| Seveso to Oerlinghausen | 437.42 mi (703.96 km) |
| Seveso to Oestrich-Winkel | 305.59 mi (491.80 km) |
| Seveso to Offenburg | 203.13 mi (326.91 km) |
| Seveso to Oftersheim | 258.81 mi (416.52 km) |
| Seveso to Ohrdruf | 365.65 mi (588.46 km) |
| Seveso to Ohringen | 246.32 mi (396.41 km) |
| Seveso to Olbernhau | 397.17 mi (639.18 km) |
| Seveso to Olching | 204.38 mi (328.92 km) |
| Seveso to Oldenburg | 519.88 mi (836.67 km) |
| Seveso to Oldenburg in Holstein | 603.07 mi (970.55 km) |
| Seveso to Olfen | 427.15 mi (687.43 km) |
| Seveso to Olpe | 376.04 mi (605.18 km) |
| Seveso to Olsberg | 395.42 mi (636.37 km) |
| Seveso to Oranienburg | 524.81 mi (844.60 km) |
| Seveso to Ortenberg | 325.62 mi (524.03 km) |
