| Montgeron to Smolyan | 1,184.55 mi (1,906.35 km) |
| Montgeron to Sofia | 1,084.71 mi (1,745.67 km) |
| Montgeron to Sopot | 1,149.28 mi (1,849.59 km) |
| Montgeron to Sozopol | 1,288.80 mi (2,074.12 km) |
| Montgeron to Sredets | 1,268.59 mi (2,041.60 km) |
| Montgeron to Stamboliyski | 1,157.45 mi (1,862.74 km) |
| Montgeron to Stara Zagora | 1,196.60 mi (1,925.74 km) |
| Montgeron to Svilengrad | 1,244.03 mi (2,002.08 km) |
| Montgeron to Svishtov | 1,145.34 mi (1,843.25 km) |
| Montgeron to Targovishte | 1,212.05 mi (1,950.60 km) |
| Montgeron to Teteven | 1,118.93 mi (1,800.75 km) |
| Montgeron to Troyan | 1,140.07 mi (1,834.76 km) |
| Montgeron to Tryavna | 1,175.56 mi (1,891.88 km) |
| Montgeron to Tutrakan | 1,189.89 mi (1,914.94 km) |
| Montgeron to Varna | 1,273.22 mi (2,049.05 km) |
