| Duncan to Mount Holly (North Carolina) | 958.48 mi (1,542.53 km) |
| Duncan to Mount Juliet (Tennessee) | 652.57 mi (1,050.21 km) |
| Duncan to Mount Kisco (New York) | 1,391.99 mi (2,240.20 km) |
| Duncan to Mount Pleasant (Michigan) | 940.64 mi (1,513.82 km) |
| Duncan to Mount Pleasant (South Carolina) | 1,045.62 mi (1,682.77 km) |
| Duncan to Mount Pleasant (Texas) | 194.28 mi (312.67 km) |
| Duncan to Mount Pleasant (Wisconsin) | 781.29 mi (1,257.36 km) |
| Duncan to Mount Prospect (Illinois) | 749.50 mi (1,206.21 km) |
| Duncan to Mount Sinai (New York) | 1,424.94 mi (2,293.22 km) |
| Duncan to Mount Vernon (Illinois) | 564.01 mi (907.69 km) |
| Duncan to Mount Vernon (New York) | 1,383.00 mi (2,225.72 km) |
| Duncan to Mount Vernon (Ohio) | 936.74 mi (1,507.53 km) |
| Duncan to Mount Vernon (Virginia) | 1,186.90 mi (1,910.14 km) |
| Duncan to Mount Vernon (Washington) | 1,573.78 mi (2,532.75 km) |
| Duncan to Mount Washington (Kentucky) | 729.25 mi (1,173.62 km) |
