| Watford to Lagoa | 1,077.69 mi (1,734.37 km) |
| Watford to Lagoa | 1,552.79 mi (2,498.97 km) |
| Watford to Lagos | 1,083.69 mi (1,744.03 km) |
| Watford to Lamego | 809.36 mi (1,302.54 km) |
| Watford to Leiria | 915.67 mi (1,473.62 km) |
| Watford to Lisbon | 988.18 mi (1,590.32 km) |
| Watford to Loule | 1,068.77 mi (1,720.02 km) |
| Watford to Loures | 981.63 mi (1,579.79 km) |
| Watford to Lourinha | 959.03 mi (1,543.41 km) |
| Watford to Lousa | 881.18 mi (1,418.12 km) |
| Watford to Lousada | 805.87 mi (1,296.93 km) |
| Watford to Macedo de Cavaleiros | 764.54 mi (1,230.41 km) |
| Watford to Mafamude | 825.44 mi (1,328.42 km) |
| Watford to Mafra | 978.24 mi (1,574.32 km) |
| Watford to Maia | 818.37 mi (1,317.04 km) |
