| Seia to Costessey | 944.18 mi (1,519.52 km) |
| Seia to Cottingham | 983.44 mi (1,582.69 km) |
| Seia to Coulsdon | 835.30 mi (1,344.28 km) |
| Seia to Coventry | 878.31 mi (1,413.50 km) |
| Seia to Cowdenbeath | 1,101.72 mi (1,773.04 km) |
| Seia to Cowes | 777.72 mi (1,251.62 km) |
| Seia to Cowley | 841.07 mi (1,353.57 km) |
| Seia to Cowley | 840.27 mi (1,352.29 km) |
| Seia to Cramlington | 1,051.02 mi (1,691.46 km) |
| Seia to Cranleigh | 817.10 mi (1,314.99 km) |
| Seia to Crawley | 821.45 mi (1,321.99 km) |
| Seia to Crayford | 849.71 mi (1,367.48 km) |
| Seia to Crewe | 910.00 mi (1,464.50 km) |
| Seia to Crigglestone | 957.89 mi (1,541.57 km) |
| Seia to Cromer | 962.20 mi (1,548.52 km) |
