| Grenchen to Devnya | 1,016.36 mi (1,635.68 km) |
| Grenchen to Dimitrovgrad | 960.29 mi (1,545.44 km) |
| Grenchen to Dobrich | 1,019.72 mi (1,641.07 km) |
| Grenchen to Dospat | 909.38 mi (1,463.50 km) |
| Grenchen to Dupnitsa | 841.51 mi (1,354.28 km) |
| Grenchen to Elhovo | 1,000.60 mi (1,610.30 km) |
| Grenchen to Etropole | 863.03 mi (1,388.91 km) |
| Grenchen to Gabrovo | 922.95 mi (1,485.35 km) |
| Grenchen to Gorna Oryahovitsa | 932.20 mi (1,500.23 km) |
| Grenchen to Gotse Delchev | 893.13 mi (1,437.35 km) |
| Grenchen to Harmanli | 977.68 mi (1,573.42 km) |
| Grenchen to Haskovo | 962.58 mi (1,549.12 km) |
| Grenchen to Ihtiman | 867.13 mi (1,395.51 km) |
| Grenchen to Isperih | 969.36 mi (1,560.03 km) |
| Grenchen to Kardzhali | 963.03 mi (1,549.84 km) |
