock to Cramlington | 4,742.32 mi (7,632.03 km) |
| Round Rock to Cranleigh | 4,895.87 mi (7,879.14 km) |
| Round Rock to Crawley | 4,908.09 mi (7,898.80 km) |
| Round Rock to Crayford | 4,912.34 mi (7,905.65 km) |
| Round Rock to Crewe | 4,764.35 mi (7,667.48 km) |
| Round Rock to Crigglestone | 4,784.07 mi (7,699.22 km) |
