| Mason City to Carpentras | 4,587.89 mi (7,383.49 km) |
| Mason City to Carquefou | 4,200.96 mi (6,760.79 km) |
| Mason City to Carqueiranne | 4,669.33 mi (7,514.55 km) |
| Mason City to Carrieres-sous-Poissy | 4,272.50 mi (6,875.92 km) |
| Mason City to Carrieres-sur-Seine | 4,283.30 mi (6,893.31 km) |
| Mason City to Carros | 4,683.52 mi (7,537.39 km) |
| Mason City to Carvin | 4,246.03 mi (6,833.33 km) |
| Mason City to Castanet-Tolosan | 4,469.43 mi (7,192.85 km) |
| Mason City to Castelginest | 4,459.50 mi (7,176.88 km) |
| Mason City to Castelnau-le-Lez | 4,560.46 mi (7,339.35 km) |
| Mason City to Castelnaudary | 4,495.93 mi (7,235.50 km) |
| Mason City to Castelsarrasin | 4,432.27 mi (7,133.04 km) |
| Mason City to Castres | 4,496.17 mi (7,235.89 km) |
| Mason City to Caudebec-les-Elbeuf | 4,221.50 mi (6,793.85 km) |
| Mason City to Caudry | 4,276.94 mi (6,883.07 km) |
