| Duncan to Seymour (Tennessee) | 803.67 mi (1,293.38 km) |
| Duncan to Shady Hills (Florida) | 998.81 mi (1,607.43 km) |
| Duncan to Shafter (California) | 1,203.66 mi (1,937.10 km) |
| Duncan to Shaker Heights (Ohio) | 1,009.51 mi (1,624.65 km) |
| Duncan to Shakopee (Minnesota) | 745.24 mi (1,199.35 km) |
| Duncan to Sharon (Pennsylvania) | 1,053.96 mi (1,696.19 km) |
| Duncan to Sharonville (Ohio) | 814.22 mi (1,310.35 km) |
| Duncan to Shasta Lake (California) | 1,398.82 mi (2,251.18 km) |
| Duncan to Shawnee (Kansas) | 353.91 mi (569.57 km) |
| Duncan to Shawnee (Oklahoma) | 78.01 mi (125.55 km) |
| Duncan to Sheboygan (Wisconsin) | 836.64 mi (1,346.45 km) |
| Duncan to Shelby (North Carolina) | 928.21 mi (1,493.82 km) |
| Duncan to Shelbyville (Indiana) | 752.44 mi (1,210.94 km) |
| Duncan to Shelbyville (Kentucky) | 749.37 mi (1,205.99 km) |
| Duncan to Shelbyville (Tennessee) | 652.00 mi (1,049.30 km) |
