| Straelen to Smolyan | 1,105.05 mi (1,778.41 km) |
| Straelen to Sofia | 1,001.01 mi (1,610.97 km) |
| Straelen to Sopot | 1,056.73 mi (1,700.64 km) |
| Straelen to Sozopol | 1,181.67 mi (1,901.72 km) |
| Straelen to Sredets | 1,164.93 mi (1,874.78 km) |
| Straelen to Stamboliyski | 1,072.58 mi (1,726.16 km) |
| Straelen to Stara Zagora | 1,101.03 mi (1,771.93 km) |
| Straelen to Svilengrad | 1,152.72 mi (1,855.12 km) |
| Straelen to Svishtov | 1,037.19 mi (1,669.20 km) |
| Straelen to Targovishte | 1,101.53 mi (1,772.74 km) |
| Straelen to Teteven | 1,026.16 mi (1,651.44 km) |
| Straelen to Troyan | 1,044.84 mi (1,681.51 km) |
| Straelen to Tryavna | 1,075.74 mi (1,731.23 km) |
| Straelen to Tutrakan | 1,069.69 mi (1,721.50 km) |
| Straelen to Varna | 1,156.18 mi (1,860.69 km) |
