| Merksem to Oestrich-Winkel | 178.04 mi (286.53 km) |
| Merksem to Offenburg | 246.90 mi (397.34 km) |
| Merksem to Oftersheim | 223.92 mi (360.36 km) |
| Merksem to Ohrdruf | 274.76 mi (442.19 km) |
| Merksem to Ohringen | 264.36 mi (425.44 km) |
| Merksem to Olbernhau | 388.81 mi (625.73 km) |
| Merksem to Olching | 371.94 mi (598.58 km) |
| Merksem to Oldenburg | 206.79 mi (332.80 km) |
| Merksem to Oldenburg in Holstein | 342.02 mi (550.42 km) |
| Merksem to Olfen | 130.75 mi (210.42 km) |
| Merksem to Olpe | 147.89 mi (238.00 km) |
| Merksem to Olsberg | 174.76 mi (281.25 km) |
| Merksem to Oranienburg | 388.18 mi (624.71 km) |
| Merksem to Ortenberg | 210.56 mi (338.86 km) |
| Merksem to Oschatz | 374.40 mi (602.54 km) |
