| Solothurn to Kluczbork | 548.18 mi (882.21 km) |
| Solothurn to Knurow | 548.25 mi (882.32 km) |
| Solothurn to Kobylka | 703.23 mi (1,131.74 km) |
| Solothurn to Kokoszki | 685.77 mi (1,103.64 km) |
| Solothurn to Kolbuszowa | 680.40 mi (1,095.00 km) |
| Solothurn to Kolno | 763.87 mi (1,229.32 km) |
| Solothurn to Kolo | 602.73 mi (969.99 km) |
| Solothurn to Kolobrzeg | 595.11 mi (957.74 km) |
| Solothurn to Koluszki | 632.31 mi (1,017.61 km) |
| Solothurn to Komorniki | 537.12 mi (864.41 km) |
| Solothurn to Konin | 590.02 mi (949.54 km) |
| Solothurn to Konskie | 642.22 mi (1,033.55 km) |
| Solothurn to Konstancin-Jeziorna | 692.93 mi (1,115.16 km) |
| Solothurn to Konstantynow Lodzki | 614.28 mi (988.59 km) |
| Solothurn to Koronowo | 622.26 mi (1,001.43 km) |
