| Kelso to Silver Firs (Washington) | 125.19 mi (201.47 km) |
| Kelso to Silver Spring (Maryland) | 2,351.56 mi (3,784.47 km) |
| Kelso to Silver Springs Shores (Florida) | 2,490.34 mi (4,007.82 km) |
| Kelso to Silverdale (Washington) | 107.04 mi (172.27 km) |
| Kelso to Silverton (Oregon) | 77.61 mi (124.90 km) |
| Kelso to Simi Valley (California) | 847.60 mi (1,364.08 km) |
| Kelso to Simpsonville (South Carolina) | 2,248.85 mi (3,619.17 km) |
| Kelso to Sioux City (Iowa) | 1,327.51 mi (2,136.42 km) |
| Kelso to Sioux Falls (South Dakota) | 1,288.24 mi (2,073.22 km) |
| Kelso to Skokie (Illinois) | 1,752.72 mi (2,820.73 km) |
| Kelso to Sleepy Hollow (New York) | 2,437.45 mi (3,922.70 km) |
| Kelso to Slidell (Louisiana) | 2,081.84 mi (3,350.39 km) |
| Kelso to Smithfield (North Carolina) | 2,406.59 mi (3,873.04 km) |
| Kelso to Smithfield (Utah) | 624.05 mi (1,004.31 km) |
| Kelso to Smithville (Missouri) | 1,500.61 mi (2,415.00 km) |
