| Grenchen to Oberriet | 102.13 mi (164.37 km) |
| Grenchen to Obersiggenthal | 46.67 mi (75.11 km) |
| Grenchen to Oberwil | 23.51 mi (37.83 km) |
| Grenchen to Oberwingert | 68.09 mi (109.58 km) |
| Grenchen to Oftringen | 25.91 mi (41.70 km) |
| Grenchen to Olten | 26.05 mi (41.93 km) |
| Grenchen to Onex | 92.84 mi (149.41 km) |
| Grenchen to Opfikon | 57.33 mi (92.26 km) |
| Grenchen to Ostermundigen | 16.86 mi (27.13 km) |
| Grenchen to Payerne | 33.82 mi (54.42 km) |
| Grenchen to Pfaffikon | 66.14 mi (106.44 km) |
| Grenchen to Plan-les-Ouates | 93.19 mi (149.97 km) |
| Grenchen to Pratteln | 26.64 mi (42.87 km) |
| Grenchen to Prilly | 58.97 mi (94.91 km) |
| Grenchen to Pully | 57.94 mi (93.24 km) |
