| Fort Lewis to Silver Firs (Washington) | 56.53 mi (90.98 km) |
| Fort Lewis to Silver Spring (Maryland) | 2,331.67 mi (3,752.46 km) |
| Fort Lewis to Silver Springs Shores (Florida) | 2,492.25 mi (4,010.88 km) |
| Fort Lewis to Silverdale (Washington) | 39.81 mi (64.06 km) |
| Fort Lewis to Silverton (Oregon) | 144.94 mi (233.26 km) |
| Fort Lewis to Simi Valley (California) | 908.41 mi (1,461.94 km) |
| Fort Lewis to Simpsonville (South Carolina) | 2,241.47 mi (3,607.30 km) |
| Fort Lewis to Sioux City (Iowa) | 1,315.48 mi (2,117.06 km) |
| Fort Lewis to Sioux Falls (South Dakota) | 1,272.94 mi (2,048.60 km) |
| Fort Lewis to Skokie (Illinois) | 1,734.57 mi (2,791.53 km) |
| Fort Lewis to Sleepy Hollow (New York) | 2,411.64 mi (3,881.15 km) |
| Fort Lewis to Slidell (Louisiana) | 2,091.55 mi (3,366.02 km) |
| Fort Lewis to Smithfield (North Carolina) | 2,394.05 mi (3,852.85 km) |
| Fort Lewis to Smithfield (Utah) | 641.45 mi (1,032.31 km) |
| Fort Lewis to Smithville (Missouri) | 1,496.22 mi (2,407.93 km) |
