| Leiria to Smolyan | 1,749.21 mi (2,815.09 km) |
| Leiria to Sofia | 1,671.90 mi (2,690.66 km) |
| Leiria to Sopot | 1,744.09 mi (2,806.83 km) |
| Leiria to Sozopol | 1,895.13 mi (3,049.92 km) |
| Leiria to Sredets | 1,870.34 mi (3,010.03 km) |
| Leiria to Stamboliyski | 1,736.41 mi (2,794.48 km) |
| Leiria to Stara Zagora | 1,791.09 mi (2,882.49 km) |
| Leiria to Svilengrad | 1,824.41 mi (2,936.10 km) |
| Leiria to Svishtov | 1,769.58 mi (2,847.86 km) |
| Leiria to Targovishte | 1,833.05 mi (2,950.00 km) |
| Leiria to Teteven | 1,718.22 mi (2,765.21 km) |
| Leiria to Troyan | 1,741.11 mi (2,802.04 km) |
| Leiria to Tryavna | 1,780.73 mi (2,865.81 km) |
| Leiria to Tutrakan | 1,830.99 mi (2,946.69 km) |
| Leiria to Varna | 1,900.11 mi (3,057.93 km) |
