| Potomac to Lapua | 4,153.81 mi (6,684.91 km) |
| Potomac to Laukaa | 4,253.80 mi (6,845.83 km) |
| Potomac to Lauritsala | 4,367.00 mi (7,028.01 km) |
| Potomac to Lempaala | 4,229.84 mi (6,807.27 km) |
| Potomac to Leppavirta | 4,301.27 mi (6,922.22 km) |
| Potomac to Lieksa | 4,329.57 mi (6,967.76 km) |
| Potomac to Lieto | 4,219.25 mi (6,790.23 km) |
| Potomac to Liminka | 4,157.33 mi (6,690.58 km) |
| Potomac to Liperi | 4,342.59 mi (6,988.73 km) |
| Potomac to Lohja | 4,275.80 mi (6,881.24 km) |
| Potomac to Loimaa | 4,225.50 mi (6,800.29 km) |
| Potomac to Loviisa | 4,331.88 mi (6,971.48 km) |
| Potomac to Mantsala | 4,299.00 mi (6,918.57 km) |
| Potomac to Mariehamn | 4,156.27 mi (6,688.87 km) |
| Potomac to Masku | 4,206.48 mi (6,769.67 km) |
