| Heiloo to Smolyan | 1,202.51 mi (1,935.26 km) |
| Heiloo to Sofia | 1,098.29 mi (1,767.53 km) |
| Heiloo to Sopot | 1,152.39 mi (1,854.59 km) |
| Heiloo to Sozopol | 1,274.12 mi (2,050.49 km) |
| Heiloo to Sredets | 1,258.13 mi (2,024.77 km) |
| Heiloo to Stamboliyski | 1,169.39 mi (1,881.95 km) |
| Heiloo to Stara Zagora | 1,195.98 mi (1,924.75 km) |
| Heiloo to Svilengrad | 1,248.18 mi (2,008.76 km) |
| Heiloo to Svishtov | 1,130.13 mi (1,818.76 km) |
| Heiloo to Targovishte | 1,193.65 mi (1,921.00 km) |
| Heiloo to Teteven | 1,121.93 mi (1,805.56 km) |
| Heiloo to Troyan | 1,140.11 mi (1,834.83 km) |
| Heiloo to Tryavna | 1,170.06 mi (1,883.03 km) |
| Heiloo to Tutrakan | 1,159.88 mi (1,866.65 km) |
| Heiloo to Varna | 1,246.63 mi (2,006.25 km) |
