| Duncan to Sumter (South Carolina) | 1,000.81 mi (1,610.65 km) |
| Duncan to Sun City (Arizona) | 823.60 mi (1,325.45 km) |
| Duncan to Sun City Center (Florida) | 1,032.65 mi (1,661.89 km) |
| Duncan to Sun City West (Arizona) | 827.36 mi (1,331.50 km) |
| Duncan to Sun Lakes (Arizona) | 804.65 mi (1,294.95 km) |
| Duncan to Sun Prairie (Wisconsin) | 757.28 mi (1,218.72 km) |
| Duncan to Sun Valley (Nevada) | 1,251.08 mi (2,013.42 km) |
| Duncan to Sun Village (California) | 1,138.22 mi (1,831.78 km) |
| Duncan to Sunland Park (New Mexico) | 535.45 mi (861.72 km) |
| Duncan to Sunny Isles Beach (Florida) | 1,214.57 mi (1,954.67 km) |
| Duncan to Sunnyside (Washington) | 1,410.26 mi (2,269.60 km) |
| Duncan to Sunnyvale (California) | 1,358.45 mi (2,186.22 km) |
| Duncan to Sunrise (Florida) | 1,197.28 mi (1,926.84 km) |
| Duncan to Sunrise Manor (Nevada) | 970.41 mi (1,561.73 km) |
| Duncan to Sunset (Florida) | 1,211.77 mi (1,950.15 km) |
