| Hardenberg to Ratingen | 88.08 mi (141.76 km) |
| Hardenberg to Ratzeburg | 188.34 mi (303.11 km) |
| Hardenberg to Raubling | 409.60 mi (659.19 km) |
| Hardenberg to Rauenberg | 245.36 mi (394.87 km) |
| Hardenberg to Raunheim | 193.16 mi (310.86 km) |
| Hardenberg to Ravensburg | 356.01 mi (572.95 km) |
| Hardenberg to Recke | 48.34 mi (77.80 km) |
| Hardenberg to Recklinghausen | 71.67 mi (115.34 km) |
| Hardenberg to Regen | 377.85 mi (608.08 km) |
| Hardenberg to Regensburg | 342.12 mi (550.58 km) |
| Hardenberg to Regenstauf | 338.07 mi (544.07 km) |
| Hardenberg to Rehau | 282.34 mi (454.39 km) |
| Hardenberg to Rehburg-Loccum | 109.25 mi (175.82 km) |
| Hardenberg to Rehlingen-Siersburg | 220.98 mi (355.64 km) |
| Hardenberg to Reichelsheim | 219.31 mi (352.95 km) |
