| Ardahan to Rheinbach | 1,820.03 mi (2,929.06 km) |
| Ardahan to Rheinberg | 1,843.78 mi (2,967.28 km) |
| Ardahan to Rheine | 1,817.50 mi (2,924.98 km) |
| Ardahan to Rheinfelden (Baden) | 1,765.62 mi (2,841.49 km) |
| Ardahan to Ribnitz-Damgarten | 1,654.40 mi (2,662.51 km) |
| Ardahan to Richterich | 1,860.04 mi (2,993.44 km) |
| Ardahan to Riedlingen | 1,689.90 mi (2,719.62 km) |
| Ardahan to Riegelsberg | 1,811.15 mi (2,914.77 km) |
| Ardahan to Rielasingen-Worblingen | 1,717.32 mi (2,763.76 km) |
| Ardahan to Riesa | 1,558.38 mi (2,507.97 km) |
| Ardahan to Rietberg | 1,769.41 mi (2,847.59 km) |
| Ardahan to Rinteln | 1,747.92 mi (2,813.01 km) |
| Ardahan to Ritterhude | 1,776.99 mi (2,859.79 km) |
| Ardahan to Rodenbach | 1,724.62 mi (2,775.51 km) |
| Ardahan to Rodental | 1,637.41 mi (2,635.16 km) |
