| Mason City to Oschatz | 4,564.86 mi (7,346.43 km) |
| Mason City to Oschersleben | 4,471.91 mi (7,196.85 km) |
| Mason City to Osnabruck | 4,353.19 mi (7,005.79 km) |
| Mason City to Ostbevern | 4,356.30 mi (7,010.79 km) |
| Mason City to Osterburg | 4,455.86 mi (7,171.01 km) |
| Mason City to Ostercappeln | 4,356.66 mi (7,011.36 km) |
| Mason City to Osterhofen | 4,678.26 mi (7,528.94 km) |
| Mason City to Osterholz-Scharmbeck | 4,339.91 mi (6,984.41 km) |
| Mason City to Osternienburg | 4,506.75 mi (7,252.91 km) |
| Mason City to Osterode | 4,450.90 mi (7,163.03 km) |
| Mason City to Osterwieck | 4,456.30 mi (7,171.72 km) |
| Mason City to Ostfildern | 4,544.67 mi (7,313.94 km) |
| Mason City to Osthofen | 4,470.37 mi (7,194.37 km) |
| Mason City to Ostrhauderfehn | 4,304.50 mi (6,927.42 km) |
| Mason City to Ostringen | 4,504.65 mi (7,249.53 km) |
