| Harwich to Smolyan | 1,310.72 mi (2,109.40 km) |
| Harwich to Sofia | 1,207.29 mi (1,942.95 km) |
| Harwich to Sopot | 1,265.50 mi (2,036.62 km) |
| Harwich to Sozopol | 1,393.94 mi (2,243.33 km) |
| Harwich to Sredets | 1,376.50 mi (2,215.26 km) |
| Harwich to Stamboliyski | 1,279.53 mi (2,059.20 km) |
| Harwich to Stara Zagora | 1,310.67 mi (2,109.32 km) |
| Harwich to Svilengrad | 1,361.58 mi (2,191.24 km) |
| Harwich to Svishtov | 1,249.21 mi (2,010.40 km) |
| Harwich to Targovishte | 1,314.18 mi (2,114.97 km) |
| Harwich to Teteven | 1,234.85 mi (1,987.29 km) |
| Harwich to Troyan | 1,254.18 mi (2,018.41 km) |
| Harwich to Tryavna | 1,286.22 mi (2,069.97 km) |
| Harwich to Tutrakan | 1,283.82 mi (2,066.11 km) |
| Harwich to Varna | 1,370.05 mi (2,204.88 km) |
