| Ardahan to Ratingen | 1,830.62 mi (2,946.09 km) |
| Ardahan to Ratzeburg | 1,707.83 mi (2,748.49 km) |
| Ardahan to Raubling | 1,566.40 mi (2,520.88 km) |
| Ardahan to Rauenberg | 1,731.72 mi (2,786.93 km) |
| Ardahan to Raunheim | 1,749.00 mi (2,814.75 km) |
| Ardahan to Ravensburg | 1,681.74 mi (2,706.50 km) |
| Ardahan to Recke | 1,806.83 mi (2,907.82 km) |
| Ardahan to Recklinghausen | 1,820.38 mi (2,929.62 km) |
| Ardahan to Regen | 1,530.45 mi (2,463.02 km) |
| Ardahan to Regensburg | 1,578.00 mi (2,539.55 km) |
| Ardahan to Regenstauf | 1,577.12 mi (2,538.12 km) |
| Ardahan to Rehau | 1,595.78 mi (2,568.16 km) |
| Ardahan to Rehburg-Loccum | 1,746.71 mi (2,811.07 km) |
| Ardahan to Rehlingen-Siersburg | 1,823.17 mi (2,934.11 km) |
| Ardahan to Reichelsheim | 1,729.17 mi (2,782.83 km) |
