| Mechelen to Oestrich-Winkel | 170.13 mi (273.80 km) |
| Mechelen to Offenburg | 234.63 mi (377.60 km) |
| Mechelen to Oftersheim | 214.57 mi (345.31 km) |
| Mechelen to Ohrdruf | 272.55 mi (438.62 km) |
| Mechelen to Ohringen | 255.67 mi (411.46 km) |
| Mechelen to Olbernhau | 386.77 mi (622.44 km) |
| Mechelen to Olching | 362.87 mi (583.98 km) |
| Mechelen to Oldenburg | 215.59 mi (346.95 km) |
| Mechelen to Oldenburg in Holstein | 350.62 mi (564.27 km) |
| Mechelen to Olfen | 133.93 mi (215.54 km) |
| Mechelen to Olpe | 145.70 mi (234.48 km) |
| Mechelen to Olsberg | 174.74 mi (281.21 km) |
| Mechelen to Oranienburg | 391.68 mi (630.35 km) |
| Mechelen to Ortenberg | 205.51 mi (330.74 km) |
| Mechelen to Oschatz | 374.03 mi (601.94 km) |
