| Middlesex to Cockermouth | 3,297.87 mi (5,307.42 km) |
| Middlesex to Colchester | 3,520.70 mi (5,666.02 km) |
| Middlesex to Coleford | 3,379.78 mi (5,439.22 km) |
| Middlesex to Colne | 3,358.18 mi (5,404.46 km) |
| Middlesex to Colwyn Bay | 3,307.87 mi (5,323.50 km) |
| Middlesex to Congleton | 3,369.37 mi (5,422.48 km) |
| Middlesex to Conisbrough | 3,402.61 mi (5,475.96 km) |
| Middlesex to Connahs Quay | 3,334.83 mi (5,366.89 km) |
| Middlesex to Consett | 3,353.89 mi (5,397.57 km) |
| Middlesex to Conwy | 3,302.85 mi (5,315.42 km) |
| Middlesex to Cookstown | 3,166.12 mi (5,095.38 km) |
| Middlesex to Corby | 3,443.32 mi (5,541.49 km) |
| Middlesex to Corfe Mullen | 3,425.48 mi (5,512.77 km) |
| Middlesex to Corsham | 3,404.68 mi (5,479.30 km) |
| Middlesex to Coseley | 3,386.48 mi (5,450.02 km) |
