| Niederkassel to Sestao | 700.33 mi (1,127.07 km) |
| Niederkassel to Sevilla | 1,135.86 mi (1,827.99 km) |
| Niederkassel to Sevilla La Nueva | 897.57 mi (1,444.51 km) |
| Niederkassel to Silla | 869.70 mi (1,399.65 km) |
| Niederkassel to Silleda | 911.72 mi (1,467.26 km) |
| Niederkassel to Sitges | 707.58 mi (1,138.75 km) |
| Niederkassel to Socuellamos | 927.69 mi (1,492.97 km) |
| Niederkassel to Soller | 791.64 mi (1,274.02 km) |
| Niederkassel to Solsona | 663.33 mi (1,067.52 km) |
| Niederkassel to Son Servera | 793.69 mi (1,277.32 km) |
| Niederkassel to Sonseca | 933.40 mi (1,502.16 km) |
| Niederkassel to Sopelana | 695.70 mi (1,119.62 km) |
| Niederkassel to Soria | 771.12 mi (1,241.00 km) |
| Niederkassel to Suances | 727.73 mi (1,171.17 km) |
| Niederkassel to Sueca | 877.95 mi (1,412.92 km) |
