| Gheorgheni to Oberkirch | 822.92 mi (1,324.36 km) |
| Gheorgheni to Obernburg am Main | 784.62 mi (1,262.72 km) |
| Gheorgheni to Obernkirchen | 830.05 mi (1,335.84 km) |
| Gheorgheni to Oberschleissheim | 662.29 mi (1,065.85 km) |
| Gheorgheni to Oberstdorf | 721.00 mi (1,160.33 km) |
| Gheorgheni to Obertraubling | 640.58 mi (1,030.91 km) |
| Gheorgheni to Obertshausen | 800.83 mi (1,288.81 km) |
| Gheorgheni to Oberursel | 813.71 mi (1,309.54 km) |
| Gheorgheni to Ochsenfurt | 741.68 mi (1,193.61 km) |
| Gheorgheni to Ochsenhausen | 736.23 mi (1,184.85 km) |
| Gheorgheni to Ochtrup | 905.72 mi (1,457.61 km) |
| Gheorgheni to Odenthal | 887.91 mi (1,428.95 km) |
| Gheorgheni to Oelde | 859.08 mi (1,382.56 km) |
| Gheorgheni to Oelsnitz | 663.55 mi (1,067.87 km) |
| Gheorgheni to Oer-Erkenschwick | 892.31 mi (1,436.04 km) |
