| Grefrath to Cervello | 717.53 mi (1,154.75 km) |
| Grefrath to Cervera | 709.91 mi (1,142.49 km) |
| Grefrath to Ceuti | 988.05 mi (1,590.11 km) |
| Grefrath to Cheste | 886.26 mi (1,426.30 km) |
| Grefrath to Chiclana de la Frontera | 1,200.26 mi (1,931.63 km) |
| Grefrath to Chipiona | 1,188.07 mi (1,912.01 km) |
| Grefrath to Chiva | 887.45 mi (1,428.21 km) |
| Grefrath to Churriana de la Vega | 1,095.52 mi (1,763.08 km) |
| Grefrath to Ciempozuelos | 907.53 mi (1,460.53 km) |
| Grefrath to Cieza | 980.34 mi (1,577.70 km) |
| Grefrath to Cisterniga | 850.19 mi (1,368.25 km) |
| Grefrath to Ciudad de Melilla | 1,201.22 mi (1,933.18 km) |
| Grefrath to Ciudad Real | 986.90 mi (1,588.26 km) |
| Grefrath to Ciudad-Rodrigo | 963.15 mi (1,550.04 km) |
| Grefrath to Cocentaina | 929.86 mi (1,496.46 km) |
