| Horbury to Oberkirch | 547.27 mi (880.75 km) |
| Horbury to Obernburg am Main | 527.47 mi (848.88 km) |
| Horbury to Obernkirchen | 454.08 mi (730.77 km) |
| Horbury to Oberschleissheim | 680.98 mi (1,095.94 km) |
| Horbury to Oberstdorf | 674.26 mi (1,085.11 km) |
| Horbury to Obertraubling | 674.03 mi (1,084.75 km) |
| Horbury to Obertshausen | 507.39 mi (816.56 km) |
| Horbury to Oberursel | 492.72 mi (792.96 km) |
| Horbury to Ochsenfurt | 569.10 mi (915.88 km) |
| Horbury to Ochsenhausen | 631.75 mi (1,016.71 km) |
| Horbury to Ochtrup | 377.60 mi (607.68 km) |
| Horbury to Odenthal | 408.22 mi (656.96 km) |
| Horbury to Oelde | 424.74 mi (683.55 km) |
| Horbury to Oelsnitz | 623.58 mi (1,003.55 km) |
| Horbury to Oer-Erkenschwick | 394.29 mi (634.55 km) |
