| Groningen to Coin | 1,266.83 mi (2,038.76 km) |
| Groningen to Colindres | 818.18 mi (1,316.73 km) |
| Groningen to Collado-Villalba | 1,000.05 mi (1,609.42 km) |
| Groningen to Colmenar Viejo | 992.91 mi (1,597.93 km) |
| Groningen to Colmenarejo | 1,004.74 mi (1,616.98 km) |
| Groningen to Conil de la Frontera | 1,320.99 mi (2,125.94 km) |
| Groningen to Consuegra | 1,064.65 mi (1,713.39 km) |
| Groningen to Corbera de Llobregat | 843.25 mi (1,357.07 km) |
| Groningen to Cordoba | 1,189.82 mi (1,914.83 km) |
| Groningen to Coria del Rio | 1,256.16 mi (2,021.60 km) |
| Groningen to Crevillente | 1,092.24 mi (1,757.79 km) |
| Groningen to Cuarte de Huerva | 875.53 mi (1,409.03 km) |
| Groningen to Cubellas | 860.27 mi (1,384.46 km) |
| Groningen to Cuellar | 960.06 mi (1,545.07 km) |
| Groningen to Cuenca | 996.51 mi (1,603.72 km) |
