| Niel to Sofia | 1,063.90 mi (1,712.19 km) |
| Niel to Sopot | 1,122.09 mi (1,805.83 km) |
| Niel to Sozopol | 1,250.97 mi (2,013.24 km) |
| Niel to Sredets | 1,233.37 mi (1,984.92 km) |
| Niel to Stamboliyski | 1,136.11 mi (1,828.40 km) |
| Niel to Stara Zagora | 1,167.31 mi (1,878.60 km) |
| Niel to Svilengrad | 1,218.17 mi (1,960.45 km) |
| Niel to Svishtov | 1,106.20 mi (1,780.26 km) |
| Niel to Targovishte | 1,171.34 mi (1,885.08 km) |
| Niel to Teteven | 1,091.44 mi (1,756.50 km) |
| Niel to Troyan | 1,110.80 mi (1,787.67 km) |
| Niel to Tryavna | 1,142.94 mi (1,839.39 km) |
| Niel to Tutrakan | 1,141.57 mi (1,837.18 km) |
| Niel to Varna | 1,227.64 mi (1,975.70 km) |
| Niel to Veliki Preslav | 1,184.26 mi (1,905.89 km) |
