| Conwy to Sinop | 1,943.54 mi (3,127.82 km) |
| Conwy to Siran | 2,184.73 mi (3,515.98 km) |
| Conwy to Sirnak | 2,440.74 mi (3,927.99 km) |
| Conwy to Sirvan | 2,398.25 mi (3,859.60 km) |
| Conwy to Sivas | 2,117.73 mi (3,408.16 km) |
| Conwy to Sivasli | 1,882.67 mi (3,029.87 km) |
| Conwy to Siverek | 2,301.87 mi (3,704.51 km) |
| Conwy to Sivrice | 2,269.78 mi (3,652.86 km) |
| Conwy to Sivrihisar | 1,910.37 mi (3,074.44 km) |
| Conwy to Sogut | 1,830.39 mi (2,945.74 km) |
| Conwy to Sogutlu | 1,802.71 mi (2,901.18 km) |
| Conwy to Soke | 1,830.88 mi (2,946.51 km) |
| Conwy to Solhan | 2,317.57 mi (3,729.77 km) |
| Conwy to Soma | 1,768.39 mi (2,845.95 km) |
| Conwy to Sorgun | 2,040.64 mi (3,284.09 km) |
