| Boerne to Silver Firs (Washington) | 1,761.20 mi (2,834.38 km) |
| Boerne to Silver Spring (Maryland) | 1,386.96 mi (2,232.10 km) |
| Boerne to Silver Springs Shores (Florida) | 1,005.83 mi (1,618.73 km) |
| Boerne to Silverdale (Washington) | 1,773.17 mi (2,853.64 km) |
| Boerne to Silverton (Oregon) | 1,676.56 mi (2,698.16 km) |
| Boerne to Simi Valley (California) | 1,210.65 mi (1,948.35 km) |
| Boerne to Simpsonville (South Carolina) | 1,019.78 mi (1,641.18 km) |
| Boerne to Sioux City (Iowa) | 887.80 mi (1,428.78 km) |
| Boerne to Sioux Falls (South Dakota) | 956.72 mi (1,539.69 km) |
| Boerne to Skokie (Illinois) | 1,044.32 mi (1,680.67 km) |
| Boerne to Sleepy Hollow (New York) | 1,594.35 mi (2,565.86 km) |
| Boerne to Slidell (Louisiana) | 536.12 mi (862.80 km) |
| Boerne to Smithfield (North Carolina) | 1,247.14 mi (2,007.08 km) |
| Boerne to Smithfield (Utah) | 1,107.19 mi (1,781.84 km) |
| Boerne to Smithville (Missouri) | 704.37 mi (1,133.58 km) |
