| Sierpc to Lagoa | 2,383.93 mi (3,836.56 km) |
| Sierpc to Lagos | 1,742.98 mi (2,805.06 km) |
| Sierpc to Lamego | 1,515.27 mi (2,438.58 km) |
| Sierpc to Leiria | 1,616.83 mi (2,602.04 km) |
| Sierpc to Lisbon | 1,679.70 mi (2,703.22 km) |
| Sierpc to Loule | 1,715.74 mi (2,761.22 km) |
| Sierpc to Loures | 1,675.07 mi (2,695.76 km) |
| Sierpc to Lourinha | 1,660.79 mi (2,672.79 km) |
| Sierpc to Lousa | 1,578.33 mi (2,540.08 km) |
| Sierpc to Lousada | 1,522.89 mi (2,450.86 km) |
| Sierpc to Macedo de Cavaleiros | 1,462.22 mi (2,353.22 km) |
| Sierpc to Mafamude | 1,545.52 mi (2,487.27 km) |
| Sierpc to Mafra | 1,676.14 mi (2,697.48 km) |
| Sierpc to Maia | 1,540.66 mi (2,479.45 km) |
| Sierpc to Mangualde | 1,536.45 mi (2,472.68 km) |
