| Idar-Oberstein to Ramnicu Sarat | 965.03 mi (1,553.07 km) |
| Idar-Oberstein to Ramnicu Valcea | 856.60 mi (1,378.56 km) |
| Idar-Oberstein to Rasnov | 888.64 mi (1,430.12 km) |
| Idar-Oberstein to Reghin | 823.65 mi (1,325.53 km) |
| Idar-Oberstein to Resita | 743.84 mi (1,197.09 km) |
| Idar-Oberstein to Roman | 918.72 mi (1,478.54 km) |
| Idar-Oberstein to Rosiori de Vede | 916.93 mi (1,475.65 km) |
| Idar-Oberstein to Rovinari | 811.07 mi (1,305.29 km) |
| Idar-Oberstein to Roznov | 902.28 mi (1,452.08 km) |
| Idar-Oberstein to Sabaoani | 913.19 mi (1,469.64 km) |
| Idar-Oberstein to Sacele | 898.77 mi (1,446.43 km) |
| Idar-Oberstein to Sacueni | 694.28 mi (1,117.33 km) |
| Idar-Oberstein to Salcea | 878.48 mi (1,413.78 km) |
| Idar-Oberstein to Salonta | 688.29 mi (1,107.70 km) |
| Idar-Oberstein to Sangeorgiu de Mures | 818.60 mi (1,317.41 km) |
