| Duncan to Worthington (Ohio) | 902.67 mi (1,452.71 km) |
| Duncan to Wright (Florida) | 715.12 mi (1,150.87 km) |
| Duncan to Wyandanch (New York) | 1,404.92 mi (2,261.01 km) |
| Duncan to Wyandotte (Michigan) | 957.30 mi (1,540.63 km) |
| Duncan to Wylie (Texas) | 131.60 mi (211.79 km) |
| Duncan to Wyndham (Virginia) | 1,151.88 mi (1,853.76 km) |
| Duncan to Wyoming (Michigan) | 873.84 mi (1,406.31 km) |
| Duncan to Wyomissing (Pennsylvania) | 1,265.07 mi (2,035.93 km) |
| Duncan to Xenia (Ohio) | 847.01 mi (1,363.13 km) |
| Duncan to Yakima (Washington) | 1,442.03 mi (2,320.72 km) |
| Duncan to Yankton (South Dakota) | 577.58 mi (929.53 km) |
| Duncan to Yauco (Puerto Rico) | 2,222.59 mi (3,576.91 km) |
| Duncan to Yazoo City (Mississippi) | 447.10 mi (719.53 km) |
| Duncan to Yeadon (Pennsylvania) | 1,297.34 mi (2,087.86 km) |
| Duncan to Yelm (Washington) | 1,540.87 mi (2,479.80 km) |
