| Idanha-a-Nova to Smolyan | 1,665.90 mi (2,681.00 km) |
| Idanha-a-Nova to Sofia | 1,589.10 mi (2,557.41 km) |
| Idanha-a-Nova to Sopot | 1,661.30 mi (2,673.60 km) |
| Idanha-a-Nova to Sozopol | 1,812.34 mi (2,916.68 km) |
| Idanha-a-Nova to Sredets | 1,787.49 mi (2,876.69 km) |
| Idanha-a-Nova to Stamboliyski | 1,653.34 mi (2,660.79 km) |
| Idanha-a-Nova to Stara Zagora | 1,708.22 mi (2,749.12 km) |
| Idanha-a-Nova to Svilengrad | 1,741.23 mi (2,802.24 km) |
| Idanha-a-Nova to Svishtov | 1,687.43 mi (2,715.66 km) |
| Idanha-a-Nova to Targovishte | 1,750.69 mi (2,817.46 km) |
| Idanha-a-Nova to Teteven | 1,635.58 mi (2,632.21 km) |
| Idanha-a-Nova to Troyan | 1,658.46 mi (2,669.03 km) |
| Idanha-a-Nova to Tryavna | 1,698.10 mi (2,732.82 km) |
| Idanha-a-Nova to Tutrakan | 1,749.19 mi (2,815.04 km) |
| Idanha-a-Nova to Varna | 1,817.78 mi (2,925.44 km) |
