| Duncan to Germantown (Wisconsin) | 797.95 mi (1,284.18 km) |
| Duncan to Gibsonton (Florida) | 1,027.71 mi (1,653.94 km) |
| Duncan to Gig Harbor (Washington) | 1,551.30 mi (2,496.57 km) |
| Duncan to Gilbert (Arizona) | 796.51 mi (1,281.86 km) |
| Duncan to Gillette (Wyoming) | 784.02 mi (1,261.75 km) |
| Duncan to Gilroy (California) | 1,333.95 mi (2,146.78 km) |
| Duncan to Gladeview (Florida) | 1,212.57 mi (1,951.44 km) |
| Duncan to Gladstone (Missouri) | 372.43 mi (599.38 km) |
| Duncan to Gladstone (Oregon) | 1,497.25 mi (2,409.58 km) |
| Duncan to Glasgow (Delaware) | 1,267.73 mi (2,040.21 km) |
| Duncan to Glasgow (Kentucky) | 693.11 mi (1,115.45 km) |
| Duncan to Glassboro (New Jersey) | 1,302.22 mi (2,095.73 km) |
| Duncan to Glassmanor (Maryland) | 1,194.33 mi (1,922.09 km) |
| Duncan to Glen Allen (Virginia) | 1,158.73 mi (1,864.80 km) |
| Duncan to Glen Burnie (Maryland) | 1,217.65 mi (1,959.62 km) |
