| Erquelinnes to Sofia | 1,049.50 mi (1,689.01 km) |
| Erquelinnes to Sopot | 1,109.80 mi (1,786.05 km) |
| Erquelinnes to Sozopol | 1,242.30 mi (1,999.28 km) |
| Erquelinnes to Sredets | 1,223.84 mi (1,969.58 km) |
| Erquelinnes to Stamboliyski | 1,122.09 mi (1,805.83 km) |
| Erquelinnes to Stara Zagora | 1,155.79 mi (1,860.06 km) |
| Erquelinnes to Svilengrad | 1,205.73 mi (1,940.43 km) |
| Erquelinnes to Svishtov | 1,097.56 mi (1,766.36 km) |
| Erquelinnes to Targovishte | 1,163.37 mi (1,872.26 km) |
| Erquelinnes to Teteven | 1,079.15 mi (1,736.72 km) |
| Erquelinnes to Troyan | 1,099.11 mi (1,768.85 km) |
| Erquelinnes to Tryavna | 1,132.37 mi (1,822.38 km) |
| Erquelinnes to Tutrakan | 1,135.94 mi (1,828.12 km) |
| Erquelinnes to Varna | 1,221.35 mi (1,965.58 km) |
| Erquelinnes to Veliki Preslav | 1,176.38 mi (1,893.21 km) |
