| Gembloux to Sofia | 1,033.95 mi (1,663.98 km) |
| Gembloux to Sopot | 1,093.26 mi (1,759.43 km) |
| Gembloux to Sozopol | 1,224.15 mi (1,970.08 km) |
| Gembloux to Sredets | 1,206.07 mi (1,940.98 km) |
| Gembloux to Stamboliyski | 1,106.38 mi (1,780.54 km) |
| Gembloux to Stara Zagora | 1,138.90 mi (1,832.89 km) |
| Gembloux to Svilengrad | 1,189.29 mi (1,913.97 km) |
| Gembloux to Svishtov | 1,079.36 mi (1,737.06 km) |
| Gembloux to Targovishte | 1,144.89 mi (1,842.52 km) |
| Gembloux to Teteven | 1,062.60 mi (1,710.09 km) |
| Gembloux to Troyan | 1,082.29 mi (1,741.78 km) |
| Gembloux to Tryavna | 1,115.04 mi (1,794.49 km) |
| Gembloux to Tutrakan | 1,116.45 mi (1,796.76 km) |
| Gembloux to Varna | 1,202.17 mi (1,934.70 km) |
| Gembloux to Veliki Preslav | 1,157.87 mi (1,863.41 km) |
