| Niederkassel to Santander | 718.07 mi (1,155.62 km) |
| Niederkassel to Santany | 814.27 mi (1,310.44 km) |
| Niederkassel to Santiago de Compostela | 914.97 mi (1,472.51 km) |
| Niederkassel to Santiago del Teide | 1,990.41 mi (3,203.26 km) |
| Niederkassel to Santiponce | 1,125.71 mi (1,811.65 km) |
| Niederkassel to Santomera | 965.90 mi (1,554.46 km) |
| Niederkassel to Santona | 707.81 mi (1,139.11 km) |
| Niederkassel to Santurce-Antiguo | 700.09 mi (1,126.69 km) |
| Niederkassel to Sarria | 877.78 mi (1,412.65 km) |
| Niederkassel to Sauzal | 1,967.43 mi (3,166.28 km) |
| Niederkassel to Sedavi | 865.01 mi (1,392.10 km) |
| Niederkassel to Segorbe | 840.06 mi (1,351.94 km) |
| Niederkassel to Segovia | 865.54 mi (1,392.96 km) |
| Niederkassel to Senmanat | 677.56 mi (1,090.42 km) |
| Niederkassel to Sesena | 902.63 mi (1,452.64 km) |
