| Alpena to Senftenberg | 4,158.40 mi (6,692.29 km) |
| Alpena to Siegburg | 3,942.91 mi (6,345.50 km) |
| Alpena to Siegen | 3,969.59 mi (6,388.43 km) |
| Alpena to Sigmaringen | 4,122.65 mi (6,634.76 km) |
| Alpena to Simbach am Inn | 4,256.72 mi (6,850.53 km) |
| Alpena to Simmerath | 3,917.01 mi (6,303.82 km) |
| Alpena to Sindelfingen | 4,089.80 mi (6,581.90 km) |
| Alpena to Sinsheim | 4,064.28 mi (6,540.83 km) |
| Alpena to Sinzheim | 4,056.52 mi (6,528.34 km) |
| Alpena to Sinzig | 3,954.25 mi (6,363.74 km) |
| Alpena to Soest | 3,947.09 mi (6,352.22 km) |
| Alpena to Solingen | 3,924.88 mi (6,316.49 km) |
| Alpena to Soltau | 3,955.25 mi (6,365.36 km) |
| Alpena to Sommerda | 4,070.66 mi (6,551.10 km) |
| Alpena to Sondershausen | 4,053.72 mi (6,523.83 km) |
