| Blue Island to Smolyan | 5,306.31 mi (8,539.68 km) |
| Blue Island to Sofia | 5,202.19 mi (8,372.11 km) |
| Blue Island to Sopot | 5,256.27 mi (8,459.15 km) |
| Blue Island to Sozopol | 5,373.07 mi (8,647.13 km) |
| Blue Island to Sredets | 5,358.73 mi (8,624.04 km) |
| Blue Island to Stamboliyski | 5,273.48 mi (8,486.85 km) |
| Blue Island to Stara Zagora | 5,299.29 mi (8,528.38 km) |
| Blue Island to Svilengrad | 5,351.88 mi (8,613.01 km) |
| Blue Island to Svishtov | 5,230.77 mi (8,418.10 km) |
| Blue Island to Targovishte | 5,292.35 mi (8,517.22 km) |
| Blue Island to Teteven | 5,225.87 mi (8,410.23 km) |
| Blue Island to Troyan | 5,243.75 mi (8,438.99 km) |
| Blue Island to Tryavna | 5,272.69 mi (8,485.57 km) |
| Blue Island to Tutrakan | 5,254.10 mi (8,455.66 km) |
| Blue Island to Varna | 5,340.69 mi (8,595.01 km) |
