| Grefrath to Catania | 1,047.22 mi (1,685.33 km) |
| Grefrath to Catanzaro | 992.08 mi (1,596.60 km) |
| Grefrath to Cattolica | 589.23 mi (948.27 km) |
| Grefrath to Cava de' Tirreni | 835.96 mi (1,345.35 km) |
| Grefrath to Cavallino | 949.16 mi (1,527.53 km) |
| Grefrath to Cavarzere | 502.90 mi (809.34 km) |
| Grefrath to Cave | 727.75 mi (1,171.20 km) |
| Grefrath to Cavriago | 497.57 mi (800.77 km) |
| Grefrath to Cavriglia | 590.98 mi (951.09 km) |
| Grefrath to Cazzago San Martino | 431.83 mi (694.96 km) |
| Grefrath to Ceccano | 751.80 mi (1,209.91 km) |
| Grefrath to Cecina | 587.35 mi (945.25 km) |
| Grefrath to Cefalu | 992.16 mi (1,596.73 km) |
| Grefrath to Ceglie Messapico | 910.01 mi (1,464.52 km) |
| Grefrath to Celano | 723.98 mi (1,165.14 km) |
