| Hudiksvall to Smolyan | 1,427.41 mi (2,297.19 km) |
| Hudiksvall to Sofia | 1,339.67 mi (2,155.99 km) |
| Hudiksvall to Sopot | 1,355.41 mi (2,181.32 km) |
| Hudiksvall to Sozopol | 1,404.09 mi (2,259.67 km) |
| Hudiksvall to Sredets | 1,402.31 mi (2,256.81 km) |
| Hudiksvall to Stamboliyski | 1,388.49 mi (2,234.55 km) |
| Hudiksvall to Stara Zagora | 1,379.10 mi (2,219.44 km) |
| Hudiksvall to Svilengrad | 1,430.03 mi (2,301.40 km) |
| Hudiksvall to Svishtov | 1,295.97 mi (2,085.66 km) |
| Hudiksvall to Targovishte | 1,334.49 mi (2,147.65 km) |
| Hudiksvall to Teteven | 1,332.81 mi (2,144.95 km) |
| Hudiksvall to Troyan | 1,339.26 mi (2,155.33 km) |
| Hudiksvall to Tryavna | 1,348.21 mi (2,169.74 km) |
| Hudiksvall to Tutrakan | 1,281.24 mi (2,061.95 km) |
| Hudiksvall to Varna | 1,353.51 mi (2,178.26 km) |
