| Duncan to Myrtle Grove (North Carolina) | 1,141.79 mi (1,837.53 km) |
| Duncan to Nacogdoches (Texas) | 276.95 mi (445.71 km) |
| Duncan to Nampa (Idaho) | 1,175.15 mi (1,891.22 km) |
| Duncan to Nanakuli (Hawaii) | 3,731.51 mi (6,005.28 km) |
| Duncan to Nanticoke (Pennsylvania) | 1,276.76 mi (2,054.74 km) |
| Duncan to Nanuet (New York) | 1,375.89 mi (2,214.27 km) |
| Duncan to Napa (California) | 1,375.90 mi (2,214.29 km) |
| Duncan to Naperville (Illinois) | 726.41 mi (1,169.04 km) |
| Duncan to Naples (Florida) | 1,120.69 mi (1,803.57 km) |
| Duncan to Naranja (Florida) | 1,215.68 mi (1,956.44 km) |
| Duncan to Nashua (New Hampshire) | 1,526.95 mi (2,457.39 km) |
| Duncan to Nashville (Tennessee) | 637.25 mi (1,025.55 km) |
| Duncan to Natchez (Mississippi) | 431.29 mi (694.10 km) |
| Duncan to Natchitoches (Louisiana) | 339.89 mi (547.00 km) |
| Duncan to National City (California) | 1,109.46 mi (1,785.50 km) |
