| Wattrelos to Smolyan | 1,199.40 mi (1,930.24 km) |
| Wattrelos to Sofia | 1,096.56 mi (1,764.74 km) |
| Wattrelos to Sopot | 1,156.47 mi (1,861.16 km) |
| Wattrelos to Sozopol | 1,288.17 mi (2,073.12 km) |
| Wattrelos to Sredets | 1,269.93 mi (2,043.75 km) |
| Wattrelos to Stamboliyski | 1,169.09 mi (1,881.47 km) |
| Wattrelos to Stara Zagora | 1,202.31 mi (1,934.93 km) |
| Wattrelos to Svilengrad | 1,252.45 mi (2,015.62 km) |
| Wattrelos to Svishtov | 1,143.40 mi (1,840.13 km) |
| Wattrelos to Targovishte | 1,209.05 mi (1,945.78 km) |
| Wattrelos to Teteven | 1,125.81 mi (1,811.82 km) |
| Wattrelos to Troyan | 1,145.66 mi (1,843.76 km) |
| Wattrelos to Tryavna | 1,178.68 mi (1,896.90 km) |
| Wattrelos to Tutrakan | 1,180.97 mi (1,900.58 km) |
| Wattrelos to Varna | 1,266.59 mi (2,038.38 km) |
