| Mason City to Corato | 5,153.60 mi (8,293.92 km) |
| Mason City to Corbetta | 4,674.82 mi (7,523.39 km) |
| Mason City to Corciano | 4,906.14 mi (7,895.67 km) |
| Mason City to Cordenons | 4,790.47 mi (7,709.52 km) |
| Mason City to Cori | 4,999.13 mi (8,045.32 km) |
| Mason City to Coriano | 4,879.45 mi (7,852.72 km) |
| Mason City to Corigliano Calabro | 5,233.30 mi (8,422.18 km) |
| Mason City to Corleone | 5,195.06 mi (8,360.64 km) |
| Mason City to Cormano | 4,680.48 mi (7,532.50 km) |
| Mason City to Cornaredo | 4,677.71 mi (7,528.04 km) |
| Mason City to Cornate d'Adda | 4,687.22 mi (7,543.36 km) |
| Mason City to Cornedo Vicentino | 4,758.12 mi (7,657.46 km) |
| Mason City to Correggio | 4,775.37 mi (7,685.21 km) |
| Mason City to Corridonia | 4,946.69 mi (7,960.93 km) |
| Mason City to Corsico | 4,683.76 mi (7,537.78 km) |
