| Southend to Sabadell | 694.20 mi (1,117.20 km) |
| Southend to Sabinanigo | 626.04 mi (1,007.51 km) |
| Southend to Sagunto | 821.74 mi (1,322.46 km) |
| Southend to Salamanca | 791.47 mi (1,273.75 km) |
| Southend to Salobrena | 1,044.29 mi (1,680.62 km) |
| Southend to Salou | 723.71 mi (1,164.70 km) |
| Southend to Salt | 668.69 mi (1,076.15 km) |
| Southend to Salvatierra de Mino | 784.44 mi (1,262.43 km) |
| Southend to Sama | 643.03 mi (1,034.85 km) |
| Southend to San Adrian de Besos | 702.82 mi (1,131.08 km) |
| Southend to San Agustin de Guadalix | 778.86 mi (1,253.45 km) |
| Southend to San Andres de la Barca | 700.56 mi (1,127.44 km) |
| Southend to San Andres de Llevaneras | 694.39 mi (1,117.52 km) |
| Southend to San Andres del Rabanedo | 684.30 mi (1,101.27 km) |
| Southend to San Bartolome | 1,837.89 mi (2,957.79 km) |
