| Tortum to Oberkirch | 1,734.38 mi (2,791.21 km) |
| Tortum to Obernburg am Main | 1,700.29 mi (2,736.35 km) |
| Tortum to Obernkirchen | 1,738.62 mi (2,798.03 km) |
| Tortum to Oberschleissheim | 1,573.40 mi (2,532.14 km) |
| Tortum to Oberstdorf | 1,624.92 mi (2,615.06 km) |
| Tortum to Obertraubling | 1,555.29 mi (2,503.00 km) |
| Tortum to Obertshausen | 1,716.59 mi (2,762.58 km) |
| Tortum to Oberursel | 1,729.47 mi (2,783.32 km) |
| Tortum to Ochsenfurt | 1,657.27 mi (2,667.12 km) |
| Tortum to Ochsenhausen | 1,645.48 mi (2,648.14 km) |
| Tortum to Ochtrup | 1,816.63 mi (2,923.58 km) |
| Tortum to Odenthal | 1,802.96 mi (2,901.59 km) |
| Tortum to Oelde | 1,771.00 mi (2,850.15 km) |
| Tortum to Oelsnitz | 1,578.18 mi (2,539.83 km) |
| Tortum to Oer-Erkenschwick | 1,805.61 mi (2,905.85 km) |
