| Middelburg to Smolyan | 1,206.87 mi (1,942.27 km) |
| Middelburg to Sofia | 1,103.28 mi (1,775.56 km) |
| Middelburg to Sopot | 1,161.03 mi (1,868.49 km) |
| Middelburg to Sozopol | 1,289.02 mi (2,074.47 km) |
| Middelburg to Sredets | 1,271.64 mi (2,046.50 km) |
| Middelburg to Stamboliyski | 1,175.40 mi (1,891.62 km) |
| Middelburg to Stara Zagora | 1,206.06 mi (1,940.97 km) |
| Middelburg to Svilengrad | 1,257.11 mi (2,023.12 km) |
| Middelburg to Svishtov | 1,144.30 mi (1,841.57 km) |
| Middelburg to Targovishte | 1,209.23 mi (1,946.06 km) |
| Middelburg to Teteven | 1,130.38 mi (1,819.18 km) |
| Middelburg to Troyan | 1,149.61 mi (1,850.12 km) |
| Middelburg to Tryavna | 1,181.49 mi (1,901.42 km) |
| Middelburg to Tutrakan | 1,178.83 mi (1,897.15 km) |
| Middelburg to Varna | 1,265.05 mi (2,035.91 km) |
