| Kalmthout to Sofia | 1,066.88 mi (1,716.98 km) |
| Kalmthout to Sopot | 1,124.30 mi (1,809.39 km) |
| Kalmthout to Sozopol | 1,251.87 mi (2,014.69 km) |
| Kalmthout to Sredets | 1,234.57 mi (1,986.85 km) |
| Kalmthout to Stamboliyski | 1,138.92 mi (1,832.91 km) |
| Kalmthout to Stara Zagora | 1,169.23 mi (1,881.70 km) |
| Kalmthout to Svilengrad | 1,220.38 mi (1,964.01 km) |
| Kalmthout to Svishtov | 1,107.17 mi (1,781.81 km) |
| Kalmthout to Targovishte | 1,172.03 mi (1,886.20 km) |
| Kalmthout to Teteven | 1,093.67 mi (1,760.09 km) |
| Kalmthout to Troyan | 1,112.82 mi (1,790.90 km) |
| Kalmthout to Tryavna | 1,144.55 mi (1,841.97 km) |
| Kalmthout to Tutrakan | 1,141.48 mi (1,837.04 km) |
| Kalmthout to Varna | 1,227.73 mi (1,975.84 km) |
| Kalmthout to Veliki Preslav | 1,184.92 mi (1,906.94 km) |
