| Horley to Oerlinghausen | 383.26 mi (616.80 km) |
| Horley to Oestrich-Winkel | 367.34 mi (591.18 km) |
| Horley to Offenburg | 406.56 mi (654.29 km) |
| Horley to Oftersheim | 405.98 mi (653.37 km) |
| Horley to Ohrdruf | 474.32 mi (763.34 km) |
| Horley to Ohringen | 448.70 mi (722.12 km) |
| Horley to Olbernhau | 588.45 mi (947.03 km) |
| Horley to Olching | 552.40 mi (889.00 km) |
| Horley to Oldenburg | 380.34 mi (612.09 km) |
| Horley to Oldenburg in Holstein | 509.70 mi (820.29 km) |
| Horley to Olfen | 327.36 mi (526.83 km) |
| Horley to Olpe | 347.37 mi (559.03 km) |
| Horley to Olsberg | 374.20 mi (602.22 km) |
| Horley to Oranienburg | 580.29 mi (933.89 km) |
| Horley to Ortenberg | 406.92 mi (654.87 km) |
