| Duncan to Cromer | 4,705.95 mi (7,573.50 km) |
| Duncan to Crosby | 4,528.84 mi (7,288.47 km) |
| Duncan to Crowborough | 4,725.54 mi (7,605.02 km) |
| Duncan to Croxley Green | 4,683.29 mi (7,537.02 km) |
| Duncan to Croydon | 4,704.95 mi (7,571.89 km) |
| Duncan to Cudworth | 4,585.75 mi (7,380.05 km) |
| Duncan to Culcheth | 4,548.88 mi (7,320.72 km) |
| Duncan to Cullercoats | 4,540.39 mi (7,307.05 km) |
| Duncan to Cumbernauld | 4,422.90 mi (7,117.98 km) |
| Duncan to Cumnock | 4,427.09 mi (7,124.71 km) |
| Duncan to Cupar | 4,446.86 mi (7,156.53 km) |
| Duncan to Cwmbran | 4,584.91 mi (7,378.70 km) |
| Duncan to Dagenham | 4,708.99 mi (7,578.39 km) |
| Duncan to Dalkeith | 4,457.33 mi (7,173.38 km) |
| Duncan to Darfield | 4,588.24 mi (7,384.06 km) |
