| Mortsel to Oestrich-Winkel | 174.69 mi (281.14 km) |
| Mortsel to Offenburg | 242.20 mi (389.78 km) |
| Mortsel to Oftersheim | 220.12 mi (354.25 km) |
| Mortsel to Ohrdruf | 273.40 mi (439.99 km) |
| Mortsel to Ohringen | 260.79 mi (419.70 km) |
| Mortsel to Olbernhau | 387.53 mi (623.67 km) |
| Mortsel to Olching | 368.26 mi (592.66 km) |
| Mortsel to Oldenburg | 209.46 mi (337.09 km) |
| Mortsel to Oldenburg in Holstein | 344.64 mi (554.65 km) |
| Mortsel to Olfen | 131.22 mi (211.18 km) |
| Mortsel to Olpe | 146.45 mi (235.69 km) |
| Mortsel to Olsberg | 174.11 mi (280.21 km) |
| Mortsel to Oranienburg | 388.89 mi (625.86 km) |
| Mortsel to Ortenberg | 208.19 mi (335.04 km) |
| Mortsel to Oschatz | 373.71 mi (601.43 km) |
