| Duncan to Lindsay (California) | 1,195.73 mi (1,924.34 km) |
| Duncan to Linganore (Maryland) | 1,183.87 mi (1,905.25 km) |
| Duncan to Lino Lakes (Minnesota) | 777.43 mi (1,251.16 km) |
| Duncan to Linthicum (Maryland) | 1,215.26 mi (1,955.77 km) |
| Duncan to Linton Hall (Virginia) | 1,162.17 mi (1,870.33 km) |
| Duncan to Lisle (Illinois) | 731.40 mi (1,177.07 km) |
| Duncan to Lithia Springs (Georgia) | 760.10 mi (1,223.26 km) |
| Duncan to Little Canada (Minnesota) | 768.12 mi (1,236.17 km) |
| Duncan to Little Chute (Wisconsin) | 845.14 mi (1,360.12 km) |
| Duncan to Little Elm (Texas) | 109.56 mi (176.32 km) |
| Duncan to Little Ferry (New Jersey) | 1,371.37 mi (2,207.00 km) |
| Duncan to Little Rock (Arkansas) | 316.52 mi (509.39 km) |
| Duncan to Littleton (Colorado) | 523.97 mi (843.25 km) |
| Duncan to Live Oak (California) | 1,355.74 mi (2,181.86 km) |
| Duncan to Live Oak (Texas) | 345.39 mi (555.85 km) |
