| Northampton to Silver Firs (Washington) | 4,705.33 mi (7,572.50 km) |
| Northampton to Silver Spring (Maryland) | 3,613.11 mi (5,814.74 km) |
| Northampton to Silver Springs Shores (Florida) | 4,294.04 mi (6,910.59 km) |
| Northampton to Silverdale (Washington) | 4,730.51 mi (7,613.02 km) |
| Northampton to Silverton (Oregon) | 4,886.15 mi (7,863.50 km) |
| Northampton to Simi Valley (California) | 5,386.63 mi (8,668.94 km) |
| Northampton to Simpsonville (South Carolina) | 4,026.04 mi (6,479.28 km) |
| Northampton to Sioux City (Iowa) | 4,187.78 mi (6,739.58 km) |
| Northampton to Sioux Falls (South Dakota) | 4,148.47 mi (6,676.32 km) |
| Northampton to Skokie (Illinois) | 3,892.40 mi (6,264.21 km) |
| Northampton to Sleepy Hollow (New York) | 3,392.70 mi (5,460.03 km) |
| Northampton to Slidell (Louisiana) | 4,550.61 mi (7,323.50 km) |
| Northampton to Smithfield (North Carolina) | 3,829.58 mi (6,163.12 km) |
| Northampton to Smithfield (Utah) | 4,742.68 mi (7,632.60 km) |
| Northampton to Smithville (Missouri) | 4,275.73 mi (6,881.12 km) |
