| Slough to Lagoa | 1,065.05 mi (1,714.04 km) |
| Slough to Lagoa | 1,540.71 mi (2,479.54 km) |
| Slough to Lagos | 1,071.02 mi (1,723.64 km) |
| Slough to Lamego | 796.52 mi (1,281.87 km) |
| Slough to Leiria | 902.79 mi (1,452.91 km) |
| Slough to Lisbon | 975.33 mi (1,569.64 km) |
| Slough to Loule | 1,056.21 mi (1,699.81 km) |
| Slough to Loures | 968.78 mi (1,559.10 km) |
| Slough to Lourinha | 946.13 mi (1,522.65 km) |
| Slough to Lousa | 868.35 mi (1,397.48 km) |
| Slough to Lousada | 792.96 mi (1,276.14 km) |
| Slough to Macedo de Cavaleiros | 751.80 mi (1,209.91 km) |
| Slough to Mafamude | 812.50 mi (1,307.59 km) |
| Slough to Mafra | 965.35 mi (1,553.59 km) |
| Slough to Maia | 805.42 mi (1,296.19 km) |
