| Opmeer to Castelo Branco | 1,067.23 mi (1,717.54 km) |
| Opmeer to Castro Daire | 1,014.59 mi (1,632.83 km) |
| Opmeer to Celorico de Basto | 988.39 mi (1,590.67 km) |
| Opmeer to Chamusca | 1,121.25 mi (1,804.47 km) |
| Opmeer to Chaves | 952.77 mi (1,533.33 km) |
| Opmeer to Cinfaes | 1,008.57 mi (1,623.13 km) |
| Opmeer to Coimbra | 1,068.76 mi (1,720.00 km) |
| Opmeer to Condeixa-a-Nova | 1,076.27 mi (1,732.09 km) |
| Opmeer to Corroios | 1,183.19 mi (1,904.15 km) |
| Opmeer to Coruche | 1,145.95 mi (1,844.22 km) |
| Opmeer to Costa de Caparica | 1,183.70 mi (1,904.98 km) |
| Opmeer to Covilha | 1,039.26 mi (1,672.52 km) |
| Opmeer to Eiras | 1,066.79 mi (1,716.83 km) |
| Opmeer to Elvas | 1,116.20 mi (1,796.34 km) |
| Opmeer to Entroncamento | 1,113.96 mi (1,792.75 km) |
