| Gretz-Armainvilliers to Cartagena | 791.97 mi (1,274.55 km) |
| Gretz-Armainvilliers to Cartama | 910.31 mi (1,465.00 km) |
| Gretz-Armainvilliers to Cartaya | 934.23 mi (1,503.50 km) |
| Gretz-Armainvilliers to Caspe | 535.98 mi (862.57 km) |
| Gretz-Armainvilliers to Cassa de la Selva | 473.46 mi (761.96 km) |
| Gretz-Armainvilliers to Castalla | 721.07 mi (1,160.46 km) |
| Gretz-Armainvilliers to Castellbisbal | 503.25 mi (809.91 km) |
| Gretz-Armainvilliers to Castelldefels | 516.83 mi (831.76 km) |
| Gretz-Armainvilliers to Castello de Ampurias | 448.23 mi (721.35 km) |
| Gretz-Armainvilliers to Castellon de la Plana | 620.25 mi (998.20 km) |
| Gretz-Armainvilliers to Castilleja de la Cuesta | 899.97 mi (1,448.36 km) |
| Gretz-Armainvilliers to Catarroja | 663.60 mi (1,067.96 km) |
| Gretz-Armainvilliers to Catral | 752.15 mi (1,210.46 km) |
| Gretz-Armainvilliers to Caudete | 717.71 mi (1,155.04 km) |
| Gretz-Armainvilliers to Cehegin | 769.75 mi (1,238.80 km) |
