| Swansea to Cosham | 4,179.56 mi (6,726.35 km) |
| Swansea to Costessey | 4,211.42 mi (6,777.62 km) |
| Swansea to Cottingham | 4,117.02 mi (6,625.70 km) |
| Swansea to Coulsdon | 4,201.07 mi (6,760.97 km) |
| Swansea to Coventry | 4,115.78 mi (6,623.71 km) |
| Swansea to Cowdenbeath | 3,946.43 mi (6,351.16 km) |
| Swansea to Cowes | 4,172.88 mi (6,715.60 km) |
| Swansea to Cowley | 4,181.52 mi (6,729.50 km) |
| Swansea to Cowley | 4,147.01 mi (6,673.97 km) |
| Swansea to Cramlington | 4,037.28 mi (6,497.38 km) |
| Swansea to Cranleigh | 4,193.55 mi (6,748.87 km) |
| Swansea to Crawley | 4,205.70 mi (6,768.42 km) |
| Swansea to Crayford | 4,209.48 mi (6,774.50 km) |
| Swansea to Crewe | 4,060.64 mi (6,534.96 km) |
| Swansea to Crigglestone | 4,079.76 mi (6,565.74 km) |
