| Boulder to Cosham | 4,674.54 mi (7,522.94 km) |
| Boulder to Costessey | 4,676.82 mi (7,526.62 km) |
| Boulder to Cottingham | 4,576.43 mi (7,365.05 km) |
| Boulder to Coulsdon | 4,686.94 mi (7,542.90 km) |
| Boulder to Coventry | 4,595.25 mi (7,395.33 km) |
| Boulder to Cowdenbeath | 4,389.21 mi (7,063.75 km) |
| Boulder to Cowes | 4,669.73 mi (7,515.21 km) |
| Boulder to Cowley | 4,666.56 mi (7,510.10 km) |
| Boulder to Cowley | 4,632.82 mi (7,455.81 km) |
| Boulder to Cramlington | 4,486.03 mi (7,219.58 km) |
| Boulder to Cranleigh | 4,682.87 mi (7,536.34 km) |
| Boulder to Crawley | 4,694.08 mi (7,554.39 km) |
| Boulder to Crayford | 4,692.60 mi (7,552.00 km) |
| Boulder to Crewe | 4,535.92 mi (7,299.86 km) |
| Boulder to Crigglestone | 4,545.16 mi (7,314.73 km) |
