| Grottammare to Smolyan | 561.83 mi (904.18 km) |
| Grottammare to Sofia | 479.61 mi (771.86 km) |
| Grottammare to Sopot | 551.72 mi (887.91 km) |
| Grottammare to Sozopol | 702.75 mi (1,130.97 km) |
| Grottammare to Sredets | 678.13 mi (1,091.35 km) |
| Grottammare to Stamboliyski | 545.72 mi (878.25 km) |
| Grottammare to Stara Zagora | 599.00 mi (964.00 km) |
| Grottammare to Svilengrad | 634.59 mi (1,021.28 km) |
| Grottammare to Svishtov | 578.60 mi (931.17 km) |
| Grottammare to Targovishte | 641.01 mi (1,031.61 km) |
| Grottammare to Teteven | 525.66 mi (845.97 km) |
| Grottammare to Troyan | 548.55 mi (882.80 km) |
| Grottammare to Tryavna | 588.17 mi (946.57 km) |
| Grottammare to Tutrakan | 642.38 mi (1,033.81 km) |
| Grottammare to Varna | 708.16 mi (1,139.68 km) |
