| Duncan to Lynn (Massachusetts) | 1,549.00 mi (2,492.88 km) |
| Duncan to Lynn Haven (Florida) | 775.36 mi (1,247.82 km) |
| Duncan to Lynnwood (Washington) | 1,554.30 mi (2,501.40 km) |
| Duncan to Lynwood (California) | 1,157.32 mi (1,862.52 km) |
| Duncan to Lyons (Illinois) | 742.98 mi (1,195.71 km) |
| Duncan to Mableton (Georgia) | 764.54 mi (1,230.41 km) |
| Duncan to Macedonia (Ohio) | 1,007.68 mi (1,621.70 km) |
| Duncan to Machesney Park (Illinois) | 723.03 mi (1,163.61 km) |
| Duncan to Mack (Ohio) | 797.40 mi (1,283.30 km) |
| Duncan to Macomb (Illinois) | 570.02 mi (917.36 km) |
| Duncan to Macon (Georgia) | 825.90 mi (1,329.17 km) |
| Duncan to Madera (California) | 1,250.71 mi (2,012.83 km) |
| Duncan to Madison (Alabama) | 634.23 mi (1,020.69 km) |
| Duncan to Madison (Indiana) | 752.09 mi (1,210.38 km) |
| Duncan to Madison (Mississippi) | 470.89 mi (757.83 km) |
