| Duncan to Garfield Heights (Ohio) | 1,005.45 mi (1,618.12 km) |
| Duncan to Garland (Texas) | 134.91 mi (217.11 km) |
| Duncan to Garner (North Carolina) | 1,092.11 mi (1,757.58 km) |
| Duncan to Gary (Indiana) | 752.71 mi (1,211.37 km) |
| Duncan to Gastonia (North Carolina) | 948.58 mi (1,526.59 km) |
| Duncan to Gatesville (Texas) | 214.22 mi (344.75 km) |
| Duncan to Gateway (Florida) | 1,106.47 mi (1,780.69 km) |
| Duncan to Gautier (Mississippi) | 610.41 mi (982.36 km) |
| Duncan to Geneva (Illinois) | 726.31 mi (1,168.89 km) |
| Duncan to Geneva (New York) | 1,262.27 mi (2,031.43 km) |
| Duncan to Georgetown (Georgia) | 979.39 mi (1,576.18 km) |
| Duncan to Georgetown (Kentucky) | 785.32 mi (1,263.86 km) |
| Duncan to Georgetown (Texas) | 268.04 mi (431.37 km) |
| Duncan to Germantown (Maryland) | 1,183.08 mi (1,903.98 km) |
| Duncan to Germantown (Tennessee) | 463.10 mi (745.29 km) |
