| Keystone to Cockermouth | 4,237.03 mi (6,818.84 km) |
| Keystone to Colchester | 4,447.46 mi (7,157.50 km) |
| Keystone to Coleford | 4,302.24 mi (6,923.78 km) |
| Keystone to Colne | 4,293.64 mi (6,909.95 km) |
| Keystone to Colwyn Bay | 4,238.82 mi (6,821.71 km) |
| Keystone to Congleton | 4,300.75 mi (6,921.40 km) |
| Keystone to Conisbrough | 4,336.68 mi (6,979.21 km) |
| Keystone to Connahs Quay | 4,265.85 mi (6,865.23 km) |
| Keystone to Consett | 4,295.08 mi (6,912.26 km) |
| Keystone to Conwy | 4,233.63 mi (6,813.38 km) |
| Keystone to Cookstown | 4,103.20 mi (6,603.46 km) |
| Keystone to Corby | 4,372.03 mi (7,036.10 km) |
| Keystone to Corfe Mullen | 4,341.79 mi (6,987.43 km) |
| Keystone to Corsham | 4,325.24 mi (6,960.81 km) |
| Keystone to Coseley | 4,314.27 mi (6,943.14 km) |
