| Garbagnate Milanese to Oerlinghausen | 441.88 mi (711.14 km) |
| Garbagnate Milanese to Oestrich-Winkel | 309.68 mi (498.38 km) |
| Garbagnate Milanese to Offenburg | 206.84 mi (332.88 km) |
| Garbagnate Milanese to Oftersheim | 263.13 mi (423.46 km) |
| Garbagnate Milanese to Ohrdruf | 370.67 mi (596.53 km) |
| Garbagnate Milanese to Ohringen | 251.08 mi (404.08 km) |
| Garbagnate Milanese to Olbernhau | 402.48 mi (647.73 km) |
| Garbagnate Milanese to Olching | 209.70 mi (337.48 km) |
| Garbagnate Milanese to Oldenburg | 524.26 mi (843.71 km) |
| Garbagnate Milanese to Oldenburg in Holstein | 607.94 mi (978.39 km) |
| Garbagnate Milanese to Olfen | 431.20 mi (693.94 km) |
| Garbagnate Milanese to Olpe | 380.18 mi (611.84 km) |
| Garbagnate Milanese to Olsberg | 399.81 mi (643.42 km) |
| Garbagnate Milanese to Oranienburg | 530.02 mi (852.99 km) |
| Garbagnate Milanese to Ortenberg | 330.18 mi (531.37 km) |
