| Mountain Ash to Stannington | 141.53 mi (227.77 km) |
| Mountain Ash to Stansted Mountfitchet | 153.60 mi (247.19 km) |
| Mountain Ash to Stanwell | 125.83 mi (202.50 km) |
| Mountain Ash to Stapleford | 123.85 mi (199.31 km) |
| Mountain Ash to Staveley | 139.07 mi (223.81 km) |
| Mountain Ash to Stepney | 143.50 mi (230.93 km) |
| Mountain Ash to Stevenage | 136.62 mi (219.88 km) |
| Mountain Ash to Stevenston | 279.60 mi (449.97 km) |
| Mountain Ash to Stirling | 307.28 mi (494.52 km) |
| Mountain Ash to Stockport | 130.02 mi (209.25 km) |
| Mountain Ash to Stocksbridge | 145.13 mi (233.56 km) |
| Mountain Ash to Stockton-on-Tees | 217.05 mi (349.31 km) |
| Mountain Ash to Stoke Gifford | 37.44 mi (60.25 km) |
| Mountain Ash to Stoke-on-Trent | 104.15 mi (167.62 km) |
| Mountain Ash to Stone | 98.93 mi (159.21 km) |
