| Olonne-sur-Mer to Smolyan | 1,351.19 mi (2,174.53 km) |
| Olonne-sur-Mer to Sofia | 1,257.02 mi (2,022.98 km) |
| Olonne-sur-Mer to Sopot | 1,325.67 mi (2,133.46 km) |
| Olonne-sur-Mer to Sozopol | 1,471.64 mi (2,368.37 km) |
| Olonne-sur-Mer to Sredets | 1,449.55 mi (2,332.83 km) |
| Olonne-sur-Mer to Stamboliyski | 1,328.48 mi (2,137.99 km) |
| Olonne-sur-Mer to Stara Zagora | 1,373.81 mi (2,210.93 km) |
| Olonne-sur-Mer to Svilengrad | 1,417.29 mi (2,280.90 km) |
| Olonne-sur-Mer to Svishtov | 1,331.88 mi (2,143.46 km) |
| Olonne-sur-Mer to Targovishte | 1,398.62 mi (2,250.86 km) |
| Olonne-sur-Mer to Teteven | 1,296.27 mi (2,086.14 km) |
| Olonne-sur-Mer to Troyan | 1,318.44 mi (2,121.83 km) |
| Olonne-sur-Mer to Tryavna | 1,356.06 mi (2,182.36 km) |
| Olonne-sur-Mer to Tutrakan | 1,382.96 mi (2,225.65 km) |
| Olonne-sur-Mer to Varna | 1,462.73 mi (2,354.04 km) |
