| Mason City to Butzbach | 4,451.26 mi (7,163.61 km) |
| Mason City to Buxtehude | 4,358.85 mi (7,014.89 km) |
| Mason City to Cadolzburg | 4,570.41 mi (7,355.36 km) |
| Mason City to Calbe | 4,494.27 mi (7,232.83 km) |
| Mason City to Calw | 4,526.95 mi (7,285.42 km) |
| Mason City to Castrop-Rauxel | 4,358.22 mi (7,013.87 km) |
| Mason City to Celle | 4,407.15 mi (7,092.63 km) |
| Mason City to Cham | 4,642.37 mi (7,471.17 km) |
| Mason City to Chemnitz | 4,579.27 mi (7,369.63 km) |
| Mason City to Clausthal-Zellerfeld | 4,450.44 mi (7,162.30 km) |
| Mason City to Cloppenburg | 4,329.93 mi (6,968.34 km) |
| Mason City to Coburg | 4,538.20 mi (7,303.53 km) |
| Mason City to Coesfeld | 4,336.68 mi (6,979.21 km) |
| Mason City to Cologne | 4,370.75 mi (7,034.03 km) |
| Mason City to Coswig | 4,588.05 mi (7,383.75 km) |
