| Groningen to Castelo Branco | 1,137.74 mi (1,831.02 km) |
| Groningen to Castro Daire | 1,086.59 mi (1,748.69 km) |
| Groningen to Celorico de Basto | 1,060.89 mi (1,707.33 km) |
| Groningen to Chamusca | 1,192.48 mi (1,919.11 km) |
| Groningen to Chaves | 1,025.05 mi (1,649.65 km) |
| Groningen to Cinfaes | 1,080.94 mi (1,739.61 km) |
| Groningen to Coimbra | 1,140.66 mi (1,835.72 km) |
| Groningen to Condeixa-a-Nova | 1,148.17 mi (1,847.80 km) |
| Groningen to Corroios | 1,254.53 mi (2,018.97 km) |
| Groningen to Coruche | 1,216.90 mi (1,958.41 km) |
| Groningen to Costa de Caparica | 1,255.15 mi (2,019.97 km) |
| Groningen to Covilha | 1,110.20 mi (1,786.69 km) |
| Groningen to Eiras | 1,138.72 mi (1,832.59 km) |
| Groningen to Elvas | 1,185.39 mi (1,907.70 km) |
| Groningen to Entroncamento | 1,185.27 mi (1,907.51 km) |
