| Sierpc to Karditsa | 939.98 mi (1,512.75 km) |
| Sierpc to Kastoria | 857.75 mi (1,380.41 km) |
| Sierpc to Katerini | 881.87 mi (1,419.23 km) |
| Sierpc to Keratsini | 1,047.88 mi (1,686.39 km) |
| Sierpc to Kerkyra | 916.22 mi (1,474.51 km) |
| Sierpc to Kiato | 1,038.19 mi (1,670.80 km) |
| Sierpc to Kifisia | 1,041.71 mi (1,676.46 km) |
| Sierpc to Kilkis | 835.74 mi (1,344.99 km) |
| Sierpc to Komotini | 857.37 mi (1,379.80 km) |
| Sierpc to Korinthos | 1,044.34 mi (1,680.70 km) |
| Sierpc to Koropi | 1,054.71 mi (1,697.39 km) |
| Sierpc to Korydallos | 1,047.03 mi (1,685.04 km) |
| Sierpc to Kos | 1,166.54 mi (1,877.37 km) |
| Sierpc to Kozani | 875.11 mi (1,408.35 km) |
| Sierpc to Lagos | 854.03 mi (1,374.43 km) |
