| Llantrisant to Storm Lake (Iowa) | 4,072.37 mi (6,553.85 km) |
| Llantrisant to Storrs (Connecticut) | 3,208.83 mi (5,164.12 km) |
| Llantrisant to Stoughton (Wisconsin) | 3,835.37 mi (6,172.42 km) |
| Llantrisant to Stow (Ohio) | 3,609.17 mi (5,808.39 km) |
| Llantrisant to Streamwood (Illinois) | 3,836.45 mi (6,174.17 km) |
| Llantrisant to Streator (Illinois) | 3,902.78 mi (6,280.91 km) |
| Llantrisant to Streetsboro (Ohio) | 3,602.83 mi (5,798.20 km) |
| Llantrisant to Strongsville (Ohio) | 3,619.02 mi (5,824.25 km) |
| Llantrisant to Stuart (Florida) | 4,220.37 mi (6,792.03 km) |
| Llantrisant to Stuarts Draft (Virginia) | 3,652.82 mi (5,878.64 km) |
| Llantrisant to Sturgis (Michigan) | 3,739.24 mi (6,017.72 km) |
| Llantrisant to Suamico (Wisconsin) | 3,714.76 mi (5,978.33 km) |
| Llantrisant to Sudley (Virginia) | 3,554.93 mi (5,721.11 km) |
| Llantrisant to Suffern (New York) | 3,315.79 mi (5,336.24 km) |
| Llantrisant to Suffolk (Virginia) | 3,613.60 mi (5,815.52 km) |
