| Cwmbran to Cascais | 946.72 mi (1,523.60 km) |
| Cwmbran to Castelo Branco | 845.44 mi (1,360.60 km) |
| Cwmbran to Castro Daire | 778.66 mi (1,253.13 km) |
| Cwmbran to Celorico de Basto | 747.57 mi (1,203.09 km) |
| Cwmbran to Chamusca | 889.62 mi (1,431.71 km) |
| Cwmbran to Chaves | 716.27 mi (1,152.72 km) |
| Cwmbran to Cinfaes | 768.30 mi (1,236.47 km) |
| Cwmbran to Coimbra | 831.60 mi (1,338.33 km) |
| Cwmbran to Condeixa-a-Nova | 838.91 mi (1,350.09 km) |
| Cwmbran to Corroios | 948.27 mi (1,526.09 km) |
| Cwmbran to Coruche | 916.45 mi (1,474.88 km) |
| Cwmbran to Costa de Caparica | 947.58 mi (1,524.97 km) |
| Cwmbran to Covilha | 814.09 mi (1,310.14 km) |
| Cwmbran to Eiras | 829.47 mi (1,334.90 km) |
| Cwmbran to Elvas | 905.60 mi (1,457.43 km) |
