| Harstad to Smolyan | 1,904.11 mi (3,064.37 km) |
| Harstad to Sofia | 1,820.09 mi (2,929.15 km) |
| Harstad to Sopot | 1,831.17 mi (2,946.99 km) |
| Harstad to Sozopol | 1,867.42 mi (3,005.32 km) |
| Harstad to Sredets | 1,868.13 mi (3,006.47 km) |
| Harstad to Stamboliyski | 1,865.39 mi (3,002.06 km) |
| Harstad to Stara Zagora | 1,851.59 mi (2,979.85 km) |
| Harstad to Svilengrad | 1,900.91 mi (3,059.21 km) |
| Harstad to Svishtov | 1,768.56 mi (2,846.23 km) |
| Harstad to Targovishte | 1,802.07 mi (2,900.15 km) |
| Harstad to Teteven | 1,810.10 mi (2,913.07 km) |
| Harstad to Troyan | 1,814.97 mi (2,920.91 km) |
| Harstad to Tryavna | 1,820.91 mi (2,930.47 km) |
| Harstad to Tutrakan | 1,747.63 mi (2,812.53 km) |
| Harstad to Varna | 1,814.57 mi (2,920.26 km) |
