| Alpena to Smyrna (Delaware) | 565.43 mi (909.97 km) |
| Alpena to Smyrna (Georgia) | 776.69 mi (1,249.96 km) |
| Alpena to Smyrna (Tennessee) | 649.52 mi (1,045.31 km) |
| Alpena to Snellville (Georgia) | 775.65 mi (1,248.29 km) |
| Alpena to Snoqualmie (Washington) | 1,822.07 mi (2,932.34 km) |
| Alpena to Snyder (Texas) | 1,264.63 mi (2,035.22 km) |
| Alpena to Socastee (South Carolina) | 821.24 mi (1,321.66 km) |
| Alpena to Socorro (Texas) | 1,537.00 mi (2,473.56 km) |
| Alpena to Soddy-Daisy (Tennessee) | 684.38 mi (1,101.41 km) |
| Alpena to Solana Beach (California) | 1,978.82 mi (3,184.60 km) |
| Alpena to Soledad (California) | 2,050.40 mi (3,299.79 km) |
| Alpena to Solon (Ohio) | 273.93 mi (440.85 km) |
| Alpena to Somers Point (New Jersey) | 601.60 mi (968.18 km) |
| Alpena to Somerset (Kentucky) | 555.44 mi (893.89 km) |
| Alpena to Somerset (New Jersey) | 551.69 mi (887.86 km) |
