| Horley to Oberkirch | 410.21 mi (660.16 km) |
| Horley to Obernburg am Main | 419.19 mi (674.62 km) |
| Horley to Obernkirchen | 404.44 mi (650.88 km) |
| Horley to Oberschleissheim | 561.25 mi (903.25 km) |
| Horley to Oberstdorf | 537.30 mi (864.71 km) |
| Horley to Obertraubling | 567.30 mi (912.98 km) |
| Horley to Obertshausen | 401.84 mi (646.69 km) |
| Horley to Oberursel | 388.55 mi (625.31 km) |
| Horley to Ochsenfurt | 462.53 mi (744.37 km) |
| Horley to Ochsenhausen | 500.54 mi (805.55 km) |
| Horley to Ochtrup | 323.14 mi (520.05 km) |
| Horley to Odenthal | 316.24 mi (508.93 km) |
| Horley to Oelde | 360.60 mi (580.33 km) |
| Horley to Oelsnitz | 540.76 mi (870.27 km) |
| Horley to Oer-Erkenschwick | 321.40 mi (517.24 km) |
