| Duncan to Santa Ursula | 4,684.49 mi (7,538.96 km) |
| Duncan to Santander | 4,815.08 mi (7,749.12 km) |
| Duncan to Santany | 5,269.28 mi (8,480.09 km) |
| Duncan to Santiago de Compostela | 4,622.22 mi (7,438.75 km) |
| Duncan to Santiago del Teide | 4,671.48 mi (7,518.01 km) |
| Duncan to Santiponce | 4,915.46 mi (7,910.67 km) |
| Duncan to Santomera | 5,128.07 mi (8,252.83 km) |
| Duncan to Santona | 4,831.05 mi (7,774.83 km) |
| Duncan to Santurce-Antiguo | 4,853.48 mi (7,810.91 km) |
| Duncan to Sarria | 4,676.18 mi (7,525.59 km) |
| Duncan to Sauzal | 4,685.69 mi (7,540.89 km) |
| Duncan to Sedavi | 5,108.77 mi (8,221.77 km) |
| Duncan to Segorbe | 5,088.59 mi (8,189.30 km) |
| Duncan to Segovia | 4,885.69 mi (7,862.76 km) |
| Duncan to Senmanat | 5,140.42 mi (8,272.71 km) |
