| Mason City to Nasaud | 5,123.26 mi (8,245.10 km) |
| Mason City to Navodari | 5,410.49 mi (8,707.34 km) |
| Mason City to Negresti-Oas | 5,062.46 mi (8,147.24 km) |
| Mason City to Nehoiu | 5,283.16 mi (8,502.43 km) |
| Mason City to Ocna Mures | 5,151.52 mi (8,290.57 km) |
| Mason City to Odobesti | 5,285.43 mi (8,506.08 km) |
| Mason City to Odorheiu Secuiesc | 5,201.39 mi (8,370.83 km) |
| Mason City to Oltenita | 5,360.21 mi (8,626.42 km) |
| Mason City to Onesti | 5,250.32 mi (8,449.57 km) |
| Mason City to Oradea | 5,054.42 mi (8,134.30 km) |
| Mason City to Orastie | 5,157.66 mi (8,300.44 km) |
| Mason City to Oravita | 5,148.46 mi (8,285.65 km) |
| Mason City to Orsova | 5,188.14 mi (8,349.50 km) |
| Mason City to Otelu Rosu | 5,146.61 mi (8,282.67 km) |
| Mason City to Otopeni | 5,317.67 mi (8,557.96 km) |
