| Ermelo to Oberkirch | 281.96 mi (453.77 km) |
| Ermelo to Obernburg am Main | 228.65 mi (367.98 km) |
| Ermelo to Obernkirchen | 147.99 mi (238.17 km) |
| Ermelo to Oberschleissheim | 383.59 mi (617.34 km) |
| Ermelo to Oberstdorf | 396.43 mi (637.99 km) |
| Ermelo to Obertraubling | 367.82 mi (591.96 km) |
| Ermelo to Obertshausen | 207.85 mi (334.50 km) |
| Ermelo to Oberursel | 193.29 mi (311.07 km) |
| Ermelo to Ochsenfurt | 266.38 mi (428.69 km) |
| Ermelo to Ochsenhausen | 349.21 mi (562.00 km) |
| Ermelo to Ochtrup | 66.88 mi (107.63 km) |
| Ermelo to Odenthal | 108.59 mi (174.75 km) |
| Ermelo to Oelde | 112.32 mi (180.77 km) |
| Ermelo to Oelsnitz | 310.97 mi (500.46 km) |
| Ermelo to Oer-Erkenschwick | 83.09 mi (133.71 km) |
