| Leiria to Siran | 2,506.28 mi (4,033.46 km) |
| Leiria to Sirnak | 2,732.72 mi (4,397.89 km) |
| Leiria to Sirvan | 2,698.09 mi (4,342.16 km) |
| Leiria to Sivas | 2,406.42 mi (3,872.75 km) |
| Leiria to Sivasli | 2,048.89 mi (3,297.37 km) |
| Leiria to Siverek | 2,565.03 mi (4,128.02 km) |
| Leiria to Sivrice | 2,549.86 mi (4,103.61 km) |
| Leiria to Sivrihisar | 2,129.06 mi (3,426.38 km) |
| Leiria to Sogut | 2,049.99 mi (3,299.15 km) |
| Leiria to Sogutlu | 2,053.30 mi (3,304.47 km) |
| Leiria to Soke | 1,942.79 mi (3,126.61 km) |
| Leiria to Solhan | 2,628.54 mi (4,230.23 km) |
| Leiria to Soma | 1,928.84 mi (3,104.16 km) |
| Leiria to Sorgun | 2,311.50 mi (3,720.01 km) |
| Leiria to Suhut | 2,093.12 mi (3,368.56 km) |
