| Duncan to Washington (Indiana) | 660.73 mi (1,063.33 km) |
| Duncan to Washington (Missouri) | 472.78 mi (760.87 km) |
| Duncan to Washington (Pennsylvania) | 1,043.51 mi (1,679.37 km) |
| Duncan to Washington (Utah) | 889.01 mi (1,430.72 km) |
| Duncan to Washington Court House (Ohio) | 869.38 mi (1,399.13 km) |
| Duncan to Washougal (Washington) | 1,491.10 mi (2,399.70 km) |
| Duncan to Watauga (Texas) | 121.57 mi (195.65 km) |
| Duncan to Waterbury (Connecticut) | 1,432.08 mi (2,304.70 km) |
| Duncan to Waterloo (Illinois) | 505.03 mi (812.76 km) |
| Duncan to Waterloo (Iowa) | 626.10 mi (1,007.60 km) |
| Duncan to Watertown (New York) | 1,339.89 mi (2,156.34 km) |
| Duncan to Watertown (South Dakota) | 717.55 mi (1,154.79 km) |
| Duncan to Watertown (Wisconsin) | 774.65 mi (1,246.68 km) |
| Duncan to Watertown Town (Massachusetts) | 1,536.95 mi (2,473.48 km) |
| Duncan to Waterville (Maine) | 1,645.72 mi (2,648.53 km) |
