| Tonypandy to Silver Firs (Washington) | 4,669.67 mi (7,515.12 km) |
| Tonypandy to Silver Spring (Maryland) | 3,521.10 mi (5,666.66 km) |
| Tonypandy to Silver Springs Shores (Florida) | 4,195.91 mi (6,752.66 km) |
| Tonypandy to Silverdale (Washington) | 4,695.24 mi (7,556.25 km) |
| Tonypandy to Silverton (Oregon) | 4,847.86 mi (7,801.88 km) |
| Tonypandy to Simi Valley (California) | 5,331.62 mi (8,580.42 km) |
| Tonypandy to Simpsonville (South Carolina) | 3,933.50 mi (6,330.36 km) |
| Tonypandy to Sioux City (Iowa) | 4,117.62 mi (6,626.67 km) |
| Tonypandy to Sioux Falls (South Dakota) | 4,080.05 mi (6,566.21 km) |
| Tonypandy to Skokie (Illinois) | 3,813.49 mi (6,137.22 km) |
| Tonypandy to Sleepy Hollow (New York) | 3,300.81 mi (5,312.14 km) |
| Tonypandy to Slidell (Louisiana) | 4,460.15 mi (7,177.91 km) |
| Tonypandy to Smithfield (North Carolina) | 3,734.67 mi (6,010.37 km) |
| Tonypandy to Smithfield (Utah) | 4,687.89 mi (7,544.43 km) |
| Tonypandy to Smithville (Missouri) | 4,199.81 mi (6,758.94 km) |
