| Mountain Ash to Superior (Colorado) | 4,560.91 mi (7,340.07 km) |
| Mountain Ash to Superior (Wisconsin) | 3,766.27 mi (6,061.22 km) |
| Mountain Ash to Surprise (Arizona) | 5,150.43 mi (8,288.81 km) |
| Mountain Ash to Susanville (California) | 5,042.46 mi (8,115.05 km) |
| Mountain Ash to Sussex (Wisconsin) | 3,783.11 mi (6,088.33 km) |
| Mountain Ash to Suwanee (Georgia) | 4,042.33 mi (6,505.50 km) |
| Mountain Ash to Swansea (Illinois) | 4,064.41 mi (6,541.03 km) |
| Mountain Ash to Sweetwater (Florida) | 4,295.60 mi (6,913.11 km) |
| Mountain Ash to Sweetwater (Texas) | 4,772.50 mi (7,680.60 km) |
| Mountain Ash to Sycamore (Illinois) | 3,852.58 mi (6,200.13 km) |
| Mountain Ash to Sylacauga (Alabama) | 4,174.50 mi (6,718.21 km) |
| Mountain Ash to Sylvania (Ohio) | 3,672.05 mi (5,909.59 km) |
| Mountain Ash to Syosset (New York) | 3,299.20 mi (5,309.55 km) |
| Mountain Ash to Syracuse (New York) | 3,313.13 mi (5,331.97 km) |
| Mountain Ash to Syracuse (Utah) | 4,735.65 mi (7,621.29 km) |
