| Duncan to Gages Lake (Illinois) | 760.88 mi (1,224.52 km) |
| Duncan to Gahanna (Ohio) | 908.81 mi (1,462.59 km) |
| Duncan to Gainesville (Florida) | 970.12 mi (1,561.26 km) |
| Duncan to Gainesville (Georgia) | 802.78 mi (1,291.94 km) |
| Duncan to Gainesville (Texas) | 76.40 mi (122.96 km) |
| Duncan to Gainesville (Virginia) | 1,159.36 mi (1,865.82 km) |
| Duncan to Gaithersburg (Maryland) | 1,185.33 mi (1,907.61 km) |
| Duncan to Galena Park (Texas) | 366.73 mi (590.19 km) |
| Duncan to Galesburg (Illinois) | 604.55 mi (972.93 km) |
| Duncan to Galion (Ohio) | 930.80 mi (1,497.97 km) |
| Duncan to Gallatin (Tennessee) | 656.44 mi (1,056.44 km) |
| Duncan to Gallup (New Mexico) | 615.66 mi (990.80 km) |
| Duncan to Galt (California) | 1,321.62 mi (2,126.94 km) |
| Duncan to Galveston (Texas) | 406.52 mi (654.24 km) |
| Duncan to Gantt (South Carolina) | 881.22 mi (1,418.19 km) |
