| Mountain Ash to Cockermouth | 205.89 mi (331.35 km) |
| Mountain Ash to Colchester | 183.57 mi (295.43 km) |
| Mountain Ash to Coleford | 33.51 mi (53.94 km) |
| Mountain Ash to Colne | 158.41 mi (254.93 km) |
| Mountain Ash to Colwyn Bay | 111.96 mi (180.18 km) |
| Mountain Ash to Congleton | 113.41 mi (182.52 km) |
| Mountain Ash to Conisbrough | 153.58 mi (247.16 km) |
| Mountain Ash to Connahs Quay | 107.03 mi (172.25 km) |
| Mountain Ash to Consett | 228.08 mi (367.06 km) |
| Mountain Ash to Conwy | 112.07 mi (180.36 km) |
| Mountain Ash to Cookstown | 247.78 mi (398.76 km) |
| Mountain Ash to Corby | 126.60 mi (203.75 km) |
| Mountain Ash to Corfe Mullen | 86.23 mi (138.77 km) |
| Mountain Ash to Corsham | 54.07 mi (87.02 km) |
| Mountain Ash to Coseley | 81.40 mi (131.00 km) |
