| Flagstaff to Sinop | 6,702.73 mi (10,787.01 km) |
| Flagstaff to Siran | 6,906.08 mi (11,114.26 km) |
| Flagstaff to Sirnak | 7,145.44 mi (11,499.47 km) |
| Flagstaff to Sirvan | 7,101.85 mi (11,429.32 km) |
| Flagstaff to Sivas | 6,886.89 mi (11,083.37 km) |
| Flagstaff to Sivasli | 6,777.29 mi (10,906.99 km) |
| Flagstaff to Siverek | 7,064.26 mi (11,368.84 km) |
| Flagstaff to Sivrice | 7,020.16 mi (11,297.85 km) |
| Flagstaff to Sivrihisar | 6,770.02 mi (10,895.30 km) |
| Flagstaff to Sogut | 6,699.87 mi (10,782.39 km) |
| Flagstaff to Sogutlu | 6,655.43 mi (10,710.88 km) |
| Flagstaff to Soke | 6,754.94 mi (10,871.03 km) |
| Flagstaff to Solhan | 7,024.08 mi (11,304.17 km) |
| Flagstaff to Soma | 6,677.08 mi (10,745.71 km) |
| Flagstaff to Sorgun | 6,840.00 mi (11,007.92 km) |
