| Gustrow to Smolyan | 1,021.95 mi (1,644.67 km) |
| Gustrow to Sofia | 920.06 mi (1,480.69 km) |
| Gustrow to Sopot | 960.25 mi (1,545.37 km) |
| Gustrow to Sozopol | 1,058.86 mi (1,704.08 km) |
| Gustrow to Sredets | 1,047.48 mi (1,685.75 km) |
| Gustrow to Stamboliyski | 984.85 mi (1,584.97 km) |
| Gustrow to Stara Zagora | 997.73 mi (1,605.69 km) |
| Gustrow to Svilengrad | 1,051.71 mi (1,692.56 km) |
| Gustrow to Svishtov | 921.81 mi (1,483.50 km) |
| Gustrow to Targovishte | 978.86 mi (1,575.33 km) |
| Gustrow to Teteven | 931.60 mi (1,499.26 km) |
| Gustrow to Troyan | 945.76 mi (1,522.05 km) |
| Gustrow to Tryavna | 968.60 mi (1,558.81 km) |
| Gustrow to Tutrakan | 936.28 mi (1,506.80 km) |
| Gustrow to Varna | 1,021.92 mi (1,644.62 km) |
