| Buckhurst Hill to Oerlinghausen | 369.28 mi (594.30 km) |
| Buckhurst Hill to Oestrich-Winkel | 365.27 mi (587.84 km) |
| Buckhurst Hill to Offenburg | 412.69 mi (664.16 km) |
| Buckhurst Hill to Oftersheim | 406.58 mi (654.32 km) |
| Buckhurst Hill to Ohrdruf | 465.70 mi (749.47 km) |
| Buckhurst Hill to Ohringen | 448.86 mi (722.37 km) |
| Buckhurst Hill to Olbernhau | 579.36 mi (932.38 km) |
| Buckhurst Hill to Olching | 554.29 mi (892.05 km) |
| Buckhurst Hill to Oldenburg | 360.09 mi (579.51 km) |
| Buckhurst Hill to Oldenburg in Holstein | 486.96 mi (783.68 km) |
| Buckhurst Hill to Olfen | 314.73 mi (506.51 km) |
| Buckhurst Hill to Olpe | 339.17 mi (545.85 km) |
| Buckhurst Hill to Olsberg | 363.72 mi (585.35 km) |
| Buckhurst Hill to Oranienburg | 563.65 mi (907.10 km) |
| Buckhurst Hill to Ortenberg | 401.73 mi (646.53 km) |
