| Troyan to Obernburg am Main | 881.97 mi (1,419.40 km) |
| Troyan to Obernkirchen | 970.45 mi (1,561.78 km) |
| Troyan to Oberschleissheim | 734.82 mi (1,182.58 km) |
| Troyan to Oberstdorf | 768.40 mi (1,236.63 km) |
| Troyan to Obertraubling | 733.65 mi (1,180.69 km) |
| Troyan to Obertshausen | 901.31 mi (1,450.52 km) |
| Troyan to Oberursel | 915.73 mi (1,473.73 km) |
| Troyan to Ochsenfurt | 839.29 mi (1,350.70 km) |
| Troyan to Ochsenhausen | 798.49 mi (1,285.05 km) |
| Troyan to Ochtrup | 1,036.07 mi (1,667.40 km) |
| Troyan to Odenthal | 998.95 mi (1,607.66 km) |
| Troyan to Oelde | 987.84 mi (1,589.77 km) |
| Troyan to Oelsnitz | 788.83 mi (1,269.50 km) |
| Troyan to Oer-Erkenschwick | 1,014.02 mi (1,631.91 km) |
| Troyan to Oerlinghausen | 974.38 mi (1,568.11 km) |
