| Idar-Oberstein to Castelo Branco | 994.39 mi (1,600.31 km) |
| Idar-Oberstein to Castro Daire | 955.79 mi (1,538.20 km) |
| Idar-Oberstein to Celorico de Basto | 935.13 mi (1,504.95 km) |
| Idar-Oberstein to Chamusca | 1,053.35 mi (1,695.20 km) |
| Idar-Oberstein to Chaves | 898.31 mi (1,445.69 km) |
| Idar-Oberstein to Cinfaes | 953.63 mi (1,534.71 km) |
| Idar-Oberstein to Coimbra | 1,007.93 mi (1,622.10 km) |
| Idar-Oberstein to Condeixa-a-Nova | 1,015.21 mi (1,633.82 km) |
| Idar-Oberstein to Corroios | 1,115.14 mi (1,794.64 km) |
| Idar-Oberstein to Coruche | 1,075.21 mi (1,730.39 km) |
| Idar-Oberstein to Costa de Caparica | 1,116.61 mi (1,797.01 km) |
| Idar-Oberstein to Covilha | 970.55 mi (1,561.94 km) |
| Idar-Oberstein to Eiras | 1,006.20 mi (1,619.32 km) |
| Idar-Oberstein to Elvas | 1,032.43 mi (1,661.53 km) |
| Idar-Oberstein to Entroncamento | 1,046.90 mi (1,684.82 km) |
