| Grenchen to Opole | 534.56 mi (860.29 km) |
| Grenchen to Orzesze | 556.24 mi (895.17 km) |
| Grenchen to Osowa | 694.00 mi (1,116.89 km) |
| Grenchen to Ostroda | 711.11 mi (1,144.43 km) |
| Grenchen to Ostroleka | 745.50 mi (1,199.76 km) |
| Grenchen to Ostrow Mazowiecka | 749.78 mi (1,206.65 km) |
| Grenchen to Ostrow Wielkopolski | 559.76 mi (900.85 km) |
| Grenchen to Ostrowiec Swietokrzyski | 683.34 mi (1,099.73 km) |
| Grenchen to Ostrzeszow | 556.53 mi (895.66 km) |
| Grenchen to Oswiecim | 574.11 mi (923.94 km) |
| Grenchen to Otwock | 706.03 mi (1,136.24 km) |
| Grenchen to Ozarow Mazowiecki | 690.79 mi (1,111.72 km) |
| Grenchen to Ozimek | 546.07 mi (878.81 km) |
| Grenchen to Ozorkow | 625.35 mi (1,006.40 km) |
| Grenchen to Pabianice | 619.55 mi (997.06 km) |
