| Horizon West to Oberkirch | 4,760.71 mi (7,661.62 km) |
| Horizon West to Obernburg am Main | 4,775.35 mi (7,685.19 km) |
| Horizon West to Obernkirchen | 4,718.92 mi (7,594.37 km) |
| Horizon West to Oberschleissheim | 4,917.09 mi (7,913.30 km) |
| Horizon West to Oberstdorf | 4,883.00 mi (7,858.43 km) |
| Horizon West to Obertraubling | 4,923.97 mi (7,924.37 km) |
| Horizon West to Obertshausen | 4,757.19 mi (7,655.96 km) |
| Horizon West to Oberursel | 4,743.35 mi (7,633.68 km) |
| Horizon West to Ochsenfurt | 4,818.66 mi (7,754.88 km) |
| Horizon West to Ochsenhausen | 4,852.14 mi (7,808.77 km) |
| Horizon West to Ochtrup | 4,642.75 mi (7,471.78 km) |
| Horizon West to Odenthal | 4,664.39 mi (7,506.62 km) |
| Horizon West to Oelde | 4,689.49 mi (7,547.01 km) |
| Horizon West to Oelsnitz | 4,886.61 mi (7,864.24 km) |
| Horizon West to Oer-Erkenschwick | 4,657.01 mi (7,494.73 km) |
