| Sierning to Oestrich-Winkel | 316.08 mi (508.67 km) |
| Sierning to Offenburg | 294.70 mi (474.28 km) |
| Sierning to Oftersheim | 276.57 mi (445.09 km) |
| Sierning to Ohrdruf | 250.57 mi (403.26 km) |
| Sierning to Ohringen | 233.68 mi (376.08 km) |
| Sierning to Olbernhau | 186.41 mi (300.00 km) |
| Sierning to Olching | 138.47 mi (222.84 km) |
| Sierning to Oldenburg | 441.96 mi (711.26 km) |
| Sierning to Oldenburg in Holstein | 456.84 mi (735.22 km) |
| Sierning to Olfen | 399.05 mi (642.20 km) |
| Sierning to Olpe | 355.49 mi (572.11 km) |
| Sierning to Olsberg | 346.17 mi (557.11 km) |
| Sierning to Oranienburg | 328.81 mi (529.17 km) |
| Sierning to Ortenberg | 285.86 mi (460.05 km) |
| Sierning to Oschatz | 231.27 mi (372.20 km) |
