| Duncan to Livermore (California) | 1,344.51 mi (2,163.78 km) |
| Duncan to Livingston (California) | 1,287.08 mi (2,071.35 km) |
| Duncan to Livonia (Michigan) | 953.90 mi (1,535.16 km) |
| Duncan to Lochearn (Maryland) | 1,213.14 mi (1,952.37 km) |
| Duncan to Lockhart (Florida) | 1,051.17 mi (1,691.70 km) |
| Duncan to Lockhart (Texas) | 322.43 mi (518.91 km) |
| Duncan to Lockport (Illinois) | 724.92 mi (1,166.65 km) |
| Duncan to Lockport (New York) | 1,189.79 mi (1,914.79 km) |
| Duncan to Lodi (California) | 1,320.54 mi (2,125.21 km) |
| Duncan to Lodi (New Jersey) | 1,369.60 mi (2,204.15 km) |
| Duncan to Logan (Utah) | 903.58 mi (1,454.16 km) |
| Duncan to Logansport (Indiana) | 763.50 mi (1,228.73 km) |
| Duncan to Loganville (Georgia) | 802.46 mi (1,291.43 km) |
| Duncan to Loma Linda (California) | 1,102.16 mi (1,773.76 km) |
| Duncan to Lombard (Illinois) | 737.94 mi (1,187.60 km) |
