| Solothurn to Jozefow | 698.85 mi (1,124.69 km) |
| Solothurn to Kalisz | 567.06 mi (912.60 km) |
| Solothurn to Kamien Pomorski | 563.76 mi (907.29 km) |
| Solothurn to Kamienna Gora | 456.93 mi (735.36 km) |
| Solothurn to Karczew | 698.12 mi (1,123.52 km) |
| Solothurn to Kartuzy | 676.07 mi (1,088.03 km) |
| Solothurn to Katowice | 563.33 mi (906.59 km) |
| Solothurn to Kedzierzyn-Kozle | 531.05 mi (854.64 km) |
| Solothurn to Kepno | 547.96 mi (881.85 km) |
| Solothurn to Ketrzyn | 767.96 mi (1,235.91 km) |
| Solothurn to Kety | 564.82 mi (908.99 km) |
| Solothurn to Kielce | 643.71 mi (1,035.95 km) |
| Solothurn to Kielczow | 512.49 mi (824.78 km) |
| Solothurn to Klobuck | 575.07 mi (925.49 km) |
| Solothurn to Klodzko | 470.05 mi (756.47 km) |
