| Swansea to Shoreham-by-Sea | 4,210.84 mi (6,776.69 km) |
| Swansea to Shotley Bridge | 4,033.09 mi (6,490.63 km) |
| Swansea to Shrewsbury | 4,059.66 mi (6,533.39 km) |
| Swansea to Sidcup | 4,207.14 mi (6,770.74 km) |
| Swansea to Sidmouth | 4,098.60 mi (6,596.05 km) |
| Swansea to Sileby | 4,121.75 mi (6,633.32 km) |
| Swansea to Sittingbourne | 4,234.38 mi (6,814.58 km) |
| Swansea to Skegness | 4,164.03 mi (6,701.35 km) |
| Swansea to Skelmersdale | 4,035.40 mi (6,494.35 km) |
| Swansea to Skipton | 4,052.40 mi (6,521.71 km) |
| Swansea to Sleaford | 4,140.12 mi (6,662.88 km) |
| Swansea to Slough | 4,177.98 mi (6,723.80 km) |
| Swansea to Small Heath | 4,101.05 mi (6,600.01 km) |
| Swansea to Smethwick | 4,095.81 mi (6,591.57 km) |
| Swansea to Snaresbrook | 4,198.82 mi (6,757.35 km) |
