| Duncan to Land O' Lakes (Florida) | 1,010.72 mi (1,626.59 km) |
| Duncan to Landover (Maryland) | 1,200.45 mi (1,931.93 km) |
| Duncan to Langley Park (Maryland) | 1,196.13 mi (1,924.99 km) |
| Duncan to Lanham (Maryland) | 1,203.23 mi (1,936.41 km) |
| Duncan to Lansdale (Pennsylvania) | 1,299.55 mi (2,091.42 km) |
| Duncan to Lansdowne (Pennsylvania) | 1,296.21 mi (2,086.06 km) |
| Duncan to Lansdowne (Virginia) | 1,170.45 mi (1,883.66 km) |
| Duncan to Lansing (Illinois) | 743.44 mi (1,196.46 km) |
| Duncan to Lansing (Kansas) | 365.28 mi (587.86 km) |
| Duncan to Lansing (Michigan) | 914.09 mi (1,471.09 km) |
| Duncan to Lantana (Florida) | 1,194.11 mi (1,921.73 km) |
| Duncan to Lantana (Texas) | 110.10 mi (177.18 km) |
| Duncan to Laplace (Louisiana) | 532.97 mi (857.74 km) |
| Duncan to Laramie (Wyoming) | 627.37 mi (1,009.65 km) |
| Duncan to Laredo (Texas) | 490.96 mi (790.12 km) |
