| Middelharnis to Oerlinghausen | 192.44 mi (309.70 km) |
| Middelharnis to Oestrich-Winkel | 206.12 mi (331.72 km) |
| Middelharnis to Offenburg | 281.47 mi (452.98 km) |
| Middelharnis to Oftersheim | 254.04 mi (408.83 km) |
| Middelharnis to Ohrdruf | 290.54 mi (467.58 km) |
| Middelharnis to Ohringen | 293.09 mi (471.68 km) |
| Middelharnis to Olbernhau | 403.36 mi (649.15 km) |
| Middelharnis to Olching | 400.96 mi (645.28 km) |
| Middelharnis to Oldenburg | 195.60 mi (314.79 km) |
| Middelharnis to Oldenburg in Holstein | 329.75 mi (530.69 km) |
| Middelharnis to Olfen | 137.51 mi (221.30 km) |
| Middelharnis to Olpe | 165.87 mi (266.95 km) |
| Middelharnis to Olsberg | 187.34 mi (301.49 km) |
| Middelharnis to Oranienburg | 389.46 mi (626.78 km) |
| Middelharnis to Ortenberg | 232.96 mi (374.91 km) |
