| Boise to Smyrna (Delaware) | 2,103.53 mi (3,385.30 km) |
| Boise to Smyrna (Georgia) | 1,823.23 mi (2,934.20 km) |
| Boise to Smyrna (Tennessee) | 1,652.59 mi (2,659.58 km) |
| Boise to Snellville (Georgia) | 1,848.71 mi (2,975.21 km) |
| Boise to Snoqualmie (Washington) | 383.65 mi (617.43 km) |
| Boise to Snyder (Texas) | 1,118.49 mi (1,800.03 km) |
| Boise to Socastee (South Carolina) | 2,101.92 mi (3,382.71 km) |
| Boise to Socorro (Texas) | 988.72 mi (1,591.20 km) |
| Boise to Soddy-Daisy (Tennessee) | 1,742.78 mi (2,804.73 km) |
| Boise to Solana Beach (California) | 734.91 mi (1,182.73 km) |
| Boise to Soledad (California) | 563.37 mi (906.66 km) |
| Boise to Solon (Ohio) | 1,766.06 mi (2,842.19 km) |
| Boise to Somers Point (New Jersey) | 2,152.75 mi (3,464.51 km) |
| Boise to Somerset (Kentucky) | 1,713.55 mi (2,757.69 km) |
| Boise to Somerset (New Jersey) | 2,128.89 mi (3,426.11 km) |
