| Troon to Oberkirch | 724.44 mi (1,165.87 km) |
| Troon to Obernburg am Main | 697.47 mi (1,122.46 km) |
| Troon to Obernkirchen | 603.45 mi (971.15 km) |
| Troon to Oberschleissheim | 852.42 mi (1,371.83 km) |
| Troon to Oberstdorf | 850.58 mi (1,368.88 km) |
| Troon to Obertraubling | 841.00 mi (1,353.46 km) |
| Troon to Obertshausen | 676.94 mi (1,089.43 km) |
| Troon to Oberursel | 662.18 mi (1,065.67 km) |
| Troon to Ochsenfurt | 737.74 mi (1,187.27 km) |
| Troon to Ochsenhausen | 806.96 mi (1,298.68 km) |
| Troon to Ochtrup | 533.98 mi (859.35 km) |
| Troon to Odenthal | 576.42 mi (927.66 km) |
| Troon to Oelde | 582.20 mi (936.95 km) |
| Troon to Oelsnitz | 781.70 mi (1,258.02 km) |
| Troon to Oer-Erkenschwick | 556.75 mi (896.00 km) |
