| Grinon to Smolyan | 1,487.19 mi (2,393.41 km) |
| Grinon to Sofia | 1,411.66 mi (2,271.84 km) |
| Grinon to Sopot | 1,483.87 mi (2,388.06 km) |
| Grinon to Sozopol | 1,634.85 mi (2,631.03 km) |
| Grinon to Sredets | 1,609.87 mi (2,590.83 km) |
| Grinon to Stamboliyski | 1,475.22 mi (2,374.14 km) |
| Grinon to Stara Zagora | 1,530.57 mi (2,463.21 km) |
| Grinon to Svilengrad | 1,562.84 mi (2,515.15 km) |
| Grinon to Svishtov | 1,511.54 mi (2,432.59 km) |
| Grinon to Targovishte | 1,574.27 mi (2,533.54 km) |
| Grinon to Teteven | 1,458.51 mi (2,347.24 km) |
| Grinon to Troyan | 1,481.36 mi (2,384.02 km) |
| Grinon to Tryavna | 1,521.03 mi (2,447.86 km) |
| Grinon to Tutrakan | 1,574.11 mi (2,533.28 km) |
| Grinon to Varna | 1,641.41 mi (2,641.60 km) |
