| Gretna to Cockermouth | 4,433.65 mi (7,135.27 km) |
| Gretna to Colchester | 4,660.55 mi (7,500.43 km) |
| Gretna to Coleford | 4,520.78 mi (7,275.50 km) |
| Gretna to Colne | 4,495.44 mi (7,234.70 km) |
| Gretna to Colwyn Bay | 4,446.83 mi (7,156.48 km) |
| Gretna to Congleton | 4,508.09 mi (7,255.07 km) |
| Gretna to Conisbrough | 4,540.32 mi (7,306.94 km) |
| Gretna to Connahs Quay | 4,473.72 mi (7,199.76 km) |
| Gretna to Consett | 4,488.52 mi (7,223.58 km) |
| Gretna to Conwy | 4,441.87 mi (7,148.50 km) |
| Gretna to Cookstown | 4,303.13 mi (6,925.21 km) |
| Gretna to Corby | 4,582.74 mi (7,375.21 km) |
| Gretna to Corfe Mullen | 4,567.42 mi (7,350.55 km) |
| Gretna to Corsham | 4,546.01 mi (7,316.09 km) |
| Gretna to Coseley | 4,526.25 mi (7,284.29 km) |
