| Cities | Distance |
|---|---|
| Solothurn to Popovo | 944.89 mi (1,520.66 km) |
| Solothurn to Provadia | 1,004.98 mi (1,617.36 km) |
| Solothurn to Radnevo | 961.71 mi (1,547.72 km) |
| Solothurn to Radomir | 818.92 mi (1,317.92 km) |
| Solothurn to Rakitovo | 888.58 mi (1,430.04 km) |
| Solothurn to Rakovski | 918.14 mi (1,477.60 km) |
| Solothurn to Razgrad | 953.18 mi (1,533.99 km) |
| Solothurn to Razlog | 864.64 mi (1,391.50 km) |
| Solothurn to Ruse | 919.65 mi (1,480.04 km) |
| Solothurn to Samokov | 853.06 mi (1,372.87 km) |
| Solothurn to Sandanski | 867.84 mi (1,396.65 km) |
| Solothurn to Sevlievo | 902.34 mi (1,452.17 km) |
| Solothurn to Shumen | 979.10 mi (1,575.72 km) |
| Solothurn to Silistra | 973.47 mi (1,566.64 km) |
| Solothurn to Sliven | 968.33 mi (1,558.38 km) |