| Duncan to North Augusta (South Carolina) | 916.01 mi (1,474.18 km) |
| Duncan to North Aurora (Illinois) | 722.25 mi (1,162.36 km) |
| Duncan to North Babylon (New York) | 1,406.70 mi (2,263.86 km) |
| Duncan to North Bay Shore (New York) | 1,410.29 mi (2,269.64 km) |
| Duncan to North Bellmore (New York) | 1,395.16 mi (2,245.29 km) |
| Duncan to North Bellport (New York) | 1,426.90 mi (2,296.37 km) |
| Duncan to North Bend (Oregon) | 1,532.14 mi (2,465.74 km) |
| Duncan to North Bethesda (Maryland) | 1,189.30 mi (1,913.99 km) |
| Duncan to North Branch (Minnesota) | 801.89 mi (1,290.51 km) |
| Duncan to North Canton (Ohio) | 1,001.47 mi (1,611.71 km) |
| Duncan to North Charleston (South Carolina) | 1,030.57 mi (1,658.55 km) |
| Duncan to North Chicago (Illinois) | 763.99 mi (1,229.53 km) |
| Duncan to North Decatur (Georgia) | 780.34 mi (1,255.83 km) |
| Duncan to North Druid Hills (Georgia) | 778.16 mi (1,252.33 km) |
| Duncan to North Fair Oaks (California) | 1,368.33 mi (2,202.12 km) |
