| Oostkamp to Oestrich-Winkel | 223.71 mi (360.02 km) |
| Oostkamp to Offenburg | 279.83 mi (450.35 km) |
| Oostkamp to Oftersheim | 266.40 mi (428.73 km) |
| Oostkamp to Ohrdruf | 326.70 mi (525.78 km) |
| Oostkamp to Ohringen | 308.21 mi (496.01 km) |
| Oostkamp to Olbernhau | 440.86 mi (709.50 km) |
| Oostkamp to Olching | 414.66 mi (667.33 km) |
| Oostkamp to Oldenburg | 251.80 mi (405.23 km) |
| Oostkamp to Oldenburg in Holstein | 386.52 mi (622.04 km) |
| Oostkamp to Olfen | 182.81 mi (294.21 km) |
| Oostkamp to Olpe | 199.75 mi (321.47 km) |
| Oostkamp to Olsberg | 227.30 mi (365.81 km) |
| Oostkamp to Oranienburg | 439.59 mi (707.46 km) |
| Oostkamp to Ortenberg | 260.24 mi (418.81 km) |
| Oostkamp to Oschatz | 426.94 mi (687.09 km) |
