| Duncan to Sanford (Maine) | 1,573.75 mi (2,532.70 km) |
| Duncan to Sanford (North Carolina) | 1,061.14 mi (1,707.73 km) |
| Duncan to Sanger (California) | 1,221.68 mi (1,966.11 km) |
| Duncan to Santa Ana (California) | 1,140.98 mi (1,836.23 km) |
| Duncan to Santa Barbara (California) | 1,239.08 mi (1,994.11 km) |
| Duncan to Santa Clara (California) | 1,355.27 mi (2,181.10 km) |
| Duncan to Santa Clara (Oregon) | 1,492.92 mi (2,402.62 km) |
| Duncan to Santa Clarita (California) | 1,169.86 mi (1,882.70 km) |
| Duncan to Santa Cruz (California) | 1,358.73 mi (2,186.67 km) |
| Duncan to Santa Fe (New Mexico) | 462.03 mi (743.57 km) |
| Duncan to Santa Fe (Texas) | 392.45 mi (631.58 km) |
| Duncan to Santa Fe Springs (California) | 1,149.33 mi (1,849.67 km) |
| Duncan to Santa Maria (California) | 1,276.34 mi (2,054.07 km) |
| Duncan to Santa Monica (California) | 1,172.26 mi (1,886.57 km) |
| Duncan to Santa Paula (California) | 1,202.60 mi (1,935.39 km) |
