| Monterotondo to Smolyan | 622.53 mi (1,001.87 km) |
| Monterotondo to Sofia | 548.30 mi (882.41 km) |
| Monterotondo to Sopot | 620.41 mi (998.46 km) |
| Monterotondo to Sozopol | 771.03 mi (1,240.85 km) |
| Monterotondo to Sredets | 745.81 mi (1,200.27 km) |
| Monterotondo to Stamboliyski | 610.52 mi (982.54 km) |
| Monterotondo to Stara Zagora | 666.54 mi (1,072.69 km) |
| Monterotondo to Svilengrad | 698.00 mi (1,123.32 km) |
| Monterotondo to Svishtov | 653.52 mi (1,051.73 km) |
| Monterotondo to Targovishte | 713.74 mi (1,148.65 km) |
| Monterotondo to Teteven | 596.15 mi (959.41 km) |
| Monterotondo to Troyan | 618.86 mi (995.95 km) |
| Monterotondo to Tryavna | 658.50 mi (1,059.75 km) |
| Monterotondo to Tutrakan | 719.31 mi (1,157.62 km) |
| Monterotondo to Varna | 780.79 mi (1,256.56 km) |
