| Bismarck to Oerlinghausen | 4,441.19 mi (7,147.41 km) |
| Bismarck to Oestrich-Winkel | 4,515.52 mi (7,267.03 km) |
| Bismarck to Offenburg | 4,587.98 mi (7,383.64 km) |
| Bismarck to Oftersheim | 4,564.71 mi (7,346.19 km) |
| Bismarck to Ohrdruf | 4,559.79 mi (7,338.27 km) |
| Bismarck to Ohringen | 4,602.09 mi (7,406.35 km) |
| Bismarck to Olbernhau | 4,646.02 mi (7,477.05 km) |
| Bismarck to Olching | 4,709.28 mi (7,578.86 km) |
| Bismarck to Oldenburg | 4,371.08 mi (7,034.58 km) |
| Bismarck to Oldenburg in Holstein | 4,393.75 mi (7,071.05 km) |
| Bismarck to Olfen | 4,413.71 mi (7,103.18 km) |
| Bismarck to Olpe | 4,461.21 mi (7,179.63 km) |
| Bismarck to Olsberg | 4,465.32 mi (7,186.25 km) |
| Bismarck to Oranienburg | 4,537.68 mi (7,302.68 km) |
| Bismarck to Ortenberg | 4,531.37 mi (7,292.53 km) |
