| Mason City to Nowy Dwor Mazowiecki | 4,753.06 mi (7,649.32 km) |
| Mason City to Nowy Sacz | 4,888.98 mi (7,868.06 km) |
| Mason City to Nowy Targ | 4,875.02 mi (7,845.59 km) |
| Mason City to Nowy Tomysl | 4,616.96 mi (7,430.29 km) |
| Mason City to Nysa | 4,740.90 mi (7,629.74 km) |
| Mason City to Oborniki | 4,623.14 mi (7,440.22 km) |
| Mason City to Oborniki Slaskie | 4,688.37 mi (7,545.21 km) |
| Mason City to Olawa | 4,718.16 mi (7,593.14 km) |
| Mason City to Olecko | 4,727.80 mi (7,608.66 km) |
| Mason City to Olesnica | 4,708.34 mi (7,577.34 km) |
| Mason City to Olesno | 4,756.50 mi (7,654.84 km) |
| Mason City to Olkusz | 4,821.25 mi (7,759.06 km) |
| Mason City to Olsztyn | 4,681.38 mi (7,533.96 km) |
| Mason City to Opalenica | 4,626.23 mi (7,445.19 km) |
| Mason City to Opoczno | 4,790.95 mi (7,710.30 km) |
