| Portsmouth to Land O' Lakes (Florida) | 4,370.69 mi (7,033.94 km) |
| Portsmouth to Landover (Maryland) | 3,633.53 mi (5,847.60 km) |
| Portsmouth to Langley Park (Maryland) | 3,634.51 mi (5,849.18 km) |
| Portsmouth to Lanham (Maryland) | 3,629.98 mi (5,841.89 km) |
| Portsmouth to Lansdale (Pennsylvania) | 3,509.79 mi (5,648.46 km) |
| Portsmouth to Lansdowne (Pennsylvania) | 3,522.49 mi (5,668.90 km) |
| Portsmouth to Lansdowne (Virginia) | 3,651.17 mi (5,875.98 km) |
| Portsmouth to Lansing (Illinois) | 3,944.19 mi (6,347.55 km) |
| Portsmouth to Lansing (Kansas) | 4,336.13 mi (6,978.33 km) |
| Portsmouth to Lansing (Michigan) | 3,776.28 mi (6,077.33 km) |
| Portsmouth to Lantana (Florida) | 4,348.62 mi (6,998.43 km) |
| Portsmouth to Lantana (Texas) | 4,728.67 mi (7,610.05 km) |
| Portsmouth to Laplace (Louisiana) | 4,614.34 mi (7,426.06 km) |
| Portsmouth to Laramie (Wyoming) | 4,621.28 mi (7,437.23 km) |
| Portsmouth to Laredo (Texas) | 5,108.25 mi (8,220.94 km) |
