| Echelon to Silver Firs (Washington) | 2,374.65 mi (3,821.64 km) |
| Echelon to Silver Spring (Maryland) | 122.85 mi (197.70 km) |
| Echelon to Silver Springs Shores (Florida) | 841.92 mi (1,354.94 km) |
| Echelon to Silverdale (Washington) | 2,400.44 mi (3,863.13 km) |
| Echelon to Silverton (Oregon) | 2,427.21 mi (3,906.22 km) |
| Echelon to Simi Valley (California) | 2,418.79 mi (3,892.66 km) |
| Echelon to Simpsonville (South Carolina) | 532.98 mi (857.76 km) |
| Echelon to Sioux City (Iowa) | 1,124.53 mi (1,809.76 km) |
| Echelon to Sioux Falls (South Dakota) | 1,146.46 mi (1,845.05 km) |
| Echelon to Skokie (Illinois) | 681.40 mi (1,096.60 km) |
| Echelon to Sleepy Hollow (New York) | 104.36 mi (167.95 km) |
| Echelon to Slidell (Louisiana) | 1,063.11 mi (1,710.91 km) |
| Echelon to Smithfield (North Carolina) | 351.13 mi (565.09 km) |
| Echelon to Smithfield (Utah) | 1,915.29 mi (3,082.36 km) |
| Echelon to Smithville (Missouri) | 1,040.43 mi (1,674.40 km) |
