| Harrow to Redondela | 750.70 mi (1,208.13 km) |
| Harrow to Reinosa | 618.77 mi (995.81 km) |
| Harrow to Requena | 836.64 mi (1,346.45 km) |
| Harrow to Reus | 723.85 mi (1,164.92 km) |
| Harrow to Rianxo | 733.49 mi (1,180.45 km) |
| Harrow to Ribadeo | 637.16 mi (1,025.42 km) |
| Harrow to Rincon de la Victoria | 1,045.18 mi (1,682.06 km) |
| Harrow to Ripoll | 659.13 mi (1,060.77 km) |
| Harrow to Ripollet | 706.90 mi (1,137.64 km) |
| Harrow to Rojales | 932.59 mi (1,500.86 km) |
| Harrow to Ronda | 1,052.63 mi (1,694.05 km) |
| Harrow to Roquetas de Mar | 1,029.94 mi (1,657.53 km) |
| Harrow to Rosas | 664.86 mi (1,069.99 km) |
| Harrow to Rubi | 706.18 mi (1,136.48 km) |
| Harrow to Rute | 1,005.10 mi (1,617.54 km) |
