| Solothurn to Radauti | 856.81 mi (1,378.90 km) |
| Solothurn to Ramnicu Sarat | 938.22 mi (1,509.93 km) |
| Solothurn to Ramnicu Valcea | 817.44 mi (1,315.54 km) |
| Solothurn to Rasnov | 859.50 mi (1,383.23 km) |
| Solothurn to Reghin | 808.31 mi (1,300.85 km) |
| Solothurn to Resita | 697.40 mi (1,122.36 km) |
| Solothurn to Roman | 910.61 mi (1,465.49 km) |
| Solothurn to Rosiori de Vede | 867.96 mi (1,396.85 km) |
| Solothurn to Rovinari | 764.59 mi (1,230.49 km) |
| Solothurn to Roznov | 892.04 mi (1,435.60 km) |
| Solothurn to Sabaoani | 906.03 mi (1,458.11 km) |
| Solothurn to Sacele | 870.76 mi (1,401.36 km) |
| Solothurn to Sacueni | 681.41 mi (1,096.62 km) |
| Solothurn to Salcea | 878.73 mi (1,414.18 km) |
| Solothurn to Salonta | 664.81 mi (1,069.91 km) |
