| Grobbendonk to Sofia | 1,051.54 mi (1,692.29 km) |
| Grobbendonk to Sopot | 1,109.23 mi (1,785.14 km) |
| Grobbendonk to Sozopol | 1,237.32 mi (1,991.28 km) |
| Grobbendonk to Sredets | 1,219.90 mi (1,963.24 km) |
| Grobbendonk to Stamboliyski | 1,123.64 mi (1,808.32 km) |
| Grobbendonk to Stara Zagora | 1,154.27 mi (1,857.62 km) |
| Grobbendonk to Svilengrad | 1,205.31 mi (1,939.76 km) |
| Grobbendonk to Svishtov | 1,092.59 mi (1,758.35 km) |
| Grobbendonk to Targovishte | 1,157.57 mi (1,862.93 km) |
| Grobbendonk to Teteven | 1,078.59 mi (1,735.82 km) |
| Grobbendonk to Troyan | 1,097.82 mi (1,766.77 km) |
| Grobbendonk to Tryavna | 1,129.71 mi (1,818.09 km) |
| Grobbendonk to Tutrakan | 1,127.37 mi (1,814.32 km) |
| Grobbendonk to Varna | 1,213.54 mi (1,953.00 km) |
| Grobbendonk to Veliki Preslav | 1,170.47 mi (1,883.70 km) |
