| Gallarate to Novi di Modena | 115.58 mi (186.01 km) |
| Gallarate to Novi Ligure | 62.58 mi (100.71 km) |
| Gallarate to Nuoro | 370.54 mi (596.32 km) |
| Gallarate to Occhiobello | 144.99 mi (233.34 km) |
| Gallarate to Oderzo | 178.70 mi (287.60 km) |
| Gallarate to Oggiono | 28.16 mi (45.32 km) |
| Gallarate to Olbia | 329.99 mi (531.08 km) |
| Gallarate to Oleggio | 8.86 mi (14.25 km) |
| Gallarate to Olgiate Comasco | 11.77 mi (18.93 km) |
| Gallarate to Olgiate Olona | 4.95 mi (7.96 km) |
| Gallarate to Omegna | 23.67 mi (38.10 km) |
| Gallarate to Opera | 28.33 mi (45.59 km) |
| Gallarate to Oppeano | 118.58 mi (190.83 km) |
| Gallarate to Orbassano | 76.00 mi (122.32 km) |
| Gallarate to Orbetello | 253.19 mi (407.47 km) |
