| Montlouis-sur-Loire to Smolyan | 1,237.39 mi (1,991.38 km) |
| Montlouis-sur-Loire to Sofia | 1,140.72 mi (1,835.82 km) |
| Montlouis-sur-Loire to Sopot | 1,207.98 mi (1,944.06 km) |
| Montlouis-sur-Loire to Sozopol | 1,351.80 mi (2,175.51 km) |
| Montlouis-sur-Loire to Sredets | 1,330.38 mi (2,141.04 km) |
| Montlouis-sur-Loire to Stamboliyski | 1,212.88 mi (1,951.94 km) |
| Montlouis-sur-Loire to Stara Zagora | 1,255.91 mi (2,021.20 km) |
| Montlouis-sur-Loire to Svilengrad | 1,301.02 mi (2,093.80 km) |
| Montlouis-sur-Loire to Svishtov | 1,210.39 mi (1,947.94 km) |
| Montlouis-sur-Loire to Targovishte | 1,277.25 mi (2,055.54 km) |
| Montlouis-sur-Loire to Teteven | 1,178.14 mi (1,896.04 km) |
| Montlouis-sur-Loire to Troyan | 1,199.98 mi (1,931.17 km) |
| Montlouis-sur-Loire to Tryavna | 1,236.87 mi (1,990.55 km) |
| Montlouis-sur-Loire to Tutrakan | 1,259.21 mi (2,026.50 km) |
| Montlouis-sur-Loire to Varna | 1,340.40 mi (2,157.17 km) |
