| Syke to Smolyan | 1,075.63 mi (1,731.06 km) |
| Syke to Sofia | 971.60 mi (1,563.63 km) |
| Syke to Sopot | 1,020.12 mi (1,641.72 km) |
| Syke to Sozopol | 1,132.88 mi (1,823.19 km) |
| Syke to Sredets | 1,118.72 mi (1,800.40 km) |
| Syke to Stamboliyski | 1,040.52 mi (1,674.56 km) |
| Syke to Stara Zagora | 1,061.41 mi (1,708.18 km) |
| Syke to Svilengrad | 1,114.70 mi (1,793.94 km) |
| Syke to Svishtov | 990.88 mi (1,594.67 km) |
| Syke to Targovishte | 1,052.16 mi (1,693.29 km) |
| Syke to Teteven | 990.19 mi (1,593.56 km) |
| Syke to Troyan | 1,006.80 mi (1,620.29 km) |
| Syke to Tryavna | 1,033.96 mi (1,663.99 km) |
| Syke to Tutrakan | 1,014.62 mi (1,632.87 km) |
| Syke to Varna | 1,101.39 mi (1,772.52 km) |
