| Seia to Crosby | 928.66 mi (1,494.54 km) |
| Seia to Crowborough | 825.92 mi (1,329.19 km) |
| Seia to Croxley Green | 849.10 mi (1,366.49 km) |
| Seia to Croydon | 839.02 mi (1,350.27 km) |
| Seia to Cudworth | 955.16 mi (1,537.18 km) |
| Seia to Culcheth | 932.23 mi (1,500.27 km) |
| Seia to Cullercoats | 1,049.69 mi (1,689.31 km) |
| Seia to Cumbernauld | 1,085.66 mi (1,747.20 km) |
| Seia to Cumnock | 1,050.33 mi (1,690.35 km) |
| Seia to Cupar | 1,118.71 mi (1,800.39 km) |
| Seia to Cwmbran | 807.39 mi (1,299.36 km) |
| Seia to Dagenham | 854.36 mi (1,374.96 km) |
| Seia to Dalkeith | 1,089.74 mi (1,753.76 km) |
| Seia to Darfield | 953.03 mi (1,533.75 km) |
| Seia to Darlaston | 880.78 mi (1,417.48 km) |
