| Fort Smith to Silver Firs (Washington) | 1,661.86 mi (2,674.51 km) |
| Fort Smith to Silver Spring (Maryland) | 986.16 mi (1,587.07 km) |
| Fort Smith to Silver Springs Shores (Florida) | 839.88 mi (1,351.65 km) |
| Fort Smith to Silverdale (Washington) | 1,680.25 mi (2,704.10 km) |
| Fort Smith to Silverton (Oregon) | 1,630.46 mi (2,623.96 km) |
| Fort Smith to Simi Valley (California) | 1,381.60 mi (2,223.47 km) |
| Fort Smith to Simpsonville (South Carolina) | 686.13 mi (1,104.22 km) |
| Fort Smith to Sioux City (Iowa) | 505.53 mi (813.57 km) |
| Fort Smith to Sioux Falls (South Dakota) | 579.67 mi (932.89 km) |
| Fort Smith to Skokie (Illinois) | 583.76 mi (939.47 km) |
| Fort Smith to Sleepy Hollow (New York) | 1,177.87 mi (1,895.60 km) |
| Fort Smith to Slidell (Louisiana) | 439.41 mi (707.16 km) |
| Fort Smith to Smithfield (North Carolina) | 900.97 mi (1,449.97 km) |
| Fort Smith to Smithfield (Utah) | 1,041.20 mi (1,675.65 km) |
| Fort Smith to Smithville (Missouri) | 279.53 mi (449.86 km) |
