| Castleton to Cascais | 1,084.33 mi (1,745.06 km) |
| Castleton to Castelo Branco | 983.89 mi (1,583.41 km) |
| Castleton to Castro Daire | 916.76 mi (1,475.39 km) |
| Castleton to Celorico de Basto | 885.49 mi (1,425.06 km) |
| Castleton to Chamusca | 1,027.73 mi (1,653.97 km) |
| Castleton to Chaves | 854.47 mi (1,375.13 km) |
| Castleton to Cinfaes | 906.21 mi (1,458.40 km) |
| Castleton to Coimbra | 969.53 mi (1,560.31 km) |
| Castleton to Condeixa-a-Nova | 976.82 mi (1,572.04 km) |
| Castleton to Corroios | 1,086.11 mi (1,747.92 km) |
| Castleton to Coruche | 1,054.60 mi (1,697.21 km) |
| Castleton to Costa de Caparica | 1,085.34 mi (1,746.69 km) |
| Castleton to Covilha | 952.49 mi (1,532.89 km) |
| Castleton to Eiras | 967.40 mi (1,556.87 km) |
| Castleton to Elvas | 1,044.12 mi (1,680.34 km) |
