| Slough to Redondela | 740.58 mi (1,191.84 km) |
| Slough to Reinosa | 610.67 mi (982.78 km) |
| Slough to Requena | 831.03 mi (1,337.41 km) |
| Slough to Reus | 719.87 mi (1,158.52 km) |
| Slough to Rianxo | 723.21 mi (1,163.90 km) |
| Slough to Ribadeo | 627.31 mi (1,009.56 km) |
| Slough to Rincon de la Victoria | 1,037.97 mi (1,670.45 km) |
| Slough to Ripoll | 656.21 mi (1,056.06 km) |
| Slough to Ripollet | 703.81 mi (1,132.67 km) |
| Slough to Rojales | 927.24 mi (1,492.25 km) |
| Slough to Ronda | 1,045.00 mi (1,681.76 km) |
| Slough to Roquetas de Mar | 1,023.57 mi (1,647.27 km) |
| Slough to Rosas | 662.80 mi (1,066.67 km) |
| Slough to Rubi | 702.99 mi (1,131.35 km) |
| Slough to Rute | 997.78 mi (1,605.77 km) |
