| Duncan to Colton (California) | 1,106.39 mi (1,780.55 km) |
| Duncan to Columbia (Illinois) | 506.11 mi (814.51 km) |
| Duncan to Columbia (Maryland) | 1,204.78 mi (1,938.91 km) |
| Duncan to Columbia (Missouri) | 434.15 mi (698.70 km) |
| Duncan to Columbia (Pennsylvania) | 1,233.92 mi (1,985.81 km) |
| Duncan to Columbia (South Carolina) | 970.94 mi (1,562.58 km) |
| Duncan to Columbia (Tennessee) | 618.99 mi (996.16 km) |
| Duncan to Columbia Heights (Minnesota) | 766.89 mi (1,234.18 km) |
| Duncan to Columbine (Colorado) | 525.90 mi (846.35 km) |
| Duncan to Columbus (Georgia) | 763.76 mi (1,229.15 km) |
| Duncan to Columbus (Indiana) | 736.85 mi (1,185.84 km) |
| Duncan to Columbus (Mississippi) | 549.13 mi (883.73 km) |
| Duncan to Columbus (Nebraska) | 477.44 mi (768.37 km) |
| Duncan to Columbus (Ohio) | 901.84 mi (1,451.37 km) |
| Duncan to Commack (New York) | 1,410.17 mi (2,269.44 km) |
