| Duncan to Lewiston (Maine) | 1,613.55 mi (2,596.75 km) |
| Duncan to Lewisville (North Carolina) | 991.35 mi (1,595.43 km) |
| Duncan to Lewisville (Texas) | 116.57 mi (187.60 km) |
| Duncan to Lexington (Kentucky) | 786.95 mi (1,266.47 km) |
| Duncan to Lexington (Nebraska) | 442.32 mi (711.84 km) |
| Duncan to Lexington (North Carolina) | 999.48 mi (1,608.51 km) |
| Duncan to Lexington (South Carolina) | 953.35 mi (1,534.27 km) |
| Duncan to Lexington Park (Maryland) | 1,218.82 mi (1,961.50 km) |
| Duncan to Liberal (Kansas) | 241.62 mi (388.85 km) |
| Duncan to Liberty (Missouri) | 377.88 mi (608.13 km) |
| Duncan to Liberty Lake (Washington) | 1,342.25 mi (2,160.15 km) |
| Duncan to Liberty Triangle (Florida) | 994.87 mi (1,601.08 km) |
| Duncan to Libertyville (Illinois) | 758.50 mi (1,220.68 km) |
| Duncan to Lighthouse Point (Florida) | 1,203.61 mi (1,937.02 km) |
| Duncan to Lilburn (Georgia) | 788.29 mi (1,268.63 km) |
