| Swansea to Cividale del Friuli | 4,915.52 mi (7,910.76 km) |
| Swansea to Civita Castellana | 5,032.02 mi (8,098.26 km) |
| Swansea to Civitanova Marche | 5,043.60 mi (8,116.88 km) |
| Swansea to Civitavecchia | 5,015.13 mi (8,071.07 km) |
| Swansea to Civitella in Val di Chiana | 4,957.67 mi (7,978.61 km) |
| Swansea to Clusone | 4,788.14 mi (7,705.77 km) |
| Swansea to Coccaglio | 4,801.83 mi (7,727.80 km) |
| Swansea to Codigoro | 4,915.91 mi (7,911.39 km) |
| Swansea to Codogno | 4,806.76 mi (7,735.74 km) |
| Swansea to Codroipo | 4,903.62 mi (7,891.61 km) |
| Swansea to Cogoleto | 4,794.09 mi (7,715.33 km) |
| Swansea to Colle di Val d'Elsa | 4,934.69 mi (7,941.62 km) |
| Swansea to Colle Salvetti | 4,900.18 mi (7,886.08 km) |
| Swansea to Collecchio | 4,843.48 mi (7,794.83 km) |
| Swansea to Colleferro | 5,080.33 mi (8,176.00 km) |
