| Duncan to Nocatee (Florida) | 1,010.53 mi (1,626.29 km) |
| Duncan to Nogales (Arizona) | 785.06 mi (1,263.43 km) |
| Duncan to Nolensville (Tennessee) | 641.88 mi (1,033.01 km) |
| Duncan to Norco (California) | 1,120.28 mi (1,802.92 km) |
| Duncan to Norcross (Georgia) | 783.89 mi (1,261.55 km) |
| Duncan to Norfolk (Nebraska) | 518.33 mi (834.16 km) |
| Duncan to Norfolk (Virginia) | 1,223.35 mi (1,968.80 km) |
| Duncan to Normal (Illinois) | 639.97 mi (1,029.93 km) |
| Duncan to Norman (Oklahoma) | 57.88 mi (93.15 km) |
| Duncan to Norridge (Illinois) | 749.50 mi (1,206.21 km) |
| Duncan to Norristown (Pennsylvania) | 1,295.03 mi (2,084.16 km) |
| Duncan to North Adams (Massachusetts) | 1,445.74 mi (2,326.69 km) |
| Duncan to North Amityville (New York) | 1,401.84 mi (2,256.04 km) |
| Duncan to North Arlington (New Jersey) | 1,366.06 mi (2,198.46 km) |
| Duncan to North Auburn (California) | 1,313.92 mi (2,114.56 km) |
