| Mason City to Carmona | 4,412.14 mi (7,100.66 km) |
| Mason City to Cartagena | 4,611.28 mi (7,421.14 km) |
| Mason City to Cartama | 4,487.53 mi (7,221.99 km) |
| Mason City to Cartaya | 4,351.66 mi (7,003.32 km) |
| Mason City to Caspe | 4,500.46 mi (7,242.79 km) |
| Mason City to Cassa de la Selva | 4,592.92 mi (7,391.59 km) |
| Mason City to Castalla | 4,582.92 mi (7,375.50 km) |
| Mason City to Castellbisbal | 4,573.81 mi (7,360.83 km) |
| Mason City to Castelldefels | 4,581.85 mi (7,373.77 km) |
| Mason City to Castello de Ampurias | 4,585.48 mi (7,379.61 km) |
| Mason City to Castellon de la Plana | 4,552.24 mi (7,326.12 km) |
| Mason City to Castilleja de la Cuesta | 4,396.92 mi (7,076.16 km) |
| Mason City to Catarroja | 4,560.66 mi (7,339.67 km) |
| Mason City to Catral | 4,595.45 mi (7,395.67 km) |
| Mason City to Caudete | 4,564.78 mi (7,346.31 km) |
