| Southborough to Lagoa | 1,059.33 mi (1,704.82 km) |
| Southborough to Lagoa | 1,562.40 mi (2,514.45 km) |
| Southborough to Lagos | 1,065.74 mi (1,715.15 km) |
| Southborough to Lamego | 794.22 mi (1,278.17 km) |
| Southborough to Leiria | 900.94 mi (1,449.93 km) |
| Southborough to Lisbon | 972.92 mi (1,565.76 km) |
| Southborough to Loule | 1,049.53 mi (1,689.05 km) |
| Southborough to Loures | 966.54 mi (1,555.50 km) |
| Southborough to Lourinha | 944.73 mi (1,520.39 km) |
| Southborough to Lousa | 865.68 mi (1,393.17 km) |
| Southborough to Lousada | 792.12 mi (1,274.79 km) |
| Southborough to Macedo de Cavaleiros | 747.90 mi (1,203.64 km) |
| Southborough to Mafamude | 812.28 mi (1,307.24 km) |
| Southborough to Mafra | 963.63 mi (1,550.81 km) |
| Southborough to Maia | 805.43 mi (1,296.22 km) |
