| Sierpc to Glyka Nera | 1,048.23 mi (1,686.97 km) |
| Sierpc to Grevena | 888.16 mi (1,429.36 km) |
| Sierpc to Ialysos | 1,209.72 mi (1,946.86 km) |
| Sierpc to Ilion | 1,044.06 mi (1,680.26 km) |
| Sierpc to Ilioupoli | 1,051.32 mi (1,691.94 km) |
| Sierpc to Ioannina | 915.11 mi (1,472.73 km) |
| Sierpc to Irakleio | 1,241.18 mi (1,997.49 km) |
| Sierpc to Irakleio | 1,043.52 mi (1,679.39 km) |
| Sierpc to Kaisariani | 1,049.01 mi (1,688.22 km) |
| Sierpc to Kalamaria | 863.72 mi (1,390.02 km) |
| Sierpc to Kalamata | 1,101.15 mi (1,772.14 km) |
| Sierpc to Kallithea | 1,049.74 mi (1,689.40 km) |
| Sierpc to Kalymnos | 1,153.52 mi (1,856.41 km) |
| Sierpc to Kalyvia Thorikou | 1,059.65 mi (1,705.34 km) |
| Sierpc to Kamatero | 1,042.37 mi (1,677.53 km) |
