| Boadilla del Monte to Siran | 2,243.17 mi (3,610.03 km) |
| Boadilla del Monte to Sirnak | 2,468.68 mi (3,972.95 km) |
| Boadilla del Monte to Sirvan | 2,434.19 mi (3,917.45 km) |
| Boadilla del Monte to Sivas | 2,142.75 mi (3,448.42 km) |
| Boadilla del Monte to Sivasli | 1,784.71 mi (2,872.22 km) |
| Boadilla del Monte to Siverek | 2,300.84 mi (3,702.85 km) |
| Boadilla del Monte to Sivrice | 2,285.85 mi (3,678.72 km) |
| Boadilla del Monte to Sivrihisar | 1,864.86 mi (3,001.20 km) |
| Boadilla del Monte to Sogut | 1,785.88 mi (2,874.10 km) |
| Boadilla del Monte to Sogutlu | 1,789.65 mi (2,880.16 km) |
| Boadilla del Monte to Soke | 1,679.19 mi (2,702.40 km) |
| Boadilla del Monte to Solhan | 2,364.94 mi (3,806.00 km) |
| Boadilla del Monte to Soma | 1,664.60 mi (2,678.92 km) |
| Boadilla del Monte to Sorgun | 2,047.68 mi (3,295.42 km) |
| Boadilla del Monte to Suhut | 1,828.90 mi (2,943.33 km) |
