| Boston to Smyrna (Delaware) | 3,562.94 mi (5,734.00 km) |
| Boston to Smyrna (Georgia) | 4,178.32 mi (6,724.36 km) |
| Boston to Smyrna (Tennessee) | 4,151.89 mi (6,681.82 km) |
| Boston to Snellville (Georgia) | 4,158.38 mi (6,692.27 km) |
| Boston to Snoqualmie (Washington) | 4,698.75 mi (7,561.91 km) |
| Boston to Snyder (Texas) | 4,862.95 mi (7,826.17 km) |
| Boston to Socastee (South Carolina) | 3,967.07 mi (6,384.38 km) |
| Boston to Socorro (Texas) | 5,113.80 mi (8,229.87 km) |
| Boston to Soddy-Daisy (Tennessee) | 4,134.60 mi (6,654.00 km) |
| Boston to Solana Beach (California) | 5,406.69 mi (8,701.22 km) |
| Boston to Soledad (California) | 5,330.43 mi (8,578.49 km) |
| Boston to Solon (Ohio) | 3,694.44 mi (5,945.63 km) |
| Boston to Somers Point (New Jersey) | 3,521.93 mi (5,667.99 km) |
| Boston to Somerset (Kentucky) | 4,022.47 mi (6,473.53 km) |
| Boston to Somerset (New Jersey) | 3,463.41 mi (5,573.83 km) |
