| Donostia to Kidricevo | 894.28 mi (1,439.21 km) |
| Donostia to Kobarid | 787.87 mi (1,267.95 km) |
| Donostia to Kobilje | 924.95 mi (1,488.56 km) |
| Donostia to Kocevje | 843.83 mi (1,358.02 km) |
| Donostia to Komen | 791.88 mi (1,274.41 km) |
| Donostia to Komenda | 832.89 mi (1,340.40 km) |
| Donostia to Koper | 789.03 mi (1,269.82 km) |
| Donostia to Kostanjevica na Krki | 872.25 mi (1,403.74 km) |
| Donostia to Kostel | 845.53 mi (1,360.75 km) |
| Donostia to Kozje | 880.23 mi (1,416.59 km) |
| Donostia to Kranj | 824.98 mi (1,327.68 km) |
| Donostia to Kranjska Gora | 800.48 mi (1,288.25 km) |
| Donostia to Krizevci | 911.81 mi (1,467.42 km) |
| Donostia to Krsko | 875.73 mi (1,409.35 km) |
| Donostia to Kuzma | 911.84 mi (1,467.46 km) |
