| Portogruaro to Smolyan | 659.24 mi (1,060.94 km) |
| Portogruaro to Sofia | 561.00 mi (902.84 km) |
| Portogruaro to Sopot | 627.82 mi (1,010.37 km) |
| Portogruaro to Sozopol | 772.11 mi (1,242.60 km) |
| Portogruaro to Sredets | 750.41 mi (1,207.67 km) |
| Portogruaro to Stamboliyski | 633.42 mi (1,019.40 km) |
| Portogruaro to Stara Zagora | 675.73 mi (1,087.49 km) |
| Portogruaro to Svilengrad | 721.16 mi (1,160.59 km) |
| Portogruaro to Svishtov | 631.95 mi (1,017.02 km) |
| Portogruaro to Targovishte | 698.68 mi (1,124.42 km) |
| Portogruaro to Teteven | 597.96 mi (962.33 km) |
| Portogruaro to Troyan | 619.82 mi (997.50 km) |
| Portogruaro to Tryavna | 656.88 mi (1,057.15 km) |
| Portogruaro to Tutrakan | 684.04 mi (1,100.85 km) |
| Portogruaro to Varna | 762.92 mi (1,227.80 km) |
