| South Portland to Lewiston (Idaho) | 2,255.97 mi (3,630.63 km) |
| South Portland to Lewiston (Maine) | 32.39 mi (52.12 km) |
| South Portland to Lewisville (North Carolina) | 746.58 mi (1,201.50 km) |
| South Portland to Lewisville (Texas) | 1,611.08 mi (2,592.77 km) |
| South Portland to Lexington (Kentucky) | 833.73 mi (1,341.77 km) |
| South Portland to Lexington (Nebraska) | 1,512.39 mi (2,433.95 km) |
| South Portland to Lexington (North Carolina) | 756.47 mi (1,217.43 km) |
| South Portland to Lexington (South Carolina) | 887.32 mi (1,428.00 km) |
| South Portland to Lexington Park (Maryland) | 490.83 mi (789.92 km) |
| South Portland to Liberal (Kansas) | 1,665.97 mi (2,681.12 km) |
| South Portland to Liberty (Missouri) | 1,281.24 mi (2,061.96 km) |
| South Portland to Liberty Lake (Washington) | 2,243.46 mi (3,610.50 km) |
| South Portland to Liberty Triangle (Florida) | 1,202.17 mi (1,934.70 km) |
| South Portland to Libertyville (Illinois) | 896.96 mi (1,443.52 km) |
| South Portland to Lighthouse Point (Florida) | 1,318.84 mi (2,122.47 km) |
