| Boskoop to Smolyan | 1,186.25 mi (1,909.08 km) |
| Boskoop to Sofia | 1,082.18 mi (1,741.61 km) |
| Boskoop to Sopot | 1,137.72 mi (1,830.98 km) |
| Boskoop to Sozopol | 1,261.99 mi (2,030.97 km) |
| Boskoop to Sredets | 1,245.44 mi (2,004.34 km) |
| Boskoop to Stamboliyski | 1,153.72 mi (1,856.74 km) |
| Boskoop to Stara Zagora | 1,181.90 mi (1,902.09 km) |
| Boskoop to Svilengrad | 1,233.68 mi (1,985.42 km) |
| Boskoop to Svishtov | 1,117.61 mi (1,798.62 km) |
| Boskoop to Targovishte | 1,181.75 mi (1,901.84 km) |
| Boskoop to Teteven | 1,107.16 mi (1,781.80 km) |
| Boskoop to Troyan | 1,125.77 mi (1,811.74 km) |
| Boskoop to Tryavna | 1,156.49 mi (1,861.18 km) |
| Boskoop to Tutrakan | 1,149.33 mi (1,849.66 km) |
| Boskoop to Varna | 1,235.91 mi (1,989.01 km) |
