| Donostia to Koscian | 1,051.98 mi (1,693.00 km) |
| Donostia to Koscielisko | 1,117.03 mi (1,797.69 km) |
| Donostia to Koscierzyna | 1,169.57 mi (1,882.24 km) |
| Donostia to Kostrzyn | 1,083.40 mi (1,743.57 km) |
| Donostia to Kostrzyn nad Odra | 997.53 mi (1,605.37 km) |
| Donostia to Koszalin | 1,111.83 mi (1,789.32 km) |
| Donostia to Kowary | 980.88 mi (1,578.57 km) |
| Donostia to Kozienice | 1,231.84 mi (1,982.46 km) |
| Donostia to Kozuchow | 1,001.66 mi (1,612.02 km) |
| Donostia to Kozy | 1,095.57 mi (1,763.15 km) |
| Donostia to Krakow | 1,132.91 mi (1,823.25 km) |
| Donostia to Krapkowice | 1,058.74 mi (1,703.87 km) |
| Donostia to Krasnik | 1,245.35 mi (2,004.20 km) |
| Donostia to Krasnystaw | 1,287.19 mi (2,071.53 km) |
| Donostia to Krosno | 1,204.87 mi (1,939.05 km) |
