| Nieder-Olm to Oestrich-Winkel | 11.02 mi (17.73 km) |
| Nieder-Olm to Offenburg | 100.35 mi (161.49 km) |
| Nieder-Olm to Oftersheim | 40.89 mi (65.81 km) |
| Nieder-Olm to Ohrdruf | 128.33 mi (206.53 km) |
| Nieder-Olm to Ohringen | 76.00 mi (122.30 km) |
| Nieder-Olm to Olbernhau | 232.42 mi (374.05 km) |
| Nieder-Olm to Olching | 183.85 mi (295.88 km) |
| Nieder-Olm to Oldenburg | 223.56 mi (359.78 km) |
| Nieder-Olm to Oldenburg in Holstein | 324.00 mi (521.43 km) |
| Nieder-Olm to Olfen | 129.97 mi (209.16 km) |
| Nieder-Olm to Olpe | 78.29 mi (125.99 km) |
| Nieder-Olm to Olsberg | 100.37 mi (161.53 km) |
| Nieder-Olm to Oranienburg | 292.96 mi (471.48 km) |
| Nieder-Olm to Ortenberg | 48.80 mi (78.54 km) |
| Nieder-Olm to Oschatz | 235.53 mi (379.05 km) |
