| Grenchen to Noventa Vicentina | 237.55 mi (382.30 km) |
| Grenchen to Novi di Modena | 231.13 mi (371.97 km) |
| Grenchen to Novi Ligure | 180.74 mi (290.88 km) |
| Grenchen to Nuoro | 484.63 mi (779.94 km) |
| Grenchen to Occhiobello | 254.57 mi (409.69 km) |
| Grenchen to Oderzo | 261.22 mi (420.40 km) |
| Grenchen to Oggiono | 134.50 mi (216.45 km) |
| Grenchen to Olbia | 445.85 mi (717.52 km) |
| Grenchen to Oleggio | 124.70 mi (200.69 km) |
| Grenchen to Olgiate Comasco | 122.61 mi (197.32 km) |
| Grenchen to Olgiate Olona | 128.81 mi (207.31 km) |
| Grenchen to Omegna | 102.62 mi (165.15 km) |
| Grenchen to Opera | 152.13 mi (244.83 km) |
| Grenchen to Oppeano | 223.13 mi (359.09 km) |
| Grenchen to Orbassano | 151.00 mi (243.01 km) |
