| Niederkassel to Serik | 1,524.04 mi (2,452.71 km) |
| Niederkassel to Serinhisar | 1,421.76 mi (2,288.11 km) |
| Niederkassel to Serinyol | 1,750.13 mi (2,816.57 km) |
| Niederkassel to Seydisehir | 1,527.87 mi (2,458.87 km) |
| Niederkassel to Seyhan | 1,685.97 mi (2,713.30 km) |
| Niederkassel to Seyitgazi | 1,385.74 mi (2,230.13 km) |
| Niederkassel to Siirt | 1,916.39 mi (3,084.13 km) |
| Niederkassel to Sile | 1,264.39 mi (2,034.85 km) |
| Niederkassel to Silifke | 1,659.95 mi (2,671.43 km) |
| Niederkassel to Silivri | 1,214.62 mi (1,954.75 km) |
| Niederkassel to Silopi | 1,968.25 mi (3,167.59 km) |
| Niederkassel to Simav | 1,336.46 mi (2,150.82 km) |
| Niederkassel to Sinanpasa | 1,401.29 mi (2,255.15 km) |
| Niederkassel to Sindirgi | 1,298.08 mi (2,089.06 km) |
| Niederkassel to Sinop | 1,458.83 mi (2,347.77 km) |
