| Kastamonu to Ratingen | 1,444.38 mi (2,324.50 km) |
| Kastamonu to Ratzeburg | 1,360.05 mi (2,188.79 km) |
| Kastamonu to Raubling | 1,149.91 mi (1,850.61 km) |
| Kastamonu to Rauenberg | 1,326.42 mi (2,134.66 km) |
| Kastamonu to Raunheim | 1,351.27 mi (2,174.67 km) |
| Kastamonu to Ravensburg | 1,262.57 mi (2,031.91 km) |
| Kastamonu to Recke | 1,434.32 mi (2,308.31 km) |
| Kastamonu to Recklinghausen | 1,437.81 mi (2,313.94 km) |
| Kastamonu to Regen | 1,128.99 mi (1,816.93 km) |
| Kastamonu to Regensburg | 1,175.08 mi (1,891.11 km) |
| Kastamonu to Regenstauf | 1,175.52 mi (1,891.82 km) |
| Kastamonu to Rehau | 1,207.49 mi (1,943.26 km) |
| Kastamonu to Rehburg-Loccum | 1,378.59 mi (2,218.63 km) |
| Kastamonu to Rehlingen-Siersburg | 1,416.68 mi (2,279.92 km) |
| Kastamonu to Reichelsheim | 1,328.76 mi (2,138.44 km) |
