| South Portland to Lapua | 3,692.08 mi (5,941.83 km) |
| South Portland to Laukaa | 3,792.48 mi (6,103.41 km) |
| South Portland to Lauritsala | 3,904.13 mi (6,283.09 km) |
| South Portland to Lempaala | 3,764.80 mi (6,058.86 km) |
| South Portland to Leppavirta | 3,841.29 mi (6,181.95 km) |
| South Portland to Lieksa | 3,873.12 mi (6,233.19 km) |
| South Portland to Lieto | 3,751.86 mi (6,038.03 km) |
| South Portland to Liminka | 3,701.77 mi (5,957.42 km) |
| South Portland to Liperi | 3,883.78 mi (6,250.35 km) |
| South Portland to Lohja | 3,808.78 mi (6,129.63 km) |
| South Portland to Loimaa | 3,759.12 mi (6,049.72 km) |
| South Portland to Loviisa | 3,866.48 mi (6,222.50 km) |
| South Portland to Mantsala | 3,833.42 mi (6,169.30 km) |
| South Portland to Mariehamn | 3,686.92 mi (5,933.52 km) |
| South Portland to Masku | 3,739.05 mi (6,017.42 km) |
