| Richterswil to Devnya | 956.22 mi (1,538.89 km) |
| Richterswil to Dimitrovgrad | 901.99 mi (1,451.61 km) |
| Richterswil to Dobrich | 959.28 mi (1,543.80 km) |
| Richterswil to Dospat | 852.47 mi (1,371.92 km) |
| Richterswil to Dupnitsa | 784.36 mi (1,262.31 km) |
| Richterswil to Elhovo | 941.72 mi (1,515.56 km) |
| Richterswil to Etropole | 804.51 mi (1,294.74 km) |
| Richterswil to Gabrovo | 863.81 mi (1,390.17 km) |
| Richterswil to Gorna Oryahovitsa | 872.64 mi (1,404.38 km) |
| Richterswil to Gotse Delchev | 836.67 mi (1,346.49 km) |
| Richterswil to Harmanli | 919.37 mi (1,479.58 km) |
| Richterswil to Haskovo | 904.44 mi (1,455.56 km) |
| Richterswil to Ihtiman | 809.27 mi (1,302.40 km) |
| Richterswil to Isperih | 909.01 mi (1,462.90 km) |
| Richterswil to Kardzhali | 905.36 mi (1,457.04 km) |
