| Youngsville to Siloam Springs (Arkansas) | 445.42 mi (716.84 km) |
| Youngsville to Silver Firs (Washington) | 2,010.70 mi (3,235.90 km) |
| Youngsville to Silver Spring (Maryland) | 1,048.88 mi (1,688.01 km) |
| Youngsville to Silver Springs Shores (Florida) | 603.29 mi (970.90 km) |
| Youngsville to Silverdale (Washington) | 2,026.90 mi (3,261.99 km) |
| Youngsville to Silverton (Oregon) | 1,958.05 mi (3,151.17 km) |
| Youngsville to Simi Valley (California) | 1,585.96 mi (2,552.36 km) |
| Youngsville to Simpsonville (South Carolina) | 651.61 mi (1,048.66 km) |
| Youngsville to Sioux City (Iowa) | 890.63 mi (1,433.32 km) |
| Youngsville to Sioux Falls (South Dakota) | 964.60 mi (1,552.38 km) |
| Youngsville to Skokie (Illinois) | 858.21 mi (1,381.16 km) |
| Youngsville to Sleepy Hollow (New York) | 1,266.19 mi (2,037.74 km) |
| Youngsville to Slidell (Louisiana) | 132.88 mi (213.86 km) |
| Youngsville to Smithfield (North Carolina) | 875.39 mi (1,408.80 km) |
| Youngsville to Smithfield (Utah) | 1,368.25 mi (2,201.99 km) |
