| Hillegom to Smolyan | 1,196.16 mi (1,925.04 km) |
| Hillegom to Sofia | 1,092.03 mi (1,757.46 km) |
| Hillegom to Sopot | 1,147.07 mi (1,846.03 km) |
| Hillegom to Sozopol | 1,270.44 mi (2,044.57 km) |
| Hillegom to Sredets | 1,254.09 mi (2,018.26 km) |
| Hillegom to Stamboliyski | 1,163.42 mi (1,872.35 km) |
| Hillegom to Stara Zagora | 1,191.05 mi (1,916.80 km) |
| Hillegom to Svilengrad | 1,242.98 mi (2,000.39 km) |
| Hillegom to Svishtov | 1,126.18 mi (1,812.42 km) |
| Hillegom to Targovishte | 1,190.10 mi (1,915.29 km) |
| Hillegom to Teteven | 1,116.54 mi (1,796.90 km) |
| Hillegom to Troyan | 1,135.00 mi (1,826.60 km) |
| Hillegom to Tryavna | 1,165.44 mi (1,875.60 km) |
| Hillegom to Tutrakan | 1,157.19 mi (1,862.31 km) |
| Hillegom to Varna | 1,243.84 mi (2,001.77 km) |
