| Saint-Gregoire to Smolyan | 1,361.41 mi (2,190.98 km) |
| Saint-Gregoire to Sofia | 1,263.71 mi (2,033.74 km) |
| Saint-Gregoire to Sopot | 1,330.13 mi (2,140.64 km) |
| Saint-Gregoire to Sozopol | 1,472.45 mi (2,369.67 km) |
| Saint-Gregoire to Sredets | 1,451.49 mi (2,335.95 km) |
| Saint-Gregoire to Stamboliyski | 1,336.11 mi (2,150.27 km) |
| Saint-Gregoire to Stara Zagora | 1,377.89 mi (2,217.49 km) |
| Saint-Gregoire to Svilengrad | 1,423.83 mi (2,291.43 km) |
| Saint-Gregoire to Svishtov | 1,330.07 mi (2,140.55 km) |
| Saint-Gregoire to Targovishte | 1,396.92 mi (2,248.13 km) |
| Saint-Gregoire to Teteven | 1,300.08 mi (2,092.28 km) |
| Saint-Gregoire to Troyan | 1,321.68 mi (2,127.05 km) |
| Saint-Gregoire to Tryavna | 1,358.09 mi (2,185.63 km) |
| Saint-Gregoire to Tutrakan | 1,376.97 mi (2,216.01 km) |
| Saint-Gregoire to Varna | 1,459.24 mi (2,348.42 km) |
