| Mill Hill to Oerlinghausen | 380.71 mi (612.69 km) |
| Mill Hill to Oestrich-Winkel | 376.11 mi (605.29 km) |
| Mill Hill to Offenburg | 422.34 mi (679.69 km) |
| Mill Hill to Oftersheim | 417.11 mi (671.27 km) |
| Mill Hill to Ohrdruf | 477.06 mi (767.76 km) |
| Mill Hill to Ohringen | 459.46 mi (739.43 km) |
| Mill Hill to Olbernhau | 590.74 mi (950.71 km) |
| Mill Hill to Olching | 564.68 mi (908.77 km) |
| Mill Hill to Oldenburg | 371.10 mi (597.23 km) |
| Mill Hill to Oldenburg in Holstein | 497.55 mi (800.73 km) |
| Mill Hill to Olfen | 326.17 mi (524.92 km) |
| Mill Hill to Olpe | 350.50 mi (564.07 km) |
| Mill Hill to Olsberg | 375.14 mi (603.72 km) |
| Mill Hill to Oranienburg | 574.95 mi (925.29 km) |
| Mill Hill to Ortenberg | 412.88 mi (664.47 km) |
