| Seveso to Oberkirch | 205.73 mi (331.09 km) |
| Seveso to Obernburg am Main | 289.96 mi (466.64 km) |
| Seveso to Obernkirchen | 457.61 mi (736.45 km) |
| Seveso to Oberschleissheim | 213.43 mi (343.49 km) |
| Seveso to Oberstdorf | 133.56 mi (214.95 km) |
| Seveso to Obertraubling | 269.84 mi (434.27 km) |
| Seveso to Obertshausen | 305.94 mi (492.37 km) |
| Seveso to Oberursel | 316.12 mi (508.75 km) |
| Seveso to Ochsenfurt | 280.18 mi (450.91 km) |
| Seveso to Ochsenhausen | 172.13 mi (277.01 km) |
| Seveso to Ochtrup | 461.89 mi (743.35 km) |
| Seveso to Odenthal | 383.76 mi (617.60 km) |
| Seveso to Oelde | 430.03 mi (692.07 km) |
| Seveso to Oelsnitz | 358.20 mi (576.46 km) |
| Seveso to Oer-Erkenschwick | 423.29 mi (681.22 km) |
