| Hemel Hempstead to Cockermouth | 233.88 mi (376.39 km) |
| Hemel Hempstead to Colchester | 59.38 mi (95.57 km) |
| Hemel Hempstead to Coleford | 91.83 mi (147.78 km) |
| Hemel Hempstead to Colne | 161.82 mi (260.42 km) |
| Hemel Hempstead to Colwyn Bay | 172.40 mi (277.45 km) |
| Hemel Hempstead to Congleton | 122.05 mi (196.42 km) |
| Hemel Hempstead to Conisbrough | 123.44 mi (198.66 km) |
| Hemel Hempstead to Connahs Quay | 148.67 mi (239.26 km) |
| Hemel Hempstead to Consett | 221.25 mi (356.07 km) |
| Hemel Hempstead to Conwy | 176.34 mi (283.78 km) |
| Hemel Hempstead to Cookstown | 327.61 mi (527.24 km) |
| Hemel Hempstead to Corby | 51.74 mi (83.26 km) |
| Hemel Hempstead to Corfe Mullen | 95.34 mi (153.43 km) |
| Hemel Hempstead to Corsham | 76.87 mi (123.70 km) |
| Hemel Hempstead to Coseley | 87.84 mi (141.36 km) |
