| Portogruaro to Karlovo | 630.65 mi (1,014.93 km) |
| Portogruaro to Karnobat | 732.67 mi (1,179.12 km) |
| Portogruaro to Kavarna | 778.20 mi (1,252.39 km) |
| Portogruaro to Kazanlak | 658.95 mi (1,060.47 km) |
| Portogruaro to Knezha | 574.56 mi (924.67 km) |
| Portogruaro to Kostinbrod | 552.33 mi (888.89 km) |
| Portogruaro to Kozloduy | 551.63 mi (887.76 km) |
| Portogruaro to Kyustendil | 545.26 mi (877.52 km) |
| Portogruaro to Levski | 627.26 mi (1,009.47 km) |
| Portogruaro to Lom | 527.24 mi (848.51 km) |
| Portogruaro to Lovech | 613.28 mi (986.98 km) |
| Portogruaro to Lukovit | 585.82 mi (942.79 km) |
| Portogruaro to Lyaskovets | 661.18 mi (1,064.07 km) |
| Portogruaro to Mezdra | 565.33 mi (909.80 km) |
| Portogruaro to Momchilgrad | 693.14 mi (1,115.50 km) |
