| Mulheim to Oestrich-Winkel | 110.08 mi (177.16 km) |
| Mulheim to Offenburg | 209.83 mi (337.69 km) |
| Mulheim to Oftersheim | 160.67 mi (258.57 km) |
| Mulheim to Ohrdruf | 171.99 mi (276.80 km) |
| Mulheim to Ohringen | 192.39 mi (309.62 km) |
| Mulheim to Olbernhau | 285.00 mi (458.66 km) |
| Mulheim to Olching | 297.90 mi (479.43 km) |
| Mulheim to Oldenburg | 131.26 mi (211.24 km) |
| Mulheim to Oldenburg in Holstein | 259.22 mi (417.18 km) |
| Mulheim to Olfen | 29.36 mi (47.24 km) |
| Mulheim to Olpe | 49.98 mi (80.44 km) |
| Mulheim to Olsberg | 69.23 mi (111.41 km) |
| Mulheim to Oranienburg | 284.79 mi (458.33 km) |
| Mulheim to Ortenberg | 120.20 mi (193.45 km) |
| Mulheim to Oschatz | 268.60 mi (432.26 km) |
