| Duncan to Keizer (Oregon) | 1,507.53 mi (2,426.14 km) |
| Duncan to Keller (Texas) | 118.03 mi (189.95 km) |
| Duncan to Kelso (Washington) | 1,529.65 mi (2,461.73 km) |
| Duncan to Kemp Mill (Maryland) | 1,194.50 mi (1,922.36 km) |
| Duncan to Ken Caryl (Colorado) | 527.28 mi (848.57 km) |
| Duncan to Kendale Lakes (Florida) | 1,208.87 mi (1,945.49 km) |
| Duncan to Kendall (Florida) | 1,213.05 mi (1,952.22 km) |
| Duncan to Kendall Park (New Jersey) | 1,338.89 mi (2,154.73 km) |
| Duncan to Kendall West (Florida) | 1,207.34 mi (1,943.03 km) |
| Duncan to Kenmore (New York) | 1,176.02 mi (1,892.61 km) |
| Duncan to Kenmore (Washington) | 1,549.63 mi (2,493.88 km) |
| Duncan to Kenner (Louisiana) | 546.10 mi (878.87 km) |
| Duncan to Kennesaw (Georgia) | 759.79 mi (1,222.76 km) |
| Duncan to Kennett (Missouri) | 458.61 mi (738.06 km) |
| Duncan to Kennewick (Washington) | 1,371.30 mi (2,206.89 km) |
