| Harrow to Pyrzyce | 650.21 mi (1,046.41 km) |
| Harrow to Pyskowice | 826.65 mi (1,330.36 km) |
| Harrow to Raciborz | 815.12 mi (1,311.81 km) |
| Harrow to Radom | 921.76 mi (1,483.42 km) |
| Harrow to Radomsko | 852.87 mi (1,372.56 km) |
| Harrow to Radzionkow Nowy | 838.09 mi (1,348.78 km) |
| Harrow to Radzymin | 914.24 mi (1,471.32 km) |
| Harrow to Radzyn Podlaski | 980.04 mi (1,577.23 km) |
| Harrow to Rawa Mazowiecka | 879.78 mi (1,415.86 km) |
| Harrow to Rawicz | 736.69 mi (1,185.60 km) |
| Harrow to Reda | 800.75 mi (1,288.68 km) |
| Harrow to Rogozno | 737.70 mi (1,187.22 km) |
| Harrow to Ropczyce | 960.92 mi (1,546.45 km) |
| Harrow to Ruda Slaska | 838.74 mi (1,349.83 km) |
| Harrow to Rumia | 802.29 mi (1,291.16 km) |
