| Ionia to Smolyan | 5,147.09 mi (8,283.44 km) |
| Ionia to Sofia | 5,043.01 mi (8,115.94 km) |
| Ionia to Sopot | 5,097.44 mi (8,203.54 km) |
| Ionia to Sozopol | 5,215.02 mi (8,392.76 km) |
| Ionia to Sredets | 5,200.49 mi (8,369.38 km) |
| Ionia to Stamboliyski | 5,114.41 mi (8,230.84 km) |
| Ionia to Stara Zagora | 5,140.63 mi (8,273.04 km) |
| Ionia to Svilengrad | 5,193.12 mi (8,357.52 km) |
| Ionia to Svishtov | 5,072.49 mi (8,163.38 km) |
| Ionia to Targovishte | 5,134.29 mi (8,262.85 km) |
| Ionia to Teteven | 5,067.02 mi (8,154.57 km) |
| Ionia to Troyan | 5,085.00 mi (8,183.51 km) |
| Ionia to Tryavna | 5,114.15 mi (8,230.43 km) |
| Ionia to Tutrakan | 5,096.39 mi (8,201.85 km) |
| Ionia to Varna | 5,183.04 mi (8,341.29 km) |
