| Harpenden to Ratingen | 311.32 mi (501.02 km) |
| Harpenden to Ratzeburg | 481.54 mi (774.96 km) |
| Harpenden to Raubling | 620.27 mi (998.23 km) |
| Harpenden to Rauenberg | 434.53 mi (699.31 km) |
| Harpenden to Raunheim | 402.81 mi (648.26 km) |
| Harpenden to Ravensburg | 523.87 mi (843.08 km) |
| Harpenden to Recke | 344.55 mi (554.51 km) |
| Harpenden to Recklinghausen | 322.03 mi (518.26 km) |
| Harpenden to Regen | 624.75 mi (1,005.44 km) |
| Harpenden to Regensburg | 579.81 mi (933.11 km) |
| Harpenden to Regenstauf | 578.68 mi (931.30 km) |
| Harpenden to Rehau | 547.53 mi (881.17 km) |
| Harpenden to Rehburg-Loccum | 407.50 mi (655.81 km) |
| Harpenden to Rehlingen-Siersburg | 351.55 mi (565.76 km) |
| Harpenden to Reichelsheim | 426.80 mi (686.87 km) |
