| Letterkenny to Senftenberg | 925.59 mi (1,489.60 km) |
| Letterkenny to Siegburg | 683.57 mi (1,100.10 km) |
| Letterkenny to Siegen | 711.43 mi (1,144.94 km) |
| Letterkenny to Sigmaringen | 865.71 mi (1,393.23 km) |
| Letterkenny to Simbach am Inn | 997.39 mi (1,605.15 km) |
| Letterkenny to Simmerath | 657.15 mi (1,057.58 km) |
| Letterkenny to Sindelfingen | 831.06 mi (1,337.47 km) |
| Letterkenny to Sinsheim | 804.61 mi (1,294.89 km) |
| Letterkenny to Sinzheim | 798.96 mi (1,285.81 km) |
| Letterkenny to Sinzig | 694.51 mi (1,117.71 km) |
| Letterkenny to Soest | 692.91 mi (1,115.14 km) |
| Letterkenny to Solingen | 666.47 mi (1,072.58 km) |
| Letterkenny to Soltau | 724.29 mi (1,165.63 km) |
| Letterkenny to Sommerda | 821.98 mi (1,322.86 km) |
| Letterkenny to Sondershausen | 806.12 mi (1,297.32 km) |
