| Hornsey to Oerlinghausen | 376.23 mi (605.48 km) |
| Hornsey to Oestrich-Winkel | 370.89 mi (596.89 km) |
| Hornsey to Offenburg | 417.02 mi (671.13 km) |
| Hornsey to Oftersheim | 411.83 mi (662.77 km) |
| Hornsey to Ohrdruf | 472.17 mi (759.89 km) |
| Hornsey to Ohringen | 454.19 mi (730.95 km) |
| Hornsey to Olbernhau | 585.90 mi (942.91 km) |
| Hornsey to Olching | 559.39 mi (900.25 km) |
| Hornsey to Oldenburg | 367.37 mi (591.22 km) |
| Hornsey to Oldenburg in Holstein | 494.26 mi (795.43 km) |
| Hornsey to Olfen | 321.55 mi (517.48 km) |
| Hornsey to Olpe | 345.56 mi (556.13 km) |
| Hornsey to Olsberg | 370.36 mi (596.04 km) |
| Hornsey to Oranienburg | 570.79 mi (918.60 km) |
| Hornsey to Ortenberg | 407.79 mi (656.27 km) |
