| Morriston to Sinop | 1,936.29 mi (3,116.15 km) |
| Morriston to Siran | 2,178.65 mi (3,506.20 km) |
| Morriston to Sirnak | 2,433.07 mi (3,915.65 km) |
| Morriston to Sirvan | 2,391.25 mi (3,848.34 km) |
| Morriston to Sivas | 2,106.61 mi (3,390.26 km) |
| Morriston to Sivasli | 1,853.10 mi (2,982.28 km) |
| Morriston to Siverek | 2,289.26 mi (3,684.20 km) |
| Morriston to Sivrice | 2,259.05 mi (3,635.60 km) |
| Morriston to Sivrihisar | 1,887.74 mi (3,038.02 km) |
| Morriston to Sogut | 1,806.78 mi (2,907.74 km) |
| Morriston to Sogutlu | 1,782.70 mi (2,868.98 km) |
| Morriston to Soke | 1,794.01 mi (2,887.18 km) |
| Morriston to Solhan | 2,311.34 mi (3,719.74 km) |
| Morriston to Soma | 1,736.45 mi (2,794.54 km) |
| Morriston to Sorgun | 2,026.33 mi (3,261.07 km) |
