| Onda to Smolyan | 1,306.44 mi (2,102.52 km) |
| Onda to Sofia | 1,234.49 mi (1,986.72 km) |
| Onda to Sopot | 1,306.61 mi (2,102.78 km) |
| Onda to Sozopol | 1,457.18 mi (2,345.11 km) |
| Onda to Sredets | 1,431.91 mi (2,304.44 km) |
| Onda to Stamboliyski | 1,296.18 mi (2,086.00 km) |
| Onda to Stara Zagora | 1,352.66 mi (2,176.90 km) |
| Onda to Svilengrad | 1,382.92 mi (2,225.60 km) |
| Onda to Svishtov | 1,337.87 mi (2,153.09 km) |
| Onda to Targovishte | 1,399.26 mi (2,251.89 km) |
| Onda to Teteven | 1,282.18 mi (2,063.47 km) |
| Onda to Troyan | 1,304.93 mi (2,100.08 km) |
| Onda to Tryavna | 1,344.59 mi (2,163.91 km) |
| Onda to Tutrakan | 1,402.08 mi (2,256.43 km) |
| Onda to Varna | 1,466.40 mi (2,359.94 km) |
