| Mountain Ash to Shotley Bridge | 229.06 mi (368.64 km) |
| Mountain Ash to Shrewsbury | 75.71 mi (121.85 km) |
| Mountain Ash to Sidcup | 150.59 mi (242.35 km) |
| Mountain Ash to Sidmouth | 69.46 mi (111.78 km) |
| Mountain Ash to Sileby | 120.50 mi (193.93 km) |
| Mountain Ash to Sittingbourne | 178.67 mi (287.54 km) |
| Mountain Ash to Skegness | 186.55 mi (300.22 km) |
| Mountain Ash to Skelmersdale | 131.56 mi (211.73 km) |
| Mountain Ash to Skipton | 167.56 mi (269.66 km) |
| Mountain Ash to Sleaford | 154.67 mi (248.92 km) |
| Mountain Ash to Slough | 120.39 mi (193.74 km) |
| Mountain Ash to Small Heath | 84.32 mi (135.70 km) |
| Mountain Ash to Smethwick | 82.04 mi (132.04 km) |
| Mountain Ash to Snaresbrook | 145.68 mi (234.44 km) |
| Mountain Ash to Snodland | 166.32 mi (267.67 km) |
