| Duncan to Largo (Florida) | 1,004.05 mi (1,615.86 km) |
| Duncan to Largo (Maryland) | 1,203.14 mi (1,936.27 km) |
| Duncan to Larkspur (California) | 1,387.19 mi (2,232.47 km) |
| Duncan to Las Cruces (New Mexico) | 533.50 mi (858.58 km) |
| Duncan to Las Vegas (Nevada) | 982.60 mi (1,581.34 km) |
| Duncan to Las Vegas (New Mexico) | 419.10 mi (674.48 km) |
| Duncan to Latham (New York) | 1,415.75 mi (2,278.43 km) |
| Duncan to Lathrop (California) | 1,320.43 mi (2,125.03 km) |
| Duncan to Lauderdale Lakes (Florida) | 1,201.87 mi (1,934.22 km) |
| Duncan to Lauderhill (Florida) | 1,200.99 mi (1,932.81 km) |
| Duncan to Laurel (Florida) | 1,048.28 mi (1,687.04 km) |
| Duncan to Laurel (Maryland) | 1,203.50 mi (1,936.85 km) |
| Duncan to Laurel (Mississippi) | 544.36 mi (876.06 km) |
| Duncan to Laurel (Virginia) | 1,157.36 mi (1,862.58 km) |
| Duncan to Laurinburg (North Carolina) | 1,046.98 mi (1,684.95 km) |
