| Winterthur to Smolyan | 884.06 mi (1,422.76 km) |
| Winterthur to Sofia | 783.90 mi (1,261.57 km) |
| Winterthur to Sopot | 848.46 mi (1,365.46 km) |
| Winterthur to Sozopol | 988.67 mi (1,591.11 km) |
| Winterthur to Sredets | 968.19 mi (1,558.15 km) |
| Winterthur to Stamboliyski | 856.66 mi (1,378.66 km) |
| Winterthur to Stara Zagora | 895.82 mi (1,441.69 km) |
| Winterthur to Svilengrad | 943.17 mi (1,517.88 km) |
| Winterthur to Svishtov | 845.70 mi (1,361.03 km) |
| Winterthur to Targovishte | 912.51 mi (1,468.55 km) |
| Winterthur to Teteven | 818.13 mi (1,316.65 km) |
| Winterthur to Troyan | 839.33 mi (1,350.77 km) |
| Winterthur to Tryavna | 875.02 mi (1,408.22 km) |
| Winterthur to Tutrakan | 892.12 mi (1,435.73 km) |
| Winterthur to Varna | 974.49 mi (1,568.29 km) |
