| Duncan to University Place (Washington) | 1,545.56 mi (2,487.34 km) |
| Duncan to Upland (California) | 1,124.85 mi (1,810.27 km) |
| Duncan to Upper Arlington (Ohio) | 898.59 mi (1,446.14 km) |
| Duncan to Upper Grand Lagoon (Florida) | 771.75 mi (1,242.02 km) |
| Duncan to Upper Montclair (New Jersey) | 1,363.02 mi (2,193.57 km) |
| Duncan to Urbana (Illinois) | 657.79 mi (1,058.61 km) |
| Duncan to Urbana (Maryland) | 1,180.70 mi (1,900.15 km) |
| Duncan to Urbana (Ohio) | 866.87 mi (1,395.09 km) |
| Duncan to Urbandale (Iowa) | 539.47 mi (868.19 km) |
| Duncan to Utica (New York) | 1,351.38 mi (2,174.83 km) |
| Duncan to Uvalde (Texas) | 383.73 mi (617.55 km) |
| Duncan to Vacaville (California) | 1,358.11 mi (2,185.66 km) |
| Duncan to Vadnais Heights (Minnesota) | 770.42 mi (1,239.87 km) |
| Duncan to Vail (Arizona) | 757.41 mi (1,218.93 km) |
| Duncan to Valdosta (Georgia) | 887.81 mi (1,428.79 km) |
