| Duncan to Los Alamos (New Mexico) | 481.15 mi (774.34 km) |
| Duncan to Los Altos (California) | 1,362.33 mi (2,192.46 km) |
| Duncan to Los Angeles (California) | 1,167.24 mi (1,878.50 km) |
| Duncan to Los Banos (California) | 1,292.91 mi (2,080.73 km) |
| Duncan to Los Gatos (California) | 1,354.49 mi (2,179.85 km) |
| Duncan to Los Lunas (New Mexico) | 503.55 mi (810.39 km) |
| Duncan to Los Osos (California) | 1,295.65 mi (2,085.15 km) |
| Duncan to Loudoun Valley Estates (Virginia) | 1,168.15 mi (1,879.96 km) |
| Duncan to Louisville (Colorado) | 546.02 mi (878.73 km) |
| Duncan to Louisville (Kentucky) | 726.72 mi (1,169.54 km) |
| Duncan to Lovejoy (Georgia) | 782.40 mi (1,259.15 km) |
| Duncan to Loveland (Colorado) | 563.63 mi (907.07 km) |
| Duncan to Loveland (Ohio) | 820.63 mi (1,320.67 km) |
| Duncan to Loves Park (Illinois) | 722.59 mi (1,162.90 km) |
| Duncan to Lovington (New Mexico) | 330.34 mi (531.63 km) |
