| Donostia to Kanjiza | 1,094.90 mi (1,762.06 km) |
| Donostia to Kikinda | 1,113.69 mi (1,792.32 km) |
| Donostia to Kladovo | 1,221.37 mi (1,965.61 km) |
| Donostia to Knic | 1,132.47 mi (1,822.53 km) |
| Donostia to Knjazevac | 1,221.03 mi (1,965.05 km) |
| Donostia to Koceljeva | 1,084.44 mi (1,745.24 km) |
| Donostia to Kosjeric | 1,092.31 mi (1,757.90 km) |
| Donostia to Kovacica | 1,122.35 mi (1,806.25 km) |
| Donostia to Kovin | 1,140.28 mi (1,835.11 km) |
| Donostia to Kragujevac | 1,142.81 mi (1,839.18 km) |
| Donostia to Kraljevo | 1,132.42 mi (1,822.46 km) |
| Donostia to Krupanj | 1,063.20 mi (1,711.05 km) |
| Donostia to Krusevac | 1,165.33 mi (1,875.41 km) |
| Donostia to Kucevo | 1,175.85 mi (1,892.35 km) |
| Donostia to Kula | 1,069.24 mi (1,720.77 km) |
