| Duncan to Saddlebrooke (Arizona) | 757.76 mi (1,219.50 km) |
| Duncan to Safety Harbor (Florida) | 1,004.48 mi (1,616.55 km) |
| Duncan to Saginaw (Michigan) | 966.97 mi (1,556.19 km) |
| Duncan to Saginaw (Texas) | 120.07 mi (193.23 km) |
| Duncan to Sahuarita (Arizona) | 774.44 mi (1,246.34 km) |
| Duncan to Saks (Alabama) | 692.19 mi (1,113.97 km) |
| Duncan to Salem (Massachusetts) | 1,552.70 mi (2,498.83 km) |
| Duncan to Salem (Ohio) | 1,029.06 mi (1,656.11 km) |
| Duncan to Salem (Oregon) | 1,505.68 mi (2,423.15 km) |
| Duncan to Salem (Virginia) | 1,015.98 mi (1,635.06 km) |
| Duncan to Salem Lakes (Wisconsin) | 763.94 mi (1,229.45 km) |
| Duncan to Salida (California) | 1,307.62 mi (2,104.41 km) |
| Duncan to Salina (Kansas) | 295.71 mi (475.90 km) |
| Duncan to Salinas (California) | 1,336.60 mi (2,151.05 km) |
| Duncan to Salisbury (Maryland) | 1,265.81 mi (2,037.12 km) |
