| Guardiagrele to Smolyan | 540.53 mi (869.90 km) |
| Guardiagrele to Sofia | 465.67 mi (749.42 km) |
| Guardiagrele to Sopot | 537.77 mi (865.46 km) |
| Guardiagrele to Sozopol | 688.39 mi (1,107.86 km) |
| Guardiagrele to Sredets | 663.19 mi (1,067.30 km) |
| Guardiagrele to Stamboliyski | 528.03 mi (849.78 km) |
| Guardiagrele to Stara Zagora | 583.91 mi (939.71 km) |
| Guardiagrele to Svilengrad | 615.68 mi (990.84 km) |
| Guardiagrele to Svishtov | 571.41 mi (919.59 km) |
| Guardiagrele to Targovishte | 631.28 mi (1,015.95 km) |
| Guardiagrele to Teteven | 513.56 mi (826.49 km) |
| Guardiagrele to Troyan | 536.25 mi (863.01 km) |
| Guardiagrele to Tryavna | 575.88 mi (926.80 km) |
| Guardiagrele to Tutrakan | 637.59 mi (1,026.10 km) |
| Guardiagrele to Varna | 698.31 mi (1,123.81 km) |
