| Opmeer to Cartagena | 1,081.69 mi (1,740.81 km) |
| Opmeer to Cartama | 1,198.24 mi (1,928.38 km) |
| Opmeer to Cartaya | 1,214.53 mi (1,954.60 km) |
| Opmeer to Caspe | 825.87 mi (1,329.11 km) |
| Opmeer to Cassa de la Selva | 753.17 mi (1,212.11 km) |
| Opmeer to Castalla | 1,010.78 mi (1,626.69 km) |
| Opmeer to Castellbisbal | 787.74 mi (1,267.75 km) |
| Opmeer to Castelldefels | 801.21 mi (1,289.42 km) |
| Opmeer to Castello de Ampurias | 726.69 mi (1,169.49 km) |
| Opmeer to Castellon de la Plana | 909.68 mi (1,463.98 km) |
| Opmeer to Castilleja de la Cuesta | 1,183.64 mi (1,904.88 km) |
| Opmeer to Catarroja | 953.28 mi (1,534.15 km) |
| Opmeer to Catral | 1,041.85 mi (1,676.70 km) |
| Opmeer to Caudete | 1,007.70 mi (1,621.74 km) |
| Opmeer to Cehegin | 1,059.91 mi (1,705.77 km) |
