| Box Elder to Smyrna (Delaware) | 1,448.51 mi (2,331.16 km) |
| Box Elder to Smyrna (Georgia) | 1,218.26 mi (1,960.60 km) |
| Box Elder to Smyrna (Tennessee) | 1,037.90 mi (1,670.34 km) |
| Box Elder to Snellville (Georgia) | 1,240.89 mi (1,997.02 km) |
| Box Elder to Snoqualmie (Washington) | 931.09 mi (1,498.44 km) |
| Box Elder to Snyder (Texas) | 796.21 mi (1,281.37 km) |
| Box Elder to Socastee (South Carolina) | 1,473.41 mi (2,371.23 km) |
| Box Elder to Socorro (Texas) | 878.92 mi (1,414.48 km) |
| Box Elder to Soddy-Daisy (Tennessee) | 1,128.03 mi (1,815.38 km) |
| Box Elder to Solana Beach (California) | 1,081.77 mi (1,740.94 km) |
| Box Elder to Soledad (California) | 1,095.28 mi (1,762.69 km) |
| Box Elder to Solon (Ohio) | 1,110.73 mi (1,787.55 km) |
| Box Elder to Somers Point (New Jersey) | 1,497.52 mi (2,410.03 km) |
| Box Elder to Somerset (Kentucky) | 1,080.56 mi (1,739.00 km) |
| Box Elder to Somerset (New Jersey) | 1,473.74 mi (2,371.76 km) |
