| Portet-sur-Garonne to Smolyan | 1,189.22 mi (1,913.86 km) |
| Portet-sur-Garonne to Sofia | 1,104.10 mi (1,776.88 km) |
| Portet-sur-Garonne to Sopot | 1,175.63 mi (1,891.99 km) |
| Portet-sur-Garonne to Sozopol | 1,325.99 mi (2,133.97 km) |
| Portet-sur-Garonne to Sredets | 1,302.04 mi (2,095.43 km) |
| Portet-sur-Garonne to Stamboliyski | 1,172.05 mi (1,886.24 km) |
| Portet-sur-Garonne to Stara Zagora | 1,223.49 mi (1,969.02 km) |
| Portet-sur-Garonne to Svilengrad | 1,261.22 mi (2,029.74 km) |
| Portet-sur-Garonne to Svishtov | 1,194.49 mi (1,922.35 km) |
| Portet-sur-Garonne to Targovishte | 1,259.52 mi (2,027.00 km) |
| Portet-sur-Garonne to Teteven | 1,148.19 mi (1,847.83 km) |
| Portet-sur-Garonne to Troyan | 1,171.02 mi (1,884.57 km) |
| Portet-sur-Garonne to Tryavna | 1,210.24 mi (1,947.70 km) |
| Portet-sur-Garonne to Tutrakan | 1,253.13 mi (2,016.72 km) |
| Portet-sur-Garonne to Varna | 1,326.05 mi (2,134.07 km) |
