| Speyer to Smolyan | 949.48 mi (1,528.05 km) |
| Speyer to Sofia | 846.44 mi (1,362.21 km) |
| Speyer to Sopot | 906.14 mi (1,458.29 km) |
| Speyer to Sozopol | 1,038.42 mi (1,671.18 km) |
| Speyer to Sredets | 1,019.93 mi (1,641.42 km) |
| Speyer to Stamboliyski | 918.91 mi (1,478.84 km) |
| Speyer to Stara Zagora | 952.00 mi (1,532.09 km) |
| Speyer to Svilengrad | 1,002.12 mi (1,612.75 km) |
| Speyer to Svishtov | 893.71 mi (1,438.29 km) |
| Speyer to Targovishte | 959.59 mi (1,544.30 km) |
| Speyer to Teteven | 875.48 mi (1,408.95 km) |
| Speyer to Troyan | 895.34 mi (1,440.91 km) |
| Speyer to Tryavna | 928.49 mi (1,494.26 km) |
| Speyer to Tutrakan | 932.72 mi (1,501.06 km) |
| Speyer to Varna | 1,017.90 mi (1,638.14 km) |
