| Portsmouth to Lagoa | 1,011.91 mi (1,628.51 km) |
| Portsmouth to Lagoa | 1,498.88 mi (2,412.21 km) |
| Portsmouth to Lagos | 1,017.88 mi (1,638.12 km) |
| Portsmouth to Lamego | 743.52 mi (1,196.57 km) |
| Portsmouth to Leiria | 849.85 mi (1,367.70 km) |
| Portsmouth to Lisbon | 922.34 mi (1,484.36 km) |
| Portsmouth to Loule | 1,003.08 mi (1,614.30 km) |
| Portsmouth to Loures | 915.80 mi (1,473.84 km) |
| Portsmouth to Lourinha | 893.25 mi (1,437.54 km) |
| Portsmouth to Lousa | 815.33 mi (1,312.14 km) |
| Portsmouth to Lousada | 740.12 mi (1,191.11 km) |
| Portsmouth to Macedo de Cavaleiros | 698.69 mi (1,124.43 km) |
| Portsmouth to Mafamude | 759.76 mi (1,222.71 km) |
| Portsmouth to Mafra | 912.43 mi (1,468.42 km) |
| Portsmouth to Maia | 752.71 mi (1,211.37 km) |
