| Boston to Sinop | 1,784.31 mi (2,871.57 km) |
| Boston to Siran | 2,025.45 mi (3,259.65 km) |
| Boston to Sirnak | 2,281.49 mi (3,671.71 km) |
| Boston to Sirvan | 2,238.98 mi (3,603.30 km) |
| Boston to Sivas | 1,958.74 mi (3,152.28 km) |
| Boston to Sivasli | 1,727.92 mi (2,780.82 km) |
| Boston to Siverek | 2,143.00 mi (3,448.82 km) |
| Boston to Sivrice | 2,110.73 mi (3,396.89 km) |
| Boston to Sivrihisar | 1,753.45 mi (2,821.90 km) |
| Boston to Sogut | 1,673.78 mi (2,693.70 km) |
| Boston to Sogutlu | 1,645.21 mi (2,647.72 km) |
| Boston to Soke | 1,679.24 mi (2,702.48 km) |
| Boston to Solhan | 2,158.30 mi (3,473.44 km) |
| Boston to Soma | 1,614.67 mi (2,598.55 km) |
| Boston to Sorgun | 1,882.02 mi (3,028.82 km) |
