| Solothurn to Opole | 528.11 mi (849.91 km) |
| Solothurn to Orzesze | 549.66 mi (884.60 km) |
| Solothurn to Osowa | 688.51 mi (1,108.04 km) |
| Solothurn to Ostroda | 705.23 mi (1,134.96 km) |
| Solothurn to Ostroleka | 739.33 mi (1,189.84 km) |
| Solothurn to Ostrow Mazowiecka | 743.54 mi (1,196.61 km) |
| Solothurn to Ostrow Wielkopolski | 553.56 mi (890.87 km) |
| Solothurn to Ostrowiec Swietokrzyski | 676.80 mi (1,089.21 km) |
| Solothurn to Ostrzeszow | 550.26 mi (885.56 km) |
| Solothurn to Oswiecim | 567.51 mi (913.32 km) |
| Solothurn to Otwock | 699.69 mi (1,126.04 km) |
| Solothurn to Ozarow Mazowiecki | 684.50 mi (1,101.59 km) |
| Solothurn to Ozimek | 539.60 mi (868.41 km) |
| Solothurn to Ozorkow | 619.10 mi (996.35 km) |
| Solothurn to Pabianice | 613.22 mi (986.88 km) |
