| Gravesend to Smolyan | 1,333.25 mi (2,145.65 km) |
| Gravesend to Sofia | 1,230.38 mi (1,980.11 km) |
| Gravesend to Sopot | 1,290.13 mi (2,076.27 km) |
| Gravesend to Sozopol | 1,421.18 mi (2,287.17 km) |
| Gravesend to Sredets | 1,403.13 mi (2,258.12 km) |
| Gravesend to Stamboliyski | 1,302.90 mi (2,096.82 km) |
| Gravesend to Stara Zagora | 1,335.87 mi (2,149.87 km) |
| Gravesend to Svilengrad | 1,386.13 mi (2,230.76 km) |
| Gravesend to Svishtov | 1,276.39 mi (2,054.15 km) |
| Gravesend to Targovishte | 1,341.86 mi (2,159.52 km) |
| Gravesend to Teteven | 1,259.47 mi (2,026.92 km) |
| Gravesend to Troyan | 1,279.24 mi (2,058.74 km) |
| Gravesend to Tryavna | 1,312.08 mi (2,111.60 km) |
| Gravesend to Tutrakan | 1,313.05 mi (2,113.15 km) |
| Gravesend to Varna | 1,398.90 mi (2,251.31 km) |
