| Ostwald to Oestrich-Winkel | 100.94 mi (162.44 km) |
| Ostwald to Offenburg | 11.63 mi (18.71 km) |
| Ostwald to Oftersheim | 69.05 mi (111.12 km) |
| Ostwald to Ohrdruf | 207.24 mi (333.52 km) |
| Ostwald to Ohringen | 92.73 mi (149.24 km) |
| Ostwald to Olbernhau | 290.87 mi (468.11 km) |
| Ostwald to Olching | 167.12 mi (268.95 km) |
| Ostwald to Oldenburg | 318.08 mi (511.90 km) |
| Ostwald to Oldenburg in Holstein | 419.92 mi (675.79 km) |
| Ostwald to Olfen | 219.21 mi (352.78 km) |
| Ostwald to Olpe | 170.44 mi (274.30 km) |
| Ostwald to Olsberg | 196.39 mi (316.05 km) |
| Ostwald to Oranienburg | 377.78 mi (607.97 km) |
| Ostwald to Ortenberg | 138.49 mi (222.87 km) |
| Ostwald to Oschatz | 305.87 mi (492.25 km) |
