| Gallarate to Oerlinghausen | 435.45 mi (700.79 km) |
| Gallarate to Oestrich-Winkel | 301.76 mi (485.64 km) |
| Gallarate to Offenburg | 197.75 mi (318.25 km) |
| Gallarate to Oftersheim | 256.22 mi (412.35 km) |
| Gallarate to Ohrdruf | 367.72 mi (591.79 km) |
| Gallarate to Ohringen | 246.48 mi (396.68 km) |
| Gallarate to Olbernhau | 403.85 mi (649.94 km) |
| Gallarate to Olching | 211.81 mi (340.88 km) |
| Gallarate to Oldenburg | 517.40 mi (832.67 km) |
| Gallarate to Oldenburg in Holstein | 603.75 mi (971.64 km) |
| Gallarate to Olfen | 423.02 mi (680.78 km) |
| Gallarate to Olpe | 372.37 mi (599.28 km) |
| Gallarate to Olsberg | 393.05 mi (632.56 km) |
| Gallarate to Oranienburg | 529.09 mi (851.49 km) |
| Gallarate to Ortenberg | 324.34 mi (521.97 km) |
