| Portsmouth to Lapua | 1,224.75 mi (1,971.04 km) |
| Portsmouth to Laukaa | 1,287.75 mi (2,072.44 km) |
| Portsmouth to Lauritsala | 1,321.92 mi (2,127.42 km) |
| Portsmouth to Lempaala | 1,189.92 mi (1,914.99 km) |
| Portsmouth to Leppavirta | 1,343.24 mi (2,161.73 km) |
| Portsmouth to Lieksa | 1,430.10 mi (2,301.52 km) |
| Portsmouth to Lieto | 1,125.86 mi (1,811.90 km) |
| Portsmouth to Liminka | 1,354.72 mi (2,180.22 km) |
| Portsmouth to Liperi | 1,391.36 mi (2,239.18 km) |
| Portsmouth to Lohja | 1,169.11 mi (1,881.50 km) |
| Portsmouth to Loimaa | 1,154.97 mi (1,858.74 km) |
| Portsmouth to Loviisa | 1,243.30 mi (2,000.90 km) |
| Portsmouth to Mantsala | 1,218.57 mi (1,961.10 km) |
| Portsmouth to Mariehamn | 1,036.67 mi (1,668.36 km) |
| Portsmouth to Masku | 1,117.38 mi (1,798.24 km) |
