| Mason City to Cadiz | 4,420.03 mi (7,113.36 km) |
| Mason City to Calafell | 4,568.38 mi (7,352.09 km) |
| Mason City to Calahorra | 4,376.54 mi (7,043.35 km) |
| Mason City to Calasparra | 4,553.75 mi (7,328.56 km) |
| Mason City to Calatayud | 4,428.68 mi (7,127.27 km) |
| Mason City to Caldas de Montbuy | 4,574.86 mi (7,362.52 km) |
| Mason City to Caldas de Reyes | 4,082.06 mi (6,569.44 km) |
| Mason City to Calella | 4,595.86 mi (7,396.32 km) |
| Mason City to Callosa de Segura | 4,593.77 mi (7,392.97 km) |
| Mason City to Calpe | 4,611.55 mi (7,421.57 km) |
| Mason City to Calvia | 4,676.57 mi (7,526.21 km) |
| Mason City to Camas | 4,396.92 mi (7,076.16 km) |
| Mason City to Cambados | 4,078.87 mi (6,564.31 km) |
| Mason City to Cambre | 4,070.21 mi (6,550.37 km) |
| Mason City to Cambrils | 4,552.71 mi (7,326.87 km) |
