| Grefrath to Cartagena | 1,014.20 mi (1,632.20 km) |
| Grefrath to Cartama | 1,145.24 mi (1,843.09 km) |
| Grefrath to Cartaya | 1,173.90 mi (1,889.20 km) |
| Grefrath to Caspe | 760.81 mi (1,224.40 km) |
| Grefrath to Cassa de la Selva | 672.94 mi (1,082.99 km) |
| Grefrath to Castalla | 943.54 mi (1,518.48 km) |
| Grefrath to Castellbisbal | 711.85 mi (1,145.61 km) |
| Grefrath to Castelldefels | 725.03 mi (1,166.83 km) |
| Grefrath to Castello de Ampurias | 645.81 mi (1,039.33 km) |
| Grefrath to Castellon de la Plana | 841.86 mi (1,354.85 km) |
| Grefrath to Castilleja de la Cuesta | 1,138.49 mi (1,832.23 km) |
| Grefrath to Catarroja | 886.22 mi (1,426.24 km) |
| Grefrath to Catral | 974.49 mi (1,568.28 km) |
| Grefrath to Caudete | 942.17 mi (1,516.28 km) |
| Grefrath to Cehegin | 997.05 mi (1,604.60 km) |
