| South Portland to Lagoa | 3,210.03 mi (5,166.05 km) |
| South Portland to Lagoa | 2,348.14 mi (3,778.96 km) |
| South Portland to Lagos | 3,200.23 mi (5,150.27 km) |
| South Portland to Lamego | 3,117.49 mi (5,017.11 km) |
| South Portland to Leiria | 3,110.68 mi (5,006.15 km) |
| South Portland to Lisbon | 3,125.34 mi (5,029.74 km) |
| South Portland to Loule | 3,231.29 mi (5,200.26 km) |
| South Portland to Loures | 3,121.18 mi (5,023.05 km) |
| South Portland to Lourinha | 3,102.45 mi (4,992.92 km) |
| South Portland to Lousa | 3,126.11 mi (5,030.99 km) |
| South Portland to Lousada | 3,091.42 mi (4,975.16 km) |
| South Portland to Macedo de Cavaleiros | 3,144.63 mi (5,060.79 km) |
| South Portland to Mafamude | 3,079.60 mi (4,956.14 km) |
| South Portland to Mafra | 3,109.90 mi (5,004.90 km) |
| South Portland to Maia | 3,075.57 mi (4,949.65 km) |
