| Potomac to Lovington (New Mexico) | 1,515.08 mi (2,438.28 km) |
| Potomac to Lowell (Indiana) | 562.06 mi (904.55 km) |
| Potomac to Lowell (Massachusetts) | 396.05 mi (637.38 km) |
| Potomac to Lower Burrell (Pennsylvania) | 172.11 mi (276.98 km) |
| Potomac to Lowes Island (Virginia) | 8.79 mi (14.14 km) |
| Potomac to Lubbock (Texas) | 1,420.86 mi (2,286.66 km) |
| Potomac to Lufkin (Texas) | 1,121.15 mi (1,804.32 km) |
| Potomac to Luling (Louisiana) | 977.12 mi (1,572.52 km) |
| Potomac to Lumberton (North Carolina) | 319.17 mi (513.66 km) |
| Potomac to Lumberton (Texas) | 1,137.93 mi (1,831.32 km) |
| Potomac to Lutz (Florida) | 809.50 mi (1,302.77 km) |
| Potomac to Lynbrook (New York) | 218.56 mi (351.73 km) |
| Potomac to Lynchburg (Virginia) | 155.50 mi (250.26 km) |
| Potomac to Lynden (Washington) | 2,314.48 mi (3,724.79 km) |
| Potomac to Lyndhurst (Ohio) | 284.99 mi (458.65 km) |
