| Harrow to Sabadell | 702.99 mi (1,131.36 km) |
| Harrow to Sabinanigo | 626.33 mi (1,007.98 km) |
| Harrow to Sagunto | 822.72 mi (1,324.03 km) |
| Harrow to Salamanca | 775.86 mi (1,248.63 km) |
| Harrow to Salobrena | 1,037.37 mi (1,669.48 km) |
| Harrow to Salou | 729.13 mi (1,173.42 km) |
| Harrow to Salt | 680.01 mi (1,094.37 km) |
| Harrow to Salvatierra de Mino | 760.11 mi (1,223.28 km) |
| Harrow to Sama | 623.90 mi (1,004.07 km) |
| Harrow to San Adrian de Besos | 711.91 mi (1,145.72 km) |
| Harrow to San Agustin de Guadalix | 769.37 mi (1,238.19 km) |
| Harrow to San Andres de la Barca | 708.88 mi (1,140.83 km) |
| Harrow to San Andres de Llevaneras | 704.43 mi (1,133.67 km) |
| Harrow to San Andres del Rabanedo | 666.57 mi (1,072.75 km) |
| Harrow to San Bartolome | 1,815.40 mi (2,921.60 km) |
