| Solothurn to Devnya | 1,010.27 mi (1,625.87 km) |
| Solothurn to Dimitrovgrad | 954.56 mi (1,536.22 km) |
| Solothurn to Dobrich | 1,013.55 mi (1,631.15 km) |
| Solothurn to Dospat | 903.89 mi (1,454.66 km) |
| Solothurn to Dupnitsa | 835.97 mi (1,345.37 km) |
| Solothurn to Elhovo | 994.76 mi (1,600.92 km) |
| Solothurn to Etropole | 857.26 mi (1,379.62 km) |
| Solothurn to Gabrovo | 917.06 mi (1,475.87 km) |
| Solothurn to Gorna Oryahovitsa | 926.23 mi (1,490.62 km) |
| Solothurn to Gotse Delchev | 887.71 mi (1,428.63 km) |
| Solothurn to Harmanli | 971.95 mi (1,564.20 km) |
| Solothurn to Haskovo | 956.88 mi (1,539.95 km) |
| Solothurn to Ihtiman | 861.47 mi (1,386.41 km) |
| Solothurn to Isperih | 963.21 mi (1,550.14 km) |
| Solothurn to Kardzhali | 957.41 mi (1,540.80 km) |
