| Duncan to Gonzalez (Florida) | 676.31 mi (1,088.42 km) |
| Duncan to Goodlettsville (Tennessee) | 643.19 mi (1,035.11 km) |
| Duncan to Goodyear (Arizona) | 832.12 mi (1,339.17 km) |
| Duncan to Goose Creek (South Carolina) | 1,033.23 mi (1,662.82 km) |
| Duncan to Goshen (Indiana) | 816.50 mi (1,314.03 km) |
| Duncan to Goulds (Florida) | 1,215.65 mi (1,956.39 km) |
| Duncan to Grafton (Wisconsin) | 808.32 mi (1,300.87 km) |
| Duncan to Graham (North Carolina) | 1,048.67 mi (1,687.67 km) |
| Duncan to Graham (Washington) | 1,528.95 mi (2,460.60 km) |
| Duncan to Grain Valley (Missouri) | 371.24 mi (597.45 km) |
| Duncan to Granbury (Texas) | 144.90 mi (233.19 km) |
| Duncan to Grand Forks (North Dakota) | 925.51 mi (1,489.46 km) |
| Duncan to Grand Haven (Michigan) | 860.48 mi (1,384.81 km) |
| Duncan to Grand Island (Nebraska) | 441.53 mi (710.57 km) |
| Duncan to Grand Junction (Colorado) | 666.80 mi (1,073.11 km) |
